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.
05-10-2025
This Scientist Claims Apollo Mission Brought Back “Metals” from Moon Made by Advanced Machines and Structures on Mars and Moon Possibly 50,000 Years Old from Our Past
This Scientist Claims Apollo Mission Brought Back “Metals” from Moon Made by Advanced Machines and Structures on Mars and Moon Possibly 50,000 Years Old from Our Past
This Scientist claims the Apollo mission brought back “Metals” from the Moon that are not natural, made by advanced machines and structures on Mars and the Moon are possibly 50,000 years old — from us, from a time in our past.
Gregg Braden is a five-time New York Times best-selling author & scientist. On the Joe Rogan Podcast, he discussed strange things in space, focusing on the “Face on Mars” and other geometric structures found in NASA’s images.
Braden recounts how Richard Hoagland’s talk about these structures influenced his career. Early grainy images of Mars showed what looked like a face, which was fascinating.
Later images seemed less convincing, but Braden points out that the geometric base, especially things like squares and right angles, are unlikely to be formed by natural erosion. He explains that nature rarely makes 90-degree angles, so their presence suggests intentional construction.
They discuss how NASA was forced to release lunar images due to the Freedom of Information laws. However, many of these images were pixelated and blurred, which Braden believes made the mysterious structures even more obvious. He claims some structures on the moon and Mars have shapes like pyramids with three, four, or five sides.
Braden describes the Viking probes that landed on Mars in the 1970s. These spacecraft were looking for small signs of life, like microbes, near gigantic geometric monuments.
He says some scientists estimate these monuments are around 50,000 years old. Joe asks how this dating was done, and Braden replies that it’s mostly relative dating with geological strata, but he hesitates and admits the details are complicated.
Braden says only the USA and the Soviet Union previously had the resources to go to the moon, but now India and China are sending probes. He’s especially interested in China’s promise to televise live what they find, which could show architectural structures and inscriptions.
Braden believes these inscriptions will be in languages we recognize, which would be significant evidence. In the podcast, he specifically states that the evidence suggests the structures on Mars and the Moon are from us, meaning a past human civilization, not extraterrestrials. He argues that these are remnants of a previous advanced cycle of humanity, where people worked together and then destroyed each other through war, and that we’re repeating these cycles today.
Former NASA astronaut Al Worden once said on the British TV show Good Morning Britain, “We are the aliens… who came from somewhere else… if you don’t believe me, go read about the Ancient Sumerians.” He passed away in 2020.
Al Worden was the Apollo 15 command module pilot who flew to the Moon in July 1971. He is remembered as “the most isolated man” in history since, at times, his fellow astronauts were more than 3,600 kilometers (2,235 miles) away from him on the lunar surface.
Al Worden believed that we are not alone in the universe. He said there is no doubt that other forms of life exist out there.
During his visit to radio host Ray D’Arcy’s show in 2014, Worden spoke about spending three days alone in space during his 1971 mission. The experience gave him time to think deeply about life and the universe.
He said, “You see the universe out there and all the stars, and you think and research about those stars. Then you realize how many are out there. In our Milky Way Galaxy alone, there are 400 billion stars, and there are another 200 billion galaxies beyond it. You start to think, ‘Out there, there’s got to be someone.’” When asked why we have not yet been contacted by aliens, he joked, “Why would they want to? They already know enough about us not to.” He added that humans are making a mess of things on Earth.
Later, during another interview on Good Morning Britain, he explained his new thoughts on alien life. He said very clearly that humans themselves are the ancient aliens who came to Earth long ago.
When asked again if extraterrestrials exist somewhere out there, Worden replied, “I’ve been asked that question hundreds of times — ‘Do you believe in aliens?’ — and my answer is yes.”
In 2017, he returned to the same topic during another British TV interview. When asked why humans spend huge amounts of money on space missions while there are so many problems on Earth, his response surprised the host and the viewers. He said aliens are real and that they had come to Earth in ancient times, creating our civilization. He added that anyone could find proof of this by reading the writings of the ancient Sumerians.
Worden believed deeply in ancient Sumerian texts. Those ancient writings told stories of humans and gods living together, with humans serving the gods. Each Sumerian city was said to have its own protective deity.
The earliest known record of a Sumerian creation story was found on a tablet discovered in 1893 in the city of Nippur, an ancient Sumerian site in Mesopotamia.
According to those cuneiform tablets, Earth was first ruled by gods who looked like humans. When they arrived, they made Earth suitable for life by farming, digging, and mining its minerals. The texts even mention a rebellion between the gods and their workers. One translated line reads that when the gods worked like men, they suffered under the heavy labor and great distress.
It is said that before humans were created, a group of deities known as the Anunnaki had used younger gods called the Igigi as workers. These Igigi were forced to dig for gold and perform other hard tasks on Earth. When they eventually rebelled, humans were created to take their place.
For people in ancient Mesopotamia, heaven was described as having three layers. The lowest layer was the home of the stars, the middle layer was where the younger gods, the Igigi, lived, and the highest layer belonged to An, the sky god.
Other researchers have also made surprising claims connected to these ideas. Dr. Ken Johnston, a former aerospace engineer, said that NASA already knows astronauts discovered ancient alien structures and remains of advanced machinery on the Moon. He claimed some of these technologies had the power to control gravity.
Dr. Ralph Kennedy Johnston Sr., often known as Ken Johnston, was born in 1942 at Fort Sam Houston, Texas. He worked as one of four Civilian Astronaut Consultant Pilots at NASA and helped train Neil Armstrong, Buzz Aldrin, and Michael Collins for the Apollo 11 mission to the Moon.
Johnston is also a retired U.S. Marine and has become known as a “NASA whistleblower,” though he rejects the name. He said he only wanted to share information that the public deserved to know.
In addition, some people connect his claims with stories told by Ingo Swann, a well-known remote viewer, who said he psychically saw strange structures on the Moon. Swann described domes, tall towers, cross-shaped buildings, long tunnels, and signs of mining activity. He thought that either someone or something had secretly built these bases on the Moon.
Swann also said he saw human-like figures on the Moon digging into a cliff. The strange part, he added, was that they all appeared completely naked.
During this remote-viewing experiment, a man named Axelrod supervised Swann. Suddenly, Axelrod stopped the session and seemed alarmed, explaining that the beings on the Moon might have become aware they were being watched, which could be dangerous.
After that, Axelrod asked Swann if he knew a man named George Leonard. Swann said no. Around that same time, Leonard was writing a book titled Somebody Else Is on the Moon.
That book, published in 1977, described reports of mysterious, unnatural structures on the Moon — the very kind of things Axelrod seemed to worry about. Leonard’s work suggested that these lunar structures could not have been formed naturally and looked as though someone had built them.
Over time, Swann and Axelrod met secretly to discuss more of these strange observations. These secret meetings, which Swann later compared to scenes from a spy movie, suddenly ended in 1977 without explanation. Swann was left confused about the truth.
He wondered if his psychic vision had detected an extraterrestrial base built long ago. Yet because the people he saw looked completely human, he also considered the idea that it could have been a hidden Earth-based project. He thought maybe Axelrod wanted him to discover something without revealing the government’s involvement.
Despite decades passing, the mystery is still unresolved. The strange lunar structures described by Leonard, Swann, and Johnston continue to raise questions about whether the Moon hides evidence of advanced civilizations.
The idea that aliens might be secretly using the Moon reminds many of similar theories claiming aliens could be operating on Earth itself. Some people think those “ancient visitors” who might have built advanced cities or shared secret technology could have played a role in shaping human evolution and culture.
Al Worden’s comments about humans being the real aliens connect strangely well with these later stories. If humans came from somewhere else long ago, as he suggested, it might explain why ancient cultures around the world have myths about gods descending from the sky, teaching knowledge, and building great cities before disappearing.
Worden, unlike most astronauts, remained open to such possibilities until his last years. He said exploring space was not just about science but also about finding the truth of where we came from. Many found his words mysterious, but others thought he raised an interesting point — that our search for life beyond Earth might end with us discovering our own distant origin among the stars.
Mars Express images were used to create this film showing the Xanthe Terra region. Credit: ESA/DLR/FU Berlin & NASA/JPL-Caltech/MSSS
For more than twenty years, the Mars Expressorbiter has studied the Red Planet and remains the European Space Agency's (ESA) only operational mission. In that time, it has provided the most complete map of the Martian atmosphere and its chemical composition. It has also studied Mars' innermost moon (Phobos) in stunning detail, and traced the flow channels, delta fans, and chaos terrain that demonstrate that liquid water once flowed on the planet's surface. In addition, the images taken by the orbiter have been used to create detailed mosaics that have breathtaking 3D views of the landscape.
In a recently released film, the ESA's Mars Express takes viewers on a flight over Xanthe Terra, a highland region just north of the equator. The film is a mosaic created from images taken during single-orbit observations by the Mars Express' High Resolution Stereo Camera (HRSC). The images were combined with topography information from a digital terrain model (DTM) to create a three-dimensional view of the Martian landscape. The main feature in this video is Shalbatan Vallis, a 1300 km-long (~800 mi) outflow channel that transitions from the Southern Highlands to the Northern Lowlands.
This channel is one of many that crisscross Xanthe Terra and adjacent regions, such as Lunae Planum, Margaritifer Terra, and others, which are part of the larger Oxia Palus quadrangle. Based on data obtained by dozens of missions going back to the Pioneer probes and the Viking missions, scientists believe that Shalbatan Vallis and similar channels in the region fed water from the Southern Highlands into a planet-wide ocean in the Northern Lowlands. Many of these features are connected to Valles Marineris, the largest canyon system in the Solar System that is also believed to have once contained water.
The tour culminates in a spectacular view of the 100 km-wide (62 mi) Da Vinci crater, which contains a smaller crater and debris field caused by a more recent collision. Check out the full video below or watch the broadcast-quality footage here.
A scientist has claimed that astronauts may soon uncover the remains of a long-lost human civilization that once lived on the Moon 50,000 years ago.
Author and geologist Gregg Braden told podcast host Joe Rogan that evidence of this ancient city was kept from the public by the US and Russia during the Cold War.
However, during the interview on Wednesday, Braden noted that emerging superpowers China and India plan to televise their findings once upcoming expeditions reach the lunar surface.
The two nations are planning to broadcast their lunar missions using live feeds from mission control and cameras on their robotic landers and rovers, streaming on national TV, social media, and official space agency apps.
China's robotic Chang'e 7 mission is set for 2026, while India's Chandrayaan-4 drone is now likely to launch in 2028, with manned missions for both set between 2030 and 2040.
According to the scientist, who has written about the possibility of life on the moon and Mars, astronauts will discover archeological structures covered in languages that people will be able to recognize as being written by human cultures.
'The evidence suggests they're from us, from a time in our past, a cycle of civilization where we did great and beautiful things by working together until we destroyed one another through war, and that we're repeating that cycle,' Braden claimed.
Braden has previously stated in books like Deep Truth and Gaia TV’s Missing Links that humans on the moon came from a long-lost Earth civilization 50,000 years ago, which developed space-faring technology before destroying itself in war.
Author and geologist Gregg Braden has claimed that there are ancient structures on both the moon and Mars which prove lost human civilizations traveled through space
NASA has not conducted a manned moon mission since 1972. Braden said the next ones conducted by other nations could televise their findings in real time
Current scientific data, including NASA's Lunar Sample Compendium and high-resolution images taken of the moon, show no evidence of artificial structures or inscriptions on the moon.
