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.
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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.
10-09-2024
So, Would Starliner Have Safely Brought Its Astronauts Home?
So, Would Starliner Have Safely Brought Its Astronauts Home?
Story by Doris Elín Urrutia
NASA/Getty Images News/Getty Images
Starliner is finally home. But its crew — astronauts Butch Wilmore and Suni Williams — are not. Could Starliner have safely carried them?
The Boeing spacecraft’s initial 8-day flight ballooned into a months-long saga shortly after launch. The aerospace company and NASA, who are collaborating for the agency’s Commercial Crew Program to bring low-cost astronaut rides to and from space, had tense discussions. Boeing argued their spacecraft was sound enough to return the crew. NASA was uncomfortable signing off. Starliner therefore landed shortly past midnight Eastern time early Saturday without Wilmore and Williams.
But in hindsight, would it have been fine?
Steve Stich, manager of NASA’s Commercial Crew Program, doesn’t beat about the bush on this point: “It would have been a safe successful landing with the crew onboard, had we have had Butch and Suni onboard.”
These comments came during a media conference NASA held after landing — noticeably without Boeing officials, who did not participate in the event. Stich explained that “if there was a crew onboard, it would have flown the same back-away sequence, and the same orbit return, and executed the same entry.”
This of course was not a given since not long after Starliner entered orbit around Earth on June 5, it leaked helium and five thrusters malfunctioned. Out of an abundance of caution — or according to many even a modicum of it — NASA did not want to send the astronauts home once they looked over the data with Boeing. It was not an easy decision and as Stich noted in an earlier meeting that “the teams were very split.” Boeing thought it would be fine — NASA “saw limitations” in the data.
So, Would Starliner Have Safely Brought Its Astronauts Home?
Moving forward, this uneventful landing doesn’t mean Starliner is now certified to get back in the game. Starliner’s launch in June was its critical Crew Flight Test, which would have certified Starliner as an astronaut ferry provider for NASA — had nothing gone awry. Of course, plenty went wrong and it was a huge hitch for Wilmore and Williams who will now return to Earth in February 2025 at the earliest, onboard a SpaceX Crew Dragon capsule set to launch to the International Space Station later this month.
Related video:
NASA Says Something Weird Is Happening With Boeing's Starliner, Stay in Space Forever!
“I’d say it’s probably too early to think about what the next flight looks like. We want to look at the data,” Stich said.
Amidst Boeing’s absence at the conference, Stich said the company is still a major partner. The major goal of the Commercial Crew Program is to get Starliner to the point where it’s greenlit for crew rotation. But the next steps aren’t yet clear.
“We will review the data and determine the next steps for the program,” Mark Nappi, vice president and program manager of Boeing’s Commercial Crew Program, said in a statement Boeing published after Starliner landed.
“It will take time to determine the path forward,” Stich said. “Today we saw the vehicle perform well.”
Mysterious objects spotted in the outer solar system beyond Pluto
Mysterious objects spotted in the outer solar system beyond Pluto
Story by Eric Ralls
Mysterious objects spotted in the outer solar system beyond Pluto
Recent observations using the ultra-widefield prime focus camera of the Subaru Telescope have shown that there may be a population of small astronomical objects further out in the Kuiper Belt still waiting to be discovered.
According to the experts, the findings are essential for a better understanding of the formation of the solar system.
The research was made possible through an international collaboration between the Subaru Telescope and the New Horizons spacecraft traveling through the outer solar system.
New Horizons flew through the Kuiper Belt
NASA's New Horizons spacecraft was launched in 2006 in order to observe the surfaces of outer solar system bodies up close for the first time in our history. The spacecraft successfully completed a flyby of the Pluto system (2015), and later on (2019) it made a flyby of one of the Kuiper Belt objects, (486958) Arrokoth.
Although there were four other spacecraft which have flown to the outer solar system, New Horizons is the only one that has flown through the Kuiper Belt.
Viewing objects in the Kuiper Belt
When examining Kuiper Belt objects from the ground, we can only observe them at small solar phase angles (the angle between the sun, the object, and the observer).
However, when looking at an object in the outer solar system from a spacecraft in the Kuiper Belt, these objects can be observed at different phase angles and their reflection characteristics can be utilized to estimate their surface properties.
Related video:
One of NASA’s Furthest Probes Just Gave Us a Look at Just How Dark the Universe is Beyond Our Solar System
Yet, the camera on the New Horizon spacecraft has a narrow field-of-view and cannot find Kuiper Belt objects on its own.
Fortunately, the Subaru Telescope can use its wide-field camera to discover a variety of Kuiper Belt objects and then narrow down the collection of objects which the spacecraft can fly by and examine.
New Horizons and the Subaru telescope
The collaboration between the New Horizons spacecraft and the Subaru Telescope was initiated in 2004.
During the 2004–2005 observations with the Subaru Telescope's prime focus camera (Suprime-Cam), the orbital alignment between Pluto and the spacecraft caused a portion of the Milky Way's center to appear in the background of the search area for Kuiper Belt objects.
While it was highly difficult to search for solar system objects with multiple background stars, the scientists were able to localize 24 Kuiper Belt objects.
Unfortunately, the Kuiper belt objects discovered until now require too much fuel for New Horizons to flyby, but new ones at greater distances might fall within the available fuel reach of the spacecraft.
In 2020, deeper observations with the Hyper Suprime-Cam (HSC) on the Subaru Telescope began, and, by 2023, 239 Kuiper Belt objects were discovered.
A large number of objects discovered with HSC are located at distances ranging from 30 to 55 astronomical units (au) from the Sun (with one au corresponding to the distance between the Sun and Earth) and are thought to belong to the known Kuiper Belt.
However, the experts were not expecting to discover what looks to be a cluster of objects in the 70–90 au region and a valley between 55 and 70 au, where only a small number of objects are distributed.
Is there a new population of Kuiper Belt objects located at 70–90 au? "If this is confirmed, it would be a major discovery. The primordial solar nebula was much larger than previously thought, and this may have implications for studying the planet formation process in our solar system," Yoshida explained.
"This is a groundbreaking discovery revealing something unexpected, new, and exciting in the distant reaches of the solar system; this discovery probably would not have been possible without the world-class capabilities of the Subaru observatory," added New Horizons mission principal investigator Alan Stern.
Understanding solar system formation
In order to determine the precise orbits of these objects, the scientists are continuing observations with HSC.
"I think the discovery of distant objects and the determination of their orbital distribution are important as a stepping stone to understanding the formation history of the solar system, comparing it with exoplanetary systems, and understanding universal planet formation," Yoshida said.
New Horizons is currently traveling further out, at approximately 60 au from the Sun, hoping to discover many more distant objects.
The findings will be published in two articles in the Planetary Science Journal and are currently available on the arXiv preprint server.
Check us out on EarthSnap, a free app brought to you by Eric Ralls and Earth.com.
VIDEOS
Incredible Discoveries Of The James Webb Telescope | Universe Explorers | BBC Earth Science
The Year of Pluto - New Horizons Documentary Brings Humanity Closer to the Edge of the Solar System
Mysteries of the Universe. A Journey to Amazing Objects
Largest Dark Matter Detector is Narrowing Down Dark Matter Candidate
In 2012, two previous dark matter detection experiments—the Large Underground Xenon (LUX) and ZonEd Proportional scintillation in Liquid Noble gases (ZEPLIN)—came together to form the LUX-ZEPLIN (LZ) experiment. Since it commenced operations, this collaboration has conducted the most sensitive search ever mounted for Weakly Interacting Massive Particles(WIMPs) – one of the leading Dark Matter candidates. This collaboration includes around 250 scientists from 39 institutions in the U.S., U.K., Portugal, Switzerland, South Korea, and Australia.
On Monday, August 26th, the latest results from the LUX-ZEPLIN project were shared at two scientific conferences. These results were celebrated by scientists at the University of Albany‘s Department of Physics, including Associate Professors Cecilia Levy and Matthew Szydagis (two members of the experiment). This latest result is nearly five times more sensitive than the previous result and found no evidence of WIMPs above a mass of 9 GeV/c2. These are the best-ever limits on WIMPS and a crucial step toward finding the mysterious invisible mass that makes up 85% of the Universe.
Led by the Department of Energy’s (DoE) Lawrence Berkeley National Laboratory, the LZ experiment is located at the Sanford Underground Research Facility in South Dakota, about 1,500 meters (nearly a mile) beneath the surface. The experiment relies on an ultra-sensitive detector made of 10 tonnes (11 U.S. tons) of liquid xenon to hunt for the elusive signals caused by WIMP-nucleus interactions. While direct detections are yet to be made, these latest results have helped scientists narrow the search.
“Dark matter interacts very, very rarely with normal matter, but we don’t know exactly how rarely. The way we measure it is through this cross-section or how probable an interaction is within our detector. Depending on the mass of a dark matter particle, which we don’t know yet, an interaction within the detector is more or less probable. What the new LZ results tell us is that dark matter interacts with normal matter even more rarely than we thought, and the only instrument in the world that is sensitive enough to measure that is LZ.”
The existence and nature of Dark Matter are among the greatest mysteries in modern astrophysics. Originally proposed to explain the rotational curves of galaxies, the existence of Dark Matter is vital to the most widely accepted cosmological model – the Lambda Cold Dark Matter (LCDM) model. Unfortunately, according to the prevailing theories, DM only interacts with normal (aka. “luminous”) matter via gravity, the weakest of the four fundamental forces. Detecting these interactions requires incredibly sensitive instruments and an environment free of electromagnetic energy (including heat and light).
While no direct detections have been made, the latest results from LZ have narrowed the range of possibilities for one of the leading DM candidates. As Szydagis said:
“It’s often misunderstood what is meant by the phrase ‘world’s best dark matter experiment’ since no one has made a conclusive, unambiguous discovery yet. However, new, stricter null results like LZ’s are still extremely valuable for science. UAlbany, as one part of the multinational collaboration that is LZ, has been making important contributions ensuring the robustness of LZ’s results, going back to the very beginning of the experiment.”
Although DM remains “invisible” to us, the presence of its gravitational pull is fundamental to our understanding of the Universe. For example, the formation and movement of galaxies are attributed to DM, and its existence is vital for explaining the large-scale structure and evolution of the Universe. If DM does not exist, then our understanding of gravity – as described by Einstein’s Theory of General Relativity – is essentially wrong and needs revision. However, General Relativity has been experimentally validated again and again over the past century.
Therefore, narrowing the search for its constituent particle is vital to proving that our foundational theories about the Universe are correct. As Levy noted, UAlbany scientists have been making integral contributions to LZ for over a decade, and their work is far from done! “Working on LZ is always so exciting, even if we still have not made a discovery yet,” she said. “We all know that if it were easy, someone else would have done it already! I think right now what we need to take out of this result is that LZ is a great team of scientists, our detector is working superbly, our analysis is extremely robust, and we are nowhere near done taking data.”
Using A Space Elevator To Get Resources Off the Queen of the Asteroid Belt
Here at UT, we’ve had several stories that describe the concept of a space elevator. They are designed to make it easier to get objects off Earth and into space. That, so far, has proven technically or economically infeasible, as no material is strong enough to support the structure passively, and it’s too energy-intensive to support it actively. However, it could be more viable on other worlds, such as the Moon. But what about worlds farther afield? A student team from the University of Colorado at Colorado Springs looked at the use case of a space elevator on Ceres and found that it could be done with existing technology.
Before we discuss why anyone would want to put a space elevator on Ceres, let’s first examine the technologies that would make it possible. Every space elevator design has three different components: an anchor, a tether, and a counterweight. Each would require its own technologies.
The anchor is simple enough; it’s how the system interfaces with Ceres. The surface of Ceres is primarily made of clay, which is relatively good for anchoring technologies. Luckily, the force the anchor needs to withstand is only around 300N, which is much lower than the force on Earth, given Ceres’ small mass. There have already been asteroid anchoring technologies for other missions that can provide up to 500N of force resistance, so an anchor on Ceres should prove no real challenge.
Fraser describes the general idea of a space elevator.
The tether is where the technology falls short on Earth – no material known to science can withstand the forces exerted on the tether of a passively controlled space elevator when it is tied to Earth. However, the closest we can come, something space elevator enthusiasts mention as almost a holy grail, is carbon nanotubes. In the analysis for the space elevator on Ceres, they once again came out ahead. However, the limitation of actually physically creating a long tether will still plague any space elevator design on Ceres.
