Story by Cassian Holt

 

Scientists spot a massive object quietly shadowing Earth’s orbit

Far from the bright glare of the Moon, a much smaller companion has been quietly keeping pace with Earth, looping around the Sun in a complex dance that only looks like a shared orbit from our vantage point. Astronomers now recognize this object, designated 2025 PN7, as a quasi-moon, a tiny asteroid that appears to shadow our planet without being truly captured by its gravity. The discovery turns a routine scan of the sky into a reminder that even in our own celestial backyard, there are still neighbors we are only just meeting.

Despite the headline-friendly idea of a “massive” new world, the reality is more subtle and scientifically richer: 2025 PN7 is physically small but dynamically significant, a compact body whose path reveals how Earth interacts with the swarm of rocks that share its orbital neighborhood. In practical terms, this is a miniature object with outsized importance for understanding near-Earth space, planetary defense, and even the long-term story of how material moves through the inner Solar System.

Meet 2025 PN7, Earth’s tiny quasi-moon

The object at the center of this story is not a second Moon in any familiar sense, but a modest asteroid that happens to move in step with Earth around the Sun. Cataloged as 2025 PN7, it follows a path that keeps it relatively close to our planet over long stretches of time, so from certain perspectives it seems to hover near us like a faint, offbeat satellite. Astronomers classify such bodies as quasi-moons or quasi-satellites, a label that reflects their gravitational independence from Earth even as they trace a similar yearly journe

What makes 2025 PN7 stand out is not its bulk but its delicacy: observations indicate it measures just 19 units across, a scale that places it firmly in the “tiny companion” category rather than anything approaching a true second Moon. That compact size, combined with its subtle motion against the background stars, explains why it could orbit in this configuration for a long time before anyone noticed, and why its discovery has prompted a fresh look at how many other small neighbors might be sharing Earth’s path around the Sun.

How a “surprise sidekick” was finally spotted

Finding something as small as 2025 PN7 requires both patient sky coverage and sensitive detectors, and in this case the breakthrough came from a survey instrument built precisely for that task. The asteroid was discovered on July 30, 2025 by the Pan-STARRS1 telescope at Haleakalā Observatory in Hawaii, a facility designed to sweep large swaths of the sky for moving points of light that betray the presence of near-Earth objects. That combination of wide-field imaging and repeated exposures allowed astronomers to pick out the faint track of this new body against the static star field.

In social media posts describing the find, researchers likened the object to a “surprise sidekick,” emphasizing that such a small body, only 19 units across, had been quietly accompanying Earth without drawing attention to itself. The discovery at Pan on the summit of Haleakalā Observatory in Hawaii underscores how modern survey programs can reveal companions that would have been invisible to earlier generations of telescopes, even though they share our planet’s orbital neighborhood.

What makes a quasi-moon different from a real Moon

Although 2025 PN7 is already being described as a quasi-moon, that label can be misleading if it is taken to mean Earth has acquired a second natural satellite in the same sense as the familiar Moon. A true moon is gravitationally bound to its planet and orbits that planet directly, tracing a closed path around it while both bodies circle the Sun. In contrast, a quasi-moon like 2025 PN7 orbits the Sun, not Earth, and only appears to loop around our planet because its orbital period and shape are closely matched to ours.

The distinction becomes clearer when compared with other known quasi-satellites, such as (469219) Kamoʻoalewa (2016 HO3), which is described as a quasi-satellite of Earth that, in certain frames of reference, appears to orbit our planet even though it is really circling the Sun. Studies of Kamo have even suggested it may be a fragment of the Moon blasted into space, highlighting how quasi-moons can be both dynamically intriguing and compositionally revealing. By placing 2025 PN7 in this context, astronomers can use its motion to probe the subtle gravitational interplay between Earth, the Moon, and the swarm of near-Earth asteroids.

A companion hiding in plain sight for decades

Orbital reconstructions indicate that 2025 PN7 has likely been accompanying Earth for a long time, its path shaped by the same solar gravity that governs our own orbit. Astronomers analyzing its trajectory have concluded that this asteroid has been shadowing Earth for decades, maintaining a configuration that keeps it relatively close to our planet without ever becoming a conventional satellite. That long-term stability is part of what makes the object so scientifically valuable, since it offers a natural experiment in how small bodies can share a planet’s orbital space over extended periods.

Reports on the discovery emphasize that Astronomers now see 2025 PN7 as an asteroid that has been moving with Earth for decades, effectively hiding in plain sight because of its tiny size and the complexity of its apparent motion in the sky. The fact that such a long-standing companion could go unnoticed until now underscores both the limitations of past surveys and the growing power of new instruments to map the near-Earth environment in far greater detail.

Earth’s “New Cosmic Companion” and what it tells us

Beyond the orbital mechanics, 2025 PN7 has quickly taken on a more evocative identity as Earth’s New Cosmic Companion, a phrase that captures both its proximity and its novelty. Descriptions of the find frame it as The Story of Quasi Moon 2025 PN7, a narrative that situates this small body within a broader effort to catalog the subtle, often surprising structures that share our planet’s path around the Sun. By treating it as a character in that story, scientists and communicators alike are highlighting how even a 19-unit-wide rock can reshape our sense of the Solar System’s architecture.

Analyses of Earth and its New Cosmic Companion emphasize that quasi-moons like 2025 PN7 remind us that space is full of surprises, particularly in the near-Earth region where gravitational resonances can trap small bodies in unusual configurations. The Story of Quasi Moon 2025 PN7 is therefore not just about a single asteroid, but about the dynamic processes that populate our orbital neighborhood with temporary companions, some of which may eventually escape or collide with other objects as their paths evolve.

How surveys and interstellar visitors sharpen our view

The detection of 2025 PN7 is part of a larger revolution in how astronomers scan the sky, driven by systematic survey programs that repeatedly image wide fields to catch anything that moves. One example is the ATLAS project, which has already demonstrated its power by identifying Comet 3I/ATLAS, an interstellar object discovered by a NASA-funded survey telescope in Rio Hurtado, Chile. That discovery relied on a survey strategy that flags unusual trajectories, and the same philosophy underpins the work of facilities like Pan-STARRS1 that are now revealing quasi-moons and other subtle companions.

According to Comet 3I/ATLAS facts, the object was identified through a survey approach that can pick out faint, fast-moving bodies, including those on paths that indicate an origin outside the Solar System. That same survey mindset has also led astronomers to spot other strange visitors, such as the interstellar object discussed in a Jul video that describes something unusual moving through our Solar System and heading our way. By refining these techniques, researchers are better equipped to notice both dramatic interstellar interlopers and quiet, long-term companions like 2025 PN7.

From Oumuamua to 3I/ATLAS: context for small, strange objects

The excitement around 2025 PN7 also reflects a broader fascination with small, hard-to-classify objects that challenge our expectations about what orbits the Sun. Earlier interstellar visitors such as ʻOumuamua showed that not every passing body fits neatly into the categories of comet or asteroid, and subsequent detections have reinforced that lesson. In one widely discussed case, NASA confirmed that a mysterious object shooting through the Solar System was an interstellar visitor and even assigned it a new name, underscoring how quickly such discoveries can reshape scientific debates.

