The purpose of this blog is the creation of an open, international, independent and free forum, where every UFO-researcher can publish the results of his/her research. The languagues, used for this blog, are Dutch, English and French.You can find the articles of a collegue by selecting his category. Each author stays resposable for the continue of his articles. As blogmaster I have the right to refuse an addition or an article, when it attacks other collegues or UFO-groupes.
Druk op onderstaande knop om te reageren in mijn forum
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Deze blog is opgedragen aan mijn overleden echtgenote Lucienne.
In 2012 verloor ze haar moedige strijd tegen kanker!
In 2011 startte ik deze blog, omdat ik niet mocht stoppen met mijn UFO-onderzoek.
BEDANKT!!!
Een interessant adres?
UFO'S of UAP'S, ASTRONOMIE, RUIMTEVAART, ARCHEOLOGIE, OUDHEIDKUNDE, SF-SNUFJES EN ANDERE ESOTERISCHE WETENSCHAPPEN - DE ALLERLAATSTE NIEUWTJES
UFO's of UAP'S in België en de rest van de wereld Ontdek de Fascinerende Wereld van UFO's en UAP's: Jouw Bron voor Onthullende Informatie!
Ben jij ook gefascineerd door het onbekende? Wil je meer weten over UFO's en UAP's, niet alleen in België, maar over de hele wereld? Dan ben je op de juiste plek!
België: Het Kloppend Hart van UFO-onderzoek
In België is BUFON (Belgisch UFO-Netwerk) dé autoriteit op het gebied van UFO-onderzoek. Voor betrouwbare en objectieve informatie over deze intrigerende fenomenen, bezoek je zeker onze Facebook-pagina en deze blog. Maar dat is nog niet alles! Ontdek ook het Belgisch UFO-meldpunt en Caelestia, twee organisaties die diepgaand onderzoek verrichten, al zijn ze soms kritisch of sceptisch.
Nederland: Een Schat aan Informatie
Voor onze Nederlandse buren is er de schitterende website www.ufowijzer.nl, beheerd door Paul Harmans. Deze site biedt een schat aan informatie en artikelen die je niet wilt missen!
Internationaal: MUFON - De Wereldwijde Autoriteit
Neem ook een kijkje bij MUFON (Mutual UFO Network Inc.), een gerenommeerde Amerikaanse UFO-vereniging met afdelingen in de VS en wereldwijd. MUFON is toegewijd aan de wetenschappelijke en analytische studie van het UFO-fenomeen, en hun maandelijkse tijdschrift, The MUFON UFO-Journal, is een must-read voor elke UFO-enthousiasteling. Bezoek hun website op www.mufon.com voor meer informatie.
Samenwerking en Toekomstvisie
Sinds 1 februari 2020 is Pieter niet alleen ex-president van BUFON, maar ook de voormalige nationale directeur van MUFON in Vlaanderen en Nederland. Dit creëert een sterke samenwerking met de Franse MUFON Reseau MUFON/EUROP, wat ons in staat stelt om nog meer waardevolle inzichten te delen.
Let op: Nepprofielen en Nieuwe Groeperingen
Pas op voor een nieuwe groepering die zich ook BUFON noemt, maar geen enkele connectie heeft met onze gevestigde organisatie. Hoewel zij de naam geregistreerd hebben, kunnen ze het rijke verleden en de expertise van onze groep niet evenaren. We wensen hen veel succes, maar we blijven de autoriteit in UFO-onderzoek!
Blijf Op De Hoogte!
Wil jij de laatste nieuwtjes over UFO's, ruimtevaart, archeologie, en meer? Volg ons dan en duik samen met ons in de fascinerende wereld van het onbekende! Sluit je aan bij de gemeenschap van nieuwsgierige geesten die net als jij verlangen naar antwoorden en avonturen in de sterren!
Heb je vragen of wil je meer weten? Aarzel dan niet om contact met ons op te nemen! Samen ontrafelen we het mysterie van de lucht en daarbuiten.
25-03-2025
A Swarm of Spacecraft Could Intercept Interstellar Objects
A Swarm of Spacecraft Could Intercept Interstellar Objects
By Evan Gough
New research claims the best way to study an Interstellar Object is by having a swarm of spacecraft at the ready. This image shows Interstellar Object trajectories in yellow and potential spacecraft trajectories in blue. Image Credit: Tsukamoto et al. 2025.
We've learned that Interstellar Objects (ISOs) are not strangers to our Solar System. Many have visited, and many more will in the future. The Vera Rubin Observatory is expected to find hundreds each year. Scientists are keen to learn more about them, and a swarm of spacecraft on standby might be the way to do it.
On a basic level, an ISO is simply an object unbound to any star. The two we know of are 'Oumuamua which was detected in 2017, and Comet Borisov, detected in 2019. ISOs typically have very high velocities, follow hyperbolic trajectories that show they don't orbit the Sun, and have unique compositions that set them apart from Solar System bodies. 'Oumuamua, for example, could be a hydrogen iceberg, though this is just one possibility.
Scientists are eager to examine these objects closer and understand their compositions and origins. Unfortunately, their high velocities make them elusive, and we can only glimpse them with ground-based telescopes. What's needed is a way to visit one. The best way to do that is to have a spacecraft waiting to catch up with one as it passes through the inner Solar System.
Or even better, a whole swarm of spacecraft that don't require explicit instructions to rendezvous with an ISO.
Hiroyasu Tsukamoto is with the Department of Aerospace Engineering in the Grainger College of Engineering at the University of Illinois Urbana-Champaign. He and his colleagues developed Neural Rendezvous, a deep learning-driven guidance and control framework that can autonomously guide spacecraft to ISOs. Their work is in a paper titled "Neural-Rendezvous: Provably Robust Guidance and Control to Encounter Interstellar Objects" and published in Aerospace Research Central.
Artist's illustration. ISOs like Oumuamua only come through once, making them difficult targets for rendezvous.
Image Credit: NASA
"A human brain has many capabilities: talking, writing, etcetera," Tsukamoto said in a press release. "Deep learning creates a brain specialized for one of these capabilities with a domain-specific knowledge. In this case, Neural-Rendezvous learns all the information it needs to encounter an ISO, while also considering the safety-critical, high-cost nature of space exploration."
"Our key contribution is not just in designing the specialized brain, but in proving mathematically that it works," Tsukamoto added. "For example, with a human brain we learn from experience how to navigate safely while driving. But what are the mathematics behind it? How do we know and how can we make sure we won't hit anyone?"
The system is based on the "contraction theory for data-driven nonlinear control systems." Contraction theory is a rigorous mathematical framework which can place limits on the effects of disturbances and uncertainties in complex linear systems. Basically, it can provide stability in a complex situation that changes nonlinearly over time.
The Neural-Rendezvous system uses available data to predict a spacecraft's best actions to intercept an ISO. This complexity is necessary because ISOs are unbound and high-speed targets with poorly restrained trajectories.
"We’re trying to encounter an astronomical object that streaks through our solar system just once and we don’t want to miss the opportunity," Tsukamoto said. "Even though we can approximate the dynamics of ISOs ahead of time, they still come with large state uncertainty because we cannot predict the timing of their visit. That's a challenge."
The Hubble space telescope captured this image of Comet 2l/Borisov at perihelion in December 2019.
Image Credit: NASA, ESA, and D. Jewitt (UCLA)
ISOs only pass through the Solar System once. The usual method of observing an object like an asteroid or comet and determining its orbit doesn't work. According to the researchers, it's critical that ISO interceptors can "think" on their own.
"Unlike traditional approaches in which you design almost everything before you launch a spacecraft, to encounter an ISO, a spacecraft has to have something like a human brain, specifically designed for this mission, to fully respond to data onboard in real-time," Tsukamoto said.
There's no way to orbit an ISO. Oumuamua and Borisov were travelling at ~88 and 45 km/s relative to the Sun, so an intercepting spacecraft would need to travel at similar speeds. With our current technological level, a spacecraft would have to carry a prohibitively large volume of propellant to enter into orbit around one of these objects. Fast flybys are likely the only realistic mission architecture.
However, relying on a single spacecraft is like putting all your eggs in one basket. What if the spacecraft is unable to get a clear view of the ISO? Without a good look at the object, scientists won't be able to learn much about its surface and composition. This has led some researchers to consider multiple spacecraft.
Tsukamoto worked with two other researchers on "a novel multi-spacecraft framework for locally maximizing information to be gained through ISO encounters." Their work is presented in a separate paper titled "Information-Optimal Multi-Spacecraft Positioning for Interstellar Object Exploration." Along with Tsukamoto, the other authors are Arna Bhardwaj and Shishir Bhatta. The authors presented it at the 2024 IEEE Aerospace Conference.
"Because of the speed and uncertainty, it's challenging to obtain a clear view of an ISO during a flyby with 100 percent accuracy, even with Neural-Rendezvous," Tsukamoto said. "Arna and Shishir wanted to show that Neural-Rendezvous could benefit from a multi-spacecraft concept."
"Interstellar objects (ISOs), astronomical objects not gravitationally bound to the Sun, could present valuable opportunities to advance our understanding of the universe's formation and composition," the authors write in their paper. "In response to the unpredictable nature of their discoveries that inherently come with large and rapidly changing uncertainty in their state, this paper proposes a novel multi-spacecraft framework for locally maximizing information to be gained through ISO encounters with formal probabilistic guarantees."
Their framework involves a swarm of spacecraft, called deputy spacecraft, and one designated as chief. The swarm would be located around an ellipsoid representing the space through which an ISO will travel. The ellipsoid consists of multiple points of interest (POIs) that would be covered collectively by the deputies and the chief employing the Neural-Rendezvous system. This method can maximize the information gained from the encounter. In simple terms, it guarantees multiple views of the ISO.
"Now we have an additional layer of decision-making during the ISO encounter," Tsukamoto said. "How do you optimally position multiple spacecraft to maximize the information you can get out of it? Their solution was to distribute the spacecraft to visually cover the highly probable region of the ISO's position, which is driven by Neural-Rendezvous."
This simple drawing illustrates the deputy spacecraft in different positions in an ellipsoid an ISO is expected to pass through.
Image Credit: Bhardwaj et al. 2025.
The number of spacecraft in the swarm would depend on the size of the uncertainty ellipsoid. The team ran simulations to examine the optimal number of spacecraft while keeping the cost down. With infinite resources, the swarm could be large enough to guarantee success. However, that's not how things work.
In three trials, they determined that five spacecraft delivered the best results when balancing all factors.
This diagram shows the terminal positions of a five-spacecraft system and the POIs in view and not in view.
Image Credit: Bhardwaj et al. 2025.
At the moment, Neural-Rendezvous is largely theoretical. However, the work done by Bhardwaj and Bhatta illustrates how it could be employed practically to maximum effect.
As unwitting messengers from other solar systems, ISOs have a scientific value that could surprise us. They could hold clues to how solar systems form and evolve that are found nowhere else. An autonomous swarm of spacecraft could help scientists collect these clues.
A red and white dwarf star are orbiting tightly – and creating odd signals(Picture: Getty)
For ten years, Earth has been at the receiving end of mysterious radio emissions every two hours.
After more than a decade, the source of these signals has finally been identified, nearby the Big Dipper.
A new research paper published in Nature Astronomy points to a red dwarf and white dwarf star, which are orbiting so tightly that their magnetic fields are sending out radio signals whenever they collide, which is every two hours.
The discovery is surprising to scientists, who previously had only managed to attribute radio blasts to neutron stars.
Dr Iris de Ruiter, who led the study, said: ‘We worked with experts from all kinds of astronomical disciplines.
‘With different techniques and observations, we got a little closer to the solution step by step.’
The signal was not sent by aliens but was emitted from a star-forming galaxy called ‘SDSSJ0826+5630’, when the universe was only 4.9 billion years old.
What makes this radio signal special is that it’s at a specific wavelength known as the ’21 cm line’.
‘It’s the equivalent to a look-back in time of 8.8 billion years,’ said Arnab Chakraborty, a cosmologist and co-author of a study on the detection.
It was the first time this type of radio signal has been detected at such a massive distance.
Strange-looking pulses which lasted about 300 milliseconds each were noticed by Manisha Caleb, a lecturer at the University of Sydney.
‘The flash had some characteristics of a radio-emitting neutron star. But this wasn’t like anything we’d seen before,’ she said.
A neutron star is the collapsed remains of a massive supergiant star. Apart from a black hole, they are the smallest and densest stellar objects known to man.
Scientists release the most detailed images ever of the first stars and galaxies
Scientists release the most detailed images ever of the first stars and galaxies
By measuring the faint traces of the cosmic microwave background—light that’s traveled more than 13 billion years to reach us—researchers have reconstructed the state of the universe when it was just 380,000 years old.
The most detailed view yet of the universe’s earliest light has just been revealed—offering a rare look at the moment the cosmos began to take shape. Captured by a global team of scientists using the Atacama Cosmology Telescope(ACT) in Chile, this new dataset brings us closer to understanding how the first stars and galaxies formed, and what they can tell us about how fast the universe is truly expanding.
By measuring the faint traces of the cosmic microwave background—light that’s traveled more than 13 billion years to reach us—researchers have reconstructed the state of the universe when it was just 380,000 years old. These new images go beyond previous efforts in both precision and depth, offering a critical benchmark in a field where every detail counts.