The counterweight is much simpler, as it can be just a big, dumb mass. However, its mass is proportional to the necessary length of cable—the heavier the mass, the shorter the cable. So, the tradeoff between having a heavier counterweight and a shorter cable is another design consideration when considering these systems.
Calculations from the team show that, with only a little more technological development, all three main systems could be ready for installation on Ceres itself. But what advantages does it have? It could be helpful as a launching point for accessing other asteroids in the asteroid belt. Ceres also has water relatively near the surface, which is helpful for all kinds of human exploration, either as rocket fuel or biological systems. It’s also well placed to quickly get things back to Earth using Jupiter as a gravity assist.
Isaac Arthur goes into a deeper description of space elevators and their advantages.
But before it can provide any of those advantages, someone is going to have to pay for it. Estimates of the overall cost of the system total about $5.2 billion — not too far out of the range of larger-scale space exploration projects. But more than most countries are likely willing to pony up for a grand infrastructure project that hasn’t yet proven its benefit.
So, for now, any space elevator will remain in the realm of science fiction. But research like this and other ongoing technological improvements is how we will eventually push forward to that future. Whether it’s a space elevator on Ceres, on the Moon, or some other novel launch technology, someday humans will need a better way to get off Earth rather than burning dead living organisms. Hopefully, that day will come sooner rather than later.
Enigmatic depressions on the surface have puzzled scientists since the 1970s
For decades, scientists have been puzzling over strange hollows on Mercury’s surface, thousands of peculiar depressions at a variety of longitudes and latitudes, ranging in size from 60 feet to more than a mile across (18-1,600 meters), and depths of 80 feet or more (24 meters). No one knows how they got there.
And while none are as spooky as the Sleepy Hollow of Washington Irving’s legend, Mercury’s hollows are just as mysterious and, so far, seen nowhere else in the universe.
NASA’s MESSENGER spacecraft discovered strange hollows on the surface of Mercury. Images taken from orbit revealed thousands of mysterious depressions, pitted and uneven, in areas all across the planet, up to a mile (1,600 meters) across and 120 feet (37 meters) deep. This mosaic view of the Raditladi impact basin includes individual frames capturing areas about 12 miles (20 km) wide, which merged high-resolution monochrome images from MESSENGER's Narrow Angle Camera with a lower-resolution enhanced-color image from its Wide Angle Camera.
NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution for Science
“There’s essentially no atmosphere on Mercury,” said planetary geologist David Blewett, of the Johns Hopkins University Applied Physics Laboratory (APL) in Laurel, Maryland. “With no atmosphere, wind doesn’t blow and rain doesn’t fall, so the hollows weren’t carved by wind or water. Other forces must be at work.”
Mercury, the smallest planet in the solar system and closest to the Sun, is battered by heat, radiation, and solar wind; its extreme temperatures range from 800°F (430°C) on the sunny side, to as low as -290°F (-180°C) on the night side. It’s slightly larger, and similar to our Moon – airless, rocky, and peppered with impact craters large and small – but Mercury has rarely been visited by spacecraft, and retains many of its secrets.
Scientists got their first tantalizing glimpses of the hollows when the Mariner 10 probe flew past Mercury in the 1970s, and captured low-resolution shots of curious bright areas in some craters.
NASA returned to the small planet with the MESSENGER mission, which first flew past Mercury in 2008, then settled into orbit in 2011.
That spacecraft circled the planet more than 4,000 times in four years, collecting hundreds of thousands of images and other data, and giving researchers new insights into this little-explored world. Mariner had cataloged less than half the planet’s surface during its brief visits 40 years earlier.
“This sinfully scintillant planet...” A view of hollows on Mercury, on the crater named for author Edgar Allan Poe. In this image, Poe's raven-colored rim stands out from the tan volcanic plains that surround it. Tiny hollows speckle the dark rim like blue-white stars in the blackness of night. The image was one of hundreds of high-resolution targeted color observations by MESSENGER’s Wide Angle Camera, using filters of red, green, and blue.
NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution for Science
“A Little Valley…Among High Hills”
MESSENGER (the Mercury Surface, Space Environment, Geochemistry and Ranging mission) finally provided a sharper view of the enigmatic tracts. To differentiate them from other surface features, researchers dubbed them “hollows” (akin to Washington Irving’s description of the terrain in “The Legend of Sleepy Hollow” – “a little valley or rather lap of land among high hills.”)
The probe sent back finely detailed, beautiful images of the hollows, looking in some color-enhanced mosaics like sheets of copper corroded with blue-green patina. In others – such as shots of Sander crater in Mercury’s vast Caloris basin – the strange landforms, etched and ragged, glow bright blue amid the surrounding crater walls and mounds. And yet the images and other data, from MESSENGER’s X-Ray Spectrometer, Laser Altimeter, and other instruments, gave only hints and no definitive answers about the hollows.
This enhanced-color image from the MESSENGER mission shows (from left to right) the craters Munch (38 miles, or 61 km, wide), Sander (32 miles, or 52 km), and Poe (50 miles, 81 km), which lie in the northwest portion of Mercury’s Caloris basin. The hollows are the bright blue areas covering the floor of Sander and dotting the rims of Munch and Poe. The hollows are highly reflective and naturally appear bluish; in images like this, the spacecraft’s Wide Angle Camera used its 11 color filters to exaggerate the color spectrum, to highlight the variation among surface materials.
NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution for Science
”When we got high-resolution views back of Sander, the floor of the crater just looked amazing,” said Carolyn Ernst of Johns Hopkins APL, a deputy instrument scientist on the MESSENGER mission. “It had all these crazy-shaped, irregular depressions, and it had this bright material outside of it. And to this day, we don’t fully know what causes them.”
Researchers observed that the hollows are among the youngest and brightest features on the planet, especially compared to the impact craters where most reside, which date back as far as 4 billion years. The hollows, on the other hand, are relatively shiny and new – about 100,000 years old, on average – and may still be evolving today.
MESSENGER mission scientists Ralph McNutt and Carolyn M. Ernst, both with Johns Hopkins APL, discuss what they’ve learned about Mercury’s hollows, and how much more needs to be figured out.
Clues and Theories
“We’ve been thinking of Mercury as a relic – a place that’s really not changing much anymore, except by impact cratering,” Blewett said. “But the hollows appear to be younger than the craters in which they are found, and that means Mercury’s surface is still evolving in a surprising way.”
One possible clue to their formation is that many of the hollows are associated with central mounds or mountains inside Mercury’s impact craters. These so-called “peak rings” are thought to be made of material forced up from the depths by an impact that formed the crater. Ernst suggested a large object slamming into the planet, with the meteorite forming a new crater and tossing material from deep underground onto Mercury’s surface.
The newly-excavated material could be unstable, finding itself suddenly exposed at the surface. Because Mercury is so close to the Sun, it’s battered by fierce heat and extreme space weather – factors that might play a role in forming hollows, added Blewett, a member of the science team for MESSENGER.
”Certain minerals, for example those that contain sulfur and other volatiles, would be easily vaporized by the onslaught of heat, solar wind, and micrometeoroids that Mercury experiences on a daily basis,” he said. “Perhaps sulfur is vaporizing, leaving just the other minerals, and therefore weakening the rock and making it spongier. Then the rock would crumble and erode more readily, forming these depressions.”
Looking Ahead
NASA’s Mars Reconnaissance Orbiter spotted similar depressions in the carbon dioxide ice at Mars’ south pole, giving that surface a “swiss cheese” appearance. But on Mercury the depressions are found in rock and often have bright interiors and halos.
“We’ve never seen anything quite like this on a rocky surface,” Blewett said.
Other theories include the idea that darker areas on Mercury’s surface are graphite deposits that, when pummeled and destroyed by solar wind, collapse and leave behind pitted, hollowed areas of only the much brighter, blue-tinged materials.
We’ve never seen anything quite like this on a rocky surface.
David Blewett
MESSENGER mission participating scientist, Johns Hopkins University Applied Physics Laboratory
MESSENGER finally ran out of fuel and crashed into Mercury in April 2015, but researchers are still sifting through the data it collected. Scientists are also eagerly anticipating the arrival of BepiColombo to Mercury in 2025 and what secrets the mission will reveal. A joint European-Japanese venture, with two orbiters riding together, the craft made their first flyby of Mercury in October 2021 – only the third mission ever to visit the planet.
In his 1820 novel, Washington Irving wrote of Sleepy Hollow being a place of “strange sights, …haunted spots, and twilight superstitions; stars shoot and meteors glare oftener across the valley than in any other part of the country.”
Likewise, Mercury has its own “ghosts” – craters in a previous life, later shrouded by lava – and the planet has seen shooting stars and meteors peppering every part of its surface for billions of years.
The craters they leave are named for artists and authors, including Nathaniel Hawthorne, Herman Melville, and Edgar Allan Poe, whose namesake crater contains hollows. Maybe one day Irving, their mentor and contemporary, will join their company with his own crater. By then the true nature of Mercury’s strange hollows may be unmasked.
Images from the MESSENGER mission are helping tell the story of Mercury's geologic history; in this case, a ghost story. Once there was another crater resembling the one in the upper right of this scene. Then volcanic lava flooded the surface, burying the crater and leaving just a spectral outline of the crater's rim, the "ghost crater" located in the lower left of this image. After extensive flooding in Mercury's north, additional cosmic bodies impacted Mercury's surface, creating the various sized craters seen here, in an image taken Aug. 14, 2011 by MESSENGER’s Wide Angle Camera.
NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution for Science
BepiColombo captured this image of Mercury with its Monitoring Camera 3 when it was about 555 km above the surface. It shows the newly-named Stoddart Crater. Image Credit: ESA/BepiColombo/MTM CC BY-SA 3.0 IGO
The ESA/JAXA BepiColombo spacecraft made another flyby of its eventual target, Mercury. This is one of a series of Mercury flybys, as the spacecraft completes a complex set of maneuvers designed to deliver it to the innermost planet’s orbit. Its cameras captured some fantastic images of Mercury.
BepiColombo will eventually enter orbit around Mercury in November 2026. However, Mercury is a challenge to visit because of its proximity to the Sun and the Sun’s overwhelming gravity. To eventually orbit Mercury, the spacecraft is performing six gravity-assist flybys of the Solar System’s innermost planet. This is the 4,100 kg spacecraft’s fourth flyby.
The images are a bonus. The spacecraft’s monitoring cameras captured them, and those cameras are there to keep an eye on the spacecraft itself. But in this situation, they were able to image Mercury and some prominent craters. As BepiColombo approached and passed by Mercury, different monitoring cameras were able to capture images.
All three of BepiColombo’s monitoring cameras captured images of Mercury during the recent flyby. Many of the dual-spacecraft’s scientific instruments were also active, giving the mission personnel a chance to check their function. Image Credit: ESA/Work performed by ATG under contract to ESA/CC BY-SA 3.0 IGO
The closest approach during the recent flyby was on September 4th. BepiColombo—named after Italian scientist Giuseppe “Bepi” Colombo—came within about 165 km of Mercury’s surface. This was the first time that the spacecraft had a view of the planet’s south pole.
This image highlights Mercury’s rugged surface, featureless except for craters. BepiColombo’s MC2 captured this image from about 177 km altitude. The camera was aimed at the horizon, so the actual surface is a slightly greater distance away. North is to the lower left in this image. Image Credit: ESA/BepiColombo/MTM CC BY-SA 3.0 IGO
Even though Mercury is so close, it’s seldom visited. BepiColombo is only the third spacecraft to visit the small planet after NASA’s Mariner 10 mission in 1974/75 and Messenger mission from 2011 to 2015. Its proximity to the Sun is a complex challenge.
“BepiColombo is only the third space mission to visit Mercury, making it the least-explored planet in the inner Solar System, partly because it is so difficult to get to,” said Jack Wright, ESA Research Fellow, Planetary Scientist, and M-CAM imaging team coordinator.
“It is a world of extremes and contradictions, so I dubbed it the ‘Problem Child of the Solar System’ in the past. The images and science data collected during the flybys offer a tantalizing prelude to BepiColombo’s orbital phase, where it will help to solve Mercury’s outstanding mysteries,” said Wright.
The next flyby is only a few months away, on December 1st, 2024. The final one is on January 8th, 2025.
BepiColombo is actually two orbiters in one. Once it enters Mercury’s orbit, it’ll separate into the ESA’s Mercury Planetary Orbiter (MPO) and the JAXA-built Mercury Magnetospheric Orbiter (MMO) or Mio. The Mercury Transfer Module is the spacecraft that delivers the pair of orbiters.