Reports on that event note that NASA experts concluded the object was not bound to the Sun in the long term, marking it as a traveler from beyond our planetary system. A similar story has unfolded with Interstellar object 3I/ATLAS, which passed Earth and is now leaving the Solar System, headed out again after its brief visit. Coverage of Interstellar 3I/ATLAS highlights how even a relatively small body can carry crucial information about conditions in distant star systems, just as a quasi-moon like 2025 PN7 can illuminate the fine structure of our own orbital environment.

Why a tiny quasi-moon matters for planetary defense

On a practical level, the discovery of 2025 PN7 feeds directly into the growing field of planetary defense, which depends on a detailed inventory of near-Earth objects and their trajectories. Even though this particular asteroid is only 19 units across and poses no known threat, its detection proves that such small bodies can share Earth’s orbit for decades without being cataloged, a gap that matters when assessing impact risks. By refining the techniques that revealed this quasi-moon, astronomers improve their chances of spotting more hazardous objects of similar size or slightly larger before they come too close.

The broader survey ecosystem that caught 2025 PN7 is also responsible for identifying other unusual bodies, including the interstellar object highlighted in a An interstellar object video that describes something strange moving through our Solar System. Each of these detections, whether a fleeting visitor like 3I/ATLAS or a long-term companion like 2025 PN7, adds to a statistical picture of how many small objects cross Earth’s path and how their orbits evolve. In that sense, a tiny quasi-moon is not just a curiosity, but a data point that helps refine models used to protect the planet from future impacts.

The quiet revolution in mapping Earth’s orbital neighborhood

Stepping back, 2025 PN7 is part of a quiet revolution in how thoroughly we map the space around Earth, a process driven by better detectors, smarter software, and coordinated survey strategies. Where earlier generations of astronomers might have focused on bright planets and comets, today’s instruments are tuned to pick out faint, fast-moving specks that reveal a rich population of near-Earth asteroids, quasi-moons, and other transient companions. Each new detection, from Kamoʻoalewa to 3I/ATLAS to 2025 PN7, fills in another piece of a complex gravitational puzzle.

As I see it, the real story behind Earth’s so-called “second moon” is not about size or spectacle, but about the precision with which we can now track even a 19-unit-wide rock as it quietly shadows our orbit. The work that identified 2025 PN7, building on survey methods refined in projects like ATLAS and on analyses that recognized quasi-satellites such as Kamoʻoalewa, shows how far observational astronomy has come in just a few decades. It also hints at how many more subtle companions may still be waiting in the data, small in scale but large in what they can teach us about the constantly shifting architecture of our Solar System.

{ Morning Overview }

06-01-2026 om 22:46 geschreven door peter  

‘A window into the dark universe’: Astronomers spot an unexpected ‘ghostly object’ in the depths of space

• READ MORE: Scientists say dark energy may end our universe in a 'Big Crunch' 

By WILIAM HUNTER, SENIOR SCIENCE & TECHNOLOGY REPORTER

Scientists have discovered a new type of astronomical object, calling the strange entity a 'window into the dark universe'.

The object known as Cloud-9 is a completely starless, gas-rich cloud of dark matter located 14 million light-years from Earth.

The cloud's core is a vast, compact sphere of neutral hydrogen, about 4,900 light-years across.

That is more than 1,000 times greater than the distance between Earth and the nearest star, Proxima Centauri.

However, despite containing abundant stellar fuel, astronomers have now used the Hubble Space Telescope to confirm that Cloud-9 contains no stars whatsoever.

Scientists say that makes the cloud a building block of a galaxy that never quite formed, left over as a relic from the early universe.

Co-author Dr Andrew Fox, of the European Space Agency and the Space Telescope Science Institute, told the Daily Mail: 'You can think of it as a failed galaxy.

'A ghostly object that didn’t quite have enough mass to become self-gravitating and cross the threshold into star formation.'

Scientists have discovered a new type of astronomical object, a cloud of dark matter and hydrogen gas that contains no stars. Pictured: Magenta shows radio data from the gas cloud, and the dotted circle shows the peak of radio emissions

Cloud-9 is a previously theoretical type of object known as a Reionization-Limited H I Cloud, or 'RELHIC'.

What makes RELHICs unusual is that they are largely made up of dark matter, the invisible substance which makes up around 26 per cent of the universe's mass.

Although scientists can't directly observe dark matter, including the matter inside Cloud-9, they can tell that something with mass must be there because of the effects of gravity.

'The main piece of evidence for dark matter in this cloud is its size,' says Dr Fox,

'A cloud this size needs a source of gravity to hold it together. There are no stars to provide this gravity, and the neutral hydrogen gas does not contain enough mass, so dark matter must be the culprit. Without it, the cloud would simply fall apart.'

By looking at the radiation emitted by gases in the cloud, scientists estimate that the mass of hydrogen within is about one million times that of the sun.

However, for the cloud not to drift apart, Dr Fox and his colleagues estimate that it must contain around five billion solar masses of dark matter.

This discovery is extremely exciting for astronomers because RELHICs like Cloud-9 offer a snapshot into an exceptionally early moment in the universe's history.

Scientists say that the strange object (pictured), dubbed Cloud-9 and located 14 million light-years from Earth, is a failed galaxy that didn't have enough mass to produce stars 

Dr Fox says: 'Theories of galaxy formation predicted that there is a minimum threshold of dark matter required to ignite star formation and turn a dark cloud into a luminous galaxy.

'With Cloud-9, we have an example of an object just below this threshold, containing no stars.'

Although some scientists had thought that RELHICs might exist, they have proven exceptionally hard to find.

If the cloud were much larger, the gases would collapse into stars and form a galaxy; much smaller, and it would have fallen apart and blown away.

Co-author Dr Alejandro Benitez  Llambay, of the Milano-Bicocca University in Milan, told Daily Mail: 'Cloud-9 is a rare "middle ground" survivor.'

'According to our models, fewer than 10 per cent of halos in this mass range remain in such a pristine state, making Cloud-9 a "missing link" in our understanding of how galaxies are born.'

Likewise, since these objects don't contain any stars, RELHICs barely give off any of their own radiation and are exceptionally difficult to detect.

Cloud-9 was first spotted three years ago by the Five-hundred-meter Aperture Spherical Telescope (FAST) in Guizhou, China.

If the cloud had more mass, the gases would have collapsed into stars and formed a galaxy like its neighbour, the M94 spiral galaxy (pictured). Cloud-9 had just enough mass to stay together, but not so much that it formed stars 

However, it is only now that researchers have been able to use the Hubble Telescope to confirm that it contains no stars, making it very likely to be a RELHIC.

Lead author Dr Gagandeep Anand, of the Space Telescope Science Institute, says: 'Before we used Hubble, you could argue that this is a faint dwarf galaxy that we could not see with ground-based telescopes. They just didn't go deep enough in sensitivity to uncover stars.

Read More

• Newly discovered galaxy cluster could rewrite our understanding of the universe, experts say 

'In science, we usually learn more from the failures than from the successes. In this case, seeing no stars is what proves the theory right. It tells us that we have found in the local universe a primordial building block of a galaxy that hasn't formed.'

The discovery of Cloud-9, published in The Astrophysical Journal Letters, also makes it likely that there are more RELHICs out there, even in our local neighbourhood.

China's FAST telescope is particularly good at spotting these kinds of dark gas clouds, so researchers hope to discover more in the future.

Dr Fox adds: 'There absolutely should be more RELHICs out there, and we are looking for more candidates. We need more cases to know whether Cloud-9 is an oddball with unusual properties, or alternatively, is fairly typical.'