Scientists Capture the Most Detailed View of the Universe’s Earliest Light The Daily Galaxy --Great Discoveries Channel
But this breakthrough isn’t just about looking backward—it’s also about resolving a tension that’s been growing louder in the world of cosmology: how fast is our universe expanding, really?
A universe written in light
What these new images show is nothing short of extraordinary. The data reveals early clouds of hydrogen and helium collapsing under gravity—structures that would later evolve into the very first galaxies.
The observable universe stretches almost 50 billion light-years in every direction
Its mass equals nearly 1,900 zetta-suns—roughly 2 trillion trillion times the mass of our Sun
Only 100 zetta-suns represent “normal matter”—hydrogen, helium, and the elements we’re made of
The rest is split between dark matter (500 zetta-suns) and dark energy (1,300 zetta-suns)
By examining the cosmic microwave background in unprecedented high definition, researchers have validated a straightforward model of the universe—effectively dismissing a wide range of competing theories. Credit: ACT Collaboration; ESA/Planck Collaboration.
Professor Erminia Calabrese, who led the analysis, explained that this level of precision allows us to “trace the seeds of all cosmic structure,” from galaxy clusters to the atoms in our own bodies.
The battle over the Hubble constant just got hotter
At the heart of modern cosmology lies one of its most uncomfortable problems—the Hubble tension. That’s the name scientists have given to the growing disagreement between two different ways of measuring the expansion rate of the universe.
One method, using nearby galaxies, suggests the universe is expanding at around 74 km/s/Mpc. But measurements from the cosmic microwave background give a lower rate—around 67 km/s/Mpc.
This new data from ACT backs the lower value, and with more precision than ever before. According to Calabrese, the team examined dozens of alternate models that might explain a faster expansion, but “none of them fit the data.”
The implication? Some of the most radical theories trying to explain this discrepancy may now be off the table.
This marks the final release of ACT’s data after nearly two decades of operation. Since 2004, it has played a central role in shaping our picture of the early universe. Now, attention is shifting to the Simons Observatory, a next-generation facility set to continue this work with even greater resolution.
For researcher Hidde Jense, who worked on the final phase of ACT’s data analysis, the project represents the culmination of years of effort. “ACT has been my cosmic laboratory during my Ph.D. studies. It has been thrilling to be part of the endeavor leading to this refined understanding of our universe,” he reflected.
Artistieke weergave van een Nighthawk die over een vulkaan vliegt.
Krediet - D Loya & P Lee.
Inleiding De verkenning van Mars heeft een nieuwe dimensie gekregen met de succesvolle vlucht van de Ingenuity, een kleine quadcopter die bewezen heeft op een andere planeet te kunnen opereren. Gedurende meer dan 72 vluchten heeft deze helikopter de verbeelding van fans van ruimteverkenning over de hele wereld weten te vangen. Echter, verschillende factoren hebben de mogelijkheden van deze missie beperkt, en onderzoekers bij NASA zijn van mening dat ze het beter kunnen doen. Twee artikelen gepresenteerd op de recente Lunar and Planetary Science Conference, gehouden van 10 tot 14 maart in The Woodlands, Texas, en geleid door Pascal Lee van NASA Ames en Derric Loya van het SETI Institute en de Colorado Mesa University, beschrijven een toepassingsscenario voor de nog in ontwikkeling zijnde helikopter, die ze Nighthawk noemen.
NASA onthult ontwerp voor grotere Mars-helicopter genaamd Mars Chopper...
Noctis Labyrinthus: Een Unieke Verkenningslocatie Er zijn tal van interessante plaatsen op Mars te verkennen, maar één gebied springt eruit voor fans van Marsverkenning. Dr. Lee is ongetwijfeld een van die fans, aangezien hij de oprichter is van het Mars Institute, een non-profitorganisatie die zich richt op onderzoek naar de Rode Planeet. De locatie die eruit springt, is Noctis Labyrinthus – het Labyrint van de Nacht.
Noctis Labyrinthus is om verschillende redenen interessant, maar een van de belangrijkste is de geografische locatie. Het ligt ingeklemd tussen Valles Marineris aan de oostkant en Tharsis, de enorme schildvulkaan, aan de westkant. Een specifieke locatie, bekend als Noctis Landing, in het oosten van het gebied, is regelmatig voorgesteld als een potentiële landingsplaats voor toekomstige bemande missies.
Fraser bespreekt het gebruik van hulpbronnen op Mars - waarvan Noctis Labyrinthus er veel kan bevatten.
Echter, het terrein van Noctis Labyrinthus is uitermate uitdagend. Het bevat duinvelden, oude lavastromen, gigantische rotsblokken en zelfs diepere kloven. Met andere woorden, het is geen plek waar een rover effectief zou kunnen navigeren.
De Voordelen van Een Helikopter Een helikopter daarentegen zou wel effectief kunnen opereren. Veilig landen in het gebied kan lastig zijn, maar een helikopter kan boven het tumult zweven, alleen landen wanneer hij een veilige plek vindt en tegelijkertijd dramatische luchtfoto's kan maken.
Waarom zou men dan niet gewoon Ingenuity of een vergelijkbare helikopter gebruiken? Dit is de kern van een van de gepresenteerde artikelen, en het antwoord ligt in drie specifieke redenen:
Afhankelijkheid van een Rover: Ingenuity is afhankelijk van een rover (Perseverance) om communicatiesignalen terug naar de aarde te relayen, en rovers zijn niet bijzonder nuttig in Noctis Labyrinthus.
Beperkte Hoogte: Ingenuity kan slechts een hoogte van ongeveer 25 meter boven de grond bereiken, wat onvoldoende is om enkele obstakels in het gebied te omzeilen – de auteurs schatten dat minstens 100 meter boven de grond nodig is.
Onvoldoende Stuwkracht: Ingenuity zou niet genoeg stuwkracht hebben om te vliegen in de minder dichte Martiaanse atmosfeer in de regio, althans niet gedurende het grootste deel van het jaar. En het zou zeker niet genoeg stuwkracht hebben om een payload van 3 kg te vervoeren, zoals de auteurs dat zouden willen voor hun wetenschappelijke missie.
Fraser bespreekt het leven en de erfenis van Ingenuity - de eerste helikopter op Mars.
De NASA Mars Chopper: Nighthawk Dat is waar de NASA Mars Chopper om de hoek komt kijken. Het wordt ontworpen als een op zichzelf staande drone van SUV-grootte, die in staat is een wetenschappelijke payload van maximaal 5 kg tot 3 km per dag te vervoeren. Dit sluit veel beter aan bij de wetenschappelijke doelen van het team voor Nighthawk. Ze verwachten een payload van 3 kg die bestaat uit een kleurencamera, een nabij-infraroodcamera en een neutronenteller die ook als waterdetectie-instrument dient.
Nighthawk wordt verwacht ongeveer 300 km te reizen tijdens zijn primaire wetenschappelijke missie. Het zal op zoek gaan naar aanwijzingen voor potentiële waterafzettingen en de evolutie van dit deel van de Rode Planeet bestuderen. Een "lichte tonafzetting," of LTD, is van bijzonder belang nabij de Relict-gletsjer, die veel water zou kunnen bevatten, dichter bij de evenaar dan de bekende afzettingen nabij de polen.
NASA’s Mars Chopper Concept (Animatie)
Toekomstige Missies en Ondersteuning Er zijn al veel missies die hopen gebruik te maken van de Mars Chopper, hoewel Nighthawk zich onderscheidt als een zeer goed doordacht plan en al de steun heeft van een van NASA's vooraanstaande Mars-wetenschappers. Momenteel is er geen vaste datum voor de voltooiing van de nieuwe Mars Chopper. Terwijl de ontwikkeling voortgaat, zullen missiestrategen ongetwijfeld beginnen te kijken naar architecturen zoals Nighthawk om te bepalen waar de nieuw ontworpen enorme drone als eerste zal gaan.
Conclusie De ontwikkeling van de Nighthawk is een veelbelovende stap in de richting van geavanceerdere en effectievere verkenning van Mars. Met de mogelijkheid om boven uitdagend terrein te vliegen, biedt deze nieuwe helikopter een unieke kans om belangrijke wetenschappelijke gegevens te verzamelen en meer te leren over de geologie en potentiële hulpbronnen van de Rode Planeet. De toekomst van Marsverkenning lijkt veelbelovend, en de Nighthawk kan wel eens een cruciale rol spelen in de ontdekkingen die nog komen gaan.
Door de unieke kenmerken van Noctis Labyrinthus en de wetenschappelijke doelen die met de Nighthawk kunnen worden bereikt, kunnen we ons een dieper begrip van Mars voorstellen en de mogelijkheden voor toekomstige bemande missies verder verkennen. De vooruitgang in technologie en ontwerp zal niet alleen onze kennis van de Rode Planeet vergroten, maar ook ons begrip van de mogelijkheden voor leven en de toekomst van menselijke verkenning in ons zonnestelsel.
Toekomstige Richtingen in Marsverkenning De ontwikkeling van de Nighthawk en de toepassing ervan in gebieden zoals Noctis Labyrinthus biedt niet alleen technische uitdagingen, maar opent ook de deur naar nieuwe wetenschappelijke vragen. Wat kunnen we leren over de geologische geschiedenis van Mars door het bestuderen van deze unieke landschappen? Hoe kunnen we de gegevens die door de Nighthawk worden verzameld gebruiken om onze modellen van de klimaatverandering op Mars te verbeteren?
Bovendien kunnen de bevindingen van de Nighthawk ook implicaties hebben voor de zoektocht naar leven op Mars. Door het identificeren van waterafzettingen en het bestuderen van de chemische samenstelling ervan, kunnen wetenschappers beter begrijpen waar leven zou kunnen zijn ontstaan of waar het nu aanwezig zou kunnen zijn. De combinatie van geavanceerde technologie met gedegen wetenschappelijk onderzoek kan ons helpen de mysteries van de Rode Planeet te ontrafelen.
In de komende jaren zullen de ontwikkelingen op het gebied van Marsverkenning en de rol van de Nighthawk ongetwijfeld een belangrijke impact hebben op ons begrip van Mars en de mogelijkheden voor toekomstige menselijke verkenning. De inzet van nieuwe technologieën en methoden zal ons helpen om de uitdagingen van Marsverkenning aan te gaan en ons dichter bij ons doel te brengen om het leven en de geschiedenis van deze fascinerende planeet te begrijpen.
The World's Oldest Impact Crater Has Been Found in Australia
The World's Oldest Impact Crater Has Been Found in Australia
By Evan Gough
The researchers found large conical shatter cones within the Pilbara Craton in Western Australia. They're visible evidence of a meteorite impact 3.5 billion years ago. Credit: Chris Kirkland, Curtin University
The surfaces of the Moon, Mercury, and Mars are easily visible and are littered with impact craters. Earth has been subjected to the same bombardment, but geological activity and weathering have eliminated most of the craters. The ones that remain are mostly only faint outlines or remnants. However, researchers in Australia have succeeded in finding what they think is the oldest impact crater on Earth.
Their research, "A Paleoarchaean impact crater in the Pilbara Craton, Western Australia," is published in Nature Communications. The lead authors are Christopher Kirkland and Professor Tim Johnson, both from Curtin University in Australia. The Pilbara Craton is one of only two pristine Archaean sections of crust and is the subject of much geological research.
Impactors were more common in the distant past, especially large ones. In the Paleoarchaean era, which spans from about 3.6 to 3.2 billion years ago, the Solar System was much more chaotic than it is now. There were more asteroids and debris in orbit around the Sun, and more of them crashed into the planets and the Moon. Earth didn't escape this fate, and ancient impacts affected how the continents formed, shaped the environment, helped make Earth habitable, and affected the overall conditions of the planet.
"Before our discovery, the oldest impact crater was 2.2 billion years old, so this is by far the oldest known crater ever found on Earth," Professor Johnson said.
"We know large impacts were common in the early solar system from looking at the Moon. Until now, the absence of any truly ancient craters means they are largely ignored by geologists," said Johnson. "This study provides a crucial piece of the puzzle of Earth's impact history and suggests there may be many other ancient craters that could be discovered over time."
The crater was excavated by a meteorite striking Earth at more than 36,000 km/h. The crater is more than 100 km wide, and the powerful impact would've affected the entire globe with flying debris. At the time, the only life was microbial and constrained to water.
The impact could have had a long-lasting effect on the Earth, helping shape the planet into what it is today. There's an ongoing scientific discussion about ancient impacts and their effect on the planet's crust. Some think these giant impacts could have initiated deep mantle plumes and subduction zones.
There's some evidence that giant impacts could've created mantle plumes and subduction zones.
Image Credit: Koppers et al. 2025. Mantle plumes and their role in Earth processes. Nat Rev Earth Environ. https://doi.org/10.1038/s43017-021-00168-6
Some scientists go even further and wonder if these large impacts could be responsible for Earth's continents.
"The role of meteorite impacts in the origin, modification, and destruction of crust during the first two billion years of Earth history (4.5–2.5 billion years ago; Ga) is disputed," the authors write. "Whereas some argue for a relatively minor contribution overall, others have proposed that individual giant impactors (>10–50 km diameter) can initiate subduction zones and deep mantle plumes, arguably triggering a chain of events that formed cratons, the ancient nuclei of the continents."