This simple schematic shows the three separate spacecraft that combine to make the BepiColombo mission. Image Credit: ESA
There’s a lot we don’t know about Mercury, where it originated, and how it evolved so close to its star. The spacecraft will study Mercury physically, its form, interior, structure, geology, composition, and abundant craters. It’ll also study the planet’s exosphere.
Instead of an atmosphere, Mercury has an exosphere, a region consisting of atoms blasted off the planet’s surface by the Sun and by impacts. The exosphere is dynamic and changes according to how the solar wind interacts with the surface. Studying it is an opportunity to study planetary evolution and space weather. Understanding the exosphere is also critical to future missions, especially any potential landers, because it can affect spacecraft operations.
This image shows Mercury’s 213 km Vivaldi Crater. The two booms are the Mercury Planetary Orbiter’s medium gain antenna (top centre) and magnetometer boom (right). Image Credit: ESA/BepiColombo/MTM CC BY-SA 3.0 IGO
BepiColombo will also study Mercury’s magnetosphere and magnetic fields. Mercury’s global magnetic field is extremely weak, only about 1% as strong as Earth’s. This is mysterious since the planet seems to have a large iron core.
Mercury’s magnetosphere is also an object of interest. The powerful solar wind shapes it and prevents it from rising much above the surface. The magnetosphere is also very dynamic and quickly responds to changes in the solar wind, making it a natural laboratory to study the physics of magnetospheres. Its weakness also challenges our understanding of how planetary dynamos function.
BepiColombo was initially scheduled to reach Mercury’s orbit in December 2025. However, a problem firing its thrusters during a maneuver in April 2024 added 11 months to the mission. The revised orbital insertion will be in November 2026.
Once it reaches the rapidly moving Mercury, we’ll start to learn more than ever about this sometimes overlooked planet.
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Fossielen worden vaak gevonden als gevolg van opgravingscampagnes die een zorgvuldige planning en langdurig onderzoek vereisen. Maar soms is de ontdekking dichterbij dan het lijkt en is het voldoende om even goed te kijken: fossielen zouden wel eens onder onze voeten kunnen liggen... letterlijk. Dat is wat er gebeurde met James Ryan, een medewerker van de National Trust for Scotland, die een ongelooflijke ontdekking deed in Inverness, in Schotland. Op de stoep ontdekte hij fossielen die veel ouder waren dan dinosaurussen.
Fossielen op de stoep van Inverness: de ontdekking van James Ryan
We zijn in Inverness, een Schotse stad op een steenworp afstand van het beroemde Loch Ness, en James Ryan maakt een wandeling rond het Inverness Town House. Op een gegeven moment stopt de man om de details van het trottoir te observeren: ze hebben een vreemde vorm en lijken in de stenen plaat te zijn ingebed. Zouden het fossielen zijn?
Voor ons lijkt het verband misschien niet zo direct, maar voor James is het overduidelijk. Het is tenslotte zijn taak bij de National Trust for Scotland om bezoekers te vertellen over de ontdekkingen van de Victoriaanse geoloog Hugh Miller, dus hij heeft een getraind oog. Toch is het verbazingwekkend om fossielen te vinden in het gesteente dat het plaveisel van de stad vormt, vooral als je bedenkt hoe oud ze zijn. Volgens vroege reconstructies dateren ze van minstens 385 miljoen jaar geleden, toen er nog geen dinosaurussen op aarde rondliepen.
Fossielen die 385 miljoen jaar oud zijn
The Inverness Courier/Facebook
In feite zijn de platen waaruit de trottoirs van het stadscentrum van Inverness bestaan, erg oud, ongeveer 385 miljoen jaar oud. Het gaat om een steen die is ontstaan uit sedimenten die zijn afgezet op de bodem van een enorm zoetwatermeer. Kortom, de stad staat er vol mee, maar niemand had ooit zulke duidelijk afgebakende fossielen geïdentificeerd. Tenminste voor een deskundig oog als dat van James.
Om precies te zijn behoren de gevonden fossielen tot het Devoon, dat meer dan 100 miljoen jaar voor de komst van de dinosauriërs voorafgaat. Als we naar de straatstenen kijken, zien we dat de donkere vlekken wijzen op schubben van verschillende soorten oude beenvissen. Daarnaast kunnen er ook sporen zijn van andere botfragmenten en een vin: we hebben het hier over zeer oude vissen, maar met een fysionomie die niet onmogelijk te herkennen is.
Een unieke ontdekking?
Volgens Ryan, die de ontdekking aan de Inverness Courier meldde, is de vondst van fossiele vissen op de stoep uniek voor Inverness. Toch is het in het algemeen niet ongewoon in Schotland om sporen van fossielen te vinden op stenen platen die voor antropische doeleinden worden gebruikt. Het hangt allemaal af van het gebruikte gesteente, dat afkomstig is uit steengroeven die rijk zijn aan meer of minder oude fossielen: in Edinburgh bijvoorbeeld begeleidt de universiteit toeristen die ernaar willen zoeken. In een ander, al even buitengewoon geval vond een Britse boswachter tijdens het joggen een voetafdruk van een dinosaurus op een stenen plaat die werd gebruikt voor de bestrating van een pad.
Kortom, in de Schotse stad zijn fossielen te ontdekken en te vinden, misschien door toeval, misschien door geluk. Het verleden is immers dichter bij ons dan we ons kunnen voorstellen: soms vanuit metaforisch oogpunt, soms letterlijk. Het enige wat je hoeft te doen is naar beneden kijken.
NASA is Getting Serious About a Radio Telescope on the Moon
It’s widely known by now that the “dark side” of the moon, made famous by Pink Floyd, isn’t actually dark. It gets as much sunlight as the side that is tidally locked facing Earth. However, it is dark in one very important way – it isn’t affected by radio signals emanating from Earth itself. What’s more, it’s even able to see radio waves that don’t make it down to Earth’s surface, such as those associated with the cosmic “Dark Ages” when the universe was only a few hundred million years old. Those two facts are the main reasons the far side of the moon has continually been touted as a potential location for a very large radio telescope. Now, a project sponsored by NASA’s Institute for Advanced Concepts (NIAC) has received more funding to further explore this intriguing concept.
The project, known as the Lunar Crater Radio Telescope (LCRT), is part of NIAC’s Phase II program, and recently received $500k in additional funding to push the project further towards becoming a fully fledged NASA mission. This isn’t the first time a radio telescope on the moon has been proposed. But the LCRT team, led by Saptarshi Bandyopadhyay at JPL, have suggested two new and interesting features that make their approach much more attractive than previous alternatives.
UT video discussing the usefulness of a radio telescope on the far side of the moon.
The first feature has to do with limiting the sheer amount of material that is needed to construct a radio telescope. LCRT’s proposed instrument would be a one kilometer wide circle in a three kilometer wide crater. Traditional radio telescopes, such as the Five-hundred-meter Aperture Spherical Telescope (FAST) and the recently destroyedArecibo Observatory use hundreds of radio-reflective panels to any signals to an observing platform suspended by cable above the receiving
In order to complete a 1km wide telescope, thousands of reflecting panels would have to be created on Earth, launched into space, and then placed precisely where they need to go. That’s a lot of launches and a lot of weight, and it made the entire concept of a lunar radio telescope untenable.
Artist’s concept of what a completed LCRT would look like. Credit: Vladimir Vustyansky
Dr. Bandyopadhyay’s solution to this problem is to use a wire mesh instead of solid panels to reflect the radio waves to the antenna. This mesh would be much lighter, and less bulky, but will still need to be set precisely in order to work properly. For that, the team turned to their other novel solution – dual robots.
Roboticists at JPL, of which Dr. Bandyopadhyay is one, have been working on a concept called DuAxel. These robots have two separate configurations. In one, they look like a standard four wheeled rover. In the other, the two halves separate. One anchors itself to a specific point while the other uses a tether to ease itself into otherwise unreachable terrain.
Image of the two halves of a DuAxel rover working together. Credit: NASA / JPL-Caltech / J.D. Gammell
Crater walls would likely be such unreachable terrain, so having a robot that is able to access both the bottom of the crater and up above the rim where any landed supplies would be located is invaluable to any such telescope mission. It would also allow the robots to mount the antenna, the critical sensing piece of the telescope, above the crater’s center by applying tension in the mounting wires and lifting it into position.
Some major hurdles still remain, two of which will be the focus of this Phase II NIAC grant. The first is the design of the wire mesh network. It’s physical structure has to be exactly right in order for the telescope to work properly. In addition, it must be able to withstand the extreme temperature differences on the moon, which swing between -173 C and +127 C. If the mesh warps even slightly, the whole project could fail.
DuAxels in an operational test in the Mojave. Credit: JPL YouTube Channel
DuAxels themselves pose another quandary – should they be automated or have some sort of human intervention. Are they the only tools needed for the massive undertaking of constructing the largest ever radio telescope?
While Dr. Bandyopadhyay and his team work out these questions other factors put a time limit on the possibility of constructing a telescope in this most unique of locations. Part of the appeal of the far side of the moon is its lack of interference from artificial radio sources. However, that silence is not guaranteed. Already there is a satellite orbiting there, and other missions could be planned in the near future that would add confounding signals to the data mix.
Presentation by Dr. Banyopadhyay on the LCRT concept for a NIAC meeting. Credit: Saptarshi Bandyopadhyay YouTube Channel
That being said, the LCRT is still a long way from reality, and in its press release NASA is quick to point out that it hasn’t been accepted as a full NASA mission. But the intent of the NIAC program is to develop concepts to the point where they could become one. With that in mind, the extra half a million dollars will keep pushing the concept forward and hopefully result in a Phase III grant, which would then transition into a fully fledged NASA program after an additional two years of study. Though it might take awhile, the benefits of having such a massive telescope in one of the most radio quiet place in the solar system cannot be understated.
The Moon race (part deux) is officially in full swing now with Japan, India, China, and even a private corporation making their marks on the surface. The calendar is packed with a whole slew of planned missions in the coming months and years to set the stage for a more sustained presence on the lunar surface. But some astronomers want to use the Moon for something perhaps less expendable than water ice — sorry, fans of For All Mankind — or a cosmic home base: a vantage point to peer into Cosmic Dark Ages.
NASA | New Craters on the Moon
Getting a look at the Cosmic Dark Ages — the period when the early universe was covered in pure darkness — has long been a holy grail for astronomers. It could tell us about the most fundamental aspects of our Universe and potentially help solve mysteries that puzzle us today.
“This is a wonderful place to look for any new physics,” says Jack Burn, a University of Colorado physicist, including understanding “the nature of dark matter, and maybe early dark energy, and really probe and test our fundamental models of cosmology and physics.”
But to see back into the Cosmic Dark Ages you need a very dark place indeed, free from a radiation-blocking ionosphere and away from the constant chatter we create here on Earth. This is why astronomers like Burns and the Jet Propulsion Laboratory’s Joseph Lazio have plans to build radio telescopes on the far side of the Moon.
If engineers and astronomers at private companies, universities, NASA’s Jet Propulsion Laboratory, and Brookhaven National Laboratory have their way, the far side of the moon could soon be the spot from which astronomers stare 13 billion years back in time, to an era before the first stars were born. Teams of scientists worldwide are developing concepts to build huge radio telescopes on the far side of the Moon, and the first prototype could launch as early as 2025, with more rudimentary telescopes set to go even sooner. Here’s a look at the race so far.
“If We Didn’t Have a Moon, We’d Have to Build It”
In the beginning, as hydrogen gas drifted through the darkness of the early Universe, atoms occasionally bumped into each other, releasing energy in the form of radio waves. The radio waves from those dark clouds of gas were 21 centimeters long (that’s just the natural wavelength that hydrogen atoms emit, and they’re very consistent about it). But those radio waves have spent billions of years crossing a rapidly expanding universe, and that journey has stretched them out until they’re several meters long.
Charged particles in an upper layer of Earth’s atmosphere, called the ionosphere, block radio waves longer than about 10 meters, so it’s impossible to study the Cosmic Dark Ages with a telescope here on Earth. And radio telescopes, especially ones meant to map the sources of such long radio waves, have to be much too large to build in space. You need something like a planet, but without an ionosphere – or all the radio noise that surrounds our busy, high-tech world.
Burns has argued for decades that the far side of the Moon is the best of both worlds. There’s solid ground to build on, but there’s no ionosphere to block incoming radiation, and the whole bulk of the Moon (2,000 miles of solid rock) would shield the telescope from Earth’s constant radio noise and – for two weeks out of every month, during the lunar night – the Sun’s radio emissions, too.