Dark matter: The mysterious substance that makes up 85% of the universe that scientists cannot confirm

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.

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{ https://www.dailymail.co.uk/sciencetech/index.html }

06-01-2026 om 21:58 geschreven door peter  

'Artificial intelligence' myths have existed for centuries – from the ancient Greeks to a pope's chatbot

'Artificial intelligence' myths have existed for centuries — from the ancient Greeks to a pope's chatbot

Prometheus – Heinrich Füger (c.1817) 

(Image credit: Heinrich Füger, Public domain, via Wikimedia Commons)

It seems the AI hype has turned into an AI bubble. There have been many bubbles before, from the Tulip mania of the 17th century to the derivatives bubble of the 21st century. For many commentators, the most relevant precedent today is the dotcom bubble of the 1990s. Back then, a new technology (the World Wide Web) unleashed a wave of "irrational exuberance." Investors poured billions into any company with ".com" in the name.

Three decades later, another new technology has unleashed another wave of exuberance. Investors are pouring billions into any company with "AI" in its name. But there is a crucial difference between these two bubbles, which isn't always recognised. The World Wide Web existed. It was real. General Artificial Intelligence does not exist, and no one knows if or when it ever will.

In February, the CEO of OpenAI, Sam Altman, wrote on his blog that the very latest systems have only just started to "point towards" AI in its "general" sense. OpenAI may market its products as "AIs," but they are merely statistical data-crunchers, rather than "intelligences" in the sense that human beings are intelligent.

So why are investors so keen to give money to the people selling AI systems? One reason might be that AI is a mythical technology. I don't mean it is a lie. I mean it evokes a powerful, foundational story of Western culture about human powers of creation.

Perhaps investors are willing to believe AI is just around the corner because it taps into myths that are deeply ingrained in their imaginations?

The myth of Prometheus

The most relevant myth for AI is the Ancient Greek myth of Prometheus.

There are many versions of this myth, but the most famous are found in Hesiod'spoems Theogony and Works and Days, and in the play Prometheus Bound, traditionally attributed to Aeschylus.

Prometheus was a Titan, a god in the Ancient Greek pantheon. He was also a criminal who stole fire from Hephaestus, the blacksmith god. Hiding the fire in a stalk of fennel, Prometheus came to earth and gave it to humankind. As punishment, he was chained to a mountain, where an eagle visited every day to eat his liver.

Prometheus' gift was not simply the gift of fire; it was the gift of intelligence. In Prometheus Bound, he declares that before his gift humans saw without seeing and heard without hearing. After his gift, humans could write, build houses, read the stars, perform mathematics, domesticate animals, construct ships, invent medicines, interpret dreams and give proper offerings to the gods.

The myth of Prometheus is a creation story with a difference. In the Hebrew Bible, God does not give Adam the power to create life. But Prometheus gives (some of) the gods' creative power to humankind.Hesiod indicates this aspect of the myth in Theogony. In that poem, Zeus not only punishes Prometheus for the theft of fire; he punishes humankind as well. He orders Hephaestus to fire up his forge and construct the first woman, Pandora, who unleashes evil on the world.

The fire that Hephaestus uses to make Pandora is the same fire that Prometheus has given humankind.

In this 18th-century engraving, Prometheus constructs the first man.  

(Image credit: AnonymousUnknown author, Public domain, via Wikimedia Commons)

The Greeks proposed the idea that humans are a form of artificial intelligence. Prometheus and Hephaestus use technology to manufacture men and women. As historian Adrienne Mayor reveals in her book Gods and Robots, the ancients often depicted Prometheus as a craftsman, using ordinary tools to create human beings in an ordinary workshop.

If Prometheus gave us the fire of the gods, it would seem to follow that we can use this fire to make our own intelligent beings. Such stories abound in Ancient Greek literature, from the inventor Daedalus, who created statues that came to life, to the witch Medea, who could restore youth and potency with her cunning drugs. Greek inventors also constructed mechanical computers for astronomy and remarkable moving figures powered by gravity, water and air.

The Pope and the chatbot

2,700 years have passed since Hesiod first wrote down the story of Prometheus. In the ensuing centuries, the myth has been endlessly retold, especially since the publication of Mary Shelley's Frankenstein; or the Modern Prometheus in 1818.

But the myth is not always told as fiction. Here are two historical examples where the myth of Prometheus seemed to come true.

Gerbert of Aurillac was the Prometheus of the 10th century. He was born in the early 940s CE, went to school at Aurillac Abbey, and became a monk himself. He proceeded to master every known branch of learning. In the year 999, he was elected Pope. He died in 1003 under his pontifical name, Sylvester II.

Rumours about Gerbert spread wildly across Europe. Within a century of his death, his life had already become legend. One of the most famous legends, and the most pertinent in our age of AI hype, is that of Gerbert's "brazen head." The legend was told in the 1120s by the English historian William of Malmesbury, in his well researched and highly regarded book, Deeds of the English Kings.

Gerbert was deeply learned in astronomy, a science of prediction. Astronomers could use the astrolabe to predict the position of the stars and foresee cosmological events such as eclipses. According to William, Gerbert used his knowledge of astronomy to construct a talking head. After inspecting the movements of the stars and planets, he cast a head in bronze that could answer yes-or-no questions.

First Gerbert asked the head:

"Will I become Pope?"

"Yes," answered the head.

Then Gerbert asked: "Will I die before I sing mass in Jerusalem?"

"No," the head replied.

In both cases, the head was correct, though not as Gerbert anticipated. He did become Pope, and he sensibly avoided going on pilgrimage to Jerusalem. One day, however, he sang mass at Santa Croce in Gerusalemme in Rome. Unfortunately for Gerbert, Santa Croce in Gerusalemme was known in those days simply as "Jerusalem."

Gerbert sickened and died. On his deathbed, he asked his attendants to cut up his body and cast away the pieces, so he could go to his true master, Satan. In this way, he was, like Prometheus, punished for his theft of fire.

Pope Sylvester II and the Devil 

(Image credit: Chronicon pontificum et imperatorum, Public domain, via Wikimedia Commons)

It is a thrilling story. It is not clear whether William of Malmesbury actually believed it. But he does try to persuade his readers that it is plausible. Why did this great historian with a devotion to the truth insert some fanciful legends about a French pope into his history of England? Good question!

Is it so fanciful to believe that an advanced astronomer might build a general-purpose prediction machine? In those days, astronomy was the most powerful science of prediction. The sober and scholarly William was at least willing to entertain the idea that brilliant advances in astronomy might make it possible for a Pope to build an intelligent chatbot.

Today, that same possibility is credited to machine-learning algorithms, which can predict which ad you will click, which movie you will watch, which word you will type next. We can be forgiven for falling under the same spell.

The anatomist and the automaton

The Prometheus of the 18th century was Jacques de Vaucanson, at least according to Voltaire:

Bold Vaucanson, rival of Prometheus,Seems, imitating the springs of nature,To steal the fire of heaven to animate the body.

Jacques de Vaucanson – Joseph Boze (1784) 

(Image credit: Joseph Boze, Public domain, via Wikimedia Commons)

Vaucanson was a great machinist, famous for his automata. These were clockwork devices that realistically simulated human or animal anatomy. Philosophers of the time believed that the body was a machine — so why couldn't a machinist build one?