Cratons are the large, stable parts of Earth's crust and upper mantle, known as the lithosphere. As the continents moved around, sometimes merging and sometimes rifting, cratons survived. Scientists call them the 'seeds' of continents.
Many scientists think that Earth's ancient rocks formed above mantle plumes. Others think that the oldest rocks formed because of plate tectonics. In both cases, the formation is driven by heat from the planet's interior. However, Johnson and his colleagues are pursuing a different idea.
In a 2022 paper, Johnson and fellow researchers proposed that the heat necessary to form cratons and continents came from an otherworldly source: impacts. Impactors many kilometres in diameter could've delivered the heat. "Giant impacts provide a mechanism for fracturing the crust and establishing prolonged hydrothermal alteration by interaction with the globally extensive ocean," they wrote. Massive mantle melting from the impact would've created a thick nucleus that eventually formed a continent, they explained.
They were talking specifically about Australia's Pilbara Craton, the "best-preserved Archaean (4.0–2.5 billion years ago (Ga)) continental remnant."
Based on that, Kirkland, Johnson, and their fellow researchers knew where to look for evidence. While much of the evidence they had was microscopic, like zircon crystals and spherules, they wanted something more visible to convince other geologists. They knew what the evidence would look like: shatter cones. Shatter cones are rare and form in only two situations: in bedrock under impact craters or nuclear explosions. In both cases, there's an extremely powerful shock.
As Johnson explains in The Conversation, they went to the Pilbara for two weeks of fieldwork in 2021. Remarkably, they found shatter cones on the first day.
This image shows some of the shatter cones the researchers found in the study region.
Credit: Tim Johnson, Curtin University
"Our observations showed that above the layer with the shatter cones was a thick layer of basalt with no evidence of impact shock. This meant the impact had to be the same age as the Antarctic Member rocks, which we know are 3.5 billion years old," Johnson and his colleagues wrote in The Conversation.
This schematic shows the geological layers in the study area, the Antarctic Creek Member. "We speculate that the carbonate breccias represent the lithified and hydrothermally-altered products of impact-related deposits," the authors explain.
Image Credit: Kirkland et al. 2025
The Antarctic Member is a complex, mostly metasedimentary layer located in the central East Pilbara Terrane in Western Australia. This type of rock is first formed from solidified sediments. Then, it is buried under subsequent rock layers and subjected to heat and intense pressure, turning it into a metamorphic rock. Since the layers above it are unshocked, the researchers can date the impact.
This map from the published research shows the region's geology in detail. The study area is marked with a red star. The dashed lines are where spherules have been found in the region.
Image Credit: Kirkland et al. 2025
These findings are clear evidence of ancient impacts, which scientists were almost certain must have occurred just as they did on other Solar System bodies. They also offer evidence that ancient impacts formed cratons and, hence, led to the formation of continents. However, it's too soon to conclude that this is how things happened. It needs more research. This discovery will also likely drive further investigation into other ancient terranes on Earth for evidence of shatter cones.
Ancient impacts could have shaped our planet beyond geology. Some research shows that these ancient impacts could have given life an initial nudge. Their impacts provided long-lasting heat in the form of systems of hydrothermal vents. This allowed hot water to interact with rock, which could've created environments rich in chemistry and minerals. Scientists think these elements are critical for the emergence of life.
“Uncovering this impact and finding more from the same time period could explain a lot about how life may have got started, as impact craters created environments friendly to microbial life such as hot water pools," Professor Kirkland said.
"It also radically refines our understanding of crust formation: the tremendous amount of energy from this impact could have played a role in shaping early Earth's crust by pushing one part of the Earth's crust under another or by forcing magma to rise from deep within the Earth's mantle toward the surface," Kirkland added.
"It may have even contributed to the formation of cratons, which are large, stable landmasses that became the foundation of continents," he concluded.
During its final hours on the lunar surface, the Blue Ghost spacecraft captured stunning photos of a lunar sunset.
Lunar sunset captured by the Blue Ghost spacecraft during its final hours.
(Image credit: Firefly Aerospace)
NASA has released the first ever high-definition photographs of a sunset on the moon to mark the completion of the Blue Ghost lunar lander's maiden mission to our rocky satellite.
The image shows a ghostly glow above the cratered lunar horizon.
"These are the first high-definition images taken of the sun going down and then going into darkness at the horizon," Joel Kearns, deputy associate administrator for exploration at NASA, said in a news briefing on Tuesday (March 18).
The lunar lander, built and operated in collaboration with commercial space exploration company Firefly Aerospace, touched down on the moon on March 2. Its mission lasted for 14 days — the equivalent of one lunar day — until its shutdown on Sunday (March 16). Like most lunar landers, Blue Ghost was not built to withstand lunar night — the frigid, roughly two-week-long period when most of the moon's visible surface is in shadow, with temperatures dropping as low as minus 148 degrees Fahrenheit.
As well as capturing stunning photos, the lander collected extensive data on how space weather and other cosmic forces may impact our planet. "Teams are eagerly analyzing their data, and we are extremely excited for the expected scientific findings that will be gained from this mission," Kearns said in a statement on Tuesday (March 18).
The Blue Ghost lunar lander launched from NASA's Kennedy Space Center on Jan. 15 as part of NASA's Commercial Lunar Payload Services (CLPS) initiative. The lander delivered 10 scientific and technological instruments to the Mare Crisium basin on the near side of the moon, which NASA said is the largest payload a CLPS delivery mission has ever carried.
These instruments include the deepest robotic planetary subsurface thermal probe ever made, according to NASA, an x-ray imager to study the interactions between solar winds and Earth's magnetic field, and a subsurface probe based on electric and magnetic fields capable of taking measurements at depths of up to 700 miles (110 kilometers).
"The science and technology we send to the Moon now helps prepare the way for future NASA exploration and long-term human presence to inspire the world for generations to come," Nicky Fox, an associate administrator at NASA, said in a statement.
A Dyson Swarm Made of Solar Panels Would Make Earth Uninhabitable
A Dyson Swarm Made of Solar Panels Would Make Earth Uninhabitable
By Mark Thompson
Artist's illustration of a Dyson Swarm. (Credit: Archibald Tuttle)
As civilisations become more and more advanced, their power needs also increase. It’s likely that an advanced civilisation might need so much power that they enclose their host star in solar energy collecting satellites. These Dyson Swarms will trap heat so any planets within the sphere are likely to experience a temperature increase. A new paper explores this and concludes that a complete Dyson swarm outside the orbit of the Earth would raise our temperature by 140 K!
The concept of a Dyson swarm is purely a hypothetical concept, a theorised megastructure consisting of numerous satellites or habitats orbiting a star to capture and harness its energy output. Unlike the solid shell of a Dyson sphere, a swarm represents less of an engineering challenge, allowing for incremental construction as energy needs increase. The concept, first popularised by physicist Freeman Dyson in 1960, represents one of the most ambitious yet potentially achievable feats of astroengineering that could eventually allow a civilisation to use a significant fraction of its host star's total energy output.
Freeman Dyson.
Whilst presently only the stuff of theory and science fiction, it has inspired real scientific research. It’s an idea that presents a potential solution for the enormous energy needs as we take tentative steps toward travel beyond our Solar System. If we, or any advanced civilisations that might be out there succeed, then they would be classed as Type II on the Kardashev scale. The scale is used to articulate a civilisation’s level of technological advancement based on the amount of energy it is capable of harnessing and using.
Dyson swarm structures are likely to use photovoltaic technology to convert stellar radiation into usable energy. Their efficiency in energy conversion is highly dependent on the temperature of the solar cells and, unlike Earth-based equivalents, must balance thermal exchanges with the Sun, outer space and the enormous surface area of their structure. Temperature regulation of the structure is one of the challenges that must be overcome since they must remain cool for optimal operation.
Artist illustration of a Dyson sphere under construction
It’s not just the temperature of the structures that poses problems asserts Ian Marius Peters from the Helmholtz Institute Erlangen-Nurnberg for Renewable Energy. In his paper published in Science Direct, he explores the environmental changes of planets within a swarm or sphere. The research examines whether such a megastructure could be built using materials available in our Solar System while still preserving Earth's habitability, balancing the goal of stellar energy capture with the need to maintain conditions that support life on our planet.
The paper concludes that a Dyson sphere surrounding the Sun would significantly impact Earth's climate. Small spheres positioned inside Earth's orbit prove impractical, either becoming too hot for their own efficiency or having to great an impact on solar energy arriving on our planet. While large spheres enable efficient energy conversion, they would raise Earth's temperature by 140 K making Earth completely uninhabitable. A compromise might involve creating a partial structure (the Dyson swarm) at 2.13AU from the Sun. This would harvest 4% of solar energy (15.6 yottawatts or 15.6 million billion billion watts) while increasing Earth's temperature by less than 3K—comparable to current global warming trends. It’s still quite an engineering feat though requiring 1.3×10²³ kg of silicon!
Bedmap3 is the most fine-grain map to date of the landscape beneath Antarctica's ice. Scientists created it using more than 60 years' worth of data from satellites, ships and dog-drawn sleds.
Researchers have unveiled the most detailed map of Antarctica's bedrock yet.
(Image credit: Pritchard et al., Scientific Data (2025). Creative Commons.)
Scientists have unveiled the most detailed map yet of the landscape hidden beneath Antarctica's ice.
The high-resolution map reveals what the frozen continent looks like beneath its miles-thick blanket of ice and snow, and will help researchers predict how Antarctica might evolvein a fast-warming climate.
"Imagine pouring syrup over a rock cake [or a chocolate chip cookie, if that's more familiar to you] — all the lumps, all the bumps, will determine where the syrup goes and how fast," Hamish Pritchard, a glaciologist at the British Antarctic Survey (BAS) and the lead author of a new study outlining the research, said in a statement.
The same process will occur in Antarctica if a significant amount of the ice sheet melts, Pritchard said. "Some ridges will hold up the flowing ice; the hollows and smooth bits are where that ice could accelerate," he said.
Bedmap3 builds on two previous studies that digitally stripped Antarctica of its ice. The new map incorporates all of the data used for Bedmap1 and Bedmap2 — including measurements gathered by planes, satellites, ships and even dog-drawn sleds. But the team also sourced an extra 52 million data points to refine these previous results, according to the study, published March 10 in the journal Scientific Data.
In total, more than six decades' worth of data was compiled to construct Bedmap3, the researchers said in the statement. "This is the fundamental information that underpins the computer models we use to investigate how the ice will flow across the continent as temperatures rise," Pritchard said.
The new map is color coded to show the height of Antarctica's bedrock above sea level, highlighting the continent's tallest mountains and deepest valleys. The topography is revealed in the finest detail yet, providing new insight into understudied areas, including around the South Pole, according to the statement.
Bedmap3 shows the topography of Antarctica beneath the ice sheet. (Image credit: Pritchard et al. Scientific Data (2025). Creative Commons.)
The researchers used radar, seismic and gravity measurements to map the bedrock and estimate the thickness of the ice sheet above it. Against their expectations, they found that the place with the thickest ice in Antarctica is an unnamed canyon in Wilkes Land, a district in the east of the continent.
Previous surveys placed Antarctica's thickest ice in the Astrolabe Basin in Adélie Land. The difference in ice thickness between the two areas is small: The Astrolabe Basin has a thickness of around 2.9 miles (4.7 kilometers), while Wilkes Land is almost 3 miles (4.8 km) thick, according to the study.
At its thickest point, the ice sheet in Antarctic is almost 3 miles (4.8 kilometers) thick. (Image credit: British Antarctic Survey (BAS))
The new research also reveals, in unprecedented detail, the shape of the ice sheet and ice shelves that float around the fringes of the continent.
"In general, it's become clear the Antarctic Ice Sheet is thicker than we originally realized and has a larger volume of ice that is grounded on a rock bed sitting below sea level," study co-author Peter Fretwell, a mapping specialist and geographic information officer at the BAS, said in the statement.
Although thickness in itself is not a problem, the fact that much of the ice sits below sea level is concerning, because relatively warm seawater can flood into the ice sheet, Fretwell said. "This puts the ice at greater risk of melting," he added.
"What Bedmap3 is showing us is that we have got a slightly more vulnerable Antarctica than we previously thought," Fretwell added.
NASA's stranded astronauts are finally on their way home after a brutal nine months in space.
After months of tense anticipation, Sunita Williams and Barry 'Butch' Wilmore undocked from the International Space Station(ISS) at 1.05am ET (5.05am GMT) on the Dragon spacecraft made by Elon Musk's SpaceX.
The pair, along with NASA's Nick Hague and Russia's Aleksandr Gorbunov, will now make the 17 hour descent back to Earth and, if all goes according to plan, should splash down off the coast of Florida at 5.57pm ET (9.57pm GMT).
'Crew nine is going home,' Hague, the commander of departing Crew Dragon, said from the spacecraft moments after they began their journey.
'On behalf of crew nine, it was a privilege to call space home... to live and work... in cooperation for the benefit of humanity. To our colleagues and dear friends who remain on the station, we know the station is in great hands. We're excited to see what you guys are going to accomplish and we'll be waiting for ya [sic].'