“It's the ideal place,” says Burns. “If we didn't have a moon, we'd have to build it.”
This illustration shows what FarView’s zigzagging array of antennas might eventually look like
Ronald Polidan/NASA
Fortunately, we don’t have to build the Moon — just the observatory. Burns is working with Texas-based Lunar Resources, Inc. on a project called the Farview Observatory, which will — if everything goes according to plan — be a 5-square-mile array of radio antennas sprawling across a lunar plain. Picture an antenna something like an old-fashioned television antenna; now picture roughly 100,000 of them, lined up end-to-end in a series of zig-zags. Combined, those antennas will act as one giant radio receiver, listening for faint signals from the Cosmic Dark Ages.
Meanwhile, at JPL, a team led by JPL robotics technologist Saptarshi Bandyopadhyay is working on the Lunar Crater Radio Telescope, which has the same scientific goal as Farview but will look very different. LCRT would be a semicircle of wire mesh about a third of a mile wide, lining the bottom of a 1.9-mile-wide crater on the Moon. The result will be a radio dish similar to Arecibo (the large, now-shuttered observatory in Puerto Rico), but with bare wires instead of the aluminum panels that lined Arecibo’s crater.
This artist’s illustration shows what the Lunar Crater Radio Telescope might eventually look like, with a receiver suspended over a radio dish set in a lunar crater.
Vladimir Vustyansky, JPL
Comparing these two possible Moon telescopes is similar to comparing Earth-based telescopes like the Very Large Array (VLA) and China’s Five-hundred-meter Aperture Spherical Telescope (FAST). The VLA is an array of dish-shaped radio antennas lined up across a swath of New Mexico desert. It turns out that if you line up several radio receivers (or mirrors, if you’re studying shorter wavelengths like infrared or visible light), and connect them with the right software, those individual antennas can add up one giant telescope. Astronomers call this an interferometer.
FAST and the LCRT, like the now-defunct Arecibo, are something called single-aperture, or filled-aperture, telescopes. FAST is one enormous radio dish, set into a crater that provides structural support for the dish (and the delightful irony of using a crater formed by a meteor impact to study other objects in space).
Each design has its advantages. An interferometer like the VLA or Farview can see the universe in much higher resolution than a filled-aperture telescope like FAST or LCRT, because the interferometer is wider. But the tradeoff is that a filled-aperture telescope like FAST or LCRT can "see" fainter signals than an interferometer, because it's got an entire surface to catch them with. Neither is a “better” option than the other; radio astronomers here on Earth rely on both types of telescope to scan the skies.
A Truly High-Tech Construction Crew
During a field test in the Mojave Desert, the DuAxel robot separates into two single-axled robots, connected by a tether, so that one can rappel down a steep slope.
NASA/JPL-Caltech/J.D. Gammell
There’s one thing both telescope designs require: robotic construction teams. The LCRT team plans to use pairs of rappelling construction robots, developed at JPL, to lay the mesh grid in the base and along the sides of their chosen crater. Each pair of robots — together called a DuAxel — will be linked by a tether. One robot will anchor itself on the rim of the crater, while its partner rappels down the crater’s side to actually lay out the mesh for the telescope.
Farview, meanwhile, has even more ambitious plans for its robotic builders, starting with making the array’s 100,000 antennas from scratch, using aluminum extracted from lunar regolith (the dusty, ground-up rock that covers the lunar surface). The goal, says Burns, is to reduce the amount of material that has to be launched to the Moon from Earth.
And both telescopes will depend on a satellite in lunar orbit to send data home to Earth, since the far side of the Moon is constantly pointed out into the vastness of space, which is the whole point.
At the moment, both are in their second phase of development under a program called NASA Advanced Innovative Concepts, which funds projects that work out the engineering and science details of possible future missions like Farview and LCRT. Farview’s team will spend the next two years devising the best antenna layouts, narrowing down mission requirements, and tackling other engineering issues. They’ll also ask more specific science questions and plan how to use Farview to answer them. At JPL, the LCRT team is busy working on similar problems.
One Small Step For A Lunar Lookout
One or the other of the more ambitious observatory concepts could be ready to launch to the Moon by the late 2030s, but there are no guarantees.
Meanwhile, the first telescope to land on the Moon was a much smaller, much simpler version of a radio telescope: a crossed pair of antennas, spanning about 20 feet, called Radio wave Observation at the Lunar Surface of the photoElectron Sheath (ROLSES). ROLSES landed near the south pole of the Moon aboard Intuitive Machines’ Odysseus Lander earlier this year. Its goal was to study the background radiation that already exists on the Moon. (Most of that radiation comes from our Sun, but that’s likely to change soon, since nearly everyone with a space program seems to be aiming to set up shop near the lunar south pole.) Its other goal is to simply prove that a radio telescope could work on the Moon
“These are all kinds of multi-billion dollar projects that I think are, in some sense, ahead of their time,” Brookhaven National Laboratory physicist An¸e Slosar tells Inverse. “You're not going to get a $2 billion project unless you can at least prove the principle at some point.”
This illustration shows what LuSEE-Night might look like perched atop its lander.
Firefly Aerospace
Near the end of 2025, a similar telescope called the Lunar Surface Electromagnetic Experiment – Night (LuSEE-Night) is scheduled for launch aboard a Firefly Aerospace rocket. If all goes well, it will touch down on the far side of the Moon in January 2026.
Like ROLSS, LuSEE-Night will be a fairly simple telescope: a pair of 20-foot-wide radio antennae, spring-loaded and mounted on a turntable. But LuSEE-Night will try to last through a two-week-long lunar night. To do that, it will carry a 110-pound battery, heavily insulated against the deep cold of lunar darkness.
“The main role of LuSEE-Night is really to test this theoretical promise – whether the Moon really is such a great place to do observation,” says Slosar. “Maybe the Moon has more ionosphere than we thought; maybe there are plasma tracks; maybe there are micrometeorites; maybe there's something we haven't thought about. Really, there is this kind of notion that the Moon is the best place, but nobody has tested it.”
LUSEE-Night will do some real science, too. It’s too small to capture the long, slow radio waves rippling in from the Cosmic Dark Ages, but it will also be astronomers’ first chance to test their models of what the galaxy should look like at low radio frequencies they can’t see from Earth.
Once we have eyes on the moon, there’s no telling what we’ll be able to see.
Stars, like the Sun, are remarkably constant. They vary in brightness by only 0.1 percent over years and decades, thanks to the fusion of hydrogen into helium that powers them. This process will keep the Sun shining steadily for about 5 billion more years, but when stars exhaust their nuclear fuel, their deaths can lead to pyrotechnics.
Supernovae happen across the Milky Way only a few times a century, and these violent explosions are usually remote enough that people here on Earth don’t notice. For a dying star to have any effect on life on our planet, it would have to go supernova within 100 light years from Earth.
In my writing about cosmic endings, I’ve described the threat posed by stellar cataclysms such as supernovae and related phenomena such as gamma-ray bursts. Most of these cataclysms are remote, but when they occur closer to home, they can pose a threat to life on Earth.
The death of a massive star
An image of Cassiopeia A, the remains of a massive star that exploded roughly three centuries ago.
The dying star emits high energy radiation as gamma rays. Gamma rays are a form of electromagnetic radiation with wavelengths much shorter than light waves, meaning they’re invisible to the human eye. The dying star also releases a torrent of high-energy particles in the form of cosmic rays: subatomic particles moving at close to the speed of light.
Supernovae in the Milky Way are rare, but a few have been close enough to Earth that historical records discuss them. In 185 A.D., a star appeared in a place where no star had previously been seen. It was probably a supernova.
Observers around the world saw a bright star suddenly appear in 1006 A.D. Astronomers later matched it to a supernova 7,200 light years away. Then, in 1054 A.D., Chinese astronomers recorded a star visible in the daytime sky that astronomers subsequently identified as a supernova 6,500 light years away.
At 600 light years away, the red supergiant Betelgeuse in the constellation of Orion is the nearest massive star getting close to the end of its life. When it goes supernova, it will shine as bright as the full Moon for those watching from Earth, without causing any damage to life on our planet.
Radiation damage
An image taken by the Hubble Space Telescope of a star that exploded roughly 8,000 years ago
NASA
If a star goes supernova close enough to Earth, the gamma-ray radiation could damage some of the planetary protection that allows life to thrive on Earth. There’s a time delay due to the finite speed of light. If a supernova goes off 100 light years away, it takes 100 years for us to see it.
Astronomers have found evidence of a supernova 300 light-years away that exploded 2.5 million years ago. Radioactive atoms trapped in seafloor sediments are the telltale signs of this event. Radiation from gamma rays eroded the ozone layer, which protects life on Earth from the Sun’s harmful radiation. This event would have cooled the climate, leading to the extinction of some ancient species.
Safety from a supernova comes with greater distance. Gamma rays and cosmic rays spread out in all directions once emitted from a supernova, so the fraction that reach the Earth decreases with greater distance. For example, imagine two identical supernovae, with one ten times closer to Earth than the other. Earth would receive radiation that’s about a hundred times stronger from the closer event.
A supernova within 30 light-years would be catastrophic, severely depleting the ozone layer, disrupting the marine food chain, and likely causing mass extinction. Some astronomers guess that nearby supernovae triggered a series of mass extinctions 360 to 375 million years ago. Luckily, these events happen within 30 light years, only every few hundred million years.
Left behind after a supernova explosion, neutron stars are city-size balls of matter with the density of an atomic nucleus, so 300 trillion times denser than the Sun. These collisions created many of the gold and precious metals on Earth. The intense pressure caused by two ultradense objects colliding forces neutrons into atomic nuclei, which creates heavier elements such as gold and platinum.
A neutron star collision generates an intense burst of gamma rays. These gamma rays are concentrated into a narrow jet of radiation that packs a big punch.
If the Earth were in the line of fire of a gamma-ray burst within 10,000 light years, or 10% of the diameter of the galaxy, the burst would severely damage the ozone layer. It would also damage the DNA inside organisms’ cells at a level that would kill many simple life forms like bacteria.
Gamma-ray bursts may not hold an imminent threat to life on Earth, but over very long time scales, bursts will inevitably hit the Earth. The odds of a gamma-ray burst triggering a mass extinction are 50% in the past 500 million years and 90% in the 4 billion years since there has been life on Earth.
The most extreme astrophysical events have a long reach. Astronomers were reminded of this in October 2022 when a pulse of radiation swept through the solar system and overloaded all of the gamma-ray telescopes in space.
It was the brightest gamma-ray burst to occur since human civilization began. The radiation caused a sudden disturbance to the Earth’s ionosphere, even though the source was an explosion nearly 2 billion light years away. Life on Earth was unaffected, but the fact that it altered the ionosphere is sobering – a similar burst in the Milky Way would be a million times brighter.
NASA: First ‘human-made meteor shower’ will light up Earth skies
NASA: First ‘human-made meteor shower’ will light up Earth skies
Story by Eric Ralls
NASA: First ‘human-made meteor shower’ will light up Earth skies
Ever had that moment when you throw a rock into a pond and observe the ripples moving away from the spot? Now, imagine something similar happening, but on a much bigger scale -- in space. That's what happened when NASA's DART spacecraft made history by altering the path of a gigantic space rock hurling through the cosmos.
DART mission makes history
In 2022, DART made more than just ripples, it made waves of debris in space. It strategically collided with the Dimorphos asteroid, causing a ripple effect that shifted its orbit around its larger sibling, the Didymos asteroid.
The interaction didn't just stop there. The impact kicked up an astronomical dust storm, a cloud of debris that may soon become a tad bit personal for us Earthlings and our rusty neighbor, Mars. The most recent models suggest that some of the smaller meteoroids from this debris might make their way to both Earth and Mars.
Not to worry, though. The debris shower won't be disastrous, but rather a sight to behold, quite safely from our terrains.
Planetary defense collaboration
With a diameter of about 160 meters, the small moon Dimorphos orbits the larger body Didymos in what is known as a binary asteroid system.
The DART spacecraft, or the Double Asteroid Redirect Test, made contact with Dimorphos on September 26, 2022.
The outcome? A significant shortening of Dimorphos' orbit around Didymos by half an hour. It was the first act in an international planetary defense collaboration - a literal game-changer.
Related video:
Terrifying NASA Update: Doomsday Asteroid Heading Towards Earth in 2024!