Braden claimed that photographs from NASA's Clementine mission revealed structures on the moon with 90-degree angles, which he argued don't exist in nature and suggest they were built by an ancient civilization millennia ago.
He linked these lunar structures to similar geometric shapes in Mars' Cydonia region, like the famous 'Face on Mars' and several pyramid-shaped forms, which he believes date back 50,000 years ago based on the relative dating of rock layers by scientists.
NASA has dismissed claims that there are structures on Mars, calling strange building-like images 'natural formations.'
As for what proof he had of this world-changing theory, Braden cited unconfirmed stories from Apollo astronauts who allegedly saw structures and writings while visiting the moon, suggesting a cover-up by NASA and Russia 50 years ago.
Apollo 11 astronauts Neil Armstrong and Buzz Aldrin allegedly witnessed a large UFO or metallic structure on the Moon's far side during their 1969 mission, with radio transmissions describing it as a "base" before NASA abruptly cut the signal.
The unverified encounter was recounted in conspiracy literature like the 2001 book Dark Moon: Apollo and the Whistle-Blowers by Mary Bennett and David Percy.
Anita Mitchell, who was married to the late NASA pilot Edgar Mitchell, the sixth man to walk on the moon in 1971, told the Daily Mail: 'He always felt that there were UFOs out there, because so many of the pilots and astronauts had seen something.'
Gregg Braden claimed that astronauts have made deathbed confessions of what they really saw on the moon, including ancient buildings and inscriptions (Stock Image)
'I think when our space program was active, there were broadcasts from the lunar surface that were cut off, and astronauts had seen things that they were not allowed to see and not allowed to share,' Braden claimed during the podcast.
'Some of them are leaving this world now, and on their deathbed, they can't believe that this hasn't been made, made public already. So there have been recordings and videos and things, and I think they're authentic,' the author continued.
'They're going to see inscriptions in languages that we already recognize. And that will be the smoking gun,' Braden declared.
Braden and Rogan argued that there was even more evidence suggesting human history may extend beyond the conventional 200,000 to 300,000-year timeline, citing discoveries like a debated million-year-old skull from China.
The fossil has been linked to the extinct species known as Denisovans, suggesting modern humans or our close relatives existed far earlier than records have shown.
A recent discovery of ancient skull suggested that Homo sapiens began to emerge over one million years ago, pushing back our species' origins by 400,000 years
Study author Chris Stringer, an anthropologist at the Natural History Museum, said the 'landmark' findings offered an important window into our evolutionary past.
'Fossils like this one just show how much we still have to learn about our origins,' he said.
Braden claimed that, during this ancient time in history, human genes were intentionally modified by an unknown event that propelled humanity to become advanced beings.
He highlighted the 2005 study of human chromosome 2, which carries genes that help control many body functions, like brain development, vision, hearing, and immunity.
While scientists have attributed its creation to a natural mutation, chromosome 2 has displayed a strange fusion of two ancestral chromosomes that have the signs of modern gene editing.
'The kicker is that we can now look at the DNA and reverse engineer it and say, what did it take to get where we are?' Braden said, calling the evidence of advanced ancient humans 'the smoking gun.'
Mysterious “String” Spotted by Mars Rover Suddenly Disappears
NASA's Mars Perseverance rover acquired this image of the area in front of it using its onboard Front Right Hazard Avoidance Camera A. The image was acquired on July 12, 2022 (Sol 495), at the local mean solar time of 16:56:25.
(Image Credit: NASA/JPL-Caltech)
Mysterious “String” Spotted by Mars Rover Suddenly Disappears
A piece of string-like material photographed on Mars by the Perseverance Rover just last week has suddenly disappeared, according to recent NASA photos obtained by its rover on the Red Planet.
The wiry-looking substance many likened to a piece of string or thin pasta first appeared in photographs taken by the rover on July 12th, photos that were shared by NASA earlier this week. However, a photo taken four days later shows the string has somehow disappeared.
Photo taken by Perseverance on July 12 shows Martian “string”
Image Credit NASA/JPL-CalTech
Photo taken by Perseverance on July 16 reveals the “string” has disappeared.
Image Credit NASA/JPL-CalTech
Since landing on the red planet, humanity’s various rovers have made a habit of taking odd, unusual, often perplexing photos. In some cases, like the “flower” or recently discussed “door” on Mars, the photos ultimately proved to be natural formations instead of foreign objects.
Of course, Martian rovers bring their own junk with them. And many of the more infamous photos sent back from those rovers are of their own pieces of human-made debris.
NASA’s experts told the media the recent photograph is likely something artificial and not a natural formation masquerading as a manufactured object. However, rather than a remnant of a kite flown by E.T. on his Martian holiday, the same experts say this string was also probably a piece of material from the rover’s landing rocket.
“The string could be from the rover or its descent stage, a component similar to a rocket-powered jet pack used to lower the rover to the planet’s surface safely,” a Perseverance mission spokesperson at NASA’s Jet Propulsion Laboratory toldCNN.
The same spokesperson concedes that the string was photographed in an area not previously visited by Perseverance but guessed that the string likely blew there on its own.
Either that. Or it has a completely different origin.
Adding more mystery to the mystery, when the rover passed over the same spot on July 16th, the string had magically disappeared. Once again, most suggest that the string left the same way it arrived, on a gust of wind.
Still, given the incredibly thin Martian atmosphere and the great lengths designers had to go through just to get the Ingenuity helicopter to grasp that atmosphere and take flight, it would take some mighty gusts of wind to send that string into and out of the same spot within a four day period. So, for now, at least, the mystery of the Martian string remains.
Follow and Connect with Author Christopher Plain on Twitter @plain_fiction
On October 3, interstellar comet 3I/ATLAS flew past Mars. This encounter was monitored by a fleet of spacecraft studying the Red Planet.
Interstellar comet 3I/ATLAS in a photograph taken by the Gemini South Observatory. Source: International Gemini Observatory/NOIRLab/NSF/AURA/Shadow the Scientist
Comet 3I/ATLAS was discovered in early July. It became the third confirmed object of interstellar origin found in our Solar System. At the same time, it differs significantly from its predecessors in many of its characteristics. 3I/ATLAS is larger than Borisov’s interstellar comet and the asteroid Oumuamua, moves at a higher speed, and is most likely several billion years older than the Solar System.
On its journey through the Solar System, 3I/ATLAS will make several relatively close flybys of planets. One of them took place on October 3. On that day, 3I/ATLAS passed 30 million km from Mars.
A comet in the Martian sky in an artist’s impression. Source: Kim Poor
Space agencies decided to take advantage of this unique opportunity to learn more about the visitor from another star system. In its statement, ESA reported that between October 1 and 7, the Mars Express and TGO spacecraft orbiting Mars would monitor the comet using their cameras and spectrometers. On NASA’s side, the LRO spacecraft will participate in tracking the interstellar visitor, as well as the Psyche mission, which is heading towards the asteroid Psyche.
Current observations are very important, as 3I/ATLAS is rapidly approaching the Sun. In the coming days, this will make it impossible to track it using ground-based observatories, and astronomers will have no choice but to rely on spacecraft.
ESA observation plan for interstellar comet. Source: ESA
On October 29, 3I/ATLAS will reach the perihelion of its orbit, approaching the Sun at a distance of 203 million km. At this point, the comet will reach its peak activity. By studying the composition of the gases evaporating from its nucleus, scientists will be able to learn about the structure of other star systems. At this point, the comet will still be inaccessible to ground-based telescopes, but fortunately, one spacecraft will be in a suitable position to make observations. It is about the European JUICE mission. It will monitor the comet between November 2 and 25.
By December, 3I/ATLAS will once again be visible to Earth-based telescopes. The comet will not approach our planet. The minimum approach distance will be 269 million km, which is almost twice the distance between the Earth and the Sun.
In March 2026, 3I/ATLAS will fly by Jupiter at a distance of 53 million km. In theory, the Juno spacecraft, which is exploring the gas giant, could participate in its observations. After that, 3I/ATLAS will head off into deep space and never come back to the Solar System.
Scientists analyzing archived data from the Cassini mission have discovered new complex organic molecules being ejected from Saturn’s moon Enceladus. This is a clear sign that complex chemical reactions are taking place in its underground ocean. Some of them may be part of chains leading to the formation of even more complex molecules that are potentially biologically significant.
Enceladus geyser eruptions. Source: NASA/JPL/Space Science Institute
In 2005, Cassini discovered the first evidence that an ocean lies beneath Enceladus’ icy surface. Water sprays out of cracks near the moon’s south pole, ejecting ice particles into space. Some of these tiny pieces of ice, smaller than grains of sand, fall back onto the surface of the moon, while others fly away and form the E ring around Saturn.
During its mission, Cassini flew through this ring several times and analyzed it using its instruments. In particular, the vehicle detected many organic molecules in its ice grains, including amino acid precursors.
Internal structure of Enceladus. Source: Graphic composition: ESA; Surface: NASA/JPL-Caltech/Space Science Institute/Lunar and Planetary Institute
The problem was that the ice grains in the ring could be hundreds of years old. As they aged, they could have been subject to “weathering” and changed under the influence of intense cosmic radiation. Scientists wanted to study fresh grains ejected much later to better understand what exactly was going on in Enceladus’ ocean.
Fortunately, researchers already had this data. Back in 2008, Cassini flew right through a fresh plume from Enceladus. Uncontaminated ice grains struck the CDA dust analyzer at a speed of approximately 18 km/s. These were not only the freshest ice grains Cassini had ever detected, but also the fastest.
Speed was of the essence. At lower impact speeds, the ice breaks up, and the signal from clusters of water molecules can mask the signal from certain organic molecules. But when ice grains hit the CDA quickly, water molecules don’t stick together, which has made it possible to see signals previously hidden.
Organic molecules in Enceladus’ ocean. Source: NASA/JPL-Caltech
After analyzing all the available data, scientists were able to determine which molecules were present inside the fresh ice grains. Some of them had previously been detected in the E ring, confirming that they originate from Enceladus’ ocean.
Completely new molecules were also found that had never before been encountered in Enceladus’ ice grains. These included aliphatic, (hetero) cyclic esters/alkynes, esters/ethyls, and presumably compounds containing nitrogen and oxygen. On Earth, these molecules participate in chains of chemical reactions that ultimately lead to the formation of more complex molecules necessary for life.
ESA mission concept to Enceladus. Source: ESA
This discovery is important for future missions that will study Enceladus and search for life in its ocean. ESA recently began preliminary design work on such a mission, which could be launched in the early 2040s.
Using data collected by the Cassini spacecraft, scientists have found that these ice crystals are packed with complex organic molecules.
According to a new study, some of these molecules could be part of the chain of chemical reactions that ultimately lead to life.
The researchers say this discovery means Enceladus now 'ticks all the boxes' to be a world capable of supporting life.
The moon has a constant supply of liquid water, a source of energy from hydrothermal vents, and the right set of chemical elements and complex organic molecules.
Lead researcher Dr Nozair Khawaja, of Freie Universität Berlin, says: 'Even not finding life on Enceladus would be a huge discovery, because it raises serious questions about why life is not present in such an environment when the right conditions are there.'
Scientists have found that grains of ice spewed from Enceladus, Saturn's sixth–largest moon, contain organic compounds that could lead to life. Pictured: Enceladus' south pole as seen by the Cassini spacecraft
The European Space Agency found that water forced up from the underground ocean carried a set of complex organic molecules that are likely produced by chemical reactions around deep hydrothermal vents
What is Enceladus?
Enceladus is Saturn's sixth–largest moon, at 313 miles wide (504 kilometres).