NASA livestreamed the extraordinary mission, documenting every key development from the moment the duo were secured in the spacecraft and the hatch door was closed - which took place two hours prior to departure.
Wilmore was strapped in on the far left of the hatch with Williams secured on the far right, both blowing kisses at the screen as the reality set in that they were finally returning home.
Wilmore was strapped in on the far left of the hatch with Williams secured on the far right
They were both blowing kisses at the screen as the reality set in that they were finally returning home
Pictured: SpaceX Dragon capsule 'Freedom' docked at the International Space Station ahead of take off
Williams and Wilmore are returning to Earth in SpaceX 's Crew-9 Dragon capsule, which was already docked to the ISS. The pair will be accompanied by NASA's Nick Hague and Russia 's Aleksandr Gorbunov, who flew to the space station in the Crew-9 Dragon in September
Those specks needed to be entirely removed - which Onishi did - before takeoff to ensure the seal remained air tight.
Beyond that, all systems were reported working smoothly and the space suits had passed the required leak test, with forecast clear skies and 'pristine weather' ahead of splashdown on Tuesday.
The duo are unlikely to be able to walk on their own and will almost certainly be stretchered to the hospital, making for dramatic scenes.
Williams and Wilmore were only supposed to spend eight days on the floating laboratory when they launched aboard Boeing's Starliner spacecraft on June 5.
But numerous technical issues with their ship, including thruster failures and helium leaks, drove NASA to send Starliner home without its crew in September.
Their unexpectedly long space mission became a political flashpoint following comments from President Donald Trump and Musk, who both said the Biden administration 'abandoned' the Starliner crew in space for 'political reasons.'
During a February appearance on Joe Rogan's podcast, Musk claimed he offered to bring the pair home eight months ago, but the Biden Administration shot it down because it would have made Trump 'look good' in the presidential race against Kamala Harris.
NASA livestreamed the extraordinary mission, documenting the moment the Dragon unhooked and began its return to Earth
'Crew nine is going home,' commander Hague said from the aircraft moments after they began their journey
Butch Wilmore and Sunita Williams were original scheduled for an eight-day mission, but were forced to stay after technical issues plagued the Boeing's Starliner that brought them to the ISS
The pair are joined by NASA's Hague and Russia's Gorbunov, who flew to the space station in the Crew-9 Dragon in September.
Four new astronauts have taken their place after arriving on the ISS over the weekend. The incoming Crew-10 is composed of NASA astronauts Anne McClain and Nichole Ayers, Japan's Takuya Onishi, and Russia's Kirill Pesko.
Typically, a departing ISS crew shares the space station with the incoming crew for about five days in what's known as a 'handover period.'
This allows them to get the new crew up to speed on space station operations and ensures a smooth transition between teams.
But this time, NASA decided to shorten the handover period to just two days to conserve food on the ISS and open up more undocking opportunities for the Starliner crew in case the weather interferes with their targeted return date.
When they splash down on Tuesday, the frail duo will be placed on stretchers and immediately taken for medical evaluations.
NASA is due to give a press conference at 7.30pm ET (11.30pm GMT) and it is highly unlikely the astronauts will attend.
The duo were in high spirits as they prepared to farewell the space station
Stranded NASA astronauts begin journey back to Earth
Dr Vinay Gupta, a pulmonologist and Air Force veteran told DailyMail.com the crew will begin their rehabilitation program the very same day they return to Earth, with the first phase focusing on walking, flexibility and muscle strengthening.
The astronauts could need up to six weeks of rehabilitation to regain their strength, which will include guided exercise and a nutritional plan, he added.
The duo have been praised for their work under less-than-ideal conditions in the space station.
They completed 4,500 orbits while stranded for 286 days.
There was a slight mishap as Takuya Onishi, one of four new astronauts replacing Williams and Wilmore, reported finding specks of dust on the hatch seals between the craft and the space station
Pictured: The moment the SpaceX Dragon capsule undocked from the station with the astronauts on board
Before the president's request, the astronauts were not coming back earlier than March 26.
NASA officials have not directly addressed these claims, but during a press briefing earlier this month, one of its senior administrators shed light on the situation.
Ken Bowersox, associate administrator of the agency's Space Operation Mission Directorate, said SpaceX has been working with NASA to develop a backup return plan for the Starliner mission since last July.
'The SpaceX folks helped us with a lot of options for how we would bring Butch and Suni home on Dragon in a contingency,' Bowersox said.
He also admitted that there 'may have been conversations' in the White House about delaying the return for political reasons, but he was not part of the discussions.
The mission was only meant to take eight days, but the Boeing Starliner capsule which delivered them to the ISS encountered so many problems that NASA insisted it come back empty, leaving its test pilots behind to wait for a SpaceX lift.
The incoming Crew-10 is composed of NASA astronauts Anne McClain and Nichole Ayers, Japan 's Takuya Onishi, and Russia 's Kirill Pesko
The new crew from the SpaceX capsule will spend the next six months at the space station, which is considered the normal stint.
Their arrival comes after several setbacks for the relief mission, the most recent of which saw the flight scrapped at the eleventh hour on Wednesday, due to a hydraulic system issue with the Falcon 9 rocket.
Most people have at least a few embarrassing photos from their early childhood - and the universe is no different.
Scientists from the Atacama Cosmology Telescope (ACT) collaboration have reevaled the 'baby pictures' of the cosmos, revealing the clearest images of the universe's infancy.
These stunning images measure light that has travelled for more than 13 billion years to reach Earth, showing the universe as it was just 380,000 years after the Big Bang.
That is the earliest cosmic time accessible to humanity and is equivalent to a baby photo taken just hours after birth.
This has given scientists their best look yet at the Cosmic Microwave Background (CMB) - the leftover radiation from the Big Bang which fills the entire observable universe.
What looks like clouds of light are actually hills and valleys light-years across in the boiling sea of hydrogen and helium which filled the early universe.
Over millions to billions of years, these more or less dense regions were pulled together by gravity to form the structure of the universe we see today.
Professor Suzanne Staggs, a physicist from Princeton University and director of the ACT, says: 'We are seeing the first steps towards making the earliest stars and galaxies.'
Scientists have revealed the 'baby pictures' of the cosmos, showing how the Universe appeared just 380,000 years after the Big Bang. This image shows the vibration directions of the radiation produced by helium and hydrogen for the first time
On the left is part of the new half-sky image from the Atacama Cosmology Telescope. Three wavelengths of light have been combined together to highlight the Milky Way in purple, and the cosmic microwave background in grey
After the Big Bang, the cosmos was filled with a superheated soup of plasma.
For the first few hundred thousand years, that plasma was so dense that light couldn't move through it, making the universe essentially opaque.
The CMB is essentially the fossilised heat of the infant universe, allowing scientists to see the cosmos at its very first observable moment.
To capture an image of that extraordinarily faint signal, scientists at the ACT used a very sensitive telescope to take a photograph of space with a five-year exposure time.
In 2013, the Planck space telescope captured the first high-resolution images of the CMB, but those captured by the ACT reveal even more detail.
Dr Sigurd Naess, a researcher at the University of Oslo and a lead author of a paper related to the project, says: 'ACT has five times the resolution of Planck, and greater sensitivity.'
These images show the Cosmic Microwave Background (CMB), the oldest energy observable in the universe. The scientists' observations are even more detailed than those captured by the Plank space telescope from 2013 onwards (pictured)
To record the extremely faint light from the Big Bang the researchers used the sensitive Atacama Cosmology Telescope in Chile to take an image of the sky with a five-year exposure time
These images don't just show the light and dark areas within the CMB but also capture the polarisation - the direction of oscillation - of light in the early universe.
This polarisation allows the researchers to actually see the movements of the helium and hydrogen gases.
Professor Staggs says: 'Before, we got to see where things were, and now we also see how they're moving.
'Like using tides to infer the presence of the moon, the movement tracked by the light’s polarization tells us how strong the pull of gravity was in different parts of space.'
The subtle variations in density and movement are what would go on to determine the formation of the first galaxies and stars as the clouds of gas collapsed into themselves under gravity.
Just as you might learn more about how someone grew up by looking at their baby photos, these images are also helping scientists unpack the development of the universe.
Professor Jo Dunkley, an astrophysicist from Princeton University and ACT analysis leader, says: 'By looking back to that time when things were much simpler, we can piece together the story of how our universe evolved to the rich and complex place we find ourselves in today.'
By studying these images, the researchers have confirmed that the observable universe extends almost 50 billion light-years in every direction around us.
This cosmological sky map shows the levels of radiation in the very earliest moments of the universe. Orange areas show more intense energy and blue shows less intense, revealing the different areas of density in the cosmos. The zoomed-in portion shows an area of sky 20 times the moon's width as seen from Earth
The standard model of cosmology suggests that the universe started off expanding rapidly, then slowed down thanks to the gravitational pull of so-called dark matter — before finally speeding up again thanks to the mysterious force of dark energy
What is the standard model of cosmology?
The standard model of cosmology is the conventional wisdom about the underlying physics of the universe.
Often called the Lambda-CDM theory, this suggests the universe has three major components: matter, dark matter, and dark energy.
This explains the existence and pattern of the cosmic microwave background, the lingering echo of the Big Bang, and the distribution of galaxies.
However, it doesn't align with new observations of the Universe's rapidly accelerating expansion.
These findings also show that the universe contains as much mass as 1,900 'zetta-suns', a unit equivalent to 10^21 suns, or almost two trillion times the mass of our sun.
Of those 1,900 zetta-suns, conventional matter, which we can see and observe, makes up just 100.
Of the conventional matter in the Universe, almost three-quarters is hydrogen and around a quarter is helium.
These new images have also helped scientists confirm the age of the universe.
As matter in the early universe collapsed in on itself it produced soundwaves which spread out through space like ripples on a pond.
By measuring how big those ripples appear in the CMB image, scientists are able to work out how far the light has travelled to reach the telescope and, therefore, how long ago the Big Bang occurred.
Professor Mark Devlin, ACT deputy director and astronomer at the University of Pennsylvania, says: 'A younger universe would have had to expand more quickly to reach its current size, and the images we measure would appear to be reaching us from closer by.
These latest measurements of the CMB show that the universe's expansion has accelerated since the Big Bang. The lack of a rival theory that fits with the ACT data suggests that the current standard model of cosmology is still the best explanation
'The apparent extent of ripples in the images would be larger in that case, in the same way that a ruler held closer to your face appears larger than one held at arm’s length.'
The ACT's new measurements confirm that the universe is 13.8 billion years old, with an uncertainty of only 0.1 per cent.
Additionally, these new images have helped to support the standard cosmological model, our current best theory about the universe's formation, by measuring the speed of the universe's expansion.
By comparing their findings to other possible models, the researchers found that no other explanation would fit the data better than the current standard model.
Dr Colin Hill, assistant professor at Columbia University and lead author of one of the new papers, says: 'We wanted to see if we could find a cosmological model that matched our data and also predicted a faster expansion rate.
'We have used the CMB as a detector for new particles or fields in the early universe, exploring previously uncharted terrain. The ACT data show no evidence of such new signals.'
Dark energy is a phrase used by physicists to describe a mysterious 'something' that is causing unusual things to happen in the universe.
The universe is full of matter and the attractive force of gravity pulls all matter together.
Then came 1998 and the Hubble Space Telescope observations of very distant supernovae that showed that, a long time ago, the universe was actually expanding more slowly than it is today.
The universe is not only expanding, but it is expanding faster and faster as time goes by,' Dr Kathy Romer, scientist at the Dark Energy Survey told MailOnline, as illustrated in this Nasa graphic
So the expansion of the universe has not been slowing due to gravity, as everyone thought, it has been accelerating.
No one expected this, no one knew how to explain it. But something was causing it.
'The universe is not only expanding, but it is expanding faster and faster as time goes by,' Dr Kathy Romer, scientist at the Dark Energy Survey told MailOnline.
'What we'd expect is that the expansion would get slower and slower as time goes by, because it has been nearly 14 billion years since the Big Bang.'
Uranus Is Hiding More Heat Than Scientists Ever Expected
Uranus Is Hiding More Heat Than Scientists Ever Expected
This breakthrough not only changes what we know about Uranus but also raises new questions about its past, its atmosphere, and the violent event that may have shaped its evolution.
For decades, Uranus stood out as the oddball among the gas giants, seemingly lacking the internal heat that its planetary neighbors generate. However, two independent research teams (the studies are available here and here) have now revealed that Uranus is actually emitting more heat than previously believed, challenging long-standing assumptions based on data from Voyager 2’s 1986 flyby. The findings, which are currently undergoing peer review, suggest that Voyager may have captured an unusual moment in Uranus’s orbit, leading scientists to the wrong conclusion about the planet’s internal dynamics.
This breakthrough not only changes what we know about Uranus but also raises new questions about its past, its atmosphere, and the violent event that may have shaped its evolution.
Uranus’s Heat Mystery Just Got Even More Puzzling
Planets generate heat through three main sources:
Leftover formation heat – energy trapped from the planet’s formation.
Radioactive decay – energy released as elements inside the planet break down.
Solar radiation – heat from the Sun, which varies based on a planet’s distance.