If This Asteroid Hits Earth then we will all Die | NASA Warns About Asteroid coming in 2038
Hera will investigate further
Now, who's going to clean up this mess? Enter ESA's Hera spacecraft. Scheduled for launch this October, Hera will reach Dimorphos for a close-up "crash scene investigation," following the DART mission's impact.
"The DART impact offers a rare opportunity to investigate the delivery of ejecta to other celestial bodies, thanks to the fact that we know the impact location and that this impact was observed by the Italian LICIACube deployed from DART as well as by Earth-based observers," said ESA Hera mission scientist and co-author of this exciting development, Michael Kueppers.
Will DART debris reach Earth?
To understand how the debris from the Dimorphos impact might reach us, it's essential to assess its speed.
"Our results indicate the possibility of ejecta reaching the gravitational field of Mars in 13 years for launch velocities around 450 m/s, while faster ejecta launched at 770 m/s could reach its vicinity in just seven years," explained Eloy Peña-Asensio, lead author of the study.
"Particles moving above 1.5 km/s could reach the Earth-Moon system in a similar timescale."
However, whether the debris would indeed make it to Mars or Earth is subject to several factors. In essence, the location of the debris in the impact plume plays a deciding role.
A human-made meteor shower
"In the coming decades, meteor observation campaigns will be crucial in determining whether fragments of Dimorphos, resulting from the DART impact, will reach our planet. If this happens, we will witness the first human-made meteor shower," noted Peña-Asensio.
As for the consequential meteoroids, the largest ones would likely be about the size of a softball. These larger particles would burn up in Earth's atmosphere. However, they might manage to slip through the thinner Martian atmosphere.
However, it's the smaller particles that move at higher speeds which stand a chance to reach the Earth's atmosphere. But there's no need to panic. We have plenty of time and resources to track the debris and ensure our safety.
Significance of the DART mission
The significance of the DART impact is not solely about potential meteor showers or altered space debris routes. It's also about the human spirit of curiosity, exploration, and conquering new frontiers.
"Our accurate knowledge of the impact site and impactor properties in terms of size, mass, and velocity plus the observations of the ejecta are what allowed us to estimate the long-term fate of the material leaving the Didymos system," said Michael Kueppers.
Hera, named after the Greek goddess of marriage, is expected to begin its investigation of the asteroid pair in late 2026. According to ESA, the spacecraft will perform high-resolution mapping of Dimorphos, providing extremely valuable information for future asteroid deflection missions and science.
DART Impact
The last complete image of asteroid moonlet Dimorphos was taken by the DRACO imager on NASA's DART mission at a distance of about 7 miles (12 kilometers) and 2 seconds before impact.
Minute by minute, what would happen if a world-destroying asteroid was detected coming to Earth - after 'greenish' space fireball crashed into our planet this week
Minute by minute, what would happen if a world-destroying asteroid was detected coming to Earth - after 'greenish' space fireball crashed into our planet this week
NASA's radar gives off a ping, notifying scientists that a world-destroying asteroid has been detected and could hit Earth in 10 years.
World governments are quickly alerted about a potentially catastrophic event, allowing them to formulate a plan to inform the public.
One year before impact, space agencies from every country launch nuclear deflection missiles with hopes of pushing the giant asteroid away from our planet - but the mission fails.
FEMA orders mass evacuations in the impact zone months in advance and the public is told to expect the worst with hours left on the clock.
While NASA has said such a scenario is unlikely to happen in the near future, an asteroid hit Earth this week and was detected only eight hours before impact.
An asteroid hit Earth on Thursday that was detected on eight hours before impact. However, NASA would have about 10 years to save the world from a world-destroying space rock
Most asteroids are not on track to hit Earth - but in the event that one is, here above is the sequence of events that would spring into action after the space rock is spotted
The small space rock that soared over the Philippines on Thursday was only three feet in diameter, which was not large enough to sound any alarms.
A report published by the White House in 2021 recommended that a reconnaissance mission would be necessary if an asteroid measuring at least 165 feet could hit Earth within 50 years is detected.
The document categorized a 3,300-foot-wide asteroid as a 'possible global catastrophe,' a three-mile-wide space rock as 'above the global catastrophe threshold,' and a six-mile-wide object as capable of causing a 'mass extinction.'
However, NASA, FEMA, and the United Nations conducted an exercise in April to assess how prepared Earth would be if a world-destroying asteroid were detected, finding that we would need at least 14 years' notice.
Detecting the world-destroying asteroid - 10 years out
NASA's ground-based telescopes identify the giant asteroid, comparing it with other space rocks in a database to ensure it is newly discovered.
The space agency has several projects that scan the skies, including the Catalina Sky Survey which spotted Thursday's asteroid.
These early-warning systems also include NEOWISE (Near-Earth Object Wide-field Infrared Survey Explorer), a spacecraft equipped with a wide-field, 20-inch infrared telescope that operates in two wavelength ranges.
Once the object is detected, astronomers look at the data for brightness and movement to double-check that it is not a known one.
Teams then report their findings to the Minor Planet Center (MPC), the single worldwide location for reporting asteroids, minor planets and comets.
The MPC and NASA team up to determine the asteroid's orbit to predict if the path poses a threat to Earth.
The team discovers that the space rock is likely to come within five million miles of our planet and sends alerts to other agencies around the world, according to NASA.
Now that the world is aware of the impending threat, space agencies from every country join forces to deflect the asteroid about two years after detection.
A report published by the White House in 2021 categorized asteroid sizes, deeming one at least 3,300 feet wide could be catastrophic
The scenario begins with NASA detecting a world-destroying asteroid 10 years before it hits Earth. The agency has telescopes around the globe, like Catalina Sky Survey in Arizona that detected Thursday's asteroid that hit our planet
Launching an asteroid deflection - two to five years before impact
NASA tested a strategy in 2022 called the Double Asteroid Redirection Test (DART) that plowed into an asteroid at 14,000 miles per hour, leaving a massive plume of dust and rocks, and successfully altering its trajectory.
That asteroid did not threaten our planet, but the space agency could use the strategy to deflect the world-destroying asteroid.
This February, however, NASA's planetary defense chief warned that a DART-like mission would not be able to get off the ground if the impact needed to occur in less than five years.
Leading up to the launch of humanity's Hail Mary, NASA and international partners are studying a range of options, including a spacecraft and nuclear weapons.
The group decides to attack the asteroid with nuclear bombs about five years after detection and begins testing a prototype.
Then, two years before impact, teams send explosives and a detonation device at some short standoff distance from the asteroid.
Kaliat Ramesh, a professor of mechanical engineering and material science at Johns Hopkins University, told VOX: 'We would estimate that it would take energy equivalent to about 200 gigatons of TNT to fully disrupt an asteroid with a 12-mile diameter.'
One gigaton is equal to one billion tons of TNT, which means we would need 10 million Hiroshima-size bombs to destroy the massive asteroid hurtling toward Earth.
The only rockets capable of carrying such massive payloads of nuclear bombs would likely be NASA's Space Launch System (SLS) and Elon Musk's SpaceX Starship, but neither have been proven in this type of mission.
One year before impact, space agencies from every country launch nuclear deflection missiles with hopes of pushing the massive asteroid away from our planet
Billy Bob Thornton as Dan Truman, a a scientist at NASA, in Armageddon. Although a trope of sci-fi films, deflecting asteroids bound for Earth is a real concern
The nuclear option would be faster, a concept familiar to fans of the 1998 film Armageddon, starring Bruce Willis and Ben Affleck.
In the movie, NASA sends a group of deep-sea drillers to blow up an Earth-bound asteroid and save humanity with just 18 days of lead time.
Evacuation Plan - months to hours before impact
In the months leading up to impact, global organizations like the Planetary Defense Coordination Office (PDCO) would create detailed impact scenarios, estimating the destruction radius, atmospheric effects and potential global consequences.
Refined calculations forecasting the exact spot where an asteroid would impact Earth would, however, only become available as the asteroid comes into radar range, a process that new deep-space radar could accelerate.
FEMA would order evacuations around the impact zone to save as many lives as possible
And hours before the asteroid makes impact, the world will be told to shelter-in-place and hope for the best
The information collected by global organizations is sent to FEMA and other emergency groups to alert people in the impact zone, allowing for mass evacuations months before the space rock smashes into Earth.
Teams would also begin formulating rescue plans and assembling relief teams that would be deployed almost immediately after impact to salvage as many lives as possible.
A NASA report published in 2023 estimated that everyone within 300 miles of the impact zone, about 150 million people, 'would need to either evacuate or find an appropriate shelter or build one.'
As the clock ticks down to hours, the public would be ordered to shelter in place while they receiving continuous updates and directions.
After impact
The asteroid impact would cause widespread devastation, triggering tsunamis that devastate coastal regions and massive shockwaves and earthquakes.
Electrical and communication systems around the globe fail almost instantly.
The plan to save Earth would include a deflection strategy, evacuations and shelter-in place
The sun has been blocked by a massive dust plume released from impact, causing a significant drop in temperatures and a 'nuclear winter' that could last for decades.
Earth would be shrouded in darkness as massive fires rage that deplete oxygen levels.
Billions of people are dead, but those who did survive are now suffering from starvation, freezing temperatures and the collapse of civilization’s infrastructure.
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Boeing's Starliner has returned to Earth empty after leaving two astronauts who rode the spaceship up to the International Space Station stranded until next year.
The space capsule touched down at the White Sands Space Harbor in New Mexicotoday at approximately 4am GMT, around six hours after departing the ISS on Friday.
It was due to return to earth much earlier, having launched in June for what was meant to be a roughly weeklong test mission with astronauts Butch Wilmore and Suni Williams on board.
But unexpected thruster malfunctions and helium leaks on its way up derailed those plans and NASA ultimately decided it was safer to bring the pair back on a spacecraft from rival Elon Musk's SpaceX.
The next scheduled SpaceX flight is not until February next year, meaning Wilmore and Williams will be stranded in space for another six months.
Boeing and NASA teams working around NASA's Boeing Crew Flight Test Starliner spacecraft after it landed at White Sands, New Mexico, on Saturday
Boeing's Starliner lands at the landing site at White Sands Space Harbor in White Sands, New Mexico
Astronauts Butch Wilmore and Suni Williams were initially planned to depart on the Starliner, but issues with the capsule's thrusters have delayed their return until at least February 2025
Ground teams reported hearing sonic booms as it streaked red hot across the night sky, having endured temperatures of 3,000F (1,650C) during atmospheric reentry.
A smooth, uneventful ride was seen as critical not only for salvaging some pride but also for Boeing's prospects of achieving certification in the future.
The century-old aerospace giant had carried out extensive ground testing aimed at replicating the technical issues the spaceship had experienced on its ascent and devised plans to prevent more problems.
With its reputation already battered by safety concerns affecting its passenger jets, Boeing made assurances in public and in private that it could be trusted to bring the astronauts home - an assessment not shared by NASA.
'Boeing believed in the model that they had created that tried to predict the thruster degradation for the rest of the flight,' Steve Stich, program manager for NASA's Commercial Crew Program, told reporters this week.
But 'the NASA team, due to the uncertainty in the modeling, could not get comfortable with that,' he added, characterizing the mood during meetings as 'tense.'
Starliner capsule fires its thrusters as it pulls away from the International Space Station on Friday, September 6
The gumdrop-shaped capsule touched down softly at the White Sands Space Harbor in New Mexico, its descent slowed by parachutes and cushioned by airbags
Shortly after undocking, Starliner executed a powerful 'breakout burn' to swiftly clear it from the station and prevent any risk of collision - a maneuver that would have been unnecessary if crew were aboard to take manual control if needed.
Following that, mission teams conducted thorough checks of its thrusters in preparation for the critical 'deorbit burn,' required to guide the capsule onto its reentry path around 40 minutes before landing.
While expectations were high that Starliner would stick the landing, as it had in two previous uncrewed tests, NASA will now carefully review all aspects of the mission's performance before deciding on the next steps.
NASA awarded Boeing and SpaceX multibillion-dollar contracts over a decade ago to develop spacecraft to taxi astronauts to and from the ISS, after the end of the Space Shuttle program left the US space agency reliant on Russian rockets.
Although initially considered the underdog, Elon Musk's SpaceX surged ahead of mighty Boeing, successfully flying dozens of astronauts since 2020.
The Starliner program, meanwhile, has faced numerous setbacks.