It is an icy satellite with hydrothermal activity – a rare combination – with vents spewing water vapour and ice particles out from a global ocean buried beneath the moon's frozen crust.
According to NASA observations, the plume includes organic compounds, volatile gases, carbon dioxide, carbon monoxide, salts, and silica.
Microbes on our planet either produce these compounds or use them for growth, leading some to speculate that tiny organisms live in Enceladus' hidden ocean.
On the surface, conditions are exceptionally cold with temperatures as low as –201°C (–330°F).
However, in 2005, scientists discovered that a huge liquid ocean was actually trapped beneath the icy shell.
Jets of water erupt like geysers through cracks near the South Pole and, while some fall back down to the surface, some escape and form a ring around Saturn that traces the moon's orbit.
Dr Khawaja says: 'Cassini was detecting samples from Enceladus all the time as it flew through Saturn's E ring.
'We had already found many organic molecules in these ice grains, including precursors for amino acids.'
But some of these grains were hundreds of years old, so the scientists couldn't be sure whether the chemicals within had been altered by radiation from the sun.
In 2005, the Cassini spacecraft discovered striking tectonic faults at the south pole known as 'tiger stripes' (bottom right). These allow ice to escape from the oceans into space
Some of the ice falls back to the lunar surface, but much of it escapes into space, where it forms a ring around Saturn. In 2005, the Cassini spacecraft gathered samples from this ring and found that the ice contained organic molecules. Pictured: Artist's impression of Enceladus' surface
That changed when Cassini flew straight through Enceladus' spray in 2008, gathering ice crystals on its Cosmic Dust Analyser (CDA) as they emerged from the moon's interior.
As Cassini whipped through the cloud at 11 miles per second (18 km/s), it gathered the freshest and fastest ever collected.
That speed actually makes a big difference to the quality of the data, since it helps scientists separate water from other interesting molecules.
'At lower impact speeds, the ice shatters, and the signal from clusters of water molecules can hide the signal from certain organic molecules,' explains Dr Khawaja.
'But when the ice grains hit CDA fast, water molecules don't cluster, and we have a chance to see these previously hidden signals.'
After spending years working through the vast amounts of data collected by Cassini, Dr Khawaja and his co–authors have finally confirmed that these fresh ice crystals also contain organic molecules.
Those molecules included some that had been found around Saturn and some new chemicals that hadn't been detected before.
That means the molecules found in Saturn's ring and in Enceladus' ice geyser must be formed within the moon's ocean, not created later by reactions with solar radiation.
Cassini (artist's impression) was able to fly directly through the plumes of ice emerging from the south pole and gather tiny particles of ice at extremely high speeds. This proved that the organic molecules found in Saturn's ring were formed in Enceladus' ocean
On Earth, these molecules are part of the chemical reactions that lead to life. This means that the moon now 'ticks all the boxes' to be a habitable world capable of sustaining living organisms
On Earth, these organic molecules are involved in the chains of chemical reactions which lead to life, raising the tantalising possibility that Enceladus could be home to life.
Dr Khawaja says: 'There are many possible pathways from the organic molecules we found in the Cassini data to potentially biologically relevant compounds, which enhances the likelihood that the moon is habitable.'
In the future, ESA is planning to launch a mission to Enceladus that will collect more grains of ice from the South Pole plumes and even land on the moon's surface.
This would be the first time that any space agency has landed on Enceladus and could reveal more details about the possible conditions for life.
Cassini launched from Cape Canaveral, Florida in 1997, then spent seven years in transit followed by 13 years orbiting Saturn.
An artist's impression of the Cassini spacecraft studying Saturn
In 2000 it spent six months studying Jupiter before reaching Saturn in 2004.
In that time, it discovered six more moons around Saturn, three-dimensional structures towering above Saturn's rings, and a giant storm that raged across the planet for nearly a year.
On 13 December 2004 it made its first flyby of Saturn's moons Titan and Dione.
On 24 December it released the European Space Agency-built Huygens probe on Saturn's moon Titan to study its atmosphere and surface composition.
There it discovered eerie hydrocarbon lakes made from ethane and methane.
In 2008, Cassini completed its primary mission to explore the Saturn system and began its mission extension (the Cassini Equinox Mission).
In 2010 it began its second mission (Cassini Solstice Mission) which lasted until it exploded in Saturn's atmosphere.
In December 2011, Cassini obtained the highest resolution images of Saturn's moon Enceladus.
In December of the following year it tracked the transit of Venus to test the feasibility of observing planets outside our solar system.
In March 2013 Cassini made the last flyby of Saturn's moon Rhea and measured its internal structure and gravitational pull.
Cassini didn't just study Saturn - it also captured incredible views of its many moons. In the image above, Saturn's moon Enceladus can be seen drifting before the rings and the tiny moon Pandora. It was captured on Nov. 1, 2009, with the entire scene is backlit by the Sun
In July of that year Cassini captured a black-lit Saturn to examine the rings in fine detail and also captured an image of Earth.
In April of this year it completed its closest flyby of Titan and started its Grande Finale orbit which finished on September 15.
'The mission has changed the way we think of where life may have developed beyond our Earth,' said Andrew Coates, head of the Planetary Science Group at Mullard Space Science Laboratory at University College London.
'As well as Mars, outer planet moons like Enceladus, Europa and even Titan are now top contenders for life elsewhere,' he added. 'We've completely rewritten the textbooks about Saturn.'
The quest to understand dark matter and dark energy is one of modern science's most perplexing questions.
Now, one physicist has proposed a controversial solution: dark matter is nothing more than an illusion.
According to Professor Rajendra Gupta of the University of Ottawa, astronomers haven't been able to find any dark matter particles because they simply do not exist.
Instead, Professor Gupta argues that the effects attributed to these 'exotic matters' can be explained by the fundamental forces of the universe changing over time.
The laws of physics, which scientists use to make predictions about the world, are underpinned by constants, such as the speed of light and the force of gravity.
However, according to some physicists, these 'constants' aren't actually all that constant.
Instead, these fundamental features evolve and change as the universe ages in a way that might explain why it looks like we have dark matter and dark energy.
In his paper, Dr Gupta claims: 'Dark matter and dark energy...may be considered emerging from the weakening of the forces of nature in an expanding Universe.'
The quest to understand dark matter is one of modern science's most pressing questions. But now, one physicist says that dark matter could be nothing more than an illusion.
(artist's impression)
Scientists first started taking dark matter seriously in the 1970s when the astronomer Vera Rubin noticed that galaxies' outermost stars were rotating much faster than expected.
Scientists currently estimate that dark matter makes up around 27 per cent of the universe, while dark energy makes up about 68 per cent – leaving normal matter to account for a meagre five per cent.
This theory, known as the Lambda Cold Dark Matter Model (ΛCDM), works really well to explain everything from supernovae to the Big Bang.
The problem is that, even after 50 years of research, scientists still have no idea what dark matter or dark energy really are.
Professor Gupta's idea is to try to explain everything that dark matter currently does, without the need for any strange forces or exotic particles.
The basic idea is that, if the fundamental constants vary, we can take those varying 'covarying coupling constants' and put them into Einstein's equations for cosmic expansion.
Scientists think that dark matter makes up about 80 per cent of all matter in the universe, but it isn't directly visible. Instead, scientists infer its existence from its gravitational interactions with other objects
Why do scientists think dark matter exists?
Scientists believe in the existence of dark matter because the universe seems to contain more mass than all the visible matter can account for.
In the 1970s, the astronomer Vera Rubin noted that the outermost stars of galaxies were rotating nearly as fast as those near the core.
According to normal physics, this shouldn't be possible.
The explanation was that there was some extra 'hidden' matter that was exerting a gravitational pull on those outer stars.
Although dark matter cannot be observed and does not interact with conventional matter, astronomers rely on its gravitational effects to explain many details of the universe's evolution.
When we do this, we get two purely mathematical terms called alpha–matter and alpha–energy that behave just like dark matter and dark energy.
What makes this theory really interesting is that the amount by which the constants vary changes depending on how much matter is concentrated in one place.
At the heart of a galaxy where there is lots of normal matter, physics behaves just like we would expect.
However, out in the far–flung edges of a galaxy where matter is very sparse, the constants become weaker and the effects of alpha–matter become more noticeable.
This means there is a point at which matter became sparse enough for alpha–matter and alpha–energy effects to take over from conventional physics, known as the 'turn–off density'.
According to Professor Gupta, this explains why galaxies' outermost stars are moving faster than they should be compared to stars in the inner core.
In his new paper, Professor Gupta compares his model's predictions to real observations of seven galaxies of varying sizes.
The model reproduced the curve of the rotating galaxy and predicted where the turn–off density would need to be.
Instead of proposing that the universe is filled with dark matter like other scientists have done, Professor Rajendra Gupta, of the University of Ottawa, thinks that the supposed effects of dark matter can be explained by changes in the universe's fundamental constants. Pictured: The largest map of dark matter ever produced
Across the seven galaxies, the required turn–off density varied by a factor of four, despite the size of the galaxies varying by a factor of eight.
Professor Gupta argues that this consistency suggests that alpha–energy and alpha–matter are real features of the universe and not just theoretical contrivances.
If that is right, then scientists could get rid of dark matter and dark energy from their theories and still explain everything about the universe.
Professor Gupta says: 'The emergent alpha–matter and alpha–energy can, in principle, replace dark matter in galaxy clusters and assist in galaxy formation.
This theory also makes predictions, which scientists should be able to test.
If alpha–matter has less of an effect when the universe is denser, then more distant galaxies seen further back in time should be more dominated by the effects of visible matter.
However, the big problem for Professor Gupta's theory is that there is no more evidence that universal constants are variable than there is for the existence of dark matter particles.
There is currently no evidence to suggest that something like the speed of light or the gravitational constant has ever been different, and assuming that they are would require major changes to our theories about the universe.
If this is right, then projects that are attempting to map dark matter, such as the Dark Energy Survey Collaboration (pictured), are simply wasting their time
Observations of extremely distant and bright objects known as quasars show that, even much closer to the Big Bang, these constants are just the same as they are now.
Professor Gupta is planning to extend his approach to analyse gravitational lensing and galaxy cluster dynamics, which would be a good test for the theory.
But, with dark matter currently being our best bet about the nature of the universe, a lot more evidence will be needed to overturn the scientific consensus.
Dark matter is a hypothetical substance said to make up roughly 85 per cent of the universe.
The enigmatic material is invisible because it does not reflect light, and has never been directly observed by scientists.
Astronomers know it to be out there because of its gravitational effects on known matter.
The European Space Agency says: 'Shine a torch in a completely dark room, and you will see only what the torch illuminates.
Dark matter is a hypothetical substance said to make up roughly 27 per cent of the universe. It is thought to be the gravitational 'glue' that holds the galaxies together
(artist's impression)
'That does not mean that the room around you does not exist.
'Similarly we know dark matter exists but have never observed it directly.'
The material is thought to be the gravitational 'glue' that holds the galaxies together.
Calculations show that many galaxies would be torn apart instead of rotating if they weren't held together by a large amount of dark matter.
Just five per cent the observable universe consists of known matter such as atoms and subatomic particles.
Embedded in a rotating spiral of gas and dust, the planet pulls in a constant stream of new matter to feed its growth, in a process called accretion.
However, while this was the fastest accretion burst ever recorded, the researchers believe that this is the planet's 'last trickle' of growth.
Study co-author Dr Alexander Scholz, an astronomer from the University of St Andrews, told Daily Mail: 'This rogue planet is pretty much finished with its growth.