For years, Voyager 2’s observations suggested that Uranus was missing the excess heat seen in Jupiter, Saturn, and Neptune, making it an anomaly in the solar system. Scientists speculated that Uranus lacked sufficient radioactive elements, meaning it had cooled more than expected. But this didn’t sit well with many researchers—especially given how similar Uranus and Neptune are in size, mass, and composition.
Now, new infrared data from advanced telescopes tell a different story.
The Latest Observations Flip the Script
Professor Patrick Irwin from the University of Oxford and his team analyzed observations from the Hubble Space Telescope, Gemini North, and NASA’s Infrared Telescope Facility spanning nearly a decade. They wanted to see how Uranus’s heat signature changed
At the same time, Xinyue Wang and a team from the University of Houston took a broader approach, compiling decades of Uranus observations dating back to the mid-20th century. They used modern instruments to refine older data, tracking how Uranus’s heat fluctuates across its entire 84-year orbit around the Sun.
Both teams arrived at a strikingly similar conclusion: Uranus does emit more heat than Voyager 2 reported. The difference likely comes down to timing—Voyager 2 passed Uranus near its solstice, meaning seasonal variations in the planet’s heat output may have given a misleading impression of its true energy balance.
Uranus and Neptune. Credit: NASA
Just How Much Heat Is Uranus Giving Off?
Both teams calculated that Uranus radiates between 12.5% and 15% more heat than it absorbs from the Sun. While this is still far less than Neptune—whose internal heat emission more than doubles the energy it receives—it’s clear that Uranus is not the cold, lifeless world we once thought.
“This finally puts Uranus back in line with the other gas giants,” Irwin told ScienceNews. However, even with this adjustment, Uranus remains an outlier, raising fresh questions about why its heat output is so much lower than its planetary neighbors.
What’s Causing Uranus’s Low Heat Emission?
One leading theory suggests that Uranus’s violent past is to blame. Scientists believe the planet was struck by a massive object early in its history, tilting it completely onto its side. This extreme tilt may have trapped heat deep within the planet, preventing it from escaping at the same rate as the other gas giants.
Wang’s team emphasized that further investigation is needed, stating:
“The Uranus flagship mission, as recommended by the recent decadal survey, will provide crucial observations to address unresolved questions and advance our understanding of this enigmatic ice giant.”
A dedicated mission to Uranus would provide the definitive answers that scientists are searching for, but time is running out. If launched in 2032, a spacecraft could use a gravity assist from Jupiter to drastically reduce both travel time and mission costs. However, with limited funding for planetary exploration, there’s no guarantee that such a mission will move forward in time. For now, scientists will continue observing Uranus with the most advanced telescopes available, hoping to refine their models and unlock more of the planet’s hidden secrets.
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Supervolcano eruption on Jupiter's Moon Io but how extreme was it?
Supervolcano eruption on Jupiter's Moon Io but how extreme was it?
Io, Jupiter’s famous volcanic moon, is already the most volcanically active place in the solar system. But between Halloween and Christmas of 2024, something happened that was extreme, even by Io’s standards.
Its south pole erupted in a way astronomers weren’t even sure was possible. A super volcano exploded with such force that it was visible from space as a massive dark blotch in the atmosphere. In infrared, the eruption was so intense that it saturated scientific sensors.
How Big Was This Eruption? To grasp the scale, imagine Io were the size of Earth. This super volcano would cover an area larger than Texas, larger than Egypt. The aftermath would trigger a global volcanic winter lasting years, possibly decades.
The eruption unleashed energy equivalent to 260 Yellowstone's and its lava field could bury everything from New York to Kansas under 10 feet of molten rock or stretch from the Gulf of Mexico to the Great Lakes. Every minute, the eruption released energy equal to 1.5 million Hiroshima bombs.
Just think about this: Earth’s most devastating volcanic event, the Siberian Traps eruption, lasted for a million years and led to one of the worst mass extinctions in history. Io’s super volcano, at its current rate, would surpass that in just 800 years. Over a million years, it could spew out the equivalent of 1% of Earth’s entire mantle. If the volume of this eruption were spread evenly across Earth, our planet’s landscape would be completely transformed in a matter of days.
Even in a solar system filled with astonishing phenomena, Io continues to shock and surprise us.
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In the early hours of Tuesday morning, Suni Williams and Butch Wilmore boarded a SpaceX Dragon capsule docked at the International Space Station and began their journey back to Earth. Joining Williams and Wilmore for the voyage are the two spacefarers of a mission known as Crew-9, who in September arrived at the orbital laboratory aboard that particular Dragon spacecraft.
Astronauts stuck in space finally return to Earth
Later Tuesday evening, the Dragon carrying the four astronauts – including NASA astronaut Nick Hague and Roscosmos cosmonaut Aleksandr Gorbunov – is due to splash down off the Florida coast.
In that time, the pair of experienced astronauts have become near-household names, with their ordeal capturing public fascination and later becoming politicized when President Donald Trump decided to weigh in.
But the stage was finally set for Wilmore and Williams to embark on their long-awaited return trip with the arrival Saturday of the Crew-10 astronauts, who have now replaced the outgoing Crew-9 mission aboard the space station.
What time will Starliner, Crew-9 astronauts splash down?
The SpaceX Dragon Freedom spacecraft departs early Tuesday morning from the International Space Station. Aboard are the four Crew-9 members, who since September have included Butch Wilmore and Suni Williams, who piloted the Boeing Starliner.
The departure of the Starliner astronauts with Crew-9 is a little earlier than expected after NASA initially announced that the four spacefarers wouldn't head back to Earth any earlier than Wednesday.
But after examining weather forecasted off the Florida coast, NASA and SpaceX opted to bump up the return date to when conditions should be better for the Dragon's landing.
The Dragon Freedom capsule undocked right on schedule at around 1:05 a.m. EDT Tuesday from the ISS Harmony module, a port and passageway onto the station. The astronauts are now on about a 17-hour voyage back to Earth, where they are expected to make a water landing at about 5:57 p.m. EDT off the Florida coast, according to NASA.
As it did for the undocking, NASA will provide a livestream of the landing on its streaming service NASA+. Coverage is expected to begin at 4:45 p.m.
NASA’s SpaceX Crew-9 members pose together for a portrait inside the SpaceX Dragon crew spacecraft docked to the International Space Station. From left, are NASA astronaut Suni Williams, Roscosmos cosmonaut Aleksandr Gorbunov, and NASA astronauts Nick Hague and Butch Wilmore.
What happened with the Boeing Starliner?
As the two NASA astronauts selected for the first crewed test flight of Boeing's Starliner, Wilmore and Williams arrived in June at the space station for what was meant to be a brief orbital stay.
NASA astronauts Butch Wilmore and Suni Williams walk June 1 at NASA's Kennedy Space Center. The experienced astronauts ended up launching June 5 on the Boeing's Starliner's first crewed flight test mission.
That was before NASA and Boeing engineers discovered a slew of technical issues with the spacecraft, including helium leaks and propulsion problems. Instead of departing on the spacecraft that bore them to the space station, Wilmore and Williams had no choice but to watch as the the troubled Starliner undocked in September to head back to Earth without them.
NASA ultimately decided to keep Williams and Wilmore at the station for a few extra months rather than launch an emergency mission to return them to Earth in order to keep the space station fully staffed. In September, the space agency launched the SpaceX Crew-9 mission with two astronauts instead of four to leave two empty seats reserved for Wilmore and Williams.
For their part, the astronauts have regularly spoke about relishing the extra time in the cosmos, including in an exclusive interview in January with USA TODAY. Wilmore and Williams have also sought to dispel the notion that they are "stuck" at the station, insisting that the extended stay is all part of the job.
"We came up prepared to stay long, even though we planned to stay short," Wilmore said earlier this month in a news conference with journalists from the station.
Boeing and NASA teams work around NASA's Boeing Crew Flight Test Starliner spacecraft after it landed Sept. 6, 2024 without its crew at White Sands, New Mexico.
Trump, Musk weigh in on Starliner saga
The Starliner astronauts' insistence that they are not in distress at the space station hasn't stopped their unexpectedly long stay from becoming politically charged.
Since Trump took office, he and SpaceX CEO Elon Musk have made assertions that the vehicle's crew were "abandoned" or "stuck" in space as a result of the Biden Administration. Trump also recently claimed that it was he who "authorized" Musk to retrieve the astronauts, despite the return plan being in place before he was elected.
Wilmore was diplomatic about Trump and Musk earlier this month when reporters asked multiple questions about their claims.
“The words they said, well, that’s politics. I mean, that’s part of life,” Wilmore said during the news conference. “From my standpoint, politics has not played into this at all.”
Crew-10 begins mission at International Space Station
Members of the newly arriving SpaceX Crew-10 join with the Expedition 72 crew aboard the International Space Station for a brief ceremony shortly after docking on Sunday morning.
The crew, under the command of NASA astronaut Anne McClain, includes NASA pilot Nichole Ayers and two mission specialists from other space agencies: Japanese astronaut Takuya Onishi of the Japan Aerospace Exploration Agency (Jaxa) and Roscosmos cosmonaut Kirill Peskov.
After a two-day delay, the Crew-10 mission launched Friday night from NASA's Kennedy Space Center, with a SpaceX Falcon 9 rocket propelling the astronauts into orbit aboard a Dragon capsule. Once separated from the rocket, the Dragon Endurance, which has flown on SpaceX crew mission before, used its own thrusters to autonomously power on to the space station.
Before the outgoing astronauts departed the station, they spent a few days helping the new arrivals familiarize themselves with the orbital laboratory and station operations during a handover period. Ayers, McClain, Onishi and Peskov will soon be part of Expedition 73 and will remain at the station for about six months on a rotation conducting scientific experiments.
The SpaceX crew missions are contracted under NASA's commercial crew program, which allows the U.S. space agency to pay SpaceX to launch and transport astronauts and cargo to orbit aboard the company's own vehicles. The Boeing Starliner is meant to one day become a second operational vehicle for NASA under the program, though its path toward certification remains fraught after its botched inaugural crewed flight test.
Eric Lagatta covers breaking and trending news for USA TODAY. Reach him at elagatta@gannett.com
Exploding Stars May Have Caused Two of Earth's Mass Extinctions
Exploding Stars May Have Caused Two of Earth's Mass Extinctions
By Evan Gough
Artist’s impression of a Type II supernova. New research shows that two of Earth’s most perilous extinctions were caused by nearby supernovae explosions. Image credit: NASA / ESA / G. Bacon, STSci.
Nothing can withstand a powerful supernova explosion. Only distance can dull their power, and that distance is measured in light years. New research suggests that two of Earth's most devastating mass extinctions were caused by supernova explosions within 65 light-years of Earth.
The pair of mass extinctions attributed to SN explosions are the Late Devonian and the Late Ordovician extinction events. They are two of Earth's five largest mass extinctions.
"If a massive star were to explode as a supernova close to the Earth, the results would be devastating for life on Earth. This research suggests that this may have already happened." - study co-author Dr. Nick Wright from Keele University
The Late Devonian extinction occurred roughly between 372 million and 359 million years ago and wiped out between 70% to 80% of marine species. It wasn't a single event but rather a sequence of small extinctions that played out over a long period of time. The extinction's exact time span and consequences are still being pieced together. Scientists think it involved changes in ocean levels and ocean anoxia triggered by a cooling climate and undersea volcanoes.
The Late Ordovician occurred roughly 445 million years ago when about 85% of marine species were wiped out. It occurred in two pulses. In the first pulse, the Earth changed from a greenhouse climate to an icehouse climate. In the second, the oceans were severely depleted of oxygen.
The research doesn't identify specific supernovae behind these extinctions. Supernova remnants only last for a few hundred thousand years before they dissipate and fade into the background. Instead, the researchers took a census of supernova progenitors called OB stars. OB stars are massive and hot and tend to end their lives as supernova explosions.
The short-lived nature of supernovae remnants means individual historic SN from hundreds of millions of years ago can't be tracked down. In this research, the team took a different approach. By taking a census of OB stars within 1 kiloparsec (3261.56 light-years) of our Solar System, the researchers hoped to build an understanding of how star clusters and galaxies form. As a side result, they calculated the rate of SN explosions.
This is a false colour image of Cassiopeia A (Cas A), a supernova remnant from an explosion about 11,000 years away and about 340 years ago from Earth's perspective. As the material in the remnant expands and cools, it will become indistinguishable from the interstellar medium.
Image Credit: NASA/Hubble/Spitzer/Chandra
The astronomers used the spectral energy distribution (SED) of the populations of OB stars to determine their ages. They also used the surface density star formation rate to understand how efficiently regions in the galaxy convert their gas and dust into stars.
"We have characterized and mapped 24,706 O- and B-type stars within 1 kpc of the Sun," the authors write in their paper. They also write that they "exploited our list of OB stars to estimate...a local core-collapse supernova rate of ~15–30 per Myr."
This figure from the research shows the surface density of the SED-fitted OB stars in Galactic Cartesian coordinates. The black circle shows the 24,706 stars within 1 kpc. Some known star-forming regions and complexes are labelled.
Image Credit: Quintana et al. 2025.