The space capsule touched down at the White Sands Space Harbor in New Mexico today at approximately 4am GMT, around six hours after departing the ISS on Friday
Boeing and NASA teams working around NASA's Boeing Crew Flight Test Starliner spacecraft after it landed uncrewed at White Sands, New Mexico
A full timeline of Boeing's Starliner program, from the singing of their massive contact to the incident that left two astronauts stranded aboard the ISS
In 2019, during its first uncrewed test flight, a software glitch prevented the capsule from rendezvousing with the ISS. A second software issue, which could have caused a catastrophic collision between its modules, was caught and fixed just in time.
In 2021, with the rocket poised on the launchpad for another attempt, blocked valves forced yet another postponement.
The capsule finally reached the ISS in May 2022 on a non-crewed flight, but further issues, including weak parachutes and flammable tape in the cabin that needed removal, delayed the crewed test.
For the current mission, astronauts Wilmore and Williams had been strapped into their seats and ready to fly twice before last-minute 'scrubs' due to technical glitches sent them back to their quarters.
The one metre (3ft) wide asteroid was spotted just eight hours before it burned up over the Philippines in a spectacular fireball.
Luckily, the asteroid, named 2024 RW1, was too small to cause any damage.
However, its sudden arrival is a stark reminder of the dangers lurking within our solar system.
From the so-called 'Valentine's Day asteroid' to the deadly space rocks almost a mile wide, experts warn that several asteroids are at risk of smashing into Earth.
From the so-called 'Valentine's Day asteroid' to the deadly space rocks almost a mile wide, experts warn that several asteroids are at risk of smashing into Earth
Scientists around the world were caught off guard on Wednesday as a previously undetected asteroid collided with Earth's atmosphere
The 6 asteroids that could hit Earth
1. Bennu
Diameter: 1,574 ft
Odds of collision: 1/2,700 on September 24, 2182
2. 1950 DA
Diameter: 6,561 ft
Odds of collison: 1/34,500 on March 16, 2880
3. 2023 TL4
Diameter: 1,083 ft
Odds of collision: 1/181,000 on October 10, 2119
4. 2007 FT3
Diameter: 2,165 ft
Odds of collision: 1/11.5 million on October 5, 2024
5. 2023 DW
Diameter: 166 ft
Odds of collision: 1/1,584 on February 14, 2046
6. 1979 XB
Diameter: 2,165 ft
Odds of collision: 1/1.8 million on December 14, 2113
Asteroids colliding with Earth is far from an uncommon event.
In fact, NASA estimates that about 48.5 tonnes of meteoric material falls on Earth each day.
However, the vast majority of these objects simply burn up in the atmosphere to produce the flashing lights we recognise as shooting stars.
Objects large enough to punch through the atmosphere and actually collide with Earth are far rarer and don't often come within Earth's orbit.
Even smaller rocks can have a devastating impact, as shown by the Chelyabinsk meteor, a 59 ft (18m) wide asteroid which exploded over Russia in 2013.
Despite being hundreds of times smaller than the meteor that killed the dinosaurs, the resulting shockwave injured 1,500 and damaged 7,300 buildings.
Due to these risks, NASA and the European Space Agency (ESA) operate programs aimed at identifying, categorising, and tracking so-called Near Earth Objects (NEOs).
Currently, ESA has 1,634 NEOs on its 'risk list' - meaning that there is a non-zero chance these objects will hit Earth.
However, at present no asteroid is ranked above one on the Torino Scale - a chart which ranges from 0 (won't hit Earth) to 10 (will hit Earth, and will be catastrophic).
The Earth has been hit by devastating asteroids in the past such as the Chicxulub asteroid, which slammed into a shallow sea in what is now the Gulf of Mexico around 66 million years ago, creating an explosion that wiped out the dinosaurs
Experts say that another asteroid impact with Earth is a matter of when, not if (stock image)
If it were to collide with the planet, it would release energy equivalent to 1.4 billion tonnes of TNT.
Professor Dante Lauretta of the University of Arizona previously said that an impact with Bennu would release 'three times more energy than all nuclear weapons detonated throughout history'.
While this might not be quite enough to create the type of planet-destroying force which wiped out the dinosaurs it could still lead to millions of deaths.
The asteroid Bennu (pictured) is considered to pose the biggest threat to Earth and could hit our planet within the next 200 years
This revealed that Bennu may contain the building blocks of life - including possible sources of water.
2.2023 DW - The Valentine's Day asteroid
Forgetting the chocolates and flowers on Valentine's Day 2046 might be the least of your worries.
The asteroid 2023 DW is predicted to have a significant chance of colliding with Earth on February 14, 2046 - just in time to ruin your date plans.
At 166ft (50m) across, 2023 DW is about the same size as the asteroid that caused the devastating Chelyabinsk event back in 2013.
The Valentine's Day asteroid, 2023 DW, (pictured) has a slim possibility of hitting Earth on February 14, 2046
Given that the asteroid has been observed moving at 21.78 km/s relative to the sun, it could hit Earth with enough force to level an entire city.
When it was initially discovered, space agencies gave this collision worryingly strong odds of one in 607.
However, with more careful observation that risk has now been considerably lowered.
Last year Richard Moissl, head of the ESA's planetary defence office, further reduced the odds of the asteroid hitting Earth from one in 784 to one in 1,584.
Moissi previously told MailOnline: 'It will go down now with every observation until it reaches zero in a couple of days at the latest. No one needs to be worried about this guy.'
The 165-foot (50 m) space rock was given a one in 560 chance of impact but experts say it is now almost certain to miss the Earth
For NASA to consider something a 'potentially hazardous object', it needs to be 460 feet (140 meters) in size with an orbit that brings it as close as within 4.6 million miles (7.5 million kilometres) of Earth's orbit around the Sun.
At 4,265ft (1.3km) in diameter and weighing 71 million tonnes, asteroid 1950 DA is over 90 times that size.
This makes 1950 DA the biggest asteroid that has a serious chance of colliding with our planet.
If it were to hit, the collision would release energy equivalent to detonating 75 billion tons of TNT - enough to trigger a global catastrophe like the one that wiped out the dinosaurs.
Currently, the asteroid is believed to have a one in 34,500 chance of hitting Earth on March 16, 2880.
In 2032, it will come within 6,959,357 miles (112,000,000 km) of Earth - a relatively close pass allowing for further observations.
Over the eight generations until 1950 DA reached Earth, a small disturbance could easily send it a safe distance from Earth.
A NASA spokesperson previously told MailOnline: 'If it is eventually decided 1950 DA needs to be diverted, the hundreds of years of warning could allow a method as simple as dusting the surface of the asteroid with chalk or charcoal, or perhaps white glass beads, or sending a solar sail spacecraft that ends by collapsing its reflective sail around the asteroid.
'These things would change the asteroid reflectivity and allow sunlight to do the work of pushing the asteroid out of the way.'
The asteroid 1950 DA has the potential to wipe out life on Earth. Based on its predicted orbit (pictured) the asteroid has a 1 in 34,500 chance of hitting Earth on March 16, 2880
Another asteroid which also has humanity-destroying potential is 2023 TL4.
After being spotted last year, scientists immediately recognised this huge asteroid as one of the biggest threats to Earth.
The space rock measures 1,083ft (0.33km) in diameter and is believed to weigh 43 million tonnes - more than 4,500 times the weight of the Eiffel Tower.
On collision, this could create a blast 150 times more powerful than that of the Tsar Bomba, the most powerful nuclear weapon ever detonated.
Current estimates suggest that there is a one in 181,000 chance of this asteroid colliding with Earth on October 10, 2119.
Just like 1950 DA, this should give space agencies enough time to push the asteroid off its course, should it appear to be on its way to Earth.
The space rock 2023 TL4 measures 1,083ft (0.33km) in diameter and is believed to weigh 43 million tonnes - more than 4,500 times the weight of the Eiffel Tower. Its orbit (pictured) will bring it dangerously close to Earth in 2119
5. 2007 FT3
While the odds of 2007 FT3 hitting Earth are low, it has the unwelcome distinction of being the asteroid with the chance of hitting Earth soonest.
If we get incredibly unlucky, this 2,165ft (0.34km) asteroid could hit Earth as soon as October 5th this year.
However, current observations of 2007 FT3's path give this only a one in 11.5 million chance of occurring.
The asteroid has slightly better odds of colliding with Earth on March 3, 2030, with a one in 10 million chance.
Although that may seem low, the odds of winning the Lotto jackpot are one in 45 million and many people still buy tickets each week.
Since the odds are higher than zero, the object is still on ESA's risk list and is considered a potentially hazardous object.
The asteroid 2007 FT3 could hit Earth as soon as October this year, however the odds are only one in 11.5 million
The final object with a chance of causing serious damage to Earth is an asteroid called 1979 XB.
At 2,165ft (0.34km) in diameter and weighing 49 million tonnes, should 1979 XB hit Earth, it would easily be capable of destroying an entire city.
First spotted in 1979, scientists believe that this asteroid currently has a one in 1.8 million chance of hitting Earth.
What makes 1979 XB scary is that it has essentially been 'lost' since its discovery.
No one has observed 1979 XB in 40 years and so its orbit is poorly understood.
What predictions we do have are based on the initial observations taken immediately after its discovery.
Given that Earth was just hit by a previously undetected asteroid, this might leave many feeling understandably anxious.
The asteroid 1979 XB is scarier than most since it has been 'lost' for 40 years. The predictions we have of its orbit (pictured) are only based on observations taken shortly after its discovery which makes its true danger a mystery
How much danger are we really in?
Despite how scary these figures may seem, most scientists agree that the Earth is safe for now.
Dr Greg Brown, senior public astronomy officer at the Royal Observatory Greenwich, told MailOnline: 'As of today, there are no known asteroids that are both large enough to be of concern and have a sizeable chance to impact the Earth.'
If any asteroids do hit Earth it is likely that they will fall over the ocean or over the remote regions which still make up the majority of the planet's surface.
This renders the risk of any serious devastation from a meteoric impact extremely low.
However, that does not mean that the Earth is completely safe.
While the risk of a collision remains extremely low, scientists warn that some sort of dangerous encounter is inevitable in the very long run. This is why space agencies are investing in planetary defence systems (artist's impression)
While big impacts are very rare, Dr Brown points out that 'asteroid impacts are a case of when, not if.'
That is why space agencies around the world are investing huge funds into planetary defence projects.
These include ESA's DART mission which managed to knock an asteroid off course with kamikaze satellite in 2022.
Dr Brown adds: 'It is important that we continue to improve our ability to track these objects and work on measures to protect ourselves if they occur.'
Boeing’s ruimtefiasco: astronauten achtergelaten in de ruimte door technische problemen
Boeing’s ruimtefiasco: astronauten achtergelaten in de ruimte door technische problemen
Boeing’s ruimtefiasco: astronauten achtergelaten in de ruimte door technische problemen
Key takeaways
De eerste astronautenmissie van Boeing eindigde met twee astronauten die in een baan om de aarde achterbleven.
Een slecht functionerende capsule, Starliner, keerde leeg terug naar de aarde na een tumultueuze reis geplaagd door stuwraketten en heliumlekken.
De astronauten zullen hun verblijf in de ruimte nu meer dan acht maanden moeten verduren door vertragingen bij het boeken van een nieuwe vlucht met SpaceX.
De ambitieuze zoektocht van Boeing om een geloofwaardige speler te worden in de ruimtevaartindustrie kreeg een tegenslag toen de eerste astronautenmissie eindigde met twee achtergebleven astronauten in een baan om de aarde. De slecht functionerende capsule, Starliner, keerde leeg terug naar de aarde na een tumultueuze reis die werd geplaagd door defecte stuwraketten en lekken van het vitale gas helium.
Suni Williams en Butch Wilmore.
Beeld AFP
Technische problemen teisteren de missie
De missie begon veelbelovend, maar ontrafelde al snel onder het gewicht van de technische uitdagingen. Ondanks uitgebreide tests achtte Boeing de capsule veilig voor de terugreis, terwijl NASA een andere mening was toegedaan.
Uiteindelijk koos NASA voor een veiligere optie en boekte een vlucht met SpaceX, die hen pas in februari zal terugbrengen. Deze vertraging betekent dat de astronauten hun verblijf in de ruimte meer dan acht maanden zullen moeten verduren, meer dan twee keer de oorspronkelijke tijdspanne.
De terugreis wordt een beproeving
Het oorspronkelijke plan was dat de astronauten slechts een week na de lancering in de Starliner zouden terugkeren naar de aarde. Hun reis werd echter ontsierd door een cascade van problemen met de stuwraketten en heliumlekken. De ernst van deze problemen zette NASA ertoe aan om de risico’s te heroverwegen die gepaard gingen met het thuisbrengen van de astronauten in de onrustige capsule.