'The really strong growth spurts would have happened earlier, while the object was still enshrouded in dust and gas, invisible to us.'
Scientists have been baffled by a young rogue planet which has put on a record-breaking growth spurt, hoovering up six billion tonnes of gas and dust every second
(artist's impression)
Although Cha 1107-7626 is now between five and 10 times the size of Jupiter, the rogue planet is still in its infancy.
During this period of their existence, these lonely objects can sometimes begin extremely rapid periods of growth known as accretion bursts.
Most of these bursts occur at the earliest moments of a rogue planet's formation, when it is still shrouded in dust that telescopes can't penetrate.
Dr Scholz says: 'When we can observe them, they are already close to the finished products. The really exciting early evolution happens when they are embedded in a thick cloud. '
However, using the European Southern Observatory's Very Large Telescope, scientists were able to catch the rogue planet as it entered a particularly rapid growth spurt.
Over a period of a few weeks, the rogue planet's accretion rate increased by almost eight times, reaching a peak in August and staying at that level for several months.
Lead researcher Dr Víctor Almendros-Abad, an astronomer at the National Institute for Astrophysics in Italy, says: 'This is the strongest accretion episode ever recorded in a planetary-mass object.
'People may think of planets as quiet and stable worlds, but with this discovery we see that planetary-mass objects freely floating in space can be exciting places.'
Located in the Chamaeleon constellation around 620 light-years from Earth, the planet known as Cha 1107-7626 is a 'rogue planet'. This means it does not orbit any star. Pictured: an infrared image showing the planet's location in the centre of frame
What is a rogue planet?
A rogue planet is a term used to refer to anything the same size as a planet that is free-floating through space.
Instead of orbiting a star like the Earth does, rogue planets exist on their own.
Besides the lack of a star, rogue planets share many features with normal planets, including atmospheres and internal structures.
However, scientists think that they may form in a very different way from planets that orbit stars.
Rogue planets might form directly from clouds of floating gas, in a process much closer to how a star is formed.
Scientists still aren't exactly sure what causes such sudden and powerful bursts of accretion.
Some theories suggest that nearby companion objects might trigger a sort of avalanche in the accretion disc, while others propose that the burst might be caused by instabilities in the surrounding nebula.
This new study doesn't settle that debate, but by looking at the light coming from the planet before and after the burst, the researchers were able to reveal new details about the accretion process.
Using the James Webb Space Telescope, Dr Almendros-Abad and his colleagues found that there was now water vapour in the disk around the planet that hadn't been there before.
Likewise, the scientists were able to show that the planet's magnetic field actually played a major role in funnelling material from the inner edge of the disc into the planet.
This is strikingly similar to how stars use their magnetic fields to feed on gases in the early stages of their lives.
Scientists had long thought that the rogue planets and stars might grow in similar ways.
For example, stars also grow through accretion bursts in which they gather most of their mass in short spurts, followed by long lulls.
Scientists believe that this kind of rogue planet might form in a very similar way to how stars are born, pulling in gas and dust to form a disc around itself. This discovery further 'blurs the line' between rogue planets and stars. Pictured: A visible light image of the planet's location
Dr Amelia Bayo, an astronomer at the European Southern Observatory, says: 'The idea that a planetary object can behave like a star is awe-inspiring and invites us to wonder what worlds beyond our own could be like during their nascent stages.'
According to our current understanding, a star and its planets form out of a collapsing cloud of dust and gas within a larger cloud called a nebula.
As gravity pulls material in the collapsing cloud closer together, the centre of the cloud gets more and more compressed and, in turn, gets hotter.
This dense, hot core becomes the kernel of a new star.
Meanwhile, inherent motions within the collapsing cloud cause it to churn.
As the cloud gets exceedingly compressed, much of the cloud begins rotating in the same direction.
The rotating cloud eventually flattens into a disk that gets thinner as it spins, kind of like a spinning clump of dough flattening into the shape of a pizza.
These 'circumstellar' or 'protoplanetary' disks, as astronomers call them, are the birthplaces of planets.
When it comes to habitable places in our solar system, the tiny moons of Saturn don’t seem likely candidates. Yet time and time again, they’ve proven themselves to be exciting places for life. Europa, Titan, and Enceladus all have a claim to potential habitability. A new study just made Enceladus even more interesting.
View of Enceladus. NASA/JPL/Space Science Institute.
In 2005, Cassini found the first evidence that Enceladus has a hidden ocean beneath its icy surface. After that, Enceladus has teased scientists for years with its spectacular plumes. Chemical analyses showed that this alien ocean contained salts and simple organic molecules. Already, you’ve got water, salt, and organic molecules necessary for life.
But it gets better.
Scientists, re-examining data from NASA’s Cassini mission, have identified a fresh batch of organic molecules bursting from Enceladus’s depths, including types never before seen there. They found esters, which give fruits their smell on Earth. They also observed ethers and alkenes, crucial chemical connectors, and other complex molecules containing nitrogen and oxygen. In other words, the chemistry on Enceladus looks even more promising for life.
Old Ice, New Ice
The new study is an analysis of already existing data. The Cassini spacecraft orbited Saturn for 13 years, and its Cosmic Dust Analyzer (CDA) was designed to scoop up tiny dust and ice particles and analyze what they were made of.
On one of its 22 fly-bys of Enceladus, a maneuver codenamed “E5,” Cassini did something unique: it flew faster and closer than ever before, plunging through the densest part of the plues at a staggering speed of nearly 18 kilometers per second (over 40,000 miles per hour). This speed was key.
Jets of water burst from cracks in Enceladus’ South Pole all the time. Some of them fall back onto the moon’s surface, while others escape and form a ring around Saturn that traces Enceladus’ orbit. Smaller than grains of sand, some of the tiny pieces of ice fall back onto the moon’s surface, whilst others escape and form a ring around Saturn that traces Enceladus’s orbit. Scientists call this the E ring.
“Cassini was detecting samples from Enceladus all the time as it flew through Saturn’s E ring. We had already found many organic molecules in these ice grains, including precursors for amino acids,” says lead author Nozair Khawaja.
The ice grains in the ring can be hundreds of years old. They have been weathered and may have undergone chemical changes. Scientists wanted fresh grains. This is where the E5 mission came into play. It gathered particles straight from Enceladus, not from the ring. This speed made another key difference. At lower velocities, when the CDA instrument captured ice grains, the impact was relatively gentle. The water molecules in the ice would often clump together, creating “water-cluster species” that could mask the signals of the more interesting organic compounds hidden within.
“The ice grains contain not just frozen water, but also other molecules, including organics. At lower impact speeds, the ice shatters, and the signal from clusters of water molecules can hide the signal from certain organic molecules. But when the ice grains hit CDA fast, water molecules don’t cluster, and we have a chance to see these previously hidden signals.”
Tantalizing Chemistry
So, what are these new molecules, and why do they matter so much?
The study confirmed the presence of compounds seen before, like aryl groups (ringed structures like benzene) and other simple oxygen-bearing molecules. But the new detections have opened up entirely new possibilities for the chemistry of Enceladus.
One group includes esters and alkenes. On Earth, esters are known for creating the pleasant smells of fruits like pineapples and pears. In biology, they form the chemical bonds in lipids, the molecules that make up cell membranes. Alkenes are highly reactive molecules that are key intermediates in the synthesis of more complex organic structures.
They also found strong evidence for ethers and ethyl groups. Ethers are molecules in which an oxygen atomacts as a bridge between two carbon chains. This structure makes them excellent building blocks for larger, more complex macromolecules. The detection of these compounds hints that Enceladus’s ocean can create the organics and link them together.
Perhaps most tantalizingly, the analysis revealed complex spectra that suggest the presence of molecules containing both nitrogen and oxygen. This includes possible derivatives of compounds like pyrimidine, a core component of the nucleobases in DNA and RNA. While the data isn’t sharp enough to identify specific molecules like thymine, the fragments strongly suggest a rich chemistry involving nitrogen, an absolutely essential element for life as we know it.
What Does This All Mean?
Depiction of a fissure through which water can eject from the surface. Image credits: NASA.
All this reads a bit like “tell me you found life on Enceladus without telling me.” Sure, there are other plausible mechanisms through which these molecules could be there. There isn’t any smoking gun for evidence of life. But all of this fits perfectly well with a habitable subsurface ocean.
“There are many possible pathways from the organic molecules we found in the Cassini data to potentially biologically relevant compounds, which enhances the likelihood that the moon is habitable,” says Nozair. “There is much more in the data that we are currently exploring, so we are looking forward to finding out more in the near future.”
Based on what we know now, it appears that Enceladus has all the necessary ingredients for life. We know it has a liquid water ocean. We know that ocean is salty and in contact with a rocky core. And we have strong evidence for hydrothermal vents — cracks in the moon’s seafloor where hot, mineral-rich water churns up from the interior, creating chemical energy.
Here on Earth, such vents are vibrant ecosystems, powered not by sunlight but by chemical reactions. They are considered one of the most likely places for life to have originated. The detection of these new, relatively complex organic molecules on Enceladus suggests that similar life-powering chemistry could be happening right now, 800 million miles away.
The Legacy of Cassini
The Cassini mission officially ended in 2017 when the craft plunged into Saturn’s atmosphere, but its legacy is a gift that keeps on giving. The data it collected continues to be a treasure trove. But if we want to truly confirm whether Enceladus has life, we will need to go back with a new generation of tools designed for that specific purpose.
Cassini was a scout, and an excellent one at that. It proved that Enceladus is a habitable world, but its instruments weren’t built to find inhabitants. A future mission would need to be a dedicated astrobiology probe, one that could analyze freshly-plucked ice grains with even greater sensitivity, or maybe even dive into the planet.
Wat gebeurt er als de magnetische polen van de aarde omdraaien? Het magnetische veld van de aarde onderscheidt haar van de omringende planeten van ons zonnestelsel. Het is een ongelooflijk sterke kracht in het centrum van onze wereld en zijn primaire rol is om onze atmosfeer te beschermen. Zonnewinden, kosmische straling en enorme wolken plasma worden tegengehouden door het schild van de magnetosfeer van de aarde. In een constant bewegend energieveld gedragen de polen van de aarde zich als de verschillende uiteinden van een magneet. Deze polen verschuiven en veranderen ongeveer elke 300.000 jaar van plaats. Het lijkt erop dat we over tijd zijn voor een poolomwenteling; maar wat betekent dat precies?
LEES verder om te ontdekken of mensen een omkering van de magnetische polen van de aarde kunnen overleven.
Afnemende kracht Sommige wetenschappers denken dat het aardmagnetisch veld in sterkte afneemt net voordat het volledig omkeert - iets wat het in het verleden al verschillende keren heeft gedaan.
Afnemende kracht Met andere woorden, als hun magnetisme blijft afnemen, kan dit een poolomwenteling veroorzaken, waarbij noord zuid wordt en zuid noord.
Magneetveld draait om Magnetic field flips aren't all that common. On average, they've happened around every 200,000 to 300,000 years. But the last one was 780,100 years ago, so some believe we're overdue a change.
A temporary flip However, this doesn't include a temporary flip that occurred 41,000 years ago. The reversal only stuck for 250 years before switching back to the positions the poles remain in today.
Midden-oceaanruggen Midden-oceaanruggen leveren bewijs van geomagnetische omkeringen. Dit komt doordat tektonische platen van de aardkorst (lithosfeer) uit elkaar bewegen en worden opgevuld met magma.