Sometimes Vaucanson's automata were scientifically significant. He constructed a piper, for example, that had lips and lungs and fingers, and blew the pipe in much the same way a human would. Historian Jessica Riskin explains in her book The Restless Clock that Vaucanson had to make significant discoveries in acoustics in order to make his piper play in tune.

Sometimes his automata were less scientific. His digesting duck was hugely famous, but turned out to be fraudulent. It appeared to eat and digest food, but its poos were in fact prefabricated pellets hidden inside the mechanism.

Vaucanson spent decades working on what he called a "moving anatomy." In 1741, he presented a plan to the Lyons Academy to build an "imitation of all animal operations." Twenty years later, he was at it again. He secured support from King Louis XV to build a simulation of the circulatory system. He claimed he could build a complete, living artificial body.

There is no evidence that Vaucanson ever completed a whole body. In the end, he couldn't live up to the hype. But many of his contemporaries believed he could do it. They wanted to believe in his magical mechanisms. They wished he would seize the fire of life.

If Vaucanson could manufacture a new human body, couldn't he also repair an existing one? This is the promise of some AI companies today. According to Dario Amodei, CEO of Anthropic, AI will soon allow people "to live as long as they want." Immortality seems like an attractive investment.

Sylvester II and Vaucanson were great technologists, but neither was a Prometheus. They stole no fire from the gods. Will the aspiring Prometheans of Silicon Valley succeed where their predecessors have failed? If only we had Sylvester II's brazen head, we could ask it.

• This edited article is republished from The Conversation under a Creative Commons license. Read the original article.

{ https://www.livescience.com/physics-mathematics }

05-01-2026 om 22:49 geschreven door peter  

Chang’e 4 is a Chinese space probe that landed on the far side of the Moon on January 3, 2019. It not only studied the chemical composition of the rocks in this location, but also conducted the first experiment in history to grow plants on another celestial body.

Chinese space program

January 3, 2019, was a triumph for the Chinese space program. The rest of humanity also had reason to rejoice. For the first time in history, the Chang’e 4 spacecraft landed on the far side of the Moon, which we never see from Earth.

The road to this landing was quite long. China was late to the lunar race between the US and the USSR. The PRC had to implement its lunar program in the 21st century. It began with two spacecraft that operated in lunar orbit, photographing and remotely sensing the Moon. Both were named after Chang’e, the Chinese goddess of the Moon.

Initially, the Chang’e 1 spacecraft operated in lunar orbit from 2007 to 2009. It made general observations, which were hardly surprising at the time, since the US had already found water on our satellite.

However, in 2010, Chang’e 2 was launched to the Moon. It photographed the surface of our satellite from an altitude of only 100 km. In 2012, based on the data it collected, the Chinese government presented the most detailed map of the Moon at that time, and it was confirmed that all this time, the Chinese had been looking for a landing site for Chang’e 3.

Around that time, the first discussions about China’s lunar ambitions began, but no one knew how seriously to take them, since only two countries – the US and the USSR – had successfully landed on the Moon at that point.

However, on December 14, 2013, Chang’e 3 landed in the Sinus Iridum of the Mare Imbrium. It was not only the first spacecraft in 37 years to remain intact after reaching the surface of our satellite. It also carried the Yutu rover, named after the jade rabbit, a character from Chinese legends who is said to have prepared the powder of immortality on the Moon. At that time, China was able to explore the material of our satellite for the first time and confirm that it was exactly as American and Soviet scientists had determined.

The Chang’e 4

However, all this was a repeat of achievements made many years ago. In order to challenge the US, which had already announced plans to return to the Moon, it was necessary to show that Chinese missions could provide the global scientific community with data that no one had previously had access to.

This was the goal of the Chang’e 4 probe. In terms of design, it was a copy of the previous mission, with the same cameras and spectrographs, and even carried the Yutu-2 rover on board. However, this device was to land on the far side of the Moon, which humans first saw only in 1959 and, before the Chinese attempt, had only seen from orbit.

Moreover, Chang’e 4 was supposed to land in the Von Kármán lunar crater, which covers the much older and largest basin on our satellite, the South Pole-Aitken basin. Once, at the dawn of the solar system’s existence, a body much larger than the asteroid that ended the dinosaurs crashed into the Moon, which, scientists believe, led to the asymmetry of its two hemispheres: the visible and the reverse.

Almost all experimental data confirming this was obtained thanks to the Chinese missions Chang’e 4 and Chang’e 5, which followed it. But for them to be possible, it was first necessary to ensure their connection with Earth. This mission was entrusted to the Queqiao-1 relay satellite, which was launched to the Lagrange 2 point of the Earth-Moon system, i.e., directly behind our natural satellite.

Queqiao-1 began operating in May 2018, and in December of the same year, Chang’e 4 was launched to the Moon. It remained in orbit around our satellite for some time, and on January 3, 2019, it landed at the planned location. On the same day, it began scientific research and took photographs.

Yutu-2 rolled off the platform and began performing spectroscopic analysis of the rocks. After a few days, scientists had to interrupt their work because night fell on the Moon and the temperature dropped to extreme levels. However, two weeks later, when dawn finally broke, the mission resumed its work.

In total, Chang’e 4 lasted more than a year and a half. Technically, the mission is not yet complete. It is currently in sleep mode. Ultimately, it accomplished its main task: it examined the mantle rock emissions and noted how they are similar to and different from those found on the visible side of the Moon.

Growing plants on the Moon

The biggest difference in the design of Chang’e 4 from previous spacecraft was the addition of a module for biological experiments. It consisted of germinating seeds. This had been done repeatedly in space before, but it was all in Earth orbit.

It was Chang’e 4 that became the first spacecraft to successfully grow cotton, potato, and rapeseed seeds on another celestial body. This happened a few days after landing, and photos of the tiny sprouts went viral around the world. The experiment was supposed to last 100 days. During this time, the capsule with the samples had to be heated and humidified.

Incidentally, it also contained yeast spores and Drosophila fly eggs. So, theoretically, an entire ecosystem could have developed on board in later stages. However, with the onset of the lunar night, the temperature outside dropped too sharply, and too much electricity was needed for heating. Therefore, the experiment had to be interrupted.

Nevertheless, it is considered successful and was extremely important for global science. It proved the fundamental ability of plants to overcome the most difficult stage of their development in space conditions. In the future, humans will inevitably live in space, and we will need oxygen and nutrients that plants can provide. To achieve this, large modules with artificial biospheres will need to be created on planets. Similar to the one that was on board Chang’e 4.

• Posted in Articles

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 { https://universemagazine.com/en/articles-en/ }

05-01-2026 om 21:05 geschreven door peter  

Newly discovered galaxy cluster could rewrite our understanding of the universe, experts say – as it burns five times hotter than expected

• READ MORE: Scientists may have found evidence of primordial black holes

By WILIAM HUNTER, SENIOR SCIENCE & TECHNOLOGY REPORTER

A newly discovered galaxy cluster could rewrite our understanding of the cosmos, as scientists spot 'something the universe wasn’t supposed to have’.

Researchers found that the cluster was burning five times hotter than expected just 1.4 billion years after the Big Bang.

Astronomers had thought that such extreme temperatures would only be possible in more mature, stable galaxy clusters that formed later in the universe's life.

This hot 'baby cluster' could suggest that the earliest moments of the universe were far more explosive than previously thought.