Astronauten gestrand in een baan om de aarde
Door de situatie zijn de twee astronauten gestrand in een baan om de aarde, in afwachting van een lift naar aarde. Hun lot hangt ervan af terwijl ingenieurs blijven worstelen met de mysteries van de slecht functionerende Starliner.
Boeing Starliner: Two astronauts wait to come home amid spacecraft issues
In 1957, the astrophysicist Herman Bondi wrotea paperin which he considered the possible existence ofa negative mass in Albert Einstein’s theory of gravity. A negative mass would repel a positive mass away from it. Given that, a pair of positive and negative masses could accelerate together up to the speed of light. The negative mass would push away the positive mass which in turn would pull the negative mass for the ride. The runaway pair would accelerate indefinitely, without any need for fuel or a propulsion system. Energy conservation would not be violated because the sum of the two masses is zero.
However, in a recent discussion I had with my brilliant collaborator, Mark Hertzberg, we agreed that the existence of a negative mass in nature would allow for a time machine in which one can visit the past. The reason is simple. A positive mass delays the arrival of light that passes near it, as recognized in a seminal paper by my distinguished colleague, Irwin Shapiro.
The “Shapiro time delay” near a positive mass reverses sign and turns into a “Shapiro time advance” near a negative mass. If the sender is moving sufficiently close to the speed of light, the Shapiro time advance would mean that a light signal can be reflected off a mirror and arrive back to the sender when the sender’s clock shows a time earlier than the original transmission time of the same signal.
Effectively, the Shapiro time advance is equivalent to communicating with a faster-than-light particle which violates causality. Within Einstein’s gravity, the technical term for a time machine of this type is a “closed timelike curve.”
Within the standard framework of Einstein’s gravity, a negative mass would allow children to prevent their parents from giving birth to them, a logical inconsistency. Time machines can also be created by traversable wormholes which,as Stephen Hawking recognized in a seminal paper about “chronology protection” from 1992, require negative energy as well.
“It has been suggested that an advanced civilization might have the technology to warp spacetime so that closed timelike curves would appear, allowing travel into the past,” the abstract of Hawking’s paper begins, and thereafter concludes by saying, “These results strongly support the chronology protection conjecture: The laws of physics do not allow the appearance of closed timelike curves.” Hawking’s conclusion was supported ina subsequent paper by Bernard Kay, Marek Radzikowski and Bob Wald, but the final verdict on its validity is awaiting a better understanding of quantum gravity.
If time machines are absent, what are the most extreme distortions of spacetime that our Universe is known to display?
InEinstein’s gravity, the Earth orbits the Sun because the Sun curves space. An analogy is offered by the surface of a trampoline which is curved by a bowling ball,causing a marble with the proper speed to move in a circle around the heavier ball. Removing the bowling ball would release the marble on a straight trajectory on the flat trampoline. Similarly, discarding the Sun would free Earth on a straight path toward interstellar space.
The spacetime curvature created by the Sun at our location is characterized by a length scale that is equal to the inverse of the square root of (GM/r^3c^2), where G is Newton’s constant, M is the mass of the Sun, r is the Earth-Sun separation, and c is the speed of light. Plugging in the relevant numbers yields a curvature length of 10,000 times the Earth-Sun separation. Another way to derive this number is by recognizing that the Earth’s speed around the Sun is 10,000 smaller than the speed of light, c.
Other astrophysical objects display a stronger spacetime curvature overa shorter length scale. The largest distortions of spacetime are expected near a black hole. Limiting our attention to the accessible region outside the event horizon, this curvature length scales in proportion to the black hole mass. The most massive black holes in the Universe have a mass of ten billion solar masses and a curvature scale of 1,000 times the Earth-Sun separation. Thecurvature length shrinksby billions of times for black holes or neutron stars formed from the collapse of massive stars.
What is the largest spacetime curvature that we observed so far in the Universe? It corresponds to a length scale of about 24 kilometers, the size of a large city on Earth, and is realized on the surface of neutron stars which carry about twice the mass of the Sun atnuclear density.
The same spacetime curvature characterizes an atomic nucleus because it has the same matter density as a neutron star. But a curvature length of 24 kilometers is 19 orders of magnitude larger than the size of an atomic nucleus and therefore has no significance when nuclei are smashed into each other in CERN’s Large Hadron Collider.
In conclusion, based on all we know from observations or theorywithin the standard model of physics, negative masses are forbidden for the same reason that time machines are not allowed. If aliens were able to create negative masses and use them for travel, then they would have also been able to travel back in time.
If time travel had been feasible, then future generations of quantum-gravity physicists could have been able to visit Earth and rewrite our history as they wish. For example, they could have killed Adolf Hitler and allowed six million Jews to thrive in Europe between 1939 and 1945. The fact that this never happened suggests that either time machines will never be constructed in our future or that their creators have no interest in saving human lives.
AviLoebis the head of the Galileo Project, founding director of Harvard University’s –Black Hole Initiative, director of the Institute for Theoryand Computation at the Harvard-SmithsonianCenter for Astrophysics,andthe former chair of the astronomydepartmentat Harvard University (2011-2020). He is a former memberof thePresident’s CouncilofAdvisorsonScience andTechnologyand a former chair oftheBoard on Physics and Astronomy of the NationalAcademies.He is the bestselling author of “Extraterrestrial:TheFirstSignofIntelligentLifeBeyondEarth” and a co-author of the textbook “Life in the Cosmos”, both published in 2021. His new book, titled “Interstellar”,was published inAugust 2023.
Planets with magma oceans like this one, GJ 1214b, could have most of their water beneath the surface, deep in their interiors. Image: NASA/JPL-Caltech/R. Hurt
When you walk across your lawn or down the street, you move on the surface of a surprisingly layered world. Some of those layers are rock, others are molten. A surprising amount of water is mixed into those layers, as well. It turns out that most planets have more of it “deep down” than we imagined.
Most of a planet’s water isn’t on the surface, even though we see oceans, lakes, and rivers here on Earth. The heart of our planet is iron, and covered by silicate rock layers. Scientists have long used our planet’s makeup as a sort of “model” for rocky exoplanets around other stars. That model may be outdated and too simplistic, according to Professor Caroline Dorn at ETH Zurich. “It is only in recent years that we have begun to realize that planets are more complex than we had thought,” she said. Dorn has been collaborating with Haiyang Luo and Jie Deng from Princeton University to understand the distribution of water mixed with silicates and iron inside a planet. They used computer simulations to come up with a robust model of the distribution of water on exoplanets.
Recent investigations of Earth’s water content triggered the team’s work. It turned out that our oceans contain only a small fraction of the overall water budget. The interior could be hiding the equivalent of 80% of the surface oceans. That raised a big question: could other planets have similarly hidden reservoirs?
Planets and Water
To answer that question, the science team simulated how water behaves in the conditions present when planets are young. Many known exoplanets orbit close to their stars, which means they’re likely to be hot worlds. They probably have oceans of molten magma that haven’t yet solidified to make silicate bedrock mantles.
Artist’s impression of a lava world. The exoplanet K2-141b is so close to its host star that it likely has magma oceans and surface temperatures over 3000 degrees. Water may be mixed in with the magma. c. ESO
As it turns out water dissolves very well in these magma oceans. The iron core takes time to develop,” she said. “A large share of the iron is initially contained in the hot magma soup in the form of droplets,” she explained, noting that water sequestered in this soup combines with the iron droplets and sinks with them to the core. “The iron droplets behave like a lift that is conveyed downwards by the water,” Dorn said.
That kind of mixing of iron and water happened in the moderate pressure environment in Earth’s interior. Larger planets with higher interior pressures presented a challenge to understand. It turns out they mix water and iron, too. “The larger the planet and the greater its mass, the more the water tends to go with the iron droplets and become integrated in the core,” said Dorn. “Under certain circumstances, iron can absorb up to 70 times more water than silicates. However, owing to the enormous pressure at the core, the water no longer takes the form of H2O molecules but is present in hydrogen and oxygen.”
Evolving Planets over Time
This result is a big deal if you want to understand how planets form and develop. That’s because the water never escapes the planet’s core. However, under the right conditions, water mixed in with the magma ocean can “de-gas” under the right conditions. Essentially, it separates and rises to the surface as the magma cools and forms the mantle. “So if we find water in a planet’s atmosphere, there is probably a great deal more in its interior,” explained Dorn.
That gives a lot of new information to use as scientists search for planets around other stars and look for habitable worlds. In particular, astronomers using the JWST can track the types of molecules in exoplanet atmospheres and use that information to find habitable worlds. “Only the composition of the upper atmosphere of exoplanets can be measured directly,” said Dorn. “Our group wishes to make the connection from the atmosphere to the inner depths of celestial bodies.”
TOI-270d appears to be a super-Earth or Earth-type planet, as shown in this artists’ concept. Could it have water hidden in its core that could boost its habitability. Courtesy Martin Vargic CC BY 3.0
Currently, the team studies exoplanet TOI-270d. “Evidence has been collected there of the actual existence of such interactions between the magma ocean in its interior and the atmosphere,” said Dorn. It’s at the top of her list of interesting objects to examine more closely for water, along with another one called K2-18b. It seems to be a promising candidate for habitability as well.
So, Does Deep Water Imply Life or Habitability?
Since water is important in the search for life-bearing worlds, looking for wet Earth-type and super-Earth worlds is the next step in searching out life. Dorn’s team found that planets with these deep water layers are likely to be fairly rare. That’s because most of their water is not on the surface. In other words, they may not be ocean worlds, but places with water trapped in their cores.
That’s not all bad. The science team assumes that even planets with a relatively high water content could have the potential to develop Earth-like habitable conditions. Dorn’s team may give scientists new ways to look for water-abundant worlds.
Could Comets have Delivered the Building Blocks of Life to “Ocean Worlds” like Europa, Enceladus, and Titan too?
Throughout Earth’s history, the planet’s surface has been regularly impacted by comets, meteors, and the occasional large asteroid. While these events were often destructive, sometimes to the point of triggering a mass extinction, they may have also played an important role in the emergence of life on Earth. This is especially true of the Hadean Era (ca. 4.1 to 3.8 billion years ago) and the Late Heavy Bombardment, when Earth and other planets in the inner Solar System were impacted by a disproportionately high number of asteroids and comets.
These impactors are thought to have been how water was delivered to the inner Solar System and possibly the building blocks of life. But what of the many icy bodies in the outer Solar System, the natural satellites that orbit gas giants and have liquid water oceans in their interiors (i.e., Europa, Enceladus, Titan, and others)? According to a recent study led by researchers from Johns Hopkins University, impact events on these “Ocean Worlds” could have significantly contributed to surface and subsurface chemistry that could have led to the emergence of life.
Voyager 1 image of Valhalla, a multi-ring impact structure 3,800 km (2,360 mi) in diameter. Credit: NASA/JPL
Exogenesis
As indicated in their paper, impacts from asteroids, comets, and large meteors are more often associated with destruction and extinction-level events. However, multiple lines of evidence indicate that these same types of impacts may have supported the emergence of life on Earth roughly 4 billion years ago. These events not only delivered volatiles (such as water, ammonia, and methane) and organic molecules, but modern research indicates that they also created new substrates and compounds essential to life.
Moreover, they created a variety of environments that were essential to the emergence and sustainment of life on Earth. As they wrote:
“Exogenously delivered materials have been estimated to be an important source of organics on early Earth. Shockwaves could provide the energy for organic synthesis of important precursors like HCN or amino acids. The iron and heat from very large impactors can facilitate the reducing atmospheric conditions necessary for abundant HCN production. Impacts fracture and, in typical terrestrial events, melt the target: the more permeable substrates and excavation of deeper rock layers promote hydrothermal activity and endolithic habitats.”
According to the latest fossilized evidence, the earliest life forms emerged on Earth roughly 4.28 billion years ago. These fossils were recovered from hydrothermal vent precipitates in the Nuvvuagittuq Greenstone Belt in northern Quebec, Canada, confirming that hydrothermal activity played a vital role in the emergence of life on Earth. But what about the many “Ocean Worlds” that reside in the outer Solar System? This includes bodies like Europa, Ganymede, Enceladus, and Titan, as well as Uranus’ moons Ariel and Titania, Neptune’s moon Triton, and Trans-Neptunian bodies like Pluto, Charon, and possibly more.