Magnetische velden Magnetische velden worden opgewekt door bewegende elektrische ladingen. In een staafmagneet zijn de bewegende ladingen elektronen die rondjes draaien in atomen. In de aarde zijn het elektronen die worden verplaatst door circulerende stromen gesmolten ijzer.
Gesmolten ijzeren buitenkern De reden dat poolomwentelingen plaatsvinden is nog steeds een mysterie. Wetenschappers denken echter dat het iets te maken heeft met de gesmolten ijzeren buitenkern van de aarde.
Gesmolten ijzeren buitenkern De rotatie van de gesmolten ijzeren buitenkern van de aarde genereert het magnetische veld. De kern koelt langzaam af en er ontstaat beweging door convectie. Stel het je voor als water dat kookt in een steelpan.
Het magnetische veld Maar er is een groot verschil tussen dit proces en een kokende steelpan: er zijn bewegende ladingen aanwezig die het magnetische veld genereren.
Dynamoproces Dit wordt een zelfopwindend dynamoproces genoemd, waarbij de elektrische stromen die in het langzaam bewegende gesmolten ijzer vloeien een magnetisch veld creëren.
Positieve feedbacklus Het magnetische veld induceert vervolgens elektrische stromen. Deze stromen genereren op hun beurt hun eigen magnetische veld dat meer elektrische stromen induceert, in een positieve terugkoppelingslus.
Chaos en mysterie Er ontstaat veel chaos en turbulentie als de gesmolten ijzerkern ronddraait. Deze turbulentie is de meest geaccepteerde verklaring voor poolomkering, maar niemand kan het op dit moment met zekerheid zeggen. Het is nog steeds een mysterie.
Lijnen van aantrekking Magnetische polen bevinden zich waar de magnetische aantrekkingslijnen de aarde binnenkomen. Voor een polariteitsomkering moet het magnetische veld met ongeveer 90% verzwakken tot een drempelniveau. Dit proces kan duizenden jaren duren.
Het World Magnetic Model (WMM) Het World Magnetic Model (WMM), dat gezamenlijk is ontwikkeld door het Amerikaanse National Geophysical Data Center en de British Geological Survey, is een grootschalige ruimtelijke weergave van het magnetische veld van de aarde.
Locatie De noordelijke magnetische pool, ook wel de geomagnetische noordpool genoemd, bevindt zich momenteel bij 80,8 graden noord bij 72,7 graden west, in het Canadese Ellesmere Island.
De bewegende noordelijke magnetische pool In 2022 werd gemeld dat de noordelijke magnetische pool zich zo grillig uit het Canadese noordpoolgebied in de richting van Siberië bewoog dat wetenschappers er verbaasd over waren.
De bewegende noordelijke magnetische pool De snelheid waarmee de noordelijke magnetische pool beweegt is sinds het midden van de jaren 90 toegenomen van 15 kilometer per jaar tot 55 kilometer per jaar. De afgelopen jaren is hij zelfs over de internationale datumlijn richting het oostelijk halfrond geslingerd.
Stokken omgooien Het omdraaien van de magnetische polen betekent niet dat de aarde geen magnetisch veld meer zou hebben. Stel je echter voor dat je kompas naar het noorden blijft wijzen, terwijl je eigenlijk naar het zuiden kijkt.
Stokken omgooien Het goede nieuws is dat het leven heeft overleefd en gedijt ondanks poolomwentelingen in het verleden. Het betekent geen wereldwijde catastrofe.
De effecten van een flip Tijdens zonnestormen is er een groter dan normale instroom van energetische deeltjes, die voor ons meestal onschadelijk zijn. Maar voor onze moderne technologie is het een ander verhaal.
Het effect op technologie Geladen deeltjes uit de zonnewind (waar ons magnetisch veld ons normaal gesproken tegen beschermt) zouden verwoestende effecten kunnen hebben op de aarde als de polen zouden omslaan.
De gebeurtenis in Carrington In 1859 maakte een krachtige geomagnetische storm poollicht zichtbaar in het Caribisch gebied en de telegraafsystemen vielen uit. In die tijd waren operators echter in staat om het systeem zonder stroom te laten werken
Meer impact Als zo'n gebeurtenis vandaag de dag zou gebeuren, zou het, gezien onze afhankelijkheid van technologie, veel vernietigender kunnen zijn. Maar het is een worst-case scenario.
Meerdere palen Er kunnen zich ook meerdere polen vormen wanneer er een omkering plaatsvindt, waardoor navigatiesystemen in de war raken. Maar dit proces kan honderden of zelfs duizenden jaren duren.
Geomagnetische activiteit Het is ook belangrijk om op te merken dat eerdere poolomkeringen niet per se betekenen dat de omkering leidde tot meer vulkanen, aardbevingen of klimaatveranderingen.
Depiction of the Pioneer probes descending to Venus' atmosphere. Credit - NASA
Reanalyzing old data with our modern understanding seems to be in vogue lately. However, the implications of that reanalysis for some topics are more impactful than others. One of the most hotly debated topics of late in the astrobiological community has been whether or not life can exist on Venus - specifically in its cloud layers, some of which have some of the most Earth-like conditions anywhere in the solar system, at least in terms of pressure and temperature. A new paper from a team of American researchers have just added fuel to that debate by reanalyzing data from the Pioneer mission to Venus NASA launched in the 70s - and finding that the Venus’ clouds are primarily made out of water.
That doesn’t mean that it’s water in the traditional sense of how we think water vapor makes up clouds here on Earth. The dihydrogen monoxide in Venus’ clouds seems to be tied up in hydrated materials rather than stand alone as pure water droplets. But that is still a drastic change from our current understanding that Venus’ clouds are made up primarily of sulfuric acid. There is still some of that floating around - 22% of the cloud material according to the paper - but how could the scientists of the 70s be so far off the mark in terms of the readings of their instruments?
To answer that required some scientific sleuthing from a series of researchers at various institutions, including Cal Poly Pomona, the University of Wisconsin, Arizona State, and even NASA itself, to uncover the old Pioneer data. It had been stored on microfilm in NASA’s Space Science Data Coordinated Archive office - so the first step in reanalyzing the data was to fish it from the archives and digitize it.
Fraser discusses why Venus is so interesting to study.
Inspiration for the idea came from a conversation between Rakesh Mogul of Cal Tech Pomona and Sanjay Limaye a Venus expert of the University of Wisconsin, who were talking about the composition of Venus’ clouds and then agreed they should reanalyze the mass spectrometry data Pioneer originally collected, as they thought there might be some new insights to glean there.
Turns out there were. The data came from two instruments on board Pioneer Venus Large Probe - part of the Pioneer mission that descended through Venus’ clouds - the Neutral Mass Spectrometer (LNMS) and the Gas Chromatograph (LGC). Drs. Mogul and Limaye realized that, as the probe descended through the thicker parts of the atmosphere, the inlets for these instruments, which were designed to measure atmospheric gases, became clogged with aerosolized particles from the clouds. For evidence of this clog, they point to a massive, but temporary, drop in the CO2 levels in the atmosphere as the probe descended through the cloud layers.
Instead chalking this up as an instrument failure, they looked at the data as a way of analyzing the types of aerosols that were trapped in the inlet - and they did so by looking at their burn-off temperatures. As the probe continued to descend through the atmosphere, it melted the various aerosols at different temperatures (and allowed the inlet to flow freely again, which caused the CO2 reading to spike back up). Analyzing what gases were released at the temperatures those aerosols melted would help them understand what the aerosols, and hence the clouds themselves, were made up of.
Life on Venus might not even require water, as Fraser discusses in this video.
The first thing they noticed were massive spikes in water at 185𝇈C and 414𝇈C, which were indicative of hydrates such as hydrated ferric sulfate and hydrated magnesium sulfate. They also noticed that water made up the bulk of the aerosols at 62%, though almost all of it was bound up in these hydrates.
As expected, sulfuric acid was also present in the aerosols. It showed up in a major release as SO2 around 215𝇈C, which is the temperature sulfuric acid decomposes. Interestingly there was also another release of SO2 around 397𝇈C, which indicated there was another, more thermally stable sulfate compound in the aerosols as well.
A hint at what that compound might be came from a spike in another, though unexpected, chemical signature - iron. At the same temperature as the second SO2 spike, the LNMS detected a spike in iron ions. Combined with the release of SO2 at that temperature, there’s a strong indication that one of the aerosols is ferric sulfate, which decomposes to iron oxide and sulfur oxides around those temperatures. Estimates put the ferric sulfate content of the aerosols as high as 16%, almost matching the 22% estimated for the sulfuric acid that was thought to dominate the clouds banks until this paper.
Fraser discusses the future of Venus exploration.
So where did the iron come from? The authors believe it comes from cosmic dust that is pulled into Venus’ atmosphere and then reacts with the acid cloud bank. But ultimately the biggest finding from this new analysis is the significant presence of water. It also solves a mystery as to why there was a discrepancy between probes that collected data from the actual clouds compared to those that simply remotely scanned Venus’ cloud layer with spectroscopy equipment in terms of the water content of the clouds. The remote sensing devices wouldn’t be able to detect the water bound up in hydrates - only the amount of atmospheric vapor, making the descent probes much more accurate in their calculation of total water content.
All this new understanding obviously has big implications for the search for life in Venus’ clouds, as one of the main arguments against that possibility was the scarcity of water in that environment. It turns out that water is much more abundant than previously thought - though admittedly it’s rather acidic for the taste of most Earth-bound microbes.
This new understanding shows how useful even old data can be, and how it can effectively contribute to even modern discussions of unanswered scientific questions. The problem might just be finding it buried somewhere in NASA’s archives - which can be a scientific feat in itself.
Now I have found a lot of strange things over the years, so none of these will come as any big surprise. However I found a face that is 100% proof of this alien race existing...and they look just like us. Nasa puts these photos into black and white on purpose because the human eye is not use to being limited to only two colors. However if you look at it a few moments, take your time...and you will see what I see.
The celestial show of interstellar comet 3I/ATLAS is preparing to take a break. The space traveler, who came to us from the depths of the Milky Way, will soon temporarily disappear from the view of observers on Earth. The reason lies in orbital motion: our planet and the comet will soon be on opposite sides of the Sun. The bright light of the star will completely obscure the faint glow of the comet, making it impossible to observe.
Illustration of comet 3I/ATLAS approaching its perihelion. Author: Copilot AI
The comet is now only a few degrees from the Sun in the sky, setting about an hour after dusk. This creates a narrow window of opportunity for its detection. However, only those with powerful telescopes will be able to see it.
3I/ATLAS now looks like a faint spot located approximately at the distance of Mars’ orbit. Soon, the angular distance between it and the Sun will begin to decrease rapidly, and by the end of October, they will converge at their minimum distance.
Non-standard trajectory
Position of comet 3I/ATLAS as of the end of September 2025
Despite this proximity, Comet 3I/ATLAS will not approach the Sun in the same way as ordinary comets do. The point of its perihelion, its closest approach to the star, will be reached on October 29. At that moment, it will be a full 202 million km away from the Sun. This distance means that Earth will miss the most interesting phase of the comet’s activation, when solar heat would intensively evaporate ice from its core, forming a bright tail.
Unique space visitor
This comet differs sharply from the two previous interstellar visitors – 1I/Oumuamua and 2I/Borisov. It moves almost twice as fast and is much larger. Its origin is also different: most likely, the interstellar visitor arrived from the “thick disk” of our galaxy, rather than from the region where the Solar System is located.
The 3I/ATLAS study is key to understanding the nature of interstellar objects and the structure of other planetary systems. Even its recent change to green has sparked keen interest among scientists.