Scientists believe that the unexpected heat might be the product of three supermassive black holes hidden in the depths of the cluster.

Co-author Dazhi Zhou, a PhD candidate at the University of British Columbia, says: 'We didn’t expect to see such a hot cluster atmosphere so early in cosmic history.

'In fact, at first I was sceptical about the signal as it was too strong to be real.

'But after months of verification, we’ve confirmed this gas is at least five times hotter than predicted, and even hotter and more energetic than what we find in many present-day clusters.'

Scientists have discovered 'something the universe wasn’t supposed to have' as they find a galaxy cluster burning five times hotter than expected just 1.4 billion years after the Big Bang

(artist's impression)

Galaxy clusters are some of the largest objects in the universe that can be held together under their own gravity.

They are enormous collections of individual galaxies, invisible dark matter, and superheated clouds of gas.

In the spaces between the galaxies, gas is heated into plasma that can reach hundreds of millions of degrees and shines brightly in the X-ray spectrum.

Scientists had thought this 'intracluster medium' was heated by gravitational interactions between galaxies as an immature, unstable cluster matures and collapses inward to a stable state.

However, the researchers' new discovery, published in Nature, suggests that this model of evolution might not be correct.

Using a group of telescopes known as the Atacama Large Millimeter/submillimeter Array (ALMA), the researchers looked 12 billion years into the past.

At this time, the galaxy cluster dubbed SPT2349-56 was extremely immature, but already extraordinarily large for its age.

Its core extends more than 500,000 light-years across, roughly the size of the vast halo of matter and dark matter surrounding the Milky Way.

Galaxy clusters are some of the largest objects in the universe, sometimes containing thousands of individual galaxies connected by clouds of superheated gas known as the intracluster medium. Pictured: A separate globular cluster known as NGC 2210

Using the ALMA (Atacama Large Millimeter/submillimeter Array) observatory, scientists measure the temperature of the intracluster medium in a galaxy cluster over 12 billion light-years from Earth. They discovered that this was far hotter than the best theories predicted 

The cluster also contains more than 30 extremely active galaxies which produce stars over 5,000 times faster than our own galaxy.

However, when researchers used ALMA to measure the temperature of the intracluster medium, they found that it was far hotter than the models predicted for this time in the universe.

Scientists aren't entirely sure how the cluster came to be so much hotter than expected.

However, the researchers suggest that it could be related to the three recently discovered supermassive black holes in the cluster.

Supermassive black holes are the largest class of black holes, with masses at least 100,000 times greater than that of our sun.

Supermassive black holes are typically found in the hearts of galaxies, where they feed on gases and release huge quantities of X-ray radiation.

Co-author Professor Scott Chapman, of Dalhousie University who conducted the research while at the National Research Council of Canada, says that these black holes were 'already pumping huge amounts of energy into the surroundings and shaping the young cluster, much earlier and more strongly than we thought.'

This comes as astronomers are finding more supermassive black holes in the early universe that appear to have grown much faster than expected.

Scientists say the heat was likely generated by three supermassive black holes. These are the largest class of black holes (artist's impression), and typically form in the cores of galaxies

This comes after researchers found a supermassive black hole actively growing inside a galaxy just 570 million years after the Big Bang (pictured), suggesting that black holes might have grown faster in the early universe than expected 

Last year, researchers using the James Webb Space Telescope spotted a 'little red dot' supermassive black hole that was actively growing inside a galaxy just 570 million years after the Big Bang.

Importantly, this black hole was much bigger than the size of the host galaxy would suggest.

This implies that black holes may have grown faster than the galaxies that hosted them in the early universe, even in relatively small galaxies.

Professor Chapman says that studying how these dynamics unfold is critical to explaining the universe around us today.

He says: 'Understanding galaxy clusters is the key to understanding the biggest galaxies in the universe.

'These massive galaxies mostly reside in clusters, and their evolution is heavily shaped by the very strong environment of the clusters as they form, including the intracluster medium.'

{ https://www.dailymail.co.uk/sciencetech/index.html }

05-01-2026 om 18:35 geschreven door peter  

Chang’e 4 is a Chinese space probe that landed on the far side of the Moon on January 3, 2019. It not only studied the chemical composition of the rocks in this location, but also conducted the first experiment in history to grow plants on another celestial body.

Chinese space program

January 3, 2019, was a triumph for the Chinese space program. The rest of humanity also had reason to rejoice. For the first time in history, the Chang’e 4 spacecraft landed on the far side of the Moon, which we never see from Earth.

The road to this landing was quite long. China was late to the lunar race between the US and the USSR. The PRC had to implement its lunar program in the 21st century. It began with two spacecraft that operated in lunar orbit, photographing and remotely sensing the Moon. Both were named after Chang’e, the Chinese goddess of the Moon.

Initially, the Chang’e 1 spacecraft operated in lunar orbit from 2007 to 2009. It made general observations, which were hardly surprising at the time, since the US had already found water on our satellite.

However, in 2010, Chang’e 2 was launched to the Moon. It photographed the surface of our satellite from an altitude of only 100 km. In 2012, based on the data it collected, the Chinese government presented the most detailed map of the Moon at that time, and it was confirmed that all this time, the Chinese had been looking for a landing site for Chang’e 3.

Around that time, the first discussions about China’s lunar ambitions began, but no one knew how seriously to take them, since only two countries – the US and the USSR – had successfully landed on the Moon at that point.

However, on December 14, 2013, Chang’e 3 landed in the Sinus Iridum of the Mare Imbrium. It was not only the first spacecraft in 37 years to remain intact after reaching the surface of our satellite. It also carried the Yutu rover, named after the jade rabbit, a character from Chinese legends who is said to have prepared the powder of immortality on the Moon. At that time, China was able to explore the material of our satellite for the first time and confirm that it was exactly as American and Soviet scientists had determined.

The Chang’e 4

However, all this was a repeat of achievements made many years ago. In order to challenge the US, which had already announced plans to return to the Moon, it was necessary to show that Chinese missions could provide the global scientific community with data that no one had previously had access to.

This was the goal of the Chang’e 4 probe. In terms of design, it was a copy of the previous mission, with the same cameras and spectrographs, and even carried the Yutu-2 rover on board. However, this device was to land on the far side of the Moon, which humans first saw only in 1959 and, before the Chinese attempt, had only seen from orbit.

Moreover, Chang’e 4 was supposed to land in the Von Kármán lunar crater, which covers the much older and largest basin on our satellite, the South Pole-Aitken basin. Once, at the dawn of the solar system’s existence, a body much larger than the asteroid that ended the dinosaurs crashed into the Moon, which, scientists believe, led to the asymmetry of its two hemispheres: the visible and the reverse.

Almost all experimental data confirming this was obtained thanks to the Chinese missions Chang’e 4 and Chang’e 5, which followed it. But for them to be possible, it was first necessary to ensure their connection with Earth. This mission was entrusted to the Queqiao-1 relay satellite, which was launched to the Lagrange 2 point of the Earth-Moon system, i.e., directly behind our natural satellite.

Queqiao-1 began operating in May 2018, and in December of the same year, Chang’e 4 was launched to the Moon. It remained in orbit around our satellite for some time, and on January 3, 2019, it landed at the planned location. On the same day, it began scientific research and took photographs.