From there, they determined that there are 0.4–0.5 core-collapse SN per century, which is slightly lower than that shown by previous research. " Our extrapolated ccSN rates of 0.4–0.5 per century are notably lower than most previous estimates due to a combination of the smaller size of our OB catalogue and improved stellar evolutionary models," the authors explain.
"We calculate a near-Earth core-collapse supernova rate of ~2.5 per Gyr that supports the view that nearby supernova explosions could have caused one or more of the recorded mass extinction events on Earth," they write. They argue that their ccSN rate "is consistent with the rate of historical mass extinction events on Earth that are linked to ozone depletion and mass glaciation."
"Supernova explosions are some of the most energetic explosions in the Universe," said study co-author Dr. Nick Wright from Keele University. "If a massive star were to explode as a supernova close to the Earth, the results would be devastating for life on Earth. This research suggests that this may have already happened."
The Universe acts like a great recycler in some respects, and massive exploding stars are part of it. When they explode, they forge elements heavier than hydrogen and helium and spread them out into space. These elements are critical for rocky planets to form and for life to appear. The powerful shock waves from SN also compress the interstellar medium and can trigger another round of star formation.
However, planets too close to an SN explosion are doomed. The explosion can strip away atmospheres and expose anything living on the surface to deadly radiation.
"It is a great illustration for how massive stars can act as both creators and destructors of life," said lead author Quintana in a press release. "Supernova explosions bring heavy chemical elements into the interstellar medium, which are then used to form new stars and planets. But if a planet, including the Earth, is located too close from this kind of event, this can have devastating effects."
We may never find the exact causes of Earth's ancient extinctions. They were too long ago, and the evidence is scant. But we know that stars explode and that the explosions can have devastating effects. Even from a distance, a supernova's cosmic rays can ionize the atmosphere and trigger cloud formation that can cool the climate. Their powerful UV radiation could destroy the ozone and also create more aerosols that add to global cooling.
Astrophysicists have tried to determine how close a supernova has to be to Earth to destroy the biosphere. Early estimates were about 25 light-years, while later estimates were closer to 50 light-years. There are no known supernova progenitors within 50 light-years, and the nearest eventual SN astronomers have identified is Betelgeuse, which is about 600 light-years away. We're safe for now.
When it comes to supernova extinctions, there is no certainty and a lot of debate. We may never know if supernovae were behind the Late Devonian and the Late Ordovician mass extinctions.
However, we do know that we live inside a great mystery where massive exploding stars could have changed the course of life on Earth. Supernovae can both annihilate life on existing worlds and help create the conditions for it to appear on new rocky planets. They can also wipe the slate nearly clean and make room for new types of life.
What Will the Betelgeuse Supernova Be Like - And Will It Hurt Us?
What Will the Betelgeuse Supernova Be Like - And Will It Hurt Us?
By Paul Sutter
Artist’s conception of a red giant star. Credit: Royal Astronomical Society/ ESO/ L. Calçada.
When Beetlejuice goes off, it's going to be the show of a lifetime. But it’s not going to hurt us.
Betelgeuse is the shoulder of Orion, a red giant sitting about 500 light years away. It’s huge, weighing somewhere between 15-20 solar masses, but so extended and bloated that if you plopped it down in our own solar system, it would stretch to roughly the orbit of Mars.
And it's not doing so great. Massive stars do not live very long lives, with their precise lifetimes depending on a host of factors like their mass, their metallicity, and spin rate. On the low side, we're talking only a few hundred thousand years. On the high side, we've got a few million.
But either way, as stars go, that's not a lot. Our own Sun will outlive multiple generations of such giants, and red dwarfs, the smallest stars in the universe, can stretch for trillions of years at a time. In fact, just a fun side note, red dwarfs live for so long that the entire universe isn't even old enough for them to start dying yet.
No matter how you slice it, Betelgeuse is on its last legs.
It's in what's called the red giant phase, and it's pretty obvious to see why astronomers picked that name for this phase in a stellar life cycle. It's red, and it's gigantic. And it is so close to being dead that it is in an incredibly unstable phase. In fact, we saw some very dramatic dimming episodes a few years ago where it dimmed by around 15% out of nowhere over the course of a few weeks. And then just after a few months, it popped back up to full brightness.
When a star is near the end of its life, it’s all chaos. Sometimes it's fusing hydrogen, sometimes it's fusing helium, sometimes it will shut down for a while, sometimes it'll start back up. The outer edges of the atmosphere are so far away from the central core that they start getting a mind of their own. It just gets complicated.
Estimates based on the mass of Betelgeuse, its rotation rate, the group of stars it was born with, and the amount of metals we can measure in the upper layers of its atmosphere, all suggest that it's somewhere in the neighborhood of a few hundred thousand years from now, it's going to go supernova. But honestly it could be tomorrow. In fact, because it's 500 light years away. It could have gone off a hundred years ago, and we won't find out for a while. It may already be dead.
When Betelgeuse goes off as a supernova, it will be a sight to behold. Keep in mind that typical supernova can outshine entire galaxies of over a hundred billion stars. And at a distance of a few hundred light years, Betelgeuse is going to put on an impressive show.
It will be visible during the day. It will be brighter than any planet. It will be almost as bright as the full moon. You'll be able to read a book by the light of the Betelgeuse supernova at midnight.
But it will actually be painful to look at because unlike the full moon that is this gorgeous disc in the sky, Betelgeuse is still going to be a tiny pinprick of light. So it won't be comfortable to look at, and it will last a few months before fading away as all supernovae do. But as impressive as it is, it won't be dangerous.
What saves us from most supernova dangers is that as bright as they are, as much radiation as they pour into the universe, stars are really stinking far apart. What helps here is something called the inverse square law. There's a fixed amount of light that a star or a supernova or any radiating object in the universe gives off.
And so that light moves away from the star, that same amount of light has to cover more and more area. If you double the distance, the radiation in any one spot gets cut to 25%. If you go to ten times the distance, then you get a factor of a 100 drop off. It goes as the square of the distance.
If you're trying to stay warm by a fire, you will notice if you stand really close to the fire that it’s maybe a little bit too hot, but then you take one step back, and all of a sudden, you’re cold again. That's because of that inverse square law of the infrared radiation being emitted by the fire. But in the case of a supernova, we're going to be grateful for the inverse square law. Because we're talking about a giant star turning itself into an uncontrolled nuclear bomb and detonating with enough energy to overwhelm an entire galaxy's worth of starlight.
From our perspective, Betelgeuse will go from a dot of light in the night sky to a brighter dot of light in the night sky. It's simply not going to be a threat.
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JWST Cycle 4 Spotlight, Part 1: Exoplanets and Habitability
JWST Cycle 4 Spotlight, Part 1: Exoplanets and Habitability
By Matthew Williams
Artist's illustration of JWST
The Space Telescope Science Institute (STScI) has announced the science objectives for Webb's General Observer Programs in Cycle 4 (Cycle 4 GO) program. The Cycle 4 observations include 274 programs that establish the science program for JWST's fourth year of operations, amounting to 8,500 hours of prime observing time. This is a significant increase from Cycle 3 observations and the 5,500 hours of prime time and 1,000 hours of parallel time it entailed.
These programs are broken down into eight categories, ranging from exoplanet habitability and the earliest galaxies in the Universe to supermassive black holes, stellar evolution, and Solar System astronomy. They were selected by the Cycle 4 Telescope Allocation Committee (TAC) in February 2025, which comprised two Executive Committee Chairs, 36 Panel Chairs and Vice Chairs, 183 Discussion Panelists, 315 External Panelists, and 220 Expert Reviewers.
In terms of exoplanet studies, the observation programs for Cycle 4 focus on exoplanet characterization, formation, and dynamics. In particular, the programs address ongoing questions about exoplanet habitability and the types of stars that can host habitable planets. For instance, program GO 7068, titled "Surveying Stellar Shenanigans: Exploring M dwarf Flares for Exoplanetary Insights," focuses on the question of red dwarf stars and the hazards posed by their flare activity.
The field of exoplanets has undergone a major transition in recent years. With over 5,800 confirmed candidates (5,849 as of the writing of this article), scientists are moving from the discovery process to characterization. This consists of obtaining spectra from exoplanet atmospheres to determine what chemical signatures are present. By detecting potential biosignatures (i.e., oxygen, carbon dioxide, water, methane, etc.), scientists can measure planetary habitability more accurately.
Interestingly, the JWST was not originally designed for exoplanet characterization. However, its extreme sensitivity to infrared (IR) wavelengths and advanced spectrometers mean that Webb can obtain transit spectra from exoplanets as they pass in front of their suns. Combined with its coronographs (which block out light from a system's star), it can also detect the faint light reflected by exoplanet atmospheres and surfaces.
Red Dwarfs
In the past decade, astronomers have detected numerous rocky planets orbiting nearby M-type (red dwarf) stars. Of the 30 potentially habitable exoplanets closest to Earth, 28 orbit red dwarf stars. This is particularly good news for astronomers and astrobiologists since red dwarf stars are the most common in the Universe and account for about 75% of stars in the Milky Way. What's more, research has indicated that there may be tens of billions of potentially habitable rocky planets orbiting red dwarf stars in the Milky Way.
On the other hand, red dwarf stars are also known for being variable and prone to significant flare activity compared to Sun-like stars. Recent studies have detected several "superflares" events from red dwarfs powerful enough to remove the atmospheres of any planets orbiting them. However, recent observations by the Transiting Exoplanet Survey Satellite (TESS) have shown that red dwarf stars tend to emit superflares from their poles, thus sparing orbiting planets.
Learning more about M-type stars and their effects on planetary habitability is the purpose of GO 7068, "Surveying Stellar Shenanigans: Exploring M dwarf Flares for Exoplanetary Insights." Dhvani Doshi, a PhD student at McGill University's Trottier Institute for Research on Exoplanets, is the principal investigator of this program. Using Webb's Near Infrared Imager and Slitless Spectrograph (NIRISS) instrument, the team will observe five active M-type stars for 5 to 10 hours each to obtain spectra as they transit in front of their stars.
They also anticipate recording 400 flare events with energies exceeding 10^{30} erg, or 6.24^42 electronvolts (ev). Per the program description:
"Through detailed analysis of flare properties and behavior in the NIR regime, our proposal aims to address critical gaps in our understanding of stellar flare phenomena on M dwarfs, refining existing models and enhancing our ability to interpret exoplanetary spectra in the presence of stellar activity."
Direct Imaging
As noted, Webb's advanced instruments also make it uniquely qualified for Direct Imaging studies. These involve observing exoplanets directly as they orbit their suns, which was previously restricted to massive planets with wide orbits. Thanks to Webb's extreme sensitivity and advanced instruments, Cycle 4 GO includes several programs that will conduct DI studies of nearby exoplanets.
This is the purpose of the GO 6915 program, titled "Direct Detection and Characterization of a Nearby Temperate Giant Planet." The Principal Investigator of this program is William Balmer, a Ph.D. candidate at Johns Hopkins University and the Space Telescope Science Institute (STScI). He and his colleagues propose directly imaging HD 22237 b using Webb's Near Infrared Camera (NIRCam) and Mid-Infrared Imager (MIRI) coronographs.
This nearby gas giant is about 37 light-years from Earth and is 5.19 Jupiter masses. As the team described in their proposal:
"These observations will constrain key atmospheric model uncertainties, like the strength of water-ice cloud opacity, the abundance of ammonia, and the strength of disequilibrium chemistry in the planet's atmosphere. This program is designed to efficiently detect the planet at high confidence, photometrically characterize the atmosphere, and refine the planet's sky-projected orbit ahead of Cycle 5; doing so will allow the community to estimate the feasibility of follow-up spectroscopy on the fastest timescale."
Another interesting program is GO 7612, "We can directly image super-Earth-sized planets near the habitable zone of Sirius B with JWST/MIRI." The PI for this program is Logan Pearce, a postdoctoral researcher from the University of Michigan. The team will conduct a direct imaging campaign using Webb's Mid-Infrared Imager and its coronagraph to search for super-earths and cold gas planets near the outer edge of Sirius B's habitable zone (HZ).
Located 8.7 light-years away, Sirius B - the companion star of Sirius A (an A-type main sequence white star) - is the closest white dwarf to the Solar System. For decades, scientists have wondered if white dwarf stars can support habitable planets. In recent years, research has indicated that planets would need to orbit closely to white dwarfs to be in their HZs. Similar to exoplanets that orbit M-type stars, rocky planets orbiting in the HZs of white dwarfs are likely to be tidally locked, with one side absorbing potentially dangerous levels of radiation.
"Our program holds the potential to detect rocky planets and cold (>70K) gas giants—a feat unlikely to be possible until the next generation of observatories comes online decades from now. If a planet-like signal is detected, follow-up proper motion measurements or spectroscopy will confirm its planetary nature and provide a detailed characterization of its physical and atmospheric properties. This program could be JWST's singular chance to directly image rocky planets in a nearby system, offering profound insights into planetary evolution around post-main sequence stars and in binary systems."
Rocky Exoplanets
In terms of exoplanet studies, Webb is also especially qualified for studying smaller, rocky planets that orbit more closely to their suns - which is where Earth-like planets are likely to reside. This presents astronomers with the exciting opportunity to examine Earth-like planets near the Solar System more closely. This includes the closest exoplanet to the Solar System, which is the purpose of the GO 7251 program, "Does Our Closest M-Dwarf Rocky Neighbor Have An Atmosphere? We Need to Find Out."