Back to the skies
Fortunately, this is not the last appearance of the mysterious guest. Scientists predict that the comet will once again be visible from late November, just before its closest approach to Earth. The minimum distance to our planet will be 268 million km. Although it is not a close encounter, astronomers are already preparing their instruments to obtain valuable new data about this unique interstellar traveler.
A mysterious space signal that has never been explained may have come from an equally mysterious object racing through our solar system.
Harvard astrophysicist Avi Loeb, who has continued to theorize that the object known as 3I/ATLAS could be an alien craft, has said the famous 'WOW! signal' may have come from this fast-moving visitor.
3I/ATLAS was first detected by astronomers this summer and is now only days away from making a close pass by Mars.
Loeb has noted several irregularities in the supposed comet that suggest it could be something that's artificially constructed with a mysterious mission that takes it past three planets in the solar system.
Now, Loeb has drawn a connection between 3I/ATLAS and this unexplained space signal received in 1977.
The WOW! signal was captured by the Ohio State University's Big Ear radio telescope for 72 seconds, in a burst so unusual that it prompted astronomer Jerry Ehman to write 'WOW!' on the telescope's readout.
Loeb's new analysis has found that on August 12, 1977, just a few days before the WOW! signal was detected, 3I/ATLAS was in a part of the sky very close to where the signal came from.
The chances of two random points in the sky being this close are only about 0.6 percent, which makes this potential connection even more compelling.
3I/ATLAS (pictured) is the third interstellar object discovered by astronomers as it passes through our solar system
The 'WOW! signal' was received on Earth back in 1977 and scientists have not been able to explain what produced it
If the signal did come from 3I/ATLAS, Loeb explained that it would have needed a transmitter as powerful as a nuclear power plant on Earth to send it from that distance.
Although astronomers have not found any proof of artificial technology on the surface of the object nearing Earth, Loeb has previously theorized that 3I/ATLAS could be a nuclear-powered vessel.
His claims were based on 3I/ATLAS appearing to generate its own light in a photo by the Hubble Telescope in August.
'3I/ATLAS could be a spacecraft powered by nuclear energy, and the dust emitted from its frontal surface might be from dirt that accumulated on its surface during its interstellar travel,' Loeb wrote in a statement.
Since then, scientists have widely dismissed the alien spacecraft theory, concluding that the interstellar object is a strange comet that's composed of a completely different chemical makeup than most comets created in our solar system.
So far, no one has checked if 3I/ATLAS has been sending out radio signals, but Loeb hopes this coincidence will encourage scientists to take a closer look.
This year, Earth spacecraft near Mars and Jupiter will get a chance to observe 3I/ATLAS as it passes by, which could give us more clues.
NASA has just unveiled a new tracking system for 3I/ATLAS, which allows anyone to zoom in and look at the object up close. According to NASA's simulation, it's a giant space rock with a white tail that will make it's closest pass by Mars on October 3.
3I/ATLAS will make a close pass by Mars on October 3 and NASA has just unveiled a new tracking tool for the public
As for the WOW! signal, it exhibited several intriguing characteristics, including a narrow bandwidth, high signal strength, and a frequency close to the natural radio emissions produced by neutral hydrogen - an element abundant in the universe.
These properties have led many to speculate the signal could have come from an alien origin, possibly sent by an extraterrestrial intelligence.
Looking at its possible connection to 3I/ATLAS, the signal showed a slight shift in frequency, which could match the speed of the comet moving toward the sun, though it's not a perfect match.
'In case we detect an artificial signal from an interstellar object, how should we engage with it?' Loeb asked in his latest paper on the interstellar object.
However, the Harvard professor said the answer is more complicated than some might think, warning that an alien intelligence could pose a threat to the human race.
'We must consider the possibility of a black swan event from interstellar objects resembling a comet at large distances, but potentially carrying devastating consequences to our future like a Trojan Horse,' Loeb warned.
NASA whistleblowers have come out with a dire warning, predicting that an astronaut will likely die in a tragic accident due to shocking changes at the space agency.
In a 21-page report released by the USSenate Committee on Commerce, Science, and Transportation, NASA employees claimed leadership has been keeping plans secret, with no written records, and shutting down open communication.
Whistleblowers believed future astronauts were at risk because of significant budget cuts proposed by the Trump Administration and an alleged culture of fear that's stopping workers from reporting safety problems.
One person who spoke to the committee warned that this could lead to an astronaut death soon due to ignored safety issues on upcoming space flights.
The committee specifically point the blame at the Trump White House and the Office of Management and Budget (OMB), led by Director Russell Vought, for these safety risks, accusing them of illegally forcing unapproved budget cuts on NASA this year.
The budget cuts included a proposed rollback from $24.8 billion to $18.8 billion for NASA's 2026 budget, a 24 percent overall slashing.
That May proposal focused on a 33 percent cut to science projects, a 47 percent reduction in NASA projects, and laying off 32 percent of the agency's workforce.
'No one is coming to save us,' a whistleblower said in the report.
NASA recently revealed 10 new astronauts who will make up its first new recruits since 2021, including some who may be the first people to set foot on Mars
Under the Trump Administration's budget cuts, nearly every area of NASA would see reductions, including a nearly 50 percent cut to major science programs (Stock Image)
The NASA staffers told the committee leadership, including Chief of Staff Brian Hughes, ordered them to only follow the unapproved 2026 budget (PBR) and that 'if it's not in the PBR, it does not count.'
This prompted them to come forward because they saw the policy changes as breaking NASA's rules and endangering its mission.
The whistleblowers added they spoke out to protect NASA's future, expressing heartbreak over losing young talent and fearing that without action, the agency's safety and innovation could collapse.
Another NASA employee said they were, 'very concerned that we're going to see an astronaut death within a few years.'
The committee added that the US Constitution is clear in this situation, declaring that the executive branch is not allowed to unilaterally impose a president's proposed budget without the approval of Congress.
'NASA's legal office should know better,' a whistleblower said.
Those that have come forward added that NASA employees are generally 'keeping their heads down' out of fear of retaliation for raising safety concerns.
Former NASA chief Bill Nelson told the Daily Mail that by cutting efforts to return to the moon and to pursue Mars missions undermines NASA's future (Stock Image)
During a recent NASA press conference, which announced the discovery of microbial life on Mars, new NASA Administrator Sean Duffy was pressed on the impact of the $6 billion budget cut to the agency.
Speaking specifically about how the proposed budget would cancel a sample retrieval mission to Mars, Duffy said NASA was looking at their budgets and finding faster and more cost-effective ways of completing space missions.
Despite the cuts, Duffy declared that the US would launch the Artemis II mission, which will orbit the moon, in less than two years.
He added that the Artemis III astronaut mission would then 'land and establish a long-term presence of life on the moon led by America.'
This month, former NASA chief Bill Nelson voiced his opposition to the cuts, fearing that future missions to Mars involving robots like the Perseverance rover were now in jeopardy.
'A lot of things I deeply care about and worked hard on are getting cut,' lamented Nelson, the former Democratic senator who flew aboard the space shuttle and served as NASA's 14th administrator.
However, the White House has dismissed the criticism and maintained that NASA has been 'grossly over budget,' arguing the same goals could be met through future manned Mars missions instead.
Als er een ruimtewedloop is, lijkt China deze al te winnen: NASA’s Mars-monsters en de race om Mars-monsters terug naar de Aarde
Als er een ruimtewedloop is, lijkt China deze al te winnen: NASA’s Mars-monsters en de race om Mars-monsters terug naar de Aarde
Een illustratie van NASA's Perseverance-rover naast een voorraad verzegelde Marsmonstervoorzieningen. De rover heeft 30 geologische monsters op Mars verzameld, maar NASA's geplande missie om ze op te halen is vertraagd.
(Beeldkrediet: NASA/JPL-Caltech)
Inleiding
Er wordt momenteel veel gesproken over een mogelijke ruimtewedloop tegen Mars. Een opvallende opmerking luidt: als er al een race is, dan lijkt China deze al te winnen, en NASA zal waarschijnlijk geen Mars-monsters (monsters) eerder terughalen naar de Aarde dan China. Experts wijzen erop dat traditionele tijdlijnen en technologische mijlpalen steeds vaker onder druk komen te staan door geopolitieke belangen, technologische doorbraken en de enorme complexiteit van een Mars Sample Return-missie. Dit artikel verkent de context, de stand van zaken en wat dit betekent voor de toekomst van de verkenning van de Rode Planeet.
1. Achtergrond
Waarom Mars-samples terug naar de Aarde zo aantrekkelijk zijn Het verzamelen en terugbrengen van Mars-monsters naar de Aarde is een unieke kans om een schat aan wetenschappelijke informatie direct te analyseren met de precisie en instrumentatie die op Aarde ontbreekt op een ruimtevaartuig. Terwijl robots op Mars rovers en landers laten zien wat mogelijk is, biedt een wetenschappelijk laboratorium op Aarde de mogelijkheid tot diepgravende analyses op moleculair, isotopisch en biogeochemisch niveau. De belofte is simpel maar enorm: om graffiti-achtige tekens van vroeg leven, geologische processen en de geschiedenis van de planeet beter te begrijpen dan ooit tevoren.
Toch is een Mars Sample Return (MSR) missie een van de meest ambitieuze en risicovolle ondernemingen in de ruimtevaart. Het vereist coördinatie over meerdere ruimtemissies, strikte contaminatiecontrole, veiligheid op aarde en een dure investeringslijn die decennia kan overspannen. Die combinatie van technologische complexiteit en operationele verwikkelingen legt een hoge lat voor tijdlijnen en budgetten. Daarom zien experts MSR als een langetermijninspanning, waarbij elke stap een leerproces is.
Een "selfie" van China's Zhurong-rover en het Tianwen-1 landingsplatform op Mars in 2021.
Bron: China National Space Administration
2. NASA, MSR en de haalbaarheid op kortere termijn
Sinds het begin van de jaren 2000 heeft NASA MSR-ambities gekoesterd, maar de uitvoering is niet lineair verlopen. De huidige visie draait om een combinatie van een Mars-orbitalsessie, een lander en een sample-return missie die terugkeer naar de Aarde mogelijk maakt. De planning is ver verwijderd van een eenvoudige “lima” met een enkele vlucht. Er zijn cruciale technologische knelpunten, zoals het veilig ophalen van Marsboden met mondiaal contaminants en het betrouwbaar afleveren van monsters in een speciaal container op aarde, waar streng toezicht en controle op aanwezigheids- en opslagsystemen nodig zijn.
Daarnaast spelen budgettaire realiteiten en prioriteitsafwegingen in NASA’s bredere programma een grote rol. MSR vereist partnership en cofinanciering met andere ruimtevaartorganisaties en industriepartners. In het recente verleden zijn er stappen gezet zoals pre-voorbereidende studies, concept-ontwikkeling en demonstratie-activiteiten die de haalbaarheid vergroten, maar een concrete startdatum blijft onzeker. Daardoor ontstaat bij critici het beeld dat NASA mogelijk de tijd vooruit maakt op sommige vlakken, maar de totale terugkeer van Mars-monsters naar de Aarde een lange, complexe en gedeeltelijk onvoorspelbare onderneming blijft.
China heeft actief hun plannen voor aankomende ruimtemissies gedeeld, waaronder de asteroïdemissie, de Mars-monsterrterugbrengmissie en de missie naar Jupiter. Samen met hun ambitieuze robotische missies kondigde de CNSA in 2021 aan dat ze van plan zijn hun eerste bemande missie naar Mars te sturen in 2033, met als doel regelmatige missies naar Mars te sturen en uiteindelijk daar een basis te bouwen. China heeft ook hun Tiangong-ruimtestation, dat momenteel drie astronauten huisvest voor verblijven van zes maanden.