Yutu-2 rolled off the platform and began performing spectroscopic analysis of the rocks. After a few days, scientists had to interrupt their work because night fell on the Moon and the temperature dropped to extreme levels. However, two weeks later, when dawn finally broke, the mission resumed its work.

In total, Chang’e 4 lasted more than a year and a half. Technically, the mission is not yet complete. It is currently in sleep mode. Ultimately, it accomplished its main task: it examined the mantle rock emissions and noted how they are similar to and different from those found on the visible side of the Moon.

Growing plants on the Moon

The biggest difference in the design of Chang’e 4 from previous spacecraft was the addition of a module for biological experiments. It consisted of germinating seeds. This had been done repeatedly in space before, but it was all in Earth orbit.

It was Chang’e 4 that became the first spacecraft to successfully grow cotton, potato, and rapeseed seeds on another celestial body. This happened a few days after landing, and photos of the tiny sprouts went viral around the world. The experiment was supposed to last 100 days. During this time, the capsule with the samples had to be heated and humidified.

Incidentally, it also contained yeast spores and Drosophila fly eggs. So, theoretically, an entire ecosystem could have developed on board in later stages. However, with the onset of the lunar night, the temperature outside dropped too sharply, and too much electricity was needed for heating. Therefore, the experiment had to be interrupted.

Nevertheless, it is considered successful and was extremely important for global science. It proved the fundamental ability of plants to overcome the most difficult stage of their development in space conditions. In the future, humans will inevitably live in space, and we will need oxygen and nutrients that plants can provide. To achieve this, large modules with artificial biospheres will need to be created on planets. Similar to the one that was on board Chang’e 4.

• Posted in Articles

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03-01-2026 om 20:29 geschreven door peter  

The US Space Agency has announced a search for an innovative system to detect and neutralize potential airborne threats in the form of drones. The goal is to protect personnel, rockets, and critical infrastructure in the area of the Kennedy Space Center at Cape Canaveral.

The decision to develop a special system was made in the context of a nationwide ban on the use of foreign-made drones for security reasons.

The Kennedy Space Center is the heart of the Artemis lunar program, from where powerful Space Launch System rockets will be launched. Any outside interference, even accidental, could have catastrophic consequences.

How the “smart shield” will work

According to the agency’s request, the system should include a network of stationary and mobile sensors (radar, radio frequency, optical). Its key tasks are:

• Detect and identify unknown drones at a distance of up to 64 km.
• Analyze risk in real time.
• Provide data for quick decision-making by the security service.

The system is scheduled to be implemented in April 2026. From now on, all drone flights in the central area will be strictly limited and will require special permission.

Balancing security and innovation

Interestingly, NASA itself periodically uses drones for festive events – for example, the visitor center hosts a show featuring 600 autonomous devices. The new system is designed to distinguish authorized flights from potentially dangerous ones, protecting the future of lunar missions.

This move demonstrates how space agencies are adapting to the challenges of a new era, where advanced technologies can bring both benefits and risks.

Earlier, we explained what a rocket drone is and how it differs from a UAV.

• Provided by: Gizmodo

• Posted in News, Tech

 { https://universemagazine.com/en/articles-en/ }

03-01-2026 om 20:16 geschreven door peter  

Should humans colonize other planets?

Should humans colonize other planets? 

(Image credit: Nzoka John/Getty Images)

The idea of humans living beyond Earth was once only possible in science fiction, but now space agencies are making plans to bring space colonization closer to reality. NASA and SpaceX are exploring long-term missions to the moon and Mars, while astronomers continue to discover potentially habitable exoplanets orbiting distant stars beyond our solar system.

Supporters of planetary colonization argue that becoming a multi-planet species could safeguard us from potentially Earth-ending events. However, it will require an enormous effort to colonize another planet or moon. And if we look beyond Mars, potentially habitable planets may take thousands of years to reach.

But as technology advances and space agencies consider long-term human settlements on other planets, a more fundamental issue now beckons — not whether we can expand to other worlds, but whether we should.

What's your take? Answer our poll below and share the reasoning behind your choice in the comments.

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• There may be hundreds of millions of habitable planets in the Milky Way, new study suggests
• 'Eyeball' planet spied by James Webb telescope might be habitable

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{ https://www.livescience.com/space }

02-01-2026 om 21:47 geschreven door peter  

Tractor beams inspired by sci-fi are real, and could solve the looming space junk problem

Researchers are developing a real-life tractor beam, with the goal of pulling defunct satellites out of geostationary orbit to alleviate the space junk problem.

By Harry Baker

An artist's illustration shows how an electrostatic tractor beam could be used to pull defunct satellites out of geostationary orbit around Earth. In reality, the beam would be invisible. 

(Image credit: Tobias Roetsch - gtgraphics.de)

In science fiction films, nothing raises tension quite like the good guys' spaceship getting caught in an invisible tractor beam that allows the baddies to slowly reel them in. But what was once only a sci-fi staple could soon become a reality.

Scientists are developing a real-life tractor beam, dubbed an electrostatic tractor. This tractor beam wouldn't suck in helpless starship pilots, however. Instead, it would use electrostatic attraction to nudge hazardous space junk safely out of Earth orbit.

The stakes are high: With the commercial space industry booming, the number of satellites in Earth's orbit is forecast to rise sharply. This bonanza of new satellites will eventually wear out and turn the space around Earth into a giant junkyard of debris that could smash into working spacecraft, plummet to Earth, pollute our atmosphere with metals and obscure our view of the cosmos. And, if left unchecked, the growing space junk problem could hobble the booming space exploration industry, experts warn.

The electrostatic tractor beam could potentially alleviate that problem by safely moving dead satellites far out of Earth orbit, where they would drift harmlessly for eternity.

While the tractor beam wouldn't completely solve the space junk problem, the concept has several advantages over other proposed space debris removal methods, which could make it a valuable tool for tackling the issue, experts told Live Science.

Related: 11 sci-fi concepts that are possible (in theory)

A prototype could cost millions, and an operational, full-scale version even more. But if the financial hurdles can be overcome, the tractor beam could be operational within a decade, its builders say.

"The science is pretty much there, but the funding is not," project researcher Kaylee Champion, a doctoral student in the Department of Aerospace Engineering Sciences at the University of Colorado Boulder (CU Boulder), told Live Science.

Avoiding Disaster

Tractor beams are a staple of sci-fi films and TV shows, such as Star Trek.

(Image credit: Star Trek)

The tractor beams depicted in "Star Wars" and "Star Trek" suck up spacecraft via artificial gravity or an ambiguous "energy field." Such technology is likely beyond anything humans will ever achieve. But the concept inspired Hanspeter Schaub, an aerospace engineering professor at CU Boulder, to conceptualize a more realistic version.

Schaub first got the idea after the first major satellite collision in 2009, when an active communications satellite, Iridium 33, smashed into a defunct Russian military spacecraft, Kosmos 2251, scattering more than 1,800 pieces of debris into Earth's orbit.

Related: How many satellites orbit Earth?

In the wake of this disaster, Schaub wanted to be able to prevent this from happening again. To do this, he realized you could pull spacecraft out of harm's way by using the attraction between positively and negatively charged objects to make them "stick" together.

Over the next decade, Schaub and colleagues refined the concept. Now, they hope it can someday be used to move dead satellites out of geostationary orbit (GEO) — an orbit around Earth's equator where an object's speed matches the planet's rotation, making it seem like the object is fixed in place above a certain point on Earth. This would then free up space for other objects in GEO, which is considered "prime real estate" for satellites, Schaub said.