The rocky neighbor in question is LTT 1445A b, the nearest transiting rocky planet considered the most likely to have an atmosphere. The planet is a Super-Earth that orbits the primary star in a triple M-dwarf system located 22 light-years away. The planet's size (1.3 Earth radii and 2.73 Earth masses) and its equilibrium temperature (150.85 °C; 303.5 °F) are promising indications that it may have an atmosphere.
The program will follow up on recent observations made by the Hubble Space Telescope (HST) that obtained accurate measurements of the planet's size. While previous observations were made using Webb, the planet's proximity to its host star saturated most of its near-infrared observing modes. But thanks to the implementation of the NIRCam Short-Wavelength Grism Time Series, astronomers can now observe LTT1445A b without risk of saturation.
Katherine Bennett, a Ph.D. student in Planetary Sciences at Johns Hopkins University, is the program's principal investigator. Their planned observations will monitor LTT1445A b during eight transits using the NIRCam Grism Time Series template. As Bennet and her colleagues indicated in the program description:
"We note that LTT1445Ab's hotter and smaller sibling, LTT 1445Ac, is being targeted by the STScI Rocky Worlds DDT Program. By coupling the DDT emission photometry study with our NIRCam transmission spectroscopy study, we can map the presence of atmospheres within a single system. What's more, if LTT 1445Ab does not have an atmosphere, this would have profound implications for M-dwarf habitability in general."
Similarly, program GO 7875 ("The only known atmosphere on a rocky exoplanet?") will dedicate observation time to 55 Cancri e. This Super-Earth, located 41 light-years away, measures 1.875 Earth radii and has a mass 7.99 times that of Earth. Its close orbit to 55 Cancri A means it is extremely hot, with an estimated equilibrium temperature of 2000 K (1725 °C; 3140 °F). This has led astronomers to theorize that the entire planet is covered in an ocean of lava.
While not a good candidate for astrobiology studies, it is currently the only rocket exoplanet with evidence of an atmosphere. The program's principal investigator is Michael Zhang, an Inaugural E. Margaret Burbidge Prize Postdoctoral Fellow at the University of Chicago. This program will conduct MIRI MRS observations of the exoplanet during three eclipses, which will allow them to confirm the existence of an atmosphere, obtain spectra, and constrain its carbon dioxide abundance. Per the program description:
"As an old, ultra-hot (Teq=2000 K), and ultra-short-period planet, 55 Cnc e may seem a-priori like a particularly hostile place for any gaseous envelope. Understanding whether and/or how such an envelope exists on 55 Cnc e, the most observationally favorable super-Earth, has strong implications for the survivability of rocky planet atmospheres more generally."
Another exciting program is GO 7953, "Exo-Geology: Surface Spectral Features from a Rocky Exoplanet." Led by PI Kimberly Paragas, a graduate student in the Planetary Science option at the California Institute of Technology (Caltech). This program will leverage the JWST's capabilities to conduct the very first spectroscopic characterization of a rocky exoplanet's surface.
This program will observe LHS 3844 b, a Super-Earth orbiting an M-type star 49 light-years from Earth. This exoplanet is considered the most promising surface characterization target in the exoplanet census. "This will allow us to leverage the vast expertise developed for Solar System rocky bodies to establish a new field of 'exo-geology' whose goal is to explore the geological histories and mantle compositions of rocky exoplanets is to explore the geological histories and mantle compositions of rocky exoplanets," states the team in their proposal.
Planet Formation
The Cycle 4 General Observations will also use Webb's IR imaging capabilities to explore how planets form from debris disks. This will address key questions in astrobiology, not the least of which is how habitable planets evolve. To this end, program GO 6940, "Determining the Origin of Water Ice in the Beta Pictoris Debris Disk," was selected as part of Cycle Four. This campaign is led by PI Sarah Betti, an STScI postdoctoral fellow.
This program will use Webb's Near-Infrared Spectrometer (NIRSpec) and spectrograph to obtain medium-resolution spectroscopy to resolve water and carbon dioxide ices in the Beta Pictoris debris disk. Recent spectrometric observations have the presence of ices across the whole disk for the first time in a debris disk, including a hint of a significant ice population at its outer edge. These grains were not expected to survive, leading to a shift in scientists' understanding of debris disk chemistry.
This discovery also raised new questions about the role of giant collisions in producing the observed ice grains. As a result, the characterization of the origin and composition of these ices is vital to our understanding of late-stage planet formation and ice transport in disks. To this end, this program aims to conduct MIRI spectroscopy of the system's disk to resolve frozen volatiles, allowing astronomers to learn more about how planet formation occurs in debris disks.
"By mapping the whole dust clump, we can uncover the origin, chemical composition, and thermal history of the ices in this disk," per the program proposal.
These programs offer a small taste of what the JWST will study during this observation cycle. In addition to exoplanet studies, teams from around the world will use observation time to learn more about a wealth of cosmological phenomena and unresolved questions in astronomy, astrophysics, astrobiology, cosmology, and planetary geology.
JWST Cycle 4 Spotlight, Part 2: The Distant Universe
JWST Cycle 4 Spotlight, Part 2: The Distant Universe
By Matthew Williams
Faraway galaxies dot the void like scattered jewels or grains of sand in this deep field image from the James Webb Space Telescope. The most distant galaxies in such images tend to appear as small, reddish blobs. Credit: NASA/ESA/CSA/STScI
Earlier this week, the Space Telescope Science Institute (STScI) announced the science objectives for the fourth cycle of the James Webb Space Telescope's (JWST) General Observations program - aka. Cycle 4 GO. This latest cycle includes 274 programs that will make up the JWST's fourth year of operations, amounting to 8,500 hours of prime observing time. These programs are broken down into eight categories that encompass Webb's capabilities.
This includes exoplanet study and characterization, the study of the earliest galaxies in the Universe, stellar populations and formation, and Solar System Astronomy. As we addressed in the previous installment, Cycle 4 includes many programs that will leverage Webb's extreme sensitivity and advanced instruments to observe exoplanets, characterize their atmospheres, and measure their potential habitability.
In keeping with Webb's major science objectives, many of the Cycle 4 programs will also focus on studying the earliest stars and galaxies in the Universe. These programs will build on previous efforts to observe high-redshift galaxies (those that formed shortly after the Big Bang), the first population of stars in the Universe (Population III), and examine the role Dark Matter (DM) played in their formation.
Central to this is the cosmological period known as the "Cosmic Dark Ages," which occurred between 370,000 and 1 billion years after the Big Bang. During this time, the Universe was permeated by neutral hydrogen, and there were only two main sources of photons: the relic radiation left over from the Big Bang - the Cosmic Microwave Background (CMB) - and those occasionally released by neutral hydrogen atoms.
This period is also when the first stars and galaxies are believed to have formed (ca. 13.6 billion years ago). This led to the gradual ionization of the clouds of neutral hydrogen, which led to the "Epoch of Reionization," which led to the Universe becoming "transparent" (visible to modern instruments). Cosmologists refer to the period where the first galaxies emerged from the Dark Ages as “Cosmic Dawn."
Previous instruments lacked the resolution or sensitivity to capture light from this epoch, which is shifted into parts of the infrared spectrum that are very difficult to observe. However, Webb's sensitivity and infrared optics allow astronomers to finally pierce the veil of the "Dark Ages."
The Planck legacy, inflation and the origin of structure in the universe
High Redshift Galaxies
The earliest galaxies in the Universe are designated "high redshift," which refers to how the wavelength of their light has become elongated due to the expansion of the Universe ((aka. the Hubble-Lemaitre Constant). This causes the light to become "shifted" towards the red end of the spectrum. Light from galaxies that existed during the early Universe (more than 13 billion years ago) is redshifted to the point where it is only visible in the infrared spectrum.
This is the purpose of the GO 7208 program, titled "THRIFTY: The High-RedshIft FronTier surveY." This observation campaign will build on JWST's detection of several luminous galaxies with redshift values greater than 9 (z>9). This corresponds to galaxies that existed up to 13.5 billion years ago, one of Webb's greatest discoveries to date. The abundance of galaxies this early in the Universe and their apparent brightness was a surprise to astronomers and has led to a revision of theories on early galaxy formation.
The program's PI is Romain Meyer, a postdoctoral researcher at the University of Geneva (UNIGE). As he and his team described in their GO 7208 program proposal, "THRIFTY will determine the true number density of ultra-luminous galaxies at z>9 by targeting a sample of 123 candidates selected from >1 million sources over a total of 0.3 square degrees (out of the Galactic plane) from all existing prime and pure-parallel JWST imaging surveys."
One of Webb's earliest discoveries from Cycle 1 was of a population of small, red-tinted galaxies during the early Universe that may have contained growing SMBHs. These "Little Red Dots" (LRDs), as they were nicknamed, were thought to be Active Galactic Nuclei (AGNs), or quasars, but many astronomers. While they were declared one of the biggest discoveries in physics in 2023, there is still no consensus on what they actually are.
Enter the GO 7404 program, titled "How I wonder what you are -- do JWST's Little Red Dots twinkle? Testing broad-line and continuum variability on week, month, and six-month." Rohan Naidu, a NASA Hubble Fellow and the Pappalardo Fellow in Physics at the Massachusetts Institute of Technology (MIT), is this program's Principal Investigator (PI). Using Webb's Near-Infrared Camera (NIRCam), they will conduct the first longwave systematic LRD monitoring campaign to determine their exact nature.
Next, there's the GO 7814 program, titled "MINERVA: Unlocking the Hidden Gems of the Distant Universe and Completing HST and JWST’s Imaging Legacy with Medium Bands." This program, led by PI Dr. Adam Muzzin of York University, will build on the deep imaging surveys conducted with the JWST Near-Infrared Camera (NIRCam). While revolutionary, these surveys were limited to broad-band observations with low spectral resolution.
For their program, they will use Webb's Mid-Infrared Instrument (MIRI) to examine the primary fields observed by the Hubble Space Telescope(HST) and the JWST. In the process, they plan to increase the surveyed area nearly by a factor of 10 compared to existing medium-band programs, leading to the discovery of rare and previously undetected populations in existing deep-field catalogs.
These observations, they state, will allow them to:
"efficiently identify and characterize galaxies with unusual SEDs including z>12 candidates, high-redshift Balmer breaks, metal-poor extreme emission line galaxies, and extremely red/dusty sources,
improve stellar mass and star-formation rate density measurements at 2 < z < 10 by factors of 2-4, and
create resolved maps of stellar mass and star formation across 10 Gyr of cosmic time to model galaxy growth in two dimensions."
Epoch of Reionization
In addition to the earliest galaxies, one of Webb's biggest objectives is the detection of the first stars in the Universe. These Population III stars are believed to have been ultra-hot, massive, and short-lived, remaining in their main sequence phase for a few dozen million years. They also emitted tremendous amounts of ultraviolet radiation, which led to the "Epoch of Reionization" (EoR). Until the deployment of the JWST, this population of stars remained entirely theoretical.
This is the reason for programs like GO 7677, "Pushing the Faintest Limits: Extremely Low-Luminosity and Pop III-like Star-Forming Complexes in the Early Universe." Using the JWST's NIRSpec integral field unit (IFU), the team - led by Eros Vanzella, a First Researcher of the INAF Astrophysics and Space Science Observatory in Bologna - will observe two stars at z=5.663 and z=4.194, corresponding to distances of 11.7 billion and 11.425 billion light-years away. As they state in their proposal:
"This study will allow us to measure the metallicity of both sources and assess the presence of massive stars in such elusive systems by evaluating their ionizing photon production efficiency. These observations will expand (at least double) the sample of ultra-faint sources with these measurements which only JWST can perform, pushing the frontier of understanding toward Population III-like star formation conditions. The fortunate angular proximity of the two targets allows for simultaneous observation within the same IFU field of views."
There's also the GO 7436 program, "The Last Neutral Islands at the End of Reionization? Characterizing the Nature of the Longest Dark Gaps in IGM Transmission at z~5.3." During this cosmic epoch, ionized regions gradually grew and overlapped in the intergalactic medium. However, how and when it took place is still unknown, and placing accurate estimates is crucial to studying the formation of galaxies in the early Universe. It is led by PI Xiangyu Jin, a graduate student with the Stewart Observatory at the University of Arizona.
He and his team plan to use the JWST to observe galaxies with redshifts of around z=5.5, corresponding to distances of about 12.4 billion light-years away. At this point, roughly 1.4 billion years after the Big Bang, the intergalactic medium (IGM) appears highly ionized to modern instruments, but "dark gaps" have still been observed. "These long dark gaps could be the last remaining neutral islands in the IGM at the end of a highly inhomogeneous reionization process," they propose. "If confirmed, it will have a profound impact on the physics of reionization."
To this end, they propose observations using the W. M. Keck Observatory and Webb's NIRCam. While the Keck observations will probe the Lyman-alpha emissions from roughly 230 galaxies (about 75 in the "dark gap" regions), NIRCam Wide Field Slitless Spectroscopy (WFSS) will conduct redshift measurements of these galaxies. "We will also characterize the galaxy density field around long dark gaps," they added. "This joint program will allow us to directly test the ultra-late reionization model and to place robust constraints on the topology of reionization and the nature of inhomogeneous reionization."