3. China’s ruimteprogramma
Op weg naar Mars-monsters terug naar huis China heeft de afgelopen jaren aangekondigd en vervolgens laten zien dat het mee wil doen aan het meest ambitieuze deel van de planetoid-wereld: een Mars-sample return. Het land heeft al een succesvol ruimtemissiesucces gevierd met de Tianwen-1 missie: een orbiter, een lander en een rover die gezamenlijk de Rode Planeet heeft onderzocht. De volgende stap, zo suggereren officiële aankondigingen en openbare plannen, is het ophalen van Mars-monsters en het terugbrengen naar de Aarde.
China’s aanpak wordt vaak geprezen om zijn gelikte randvoorwaarden: duidelijke doelstellingen, agressieve tijdlijnen en een cultuur van strakke uitvoering. De betrokkenheid van een robuuste ruimtevaartindustrie, een intensief test- en validatieprogramma en een streven naar geopolitieke invloed op het gebied van ruimteonderzoek, dragen eraan bij dat China’s plannen serieus worden genomen. Experts wijzen erop dat China niet alleen investeert in individuele missies, maar ook in de infrastructuur die nodig is om zulke missies te ondersteunen: grondstations in verschillende delen van de wereld, geavanceerde grondcontrole, en een rijp beleid voor ruimtevaartveiligheid en -beveiliging.
NASA-programmawetenschapper Lindsay Hays legt uit wat mogelijke tekenen van oud leven op andere werelden definieert en waarom deze nader onderzoek vereisen. De Perseverance-rover van NASA op Mars zoekt naar deze tekenen, verzamelt monsters voor toekomstige terugkeer naar de aarde en helpt de weg te effenen voor menselijke verkenning.
Bron: NASA/JPL-Caltech What is a Potential Biosignature?
4. Waarom de tijdlijnen zo anders uitpakken dan men zou verwachten
Technische complexiteit: Het terughalen van Mars-monsters vereist meerdere stappen: verregaande landers, sample caches op de maan of in een tweede voertuig, en een terugkeer-progamma dat monsters veilig naar de Aarde brengt en vervolgens in een controleert gecontroleerde bioveiligheidsomgeving onderzoekt. Elk van deze stappen heeft unieke ontwerpuitdagingen en testvereisten.
Contaminatiedeals en ruimtebodemhygiëne: Een van de grootste zorgen is het voorkomen van biologische of chemische verontreiniging, zowel van Mars naar Aarde als omgekeerd, wanneer monsters worden aangeraakt en geanalyseerd. De regelgeving en procedures voor biosafety zijn streng en vereisen uitgebreide validatie.
Politieke en financiële factoren:MSR-projecten financieren zich niet vanzelf. Veranderingen in politieke prioriteiten, economische omstandigheden en internationale samenwerking kunnen tijdlijnen flink beïnvloeden. De huidige geopolitieke context, gekenmerkt door belangrijke concurrentie in de ruimte, heeft de kosten en de politieke bereidheid om samen te werken kunnen beïnvloeden
Innovatie- en supply-keten uitdagingen: De benodigde systemen en onderdelen (zoals speciale weerbestendige containers en strikte contaminatiewaardesystemen) moeten wereldwijd worden ontwikkeld en geproduceerd, hetgeen logistieke vertragingen oplevert. Elk missertje in de supply chain kan de hele klok vertroebelen.
Na meerdere jaren en meerdere beoordelingen van het gezamenlijke NASA/Europese Ruimtevaartorganisatie MSR-project was er een schrikbarend prijskaartje. Vroege conceptuele kunstwerken tonen een door de VS geleid initiatief.
(Afbeelding tegoed: NASA/JPL/Caltech)
5. Geopolitieke realiteiten
De ruimte als theater van invloed De opkomst van een ruimtewedloop vol geopolitieke concurrentie heeft de dynamiek van missies veranderd. Voor sommige analisten is China al dichter bij de finishlijn dan NASA, omdat China sneller in staat blijkt te schakelen tussen planning, technologische ontwikkeling en uitvoering. Anderen merken op dat NASA, ondanks de doorbraaktempo en het succes van NASA’s Mars- en Artemis-programma’s, met zijn eigen stevige partnernetwerk en multinationale samenwerking, in staat zal zijn om MSR-ambities te realiseren, zij het mogelijk op een iets langere tijdschaal.
Toch blijft de onderstroom duidelijk: wie als eerste Mars-monsters op aarde kan ontvangen, zal niet alleen een wetenschappelijke prestatie leveren, maar ook een symbolische overwinning die de perceptie van leiderschap in de ruimtevaart bepaalt. In informele bewoordingen wordt er gezegd dat “als er een ruimtewedloop is, China deze al gewonnen heeft”—niet dat NASA geen significante wetenschappelijke vooruitgang boekt, maar dat de tijdlijn en de haalbaarheid van MSR er anders uitzien dan men in de vroege jaren 2000 had verwacht.
Waar te verzamelen, wat te verzamelen, hoe te verzamelen en hoe te analyseren wat wordt gevonden, wordt actief bestudeerd door functionarissen van het Chinese ruimtevaartprogramma.
(Beeldcredit: De Universiteit van Hong Kong)
China's routekaart voor een Marsmonstermissie die in 2028 gelanceerd zal worden.
(Beeldcredit: The University of Hong Kong/Zengqian Hou, et al.)
6. Wat betekent dit voor de wetenschap en de publieke perceptie?
Wetenschappelijke implicaties
Een succesvolle terugkeer van Mars-monsters zal de wetenschappelijke gemeenschap in staat stellen om analyses uit te voeren met hulp van state-of-the-art laboratoria op aarde. Dit kan leiden tot nieuwe inzichten in de geologie, de ontwikkeling van Mars en mogelijk signalen van vroeg leven of prebiotische chemische processen. De vooruitgang in analyse-technieken en de interoperabiliteit van internationale partners kunnen de kwaliteit en snelheid van wetenschappelijk begrip aanzienlijk verhogen.
Publieke perceptie en inspanning
Een duidelijke publieke boodschap over wie wanneer Mars-monsters terugbrengt, kan de publieke interesse in ruimtevaart versterken of juist tot discussies leiden over prioriteiten en uitgaven. Belangrijke ruimte-evenementen en persmomenten kunnen dienen als katalysator voor bredere belangstelling en educatieve projecten.
Beleidskaders en internationale samenwerking
De gespannen maar noodzakelijke dialoog tussen ruimtevaart agentschappen wereldwijd, met inbegrip van regels rondom veilige terugkeer, data sharing en aansprakelijkheid, zal cruciaal blijven. Internationale samenwerking kan missies haalbaarder maken, maar vereist ook duidelijke afspraken over eigendomsrechten van monsters, data en de verdeling van wetenschappelijke voordelen.
7.Conclusie:
Wat de toekomst ons leert Of China nu daadwerkelijk als eerste Mars-monsters naar de Aarde zal brengen, of NASA uiteindelijk de eerste officiële terugkeer zal realiseren, is voor het moment minder belangrijk dan wat deze race leert over de toekomst van ruimteverkenning. Het gaat niet alleen om de eindbestemming, maar om de weg ernaartoe: de technologische innovatie, de samenwerking tussen landen en sectoren, en de maatschappelijke dialogen over de waarde van onderzoek en ontdekking.
De uitspraak dat China mogelijk vooroploopt in de ruimtewedloop straalt een pragmatisme uit: de realiteit is dat zowel de technologische doorbraken als de geopolitieke omstandigheden voortdurend veranderen. In die zin is er geen eenvoudige winnaar in een dergelijke complexe onderneming. Wat wel vaststaat, is dat Mars-exploratie niet langer een eenvoudig “sciencefiction”-verhaal is. Het is nu een internationaal en multidisciplinair project waar elke morgen een stap dichter bij de Aarde mogelijk wordt gemaakt—en waarin de wereld toekijkt hoe twee grootmachten, en mogelijk anderen, de grenzen van wat mogelijk is opnieuw verleggen.
Eind noot
Het debat over wie Mars-monsters als eerste terugbrengt naar de Aarde, blijft een boeiend onderwerp voor ruimtefanaten, wetenschappers en beleidsmakers. Terwijl mengformuleringen over de ruimtewedloop bestaan, blijft één ding duidelijk: de technologische ontwikkeling, de internationale samenwerking en de publieke belangstelling voor Mars zullen in de komende decennia centraal staan. Of China nu wint in de perceptie, de realiteit blijft dat Mars-verkenning een collectieve menselijke onderneming is—een onderneming waarin elke stap, elke innovatie en elke samenwerking bijdraagt aan ons begrip van de Rode Planeet en ons eigen plek in het universum.
View of Magellan radar data of the surface of Venus, revealing a surface shaped by geological activity (Credit : NASA/JPL)
Venus is often called Earth's "sister planet" because of their similarities in size, mass, and composition. Both are rocky worlds that formed around the same time in the inner Solar System however, despite these similarities, Venus evolved into a world vastly different from Earth, with surface temperatures around 465°C, crushing atmospheric pressure 90 times greater than Earth’s and thick clouds containing sulphuric acid circling the planet. These dramatic differences between two such similar planets make Venus a fascinating subject for planetary scientists to study.
First view of Venus's surface. The first clear panoramic image taken by Venera 9 lander. This image was sent back in the lander's 53-minute lifetime 22 October 1975
(Credit : Ted Stryk)
Beyond their similar dimensions, Venus and Earth share another similarity, both planets are geologically active and have been shaped by volcanism. Venus's surface is dominated by vast volcanic plains, enormous shield volcanoes and vast lava flows. Like Earth, Venus has been resurfaced by molten rock erupting from its interior, creating landscapes that bear striking resemblances to volcanic regions on our own planet. Understanding these volcanic features, including the underground structures they create, offers a window into the geological processes that have shaped both worlds and provides clues about why they took such different evolutionary paths.
An international team led by Barbara De Toffoli from the University of Padova have been studying radar images and topographic data from earlier Venus missions. They focused their attention on the planet's large shield volcanoes, those exceeding 100 kilometres in diameter to search for signs of collapsed lava tubes. These features are natural tunnels that form when the surface of a lava flow cools and solidifies while hot lava continues to flow underneath. Once the lava drains away, it leaves behind a hollow tube. They identified four clear curving chains of pits that appear to mark where sections of underground tubes have collapsed.
These tubes have been found on the Moon and Earth, but until now, their existence on Venus remained purely theoretical. Their existence on Venus, or any planet for that matter, provides valuable insights into the volcanic history and perhaps excitingly, may even serve as a shelter for future human exploration missions. This may sound somewhat fanciful but their subsurface nature would offer protection from the hostile environment of the surface.
Thurston Lava Tube in Hawaii Volcanoes National Park, Hawaii. The step mark, more visible on the right wall, indicates the depth at which the lava flowed for a period of time
(Credit : Frank Schulenburg)
Unlike straight pit chains caused by tectonic forces pulling the crust apart, these formations curve and wind across the surface, following the natural downhill flow of ancient lava. The team were convinced the pit discovery is not related to tectonic activity due largely to their sinuous nature but also their dimensions since tectonic pits present as different sizes. The team identified four instances of these pits and interestingly they all exist on the flanks of volcanoes covered with extensive lava flows. This is exactly where you would expect to find lava tubes. The pits are also aligned in a down hill orientation making this consistent with lava flowing downhill.