How does it work?

The researchers have been testing the electron gun on pieces of metal in the lab. 

(Image credit: Nico Goda/CU Boulder)

The electrostatic tractor would use a servicer spacecraft equipped with an electron gun that would fire negatively charged electrons at a dead target satellite, Champion told Live Science. The electrons would give the target a negative charge while leaving the servicer with a positive charge. The electrostatic attraction between the two would keep them locked together despite being separated by 65 to 100 feet (20 to 30 meters) of empty space, she said.

Once the servicer and target are "stuck together," the servicer would be able to pull the target out of orbit without touching it. Ideally, the defunct satellite would be pulled into a "graveyard orbit" more distant from Earth, where it could safely drift forever, Champion said.

Related: 15 of the weirdest things we have launched into space

The electrostatic attraction between the two spacecraft would be extremely weak, due to limitations in electron gun technology and the distance by which the two would need to be separated to prevent collisions, project researcher Julian Hammerl, a doctoral student at CU Boulder, told Live Science. So the servicer would have to move very slowly, and it could take more than a month to fully move a single satellite out of GEO, he added.

That's a far cry from movie tractor beams, which are inescapable and rapidly reel in their prey. This is the "main difference between sci-fi and reality," Hammerl said.

Advantages and limitations

The amount of space junk surrounding Earth has greatly increased in recent years. Here is a comparison of space junk in 1965 (left) and 2010 (right). 

(Image credit: NASA)

The electrostatic tractor would have one big advantage over other proposed space junk removal methods, such as harpoons, giant nets and physical docking systems: It would be completely touchless.

"You have these large, dead spacecraft about the size of a school bus rotating really fast," Hammerl said. "If you shoot a harpoon, use a big net or try to dock with them, then the physical contact can damage the spacecraft and then you are only making the [space junk] problem worse."

Scientists have proposed other touchless methods, such as using powerful magnets, but enormous magnets are both expensive to produce and would likely interfere with a servicer's controls, Champion said.

Related: 

• How do tiny pieces of space junk cause incredible damage?

The main limitation of the electrostatic tractor is how slowly it would work. More than 550 satellites currently orbit Earth in GEO, but that number is expected to rise sharply in the coming decades.

If satellites were moved one at a time, then a single electrostatic tractor wouldn't keep pace with the number of satellites winking out of operation. Another limitation of the electrostatic tractor is that it would work too slowly to be practical for clearing smaller pieces of space junk, so it wouldn't be able to keep GEO completely free of debris.

Cost is the other big obstacle. The team has not yet done a full cost analysis for the electrostatic tractor, Schaub said, but it would likely cost tens of millions of dollars. However, once the servicer were in space, it would be relatively cost-effective to operate it, he added.

Next steps

Researcher Julian Hammerl photographed next to the ECLIPS machine at CU Boulder. 

(Image credit: Nico Goda/CU Boulder)

The researchers are currently working on a series of experiments in their Electrostatic Charging Laboratory for Interactions between Plasma and Spacecraft (ECLIPS) machine at CU Boulder. The bathtub-sized, metallic vacuum chamber, which is equipped with an electron gun, allows the team to "do unique experiments that almost no one else can currently do" in order to simulate the effects of an electrostatic tractor on a smaller scale, Hammerl said.

Once the team is ready, the final and most challenging hurdle will be to secure funding for the first mission, which is a process they have not yet started.

Most of the mission cost would come from building and launching the servicer. However, the researchers would ideally like to launch two satellites for the first tests, a servicer and a target that they can maneuver, which would give them more control over their experiments but also double the cost.

Related: 10 stunning shots of Earth from space in 2022

If they can somehow wrangle that funding, a prototype tractor beam could be operational in around 10 years, the team previously estimated.

Is it viable?

Space junk is becoming a major problem for the space exploration industry. 

(Image credit: CU Boulder)

While tractor beams may sound like a pipe dream, experts are optimistic about the technology.

"Their technology is still in the infancy stage," John Crassidis, an aerospace scientist at the University at Buffalo in New York, who is not involved in the research, told Live Science in an email. "But I am fairly confident it will work."

Removing space junk without touching it would also be much safer than any current alternative method, Crassidis added.

The electrostatic tractor "should be able to produce the forces necessary to move a defunct satellite" and "certainly has a high potential to work in practice," Carolin Frueh, an associate professor of aeronautics and astronautics at Purdue University in Indiana, told Live Science in an email. "But there are still several engineering challenges to be solved along the way to make it real-world-ready."

Scientists should continue to research other possible solutions, Crassidis said. Even if the CU Boulder team doesn't create a "final product" to remove nonfunctional satellites, their research will provide a stepping stone for other scientists, he added.

If they are successful, it wouldn't be the first time scientists turned fiction into fact.

"What is today's science fiction could be tomorrow's reality," Crassidis said.

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{ https://www.livescience.com/space }

02-01-2026 om 21:29 geschreven door peter  

The interstellar comet 3I/ATLAS has been the subject of a flurry of sensational reports claiming that it is an alien spacecraft. However, recent studies show that no technosignatures, i.e., radio signals or emissions of substances indicating that extraterrestrial technology is operating on its surface, have been detected.

New observations

Since the interstellar object (ISO) 3I/ATLAS was first discovered on July 1, 2025, it has garnered much attention, including speculation, hopes, and fears that it may somehow contain evidence of technologically advanced civilizations outside of our solar system.

Now, a new paper published on the arXiv preprint server details the findings from radio observations made at the 100-meter Green Bank Telescope as a part of the Breakthrough Listen program, designed to look for signs of alien life. The data were taken on December 18, 2025 — the day before the object’s closest approach to Earth, and those hoping for evidence of advanced alien civilizations may not like the results.

3I/ATLAS — natural or artificial object?

Only two other ISOs have ever been observed to enter our solar system. The first ISO, 1I/Oumuamua, was initially classified as an asteroid, then a comet; while the second, 2I/Borisov, was deemed to be a comet. 3I/ATLAS exhibits typical cometary characteristics, like a coma and an unelongated nucleus.

Yet, these objects often initially spark a lot of speculation. After its discovery, many rumors spread online about odd features of 3I/ATLAS indicating alien technology. However, scientists have also been actively studying the object, albeit with a bit more skepticism.

Now that six months have passed since its discovery, multiple telescopes have taken data in various wavelength bands, including radio, infrared, X-ray, and optical, and these data have been analyzed by many researchers. According to SETI, none of these observations have resulted in evidence of technosignatures.

Green Bank observations

The researchers involved in the new study say that interstellar probes are most likely to communicate using narrowband radio signals, due to their transmission efficiency and because of the low extinction associated with these signals across interstellar space. And so, the team conducted their signal search at four different radio bands covering 1-12 GHz right around the time of the comet’s closest approach.

The search picked up over 471,000 candidate signals initially, but after applying a sky localization filter, they were left with nine “events.” Further analysis showed that these were due to radio frequency interference, as they also appeared in off-target scans or were known contaminants. Even with its higher levels of sensitivity, the analysis found no candidate technosignature signals from 3I/ATLAS, which is in line with the results of other studies.

The study authors write, “Our survey concludes that there are no isotropic continuous-wave transmitters above 0.1W at the location of 3I/ATLAS. For comparison, a cell phone is an approximately isotropic continuous-wave transmitter at a level of ∼1W.”

The search continues

The data used in this study and other studies from the Breakthrough Listen program are publicly available, and data collection will continue on certain telescopes, such as Hubble. Those interested in 3I/ATLAS can expect more information to come, although it is unlikely at this point that technosignatures will be found.

Still, Earth’s many telescopes will continue to be on the lookout for future ISOs entering our solar system and potential technosignatures.

• Provided by: phys.org

• Posted in News, Science

{ https://universemagazine.com/en/articles-en/ }

02-01-2026 om 17:03 geschreven door peter  

2026: startsein voor Marskolonisatie? Ontdek de plannen!

©The Daily Digest

Een tijdlijn die steeds sneller gaat
De kolonisatie van Mars komt steeds dichterbij. Elon Musk, de CEO van SpaceX, heeft een nieuwe streefdatum aangekondigd voor de eerste Starship-missie naar de Rode Planeet. Volgens Musk zou deze missie tegen eind 2026 kunnen plaatsvinden. Dit ambitieuze tijdschema onderstreept de vooruitstrevende interplanetaire ambities van het bedrijf.

©The Daily Digest

Mars vóór mensen
Zoals de BBC meldt, zal de missie die voor 2026 gepland staat geen mensen aan boord hebben. Het plan is om een onbemande Starship te sturen, bedoeld als een grootschalige generale repetitie om cruciale systemen te testen voordat een menselijke landing wordt overwogen.

©The Daily Digest

Een erkende kansberekening
Musk schat de kans op ongeveer 50% dat SpaceX erin slaagt om binnen dit tijdsvenster een onbemande Starship naar Mars te sturen. Dat percentage weerspiegelt zowel technologisch optimisme als een opvallende erkenning van de omvang van de resterende uitdagingen.

©The Daily Digest

Waarom 2026 cruciaal is
Het jaar is geen toeval. In 2026 staan de aarde en Mars gunstig ten opzichte van elkaar, wat de reistijd en het brandstofverbruik aanzienlijk vermindert. Zo’n lanceervenster doet zich slechts ongeveer eens in de twee jaar voor.

©The Daily Digest

Starship als spil van de strategie
Starship vormt het hart van het hele plan. Met een hoogte van 123 meter is het het grootste raketsysteem ooit gebouwd en volledig ontworpen voor hergebruik. Voor Musk is het het onmisbare voertuig om Mars van idee tot daadwerkelijke bestemming te maken.

©The Daily Digest

Tests getekend door explosies
De weg naar Mars is allesbehalve probleemloos geweest. Starship kende meerdere mislukkingen tijdens testvluchten, waaronder twee explosies in de lucht in 2025. SpaceX analyseert momenteel gegevens om het verlies van meerdere motoren te begrijpen.

©The Daily Digest

De rol van de toezichthouder
Na het laatste incident eiste de Amerikaanse Federal Aviation Administration een formeel onderzoek voordat nieuwe vluchten worden toegestaan. Dat toezicht voegt extra onzekerheid toe aan een toch al kwetsbare planning.

©The Daily Digest

Een eerste stap, geen nederzetting
Ondanks het woord kolonisatie zal 2026 niet het jaar zijn waarin mensen op Mars wonen. In het beste geval markeert dit het begin van een reeks technische missies die het pad effenen, niet het eindpunt ervan, zoals ook de BBC benadrukt.

©The Daily Digest

Mensen vanaf 2029 – of later
Musk heeft aangegeven dat, als de eerste missies succesvol zijn, de eerste menselijke landingen rond 2029 zouden kunnen plaatsvinden. Tegelijkertijd erkent hij, zoals Al Jazeera opmerkt, dat 2031 waarschijnlijk realistischer is.

©The Daily Digest

Een multiplanetaire visie
Het uiteindelijke doel blijft om van de mensheid een multiplanetaire soort te maken. Mars neemt daarin een centrale plaats in, voorgesteld als een tweede thuis dat de overleving van de mens op lange termijn kan waarborgen.

©The Daily Diges

Optimus als symbolische passagiert
De eerste Marsmissie zou mogelijk de humanoïde robot Optimus van Tesla vervoeren. Zijn aanwezigheid zou vooral symbolisch zijn en technologische ambitie uitstralen, meer dan wetenschappelijke noodzaak.

©The Daily Digest

Een robot voor de aarde – en verder
Optimus werd in 2024 publiekelijk gepresenteerd en is ontworpen om alledaagse taken uit te voeren. Musk heeft gezegd dat de robot uiteindelijk tussen de 20.000 en 30.000 dollar zou kunnen kosten, wat het experimentele karakter onderstreept.

©The Daily Digest

Mars en de maan, parallelle routes
Mars is niet het enige doel op korte termijn. SpaceX speelt ook een sleutelrol in de maanplannen van NASA, waarbij een aangepaste versie van Starship moet dienen als menselijke lander voor het Artemis-programma.

©The Daily Digest

Een lange geschiedenis van beloftes
Musk heeft zijn tijdlijnen vaker moeten bijstellen. In 2016 sprak hij over een Marsmissie in 2018, in 2020 voorspelde hij menselijke aankomst zes jaar later, en in 2024 stelde hij opnieuw 2026 als mijlpaal.

©The Daily Digest

Ambitie versus realiteit
Deze geschiedenis verklaart waarom experts nieuwe aankondigingen met voorzichtigheid benaderen. Technische complexiteit, mislukte tests en regelgeving maken elke deadline voorlopig.

©The Daily Digest

Verkenning als iteratief proces
Binnen deze aanpak dient elke onbemande missie om systemen te valideren, fouten te corrigeren en risico’s te verkleinen voordat mensenlevens op het spel staan. Zelfs een mislukte poging in 2026 zou al een historisch moment betekenen.

©The Daily Digest

Meer dan symboliek
De impact zou verder reiken dan technologie alleen. Een interplanetaire lancering van deze schaal zou wetenschappelijke, economische en culturele gevolgen hebben op wereldniveau.

©The Daily Digest

Voorzichtige verwachtingen
Opmerkelijk genoeg temperde Musk zelf de verwachtingen. Zijn nadruk op een kans van 50% is ongebruikelijk in zijn retoriek en onderstreept de echte onzekerheid rond de missie.

©The Daily Digest

Het begin van een verhaal
Zo zal 2026 waarschijnlijk niet het jaar zijn waarin Mars daadwerkelijk wordt gekoloniseerd, maar het zou wel het jaar kunnen zijn waarin dat verhaal echt begint: een onzekere eerste stap, maar mogelijk een beslissen

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{ The Daily Digest }

02-01-2026 om 15:11 geschreven door peter  

NASA Returns to the Moon in 2026

NASA’s Artemis II mission will get the year off to an early start with current plans for an early-February launch for the first crewed lunar flyby since the Apollo program ended in 1972. Over the course of 10 days, it will bring astronauts around the Moon and back. During that time, Artemis II will test essential systems ahead of future moon landings under the Artemis program. These include the Orion life support system and optical communications between Earth and the Moon. Additionally, the mission will deploy cubesats from several countries, including Argentina, Saudi Arabia, and South Korea.

Through NASA’s Commercial Lunar Payload Services (CLPS) initiative, the space agency will send essential materials to the lunar surface