Ocean Worlds
This term refers to bodies predominantly composed of volatile elements such as water and differentiated between an icy crust and a rocky and metallic core. At the core-mantle boundary, tidal flexing (the result of gravitational interaction with another body) causes a buildup of heat and energy released via hydrothermal vents into the ice. This allows these worlds to maintain oceans of liquid water in their interiors. In short, these worlds have all the necessary ingredients for life: water, the requisite chemical compounds, and energy.
Impact velocity and first contact pressure estimates for potential icy and rocky impactors on “Ocean Worlds.” Credit: Mackenzie, S.M. et al. (2024)
Furthermore, data from the NASA/ESA Cassini–Huygens mission confirmed that the plumes regularly erupting from Enceladus’ southern polar region contain organic molecules. Last but not least, the presence of surface craters indicates that these bodies have experienced surface impacts throughout their history. The question naturally arises: could impacts have delivered the necessary building blocks of life to “Ocean Worlds” the same way they delivered them to the inner Solar System? And if so, what does that mean about their potential habitability today? As the team wrote in their paper:
“Impact processes are likely an important part of the answers to these questions, as impacts can drive exchange through the ice crust—either through direct seeding or flushing through the crust—and therefore drive episodic influxes of organic and inorganic materials from the surface and/or from the impactor itself. Impacts can also generate ephemeral microcosms: any liquid water melted during impact freezes out over timescales commensurate with the impact energy.”
“The exciting potential for chemistry within these pockets has been established, from concentrating salts to driving amino acid synthesis. Furthermore, shock-driven chemistry of icy, sometimes organic-rich (in the case of Titan especially) target materials may generate new “seed” compounds (e.g., amino acids or nucleotides) in the melt pool.”
Investigation
The first step for MacKenzie and her team was to investigate the initial shock levels created by the most common impacts for Ocean Worlds—comets that likely originated from the Kuiper Belt and Oort Cloud. To do this, the team calculated the velocities and maximum pressure that would be achieved by impacts involving icy and rocky bodies. They also considered how this would vary based on different families (primary or secondary impacts) and which systems were involved – i.e., Jupiter or Saturn. Whereas primary impacts involve comets or asteroids, secondary impacts are caused by the ejecta they create.
In the case of the Jupiter and Saturn systems, secondary impactors may be icy or rocky depending on where they originated (an icy body like Europa, Enceladus, and Titan, a rocky body like Io and larger asteroids). Whereas primary impacts have higher velocities and produce larger melt volumes), secondary impacts are more frequent. To determine melt sizes, the team consulted observed crater sizes on Europa, Enceladus, and Titan, and dynamic models that calculate the cumulative rate of cratering over time. They then compared the peak pressures at impact to thresholds for the survivability of elements essential to life, organic molecules, amino acids, and even microbes identified in previous studies.
From this, they determined that most impacts at Europa and Enceladus experience peak pressures greater than what bacterial spores can survive. However, they also determined that a significant amount of material still survives these impacts and that higher first-contact pressures could also facilitate the synthesis of organic compounds in the meltwater that fills the craters. Meanwhile, on average, Titan and Enceladus experienced impacts with lower impact velocities, creating peak pressures that fall within the tolerance range for both bacterial spores and amino acids.
The next step was to consider how long fresh craters would survive and whether this would be sufficient for synthesizing biological materials. Based on the observed crater sizes on Enceladus and Europa, they determined that the longest-lived craters last only a few hundred years, whereas Titan could take centuries to tens of thousands of years for fresh craters to freeze. While Europa and Enceladus experience more high-velocity impacts (due to Titan’s dense atmosphere), the long-lived nature of Titan’s craters means that all three bodies have a chance for organic chemistry experiments to occur.
They also considered resurfacing rates on Europa, Enceladus, and Titan and how these would cycle biological material to their interiors. In all three cases, the satellites have relatively “young” terrain, implying regular resurfacing events.
Results
Based on these considerations, Mackenzie and her team determined that melts produced by comet impacts on Europa, Enceladus, and Titan have been frequent and long-lived enough to be of astrobiological interest. However, this varies based on the composition of the comets and the surface ice in question. As they summarized:
“At Europa and Enceladus, the survival and deposition of impactor organics is more important as there are fewer surface organics within the ice crust to seed the melt pool. On Titan, the survival of elements like phosphorous may be more important. Thus, even the small, more frequent impact events contribute to the astrobiological potential by delivering less modified compounds to the surface that are available either for immediate reaction if melt is produced or for future processing (including in subsequent impact events).”
Total melt production for observed craters on Enceladus (cyan) and Titan (orange), binned by observed crater diameter. Credit: Mackenzie, S.M. et al. (2024)
For instance, they found that a comet impacting Europa at the average impact velocity would create a 15 km (9.3 mi) crater and provide ~1 km3 (0.24 mi3)of meltwater. Based on the abundance of glycine (an essential amino acid) found on the comet 67P Churyumov–Gerasimenko, they determined that several parts per million would survive – roughly three orders of magnitude higher than what has been observed forming around hydrothermal vents here on Earth. “Thus, impactors seed whatever chemistry happens in the melt, providing organic and other essential elements depending on the impactor composition,” they added.
While this does not necessarily mean that these and other “Ocean Worlds” are currently habitable or actively support life, they demonstrate potential for future study. In the coming years, missions like the ESA’sJUpiter ICy moons Explorer (JUICE), and NASA’s Europa Clipper and Dragonflymissions will reach Ganymede, Europa, and Titan (respectively). There are also plans to create an Enceladus Orbiter to pick up where the Cassini-Huygens probe left off by examining Enceladus’ plume activity more closely.
Therefore, conducting in-situ sampling and analysis on these moons could provide powerful insight into prebiotic chemical pathways and determine under what conditions life can emerge. These sample studies will also address the larger question of whether or not life could exist in the interiors of “Ocean Worlds,” providing a preview of what future missions prepared to explore beneath the ice will find.
Study: There Were Volcanic Eruptions on Moon as Recently as 123 Million Years Ago
Study: There Were Volcanic Eruptions on Moon as Recently as 123 Million Years Ago
There is extensive geologic evidence of ancient volcanic activity on the Moon, but it is unclear how long that volcanism persisted. Magma fountains produce volcanic glasses, which have previously been found in samples of the Moon’s surface. Dr. Qiuli Li and colleagues from the Institute of Geology and Geophysics at the Chinese Academy of Sciences have analyzed around 3,000 glass beads from lunar soil samples collected by China’s Chang’e-5 mission. They’ve identified three glass beads as having a volcanic origin on the basis of their textures, chemical compositions, and sulfur isotopes. Uranium-lead dating of these volcanic beads shows that they formed approximately 123 million years ago.
Volcanic eruption producing glass beads on the Moon.
Image credit: T. Zhang & Y. Wang.
Samples collected by the Apollo, Luna and Chang’e‑5 missions have previously shown there was widespread basaltic volcanism on the Moon extending from about 4.4 to 2 billion years ago.
The findings of the current study demonstrate that volcanism persisted much longer than was previously suspected, at least on smaller, more localized scale
“Dating of lunar volcanic basalt samples returned to Earth by the Apollo and Luna missions or delivered to Earth as lunar meteorites has shown that lunar basaltic volcanism continued until at least 2.9-2.8 billion years ago,” the researchers said.
“However, analysis of lunar samples returned by the Chang’e-5 mission has demonstrated that basaltic volcanism persisted until at least 2 billion years ago.”
“Remote sensing observations have indicated potentially even younger volcanism during the late Copernican era (less than 800 million years ago) on the Moon.”
“However, none of these remote observations provide a precise date for the potential volcanism.”
“In addition, the proposed extrusions of late-Copernican mare basalt cover only restricted areas, no samples of which are available.”
“Eruptions of gas-rich magma can generate magma fountains, which produce submillimeter glass beads.”
“Such beads could potentially be deposited over wide areas and subsequently be transported further across the lunar surface by impact.”
“The volcanic glasses could be a trace component in existing samples.”
In their study, Dr. Li and co-authors sorted through 3,000 tiny glass beads they recovered from a lunar sample collected by Chang’e‑5, examining the bead’s chemical compositions, physical textures and sulfur isotopes to distinguish potential volcanic glasses from glasses produced by meteorite impacts.
They identified three beads as being of volcanic origin, then used radiometric dating to determine the beads formed 123 million years ago.
The volcanic beads contain high abundances of potassium, phosphorus and rare-earth elements, known as KREEP elements, which can produce radioactive heating.
Localized heating due to KREEP elements might melt rocks in the Moon’s mantle, leading to small amounts of magma erupting to the surface.
“We measured high abundances of rare earth elements and thorium in the volcanic glass beads, which could indicate that such recent volcanism was related to local enrichment of heat-generating elements in the mantle sources of the magma,” the researchers said.
Bi-Wen Wang et al. 2024. Returned samples indicate volcanism on the Moon 120 million years ago. Science 385 (6713); doi: 1077-1080; doi: 10.1126/science.adk6635
Ruimtecapsule Starliner succesvol, maar zonder 2 Amerikaanse astronauten, geland op aarde
Ruimtecapsule Starliner succesvol, maar zonder 2 Amerikaanse astronauten, geland op aarde
Artikel door Ellen Maerevoet, Belga
Ruimtecapsule Starliner succesvol geland op aarde
De Boeing-ruimtecapsule Starliner is zaterdag geland op aarde. Dat blijkt uit beelden die NASA heeft vrijgegeven. De capsule landde zonder de astronauten die het naar het internationale ruimtestation ISS heeft gebracht, nadat NASA had besloten dat het risico te groot was.
De Starliner landde zaterdag zachtjes op de White Sands ruimtebasis in New Mexico rond 06.01 uur. De landing werd vertraagd door parachutes en airbags.
De capsule had ongeveer zes uur eerder het ISS verlaten, zonder de twee astronauten die op de heenvlucht naar het ISS meereisden. Astronauten Sunita Williams en Butch Wilmore zijn al sinds 6 juni aan boord van het ISS. Ze voerden een testmissie uit die ongeveer een week had moeten duren. Maar door problemen met de Starliner konden ze niet terugkeren. Er werd gevreesd dat het toestel niet over de nodige stuwkracht zou beschikken om de baan rond de aarde te verlaten.
De Starliner werd 3 maanden geleden voor het eerst met 2 Amerikaanse astronauten aan boord gelanceerd: Sunita Williams (58) en Butch Wilmore (61). Tijdens hun vlucht naar het Internationaal ruimtestation ISS waren er al technische problemen.
Williams en Wilmore kwamen op 6 juni aan in het internationaal ruimtestation ISS. Het was de bedoeling dat ze er 8 dagen zouden blijven, maar een resem technische defecten besliste daar dus anders over. Zo was er een probleem met de stuwmotoren, maar er werden ook 3 heliumlekken ontdekt.
Door die problemen moest de automatische piloot tijdens de heenvlucht uitgeschakeld worden, en moesten de astronauten de capsule handmatig koppelen aan het ISS. Nadat een eerste poging mislukte, slaagden ze daar bij een tweede poging toch in.
Vrees voor gebrek aan stuwkracht onterecht
Omdat de technische problemen nog altijd niet helemaal opgelost zijn, is de Starliner nu dus onbemand teruggekeerd naar de aarde. Er werd gevreesd dat het toestel niet over de nodige stuwkracht zou beschikken om de baan rond de aarde te verlaten.
Ruimtecapsule Starliner succesvol geland op aarde
De Starliner landde vanochtend rond 6.01 uur (onze tijd) zachtjes op de White Sands-ruimtebasis in New Mexico. De landing werd vertraagd door parachutes en airbags.
De capsule had ongeveer 6 uur eerder het ISS verlaten, zonder de 2 astronauten dus die op de heenvlucht naar het ISS meereisden.
Een vlotte terugvlucht was belangrijk voor fabrikant Boeing, niet alleen voor het vertrouwen, maar ook voor toekomstige kansen om nieuwe goedkeuringen voor bemande vluchten te krijgen.
Volgens NASA gaat het momenteel goed met het duo en hebben ze regelmatig contact met hun familie.
NASA heeft nu beslist om de twee astronauten met een ruimtevaartuig van SpaceX weer naar huis te brengen. De Crew 9-missie van SpaceX zal daarom later in september met slechts twee van de vier voorziene astronauten naar het ISS vertrekken. Bij de terugkeer naar aarde in februari volgend jaar, zullen Wilmore en Williams de twee vrijgekomen plaatsen innemen.
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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 75 jaar jong.
Mijn hobby's zijn: Ufologie en andere esoterische onderwerpen.
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