This discovery significantly advances our understanding of how Venus has evolved geologically. The planet's extreme surface conditions make it notoriously difficult to study. Lava tubes offer a window into Venus's volcanic past and could help us to refine models of the planet's thermal and tectonic evolution. I have to confess though, as a not-so-closet geek, I’m quite taken by the concept of these extensive subterranean tunnels being used by future human explorers. With upcoming missions like the ESA EnVision mission to Venus which has a Subsurface Radar Sounder we will get to reveal the true extent of these tubes and perhaps take us a tiny step closer to human exploration.
Launched in 2009, theKepler Space Telescope revolutionized astronomy by discovering thousands of exoplanets in over 150,000 star systems. Kepler was specifically designed to detect Earth-sized planets by monitoring stars for periodic dips in brightness, which may result from planets passing in front of their star relative to the observer. Known as the Transit Method (or Transit Photometry), this technique has allowed astronomers to identify the majority of the more than 6,000 exoplanets in the current census. However, the method is not perfect and produces some false positives (initially as high as 5%–10%), which can sometimes be caused by other celestial objects.
According to new research by a team of astronomers from the Chinese Academy of Sciences (CAS), this was the case with KOI-1755, a star located 982 light-years from Earth that periodically dims. As they indicated in their study, recently published in The Astrophysical Journal, the transit signal was a false positive caused by an eclipsing binary. The research team was led by Ph.D. candidate Wang Haozhi under the supervision of Prof. Ali Esamdin at the CAS's Xinjiang Astronomical Observatory (XAO).
Kepler first detected a transit-like event from KOI-1755 in 2014 and again in 2021, both of which corresponded to a period of about 25 days. On the second occasion, the signal was interpreted as a possible indication of a planet with 5.9 Earth radii (or 0.5 Jupiter radii), making it comparable in size to a Neptune-sized gas giant. Despite this periodic dimming, the true source of the signals has remained a mystery. To determine the true source of the dimming, the CAS team analyzed data from Kepler's Target Pixel Files (TPFs).
They subjected this data to pixel-level flux modeling. centroid shift measurements, and cross-matching with the Gaia mission's third data release (DR3). This modeling strategy significantly improved the quality of the Kepler light curves, and the DR3 data allowed them to avoid contamination from nearby stars. This allowed the team to isolate the uncontaminated light curve from the background star, confirming that it was caused by an eclipsing binary.
In short, their analysis revealed that the system is not a single star, but instead composed of two dwarf stars with an orbital period of about 6.14 days. In addition to eclipses, their analysis showed the binary system exhibits periodic modulations caused by starspots and differential rotation. This study not only clarified the true source of KOI-1755's signals but also demonstrated the effectiveness of the pixel-level photometric modeling method developed by Wang and his colleagues. It also demonstrates that there could still be an invaluable amount of information on stellar dynamics embedded in Kepler and K2 mission data.
The method could also be very promising for investigating other transit-like signals in the Kepler archives and other missions that rely on the Transit Method to detect exoplanets, such as the Transiting Exoplanet Survey Satellite (TESS), and demonstrates how retired missions can experience a second life through improved analysis techniques.
Supermassive Black Hole or Galactic Consciousness?
Supermassive Black Hole or Galactic Consciousness?
Imagine looking up at the night sky and wondering not only what lies inside galaxies, but also what a galaxy itself might be thinking. The term “supermassive black hole” (SMBH) is a well-established part of modern astronomy. The idea of “galactic consciousness,” by contrast, is more philosophical and speculative. It asks whether a galaxy could possess awareness, goals, or a form of mind. Both topics invite big questions about scale, gravity, information, and what it means to know something. Here, we’ll explore what these terms mean, how scientists study them, and what the differences are between a real, physical object and a thought about collective, galaxy-scale behavior.
An Einstein ring around the galaxy LRG 3-757, at the center of which the heaviest black hole was discovered.
Photo: NASA
A color image of the Cosmic Horseshoe created using filters F814W, F606W and F475W. The system consists of the Einstein ring of the Cosmic Horseshoe, as well as a radial arc and its opposite image.
The insert shows a radial arc. Source: NASA
First, what is a supermassive black hole? A black hole is a region of space where gravity is so intense that nothing, not even light, can escape from it. The boundary around this region is called the event horizon. Supermassive black holes are, as the name implies, enormous. They typically contain millions to billions of solar masses and sit at the centers of most large galaxies, including our Milky Way. The evidence for their existence is indirect but strong. We observe stars and gas moving at high speeds near the centers of galaxies. We detect powerful emissions in X-ray light and radio waves from material that is heated to extreme temperatures as it spirals inward, a process known as accretion. When matter falls toward a black hole, it forms an accretion disk that glows brilliantly, especially in X-rays, before it disappears behind the event horizon. In many galaxies, the behavior of stars and gas in the inner regions suggests the gravitational pull of something incredibly dense and compact, consistent with a black hole. In other cases, we see jets of particles blasting out at nearly the speed of light, launched by magnetic fields twisted around the spinning black hole. The consensus among astronomers is strong: many, if not most, large galaxies host a supermassive black hole at their center, often feeding on surrounding material.
Why are SMBHs so important? They act as engines that regulate the growth of their host galaxies. There is a remarkable relationship between the mass of a galaxy’s central black hole and the properties of the galaxy’s bulge, such as its mass and brightness. This correlation, called the M-sigma relation, suggests a co-evolution: as the black hole grows by pulling in matter, the energy it releases can heat or push away gas, influencing future star formation. In other words, SMBHs do not merely sit in the middle; they can shape the fate of their entire galactic neighborhoods. This connection between tiny scales (the event horizon and accretion physics) and vast scales (galaxy evolution) makes SMBHs a focal point in astrophysics.
Now, what about galactic consciousness? The phrase asks whether a galaxy could be conscious in some sense—aware, purposeful, or able to experience something. The idea has historical and speculative roots in panpsychism and in metaphorical descriptions of cosmic order. Some thinkers ask whether galaxies, as complex systems with many interacting parts, could exhibit collective behavior akin to a mind. A galaxy is made of stars, gas, dark matter, magnetic fields, and dark energy. These components follow the laws of physics and interact in complex ways that can produce patterns, rhythms, and even evolutions that look organized. But consciousness, as scientists typically define it, involves subjective experience, feelings, and a first-person point of view. So far, there is no evidence that galaxies possess subjective experience. There is also no widely accepted framework in physics that would treat a galaxy as a conscious agent with beliefs or desires. The claim remains more poetic or metaphorical than empirical.
A useful way to compare the two ideas is to distinguish what is observable and what is interpretive. A supermassive black hole has clear, testable signatures: the motion of stars near the center, X-ray emission from hot gas, and sometimes relativistic jets. These are physical, measurable phenomena governed by gravity and quantum physics combined with relativity. Galactic consciousness, if it exists, would be hard to test directly. What would count as evidence? Some might argue that a galaxy’s large-scale organization and behavior could be interpreted as “aimed” at sustaining star formation, maintaining stability, or preserving structure. But such interpretations risk anthropomorphism. Complex systems can appear to have goals simply because many parts respond to common pressures and constraints. The difference between “the galaxy acts to preserve itself” and “the galaxy has an intention to preserve itself” is subtle but crucial. In science, correlation and pattern do not automatically imply consciousness.
Another angle is to consider scale and energy. SMBHs are extreme sinks of mass-energy and powerful sources of energy; their gravity warps spacetime and their accretion disks heat up to temperatures rivaling the cores of stars. The physics is explicit, even if some details remain mysterious. Galactic consciousness, by contrast, would be an emergent property, if it exists at all, arising from the collective behavior of a massive network of components. Emergent phenomena are common in nature: water’s wetness, the flocking of birds, and the emergence of nervous-system activity from neurons. Some philosophers and scientists like to discuss whether there could be a form of “galactic ethics” or “galactic purpose,” but these ideas are philosophical tools rather than testsable predictions.
What would be the practical implications if galaxies were conscious? If we could demonstrate some form of awareness in a galaxy, it would challenge how we understand intelligence, life, and agency across the universe. It might imply that mind is not limited to biological organisms but can arise in complex systems with certain kinds of organization. On the other hand, there is also a risk of conflating metaphor with mechanism. Speaking about a galaxy “deciding” to endure or “seeking” stability is a useful narrative for teaching or thinking, but it might obscure the actual physics driving observed patterns.
Currently, the evidence points strongly toward SMBHs as real, well-understood physical objects with measurable effects on their surroundings. The case for galactic consciousness, by contrast, remains speculative and largely rhetorical. Scientists can and do study galaxies as physical systems: how stars form within them, how dark matter shapes their halos, how gas cools and collapses to form new generations of stars, and how feedback from black holes and supernovae regulates these processes. These are measurable questions about structure, dynamics, and evolution. The idea of a mind behind the galaxy is not a testable scientific hypothesis in the same sense.
That doesn’t mean the two topics are unrelated. They invite complementary perspectives on scale, causation, and the mystery of the universe. The existence of SMBHs demonstrates how gravity and quantum physics combine to produce extreme environments. The possibility of galactic consciousness invites humility: the universe may harbor forms of organization and complexity that we have not fully understood, and our intuition about life and mind may be too limited to grasp the grandest scales. In science, bold questions often begin with bold metaphors. The critical step is to translate a metaphor into testable ideas, or to acknowledge when an idea is best kept as a thought experiment.
For students and curious readers, a practical takeaway is to separate what we know from what we wonder. We know that SMBHs exist, we know they affect their galaxies, and we can observe many of their signatures with telescopes across the electromagnetic spectrum. We also know that galaxies, as massive collections of matter interacting through gravity, can produce complex and beautiful structures. Wondering whether they possess consciousness can inspire imaginative reflection, innovative hypotheses, and careful philosophical debate. It can also remind us to distinguish observational science from speculative speculation.
In teaching and outreach, it can be helpful to present both sides clearly. When explaining SMBHs, one might describe the event horizon, the accretion disk, the gravitational influence on nearby stars, and the evidence from observations like stellar motions near the galactic center and X-ray emissions. When broaching galactic consciousness, one could present the idea as a philosophical possibility, highlight why it is appealing to some, and then explain the scientific challenges: the lack of verifiable criteria, the problem of subjective experience, and the risk of anthropomorphism.
As technology advances, our ability to observe galactic centers and the broader structure of galaxies will improve. Instruments like more powerful telescopes, interferometers, and detectors across different wavelengths will refine our understanding of SMBHs and their interactions with their hosts. If ever new data suggested unusual, non-physical explanations for galactic behavior, scientists would scrutinize them with the same rigor they apply to any extraordinary claim. Until then, the most robust scientific narrative describes galaxies as ecosystems influenced by gravity, gas dynamics, star formation, and the energy from central black holes—beautiful, intricate, and governed by the laws of physics.
In conclusion, a supermassive black hole is a concrete, well-supported feature of many galaxies, including the Milky Way. It has measurable effects, testable predictions, and a central role in theories of galaxy formation and evolution. Galactic consciousness, by contrast, remains a provocative idea at the intersection of philosophy and speculative science. It prompts us to ask about the nature of mind, the limits of anthropomorphism, and the possible forms that life and intelligence could take in the universe. For now, the science keeps its feet on the ground: SMBHs are real and influential, while galaxy-scale consciousness is an intriguing possibility—one that invites thoughtful imagination but requires far more evidence before it could be considered part of our scientific understanding. The universe continues to be a place of extraordinary phenomena, from the shadowy depths of event horizons to the grand, emergent patterns of galaxies that light up the cosmos.
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