Then there's GO 8018, titled "DIVER: Deep Insights into UV Spectroscopy at the Epoch of Reionization." Led by PI Xiaojing Lin, a graduate student with the University of Arizona Steward Observatory. , this program will build on Webb's early observations of the EoR. These revealed hard radiation fields and bursts of star formation that were sometimes accompanied by the detection of extreme conditions in the interstellar medium (ISM) and unusual chemical abundance.
According to Lin and her colleagues, high-quality rest-frame UV spectroscopy of galaxies during this period is urgently needed. The team proposes conducting a deep spectroscopic survey of over 140 galaxies in the Great Observatories Origins Deep Survey North (GOODS-N) field at redshifts of z=5 to 9 (12.469 to 13.11 billion light years away). As the team wrote, this will establish the largest and deepest UV spectral database for EoR galaxies:
"DIVER will directly (1) clock the star formation history by determining the distribution and redshift evolution of carbon abundance and (2) probe the prevalence of extremely high electron density and its connection to bursty star formation and chemical peculiarity. DIVER will also lead to various high-profile science, including the UV demographics of AGNs and massive stellar populations, and constraining the reionization history through LyA. With great legacy values, DIVER will advance our understanding of star formation and chemical enrichment history in the early Universe, providing a crucial foundation for studies of z>10 galaxies."
Dark Matter Halos
According to the Standard Model of Cosmology - the Lambda Cold Dark Matter (LCDM) model - Dark Matter (DM) played a vital role in the formation of galaxies in the early Universe. In theory, DM halos (DMHs) formed from the gravitational collapse of density perturbations after the Big Bang and provided the gravitational "wells" that allowed clouds of gas to form Population III stars and the first galaxies. Like many other aspects of the early Universe, this process has remained entirely theoretical until this point.
The purpose behind the GO 7519 program, "How do dark matter halos connect with supermassive black holes and their host galaxies?" is to address the role these played in galaxy formation. Previous observations with Webb have played an important role in measuring the mass of DMHs in high-redshift quasars, but these measurements were limited to bright quasars. Per their proposal, the team will rely on NIRCam WFSS observations to identify emission lines from doubly ionized oxygen (O III) around 12 faint quasars at distances of about 12.716 billion light-years.
"In this new effort, we will measure the average DMH mass from the cross-correlation analysis of quasars and surrounding [O III] emitters and evaluate the DMH mass probability density function for individual quasars based on cosmological simulations. This program will allow us, for the first time, to obtain a quasar sample in which the black hole mass, stellar mass, and halo mass are all measured simultaneously. This sample will reveal their lifetime and the scaling relations in the early universe, underlying the SMBH growth of SMBHs over cosmic time."
For decades, astronomers, astrophysicists, and cosmologists have had to contend with limitations on what they could see within the cosmos. Thanks to the Hubble Space Telescope, they were able to observe galaxies that existed about 1 billion years after the Big Bang. Thanks to missions like the COsmic microwave Background Explorer (COBE), the Wilkinson Microwave Anisotropy Probe (WMAP), and Planck, they were able to measure the earliest light in the Universe.
Thanks to the JWST, scientists are now able to get a look at what came in between. By observing galaxies and cosmic structures as they existed shortly after the Big Bang, we may someday be able to chart cosmic evolution all the way back to the beginning of time.
Concept of the META-LUNA architecture for SPS construction / decommissioning. Credit - H Oqab et al.
Solar Power Satellite (SPS) advocates have been dreaming of using space resources to build massive constructions for decades. In-space Resource Utilization (ISRU) advocates would love to oblige them, but so far, there hasn't yet been enough development on either front to create a testable system. A research team from a company called MetaSat and the University of Glasgow hope to change that with a new plan called META-LUNA, which utilizes lunar resources to build (and recycle) a fleet of their specially designed SPS.
Let's start with that SPS. The Multi-domain Operations using Rapidly-responsive PHased Energy Universally Synchronized (MORPHEUS) SPS system is a "sandwich-type," meaning the solar panels are on one side of the satellite, the electronics to convert the electricity from solar panels into a microwave are in the middle, and the microwave transmitters are on the other side—like a sandwich.
According to the MetaSat authors of a recent paper, which was presented at the International Astronautical Congress in October, it is the first SPS system to undergo a combination of "eco-design principles" and life-cycle assessment (LCA), which is commonly used on Earth to quantity the environmental impact of a piece of technology. When they did the LCA on MORPHEUS, the authors found that the numbers didn't look good. It required significant resources to construct on the Earth and then even more resources to launch its massive bulk into space. Simply making up for the energy to get it into position to start producing its energy would take years to repay.
Reflectors are one SPS model that could provide almost unlimited energy.
So, the authors decided to take a different approach - build it out of materials already available in space - particularly on the Moon. The Moon is covered in a substance known as "regolith" down to a few meters. It consists of fragments of rocks from the Moon's surface that were blasted about by meteoroid impacts, which already created materials called "agglutinates," which are basically melted glass particles that contain an agglomeration of materials. It is also extraordinarily abrasive and can cause potential long-term health problems for humans or maintenance problems for machines.
However, it has useful materials, and META-LUNA plans to use them to build MORPHEUS power satellites automatically. The paper describes, admittedly at a very high level, the key components needed to build not only a fully autonomous manufacturing line for the various components of an SPS but also additional pieces of the factory itself, allowing it to grow over time in a way that would be familiar to John von Neumann.
Utilizing readily available materials in the regolith, like silicon and aluminum, and advanced 3D printing techniques, an autonomous factory on the Moon could, in theory, at least produce almost all of what the MORPHEUS SPS would need. It would even be capable of making its own propellant to launch the SPS components into lunar orbit.
SPS is coming - it's just a matter of time, according to Isaac Arthur. Credit - Isaac Arthur YouTube Channel
One glaring exception though, is advanced microcontrollers commonly used for control and communication. These, assumedly, would have to be made on Earth and then flown to the Moon, though there's no detailed discussion in the paper of how that would work. Luckily, microcontrollers are light, and only a few kilograms could supply significant parts for the automated factory.
Another critical factor is that the factory can recycle the SPSes themselves. The paper describes getting them back into lunar orbit by using a series of tugs that are also used to drag the original satellite from lunar orbit to Earth orbit and then disassembling them at the same on-orbit construction yard used to assemble the parts. However, the paper doesn't describe how to get the disassembled satellites back down to the surface, where they could be scavenged without causing a massive dust explosion.
The environmental modeling from this different architecture looks vastly superior to the original LCA done on the Earth-constructed MORPHEUS - which comes as no surprise as there's no environment to disturb on the Moon, and the energy cost of launching something to geostationary Earth orbit is dramatically reduced. However, there's still a long way to go before any of the technologies necessary to make it happen are available. As the authors describe, advances in robotics and AI technology bring this dream closer daily. But, the true melding of SPSes and ISRU is still a long way off.
Artist's depiction of Nighthawk flying over a volcano. Credit - D Loya & P Lee
Ingenuity proved beyond a shadow of a doubt that a helicopter can operate on another planet. Over 72 flights, the little quadcopter that could captivated the imagination of space exploration fans everywhere. But, several factors limited it, and researchers at NASA think they can do better. Two papers presented at the recent Lunar and Planetary Science Conference, held March 10-14 in The Woodlands, Texas, and led by Pascal Lee of NASA Ames and Derric Loya of the SETI Institute and Colorado Mesa University, describe a use case for that still-under-development helicopter, which they call Nighthawk.
There are plenty of interesting places to explore on Mars, but one has stood out to fans of Mars exploration. Dr. Lee is undoubtedly one of those fans, as one of his roles is as the Founder of the Mars Institute, a non-profit dedicated to research on the Red Planet. The place that stands out is called Noctis Labyrinthus—the Labyrinth of the Night.
Noctis Labyrinthus is interesting for a variety of reasons, but one of the most important is its geographic location. It's sandwiched between Valles Marineris to the East and Tharsis, the giant shield volcano, to the west. One particular site, known as Noctis Landing, in the east of the region, has regularly been proposed as a potential human landing site for future crewed missions.
Fraser discusses using resources on Mars - which Noctis Labyrinthus might have a lot of.
However, the terrain of Noctis Labyrinthus is challenging, to say the least. It contains dune fields, ancient lava flows, giant boulders, and even deeper canyons. In other words, it's not somewhere a rover would be very effective at traversing.
But a helicopter would be. Landing safely in the area might be tricky, but a helicopter could soar above the fray, landing only when it found a safe spot and taking dramatic aerial pictures while doing so.
So why not just use Ingenuity or a similar class of helicopter? That is the focal point of one of the papers, and the answer is three specific reasons:
Ingenuity relies on a rover (Perseverance) to relay communications back to Earth - and rovers aren't particularly useful in Noctis Labyrinthus
Ingenuity could only reach a height of about 25 m off the ground, which is too small of a height differential to circumvent some obstacles in the region—the authors estimated 100m above the ground as a minimum.
Ingenuity wouldn't have enough thrust to fly in the less dense Martian atmosphere in the region, at least for most of the year. And it definitely wouldn't have enough to carry a 3kg payload, as the authors would want for their science mission.
Fraser discusses the life and legacy of Ingenuity - Mar's first helicopter.
That's where the NASA Mars Chopper comes in. It is being designed as a stand-alone, SUV-sized drone capable of carrying a science payload of up to 5kg up to 3km per day. That aligns much more closely with the team's science goals for Nighthawk. They expect a 3kg payload consisting of a color camera, a near-infrared one, and a neutron counter that also serves as a water detection instrument.
Nighthawk is expected to complete around a 300 km journey throughout its primary science mission. It will look for evidence of potential water deposits and study the evolution of this part of the Red Planet. A "light tone deposit," or LTD, is of particular interest near the Relict Glacier, which could hold much water closer to the equator than the known deposits near the poles.
There are already many missions that hope to utilize the Mars Chopper, though Nighthawk stands out as a very well-thought-out plan, and it already has the backing of one of NASA's premiere Mars scientists. Currently, there is no set date for the competition of the new Mars Chopper. Still, as it continues its development, mission planners will undoubtedly start looking at architectures like Nighthawk to determine where the newly designed massive drone will go first.
The European Space Agency's Hera mission flew by Mars and its lesser-known moon Deimos on March 12, 2025, for a critical gravity assist for its journey.
Credit: ESA
A European spacecraft on a journey to study NASA's asteroid crash site did a quick pop-in of Mars on its way, capturing unprecedented images of Mars' lesser-known moon, Deimos.
Mars has two moons, Phobosand Deimos, but scientists know relatively little about them, especially the smaller one, Deimos. Nearly all of the images they have of it were taken from the Martian surface by rovers, and because the moon is tidally locked— meaning one full spin matches the amount of time it takes to complete its orbit of Mars — only one side has been seen on the Red Planet.
The Hera mission spacecraft captured views of the moon's far side, swinging within 625 miles of Deimos in space.
While the car-sized spacecraft flew around the Mars system, flight controllers on Earth temporarily lost communication with Hera because the signal was blocked. Though the blackout was planned for the maneuver, Ian Carnelli, the European Space Agency's Hera mission manager, said it was deeply emotional.
"I was almost in tears. I mean, I know probably this is normal for a flight for spacecraft operators, but every time we lose contact with a spacecraft, I'm super nervous," he said during a webcast following the flyby. "Then I was running to the room where the scientists were [watching for images], and as soon as I opened the door, they were screaming — really screaming."
Among those scientists was one of the co-founders of Queen. When Brian May isn't playing guitar riffs, he is an astrophysicist. As part of Hera's science team, May brings his expertise in stereoscopic imaging. That means he helps decipher complex scientific data into 3D pictures.
During a webcast on Thursday, May described some of the topographical details of the moon already brought to life through the raw data. A depression in the city-sized moon was visible, a feature May described as a "saddle" on the left side and some little craters at the bottom.
"You feel like you're there, and you see the whole scene in front of you," he said. "The science that we get from this is colossal, and I think we're all like children."
Deimos, one of Mars' two moons, is eight miles wide and orbits about 14,600 miles away from the Red Planet.
Credit: ESA
The flyby of Mars and Deimos wasn't a detour but a necessary maneuver to put the spacecraft on the right trajectory toward its ultimate destination. Swinging within 3,100 miles of Mars, Hera used its gravity to adjust its course.
Scientists would like to understand where Deimos and its partner Phobos came from — whether they were once asteroids captured in orbit around Mars or are chunks of the planet itself, blown out by a giant impact.
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Over mijzelf
Ik ben Pieter, en gebruik soms ook wel de schuilnaam Peter2011.
Ik ben een man en woon in Linter (België) en mijn beroep is Ik ben op rust..
Ik ben geboren op 18/10/1950 en ben nu dus 74 jaar jong.
Mijn hobby's zijn: Ufologie en andere esoterische onderwerpen.
Op deze blog vind je onder artikels, werk van mezelf. Mijn dank gaat ook naar André, Ingrid, Oliver, Paul, Vincent, Georges Filer en MUFON voor de bijdragen voor de verschillende categorieën...
Veel leesplezier en geef je mening over deze blog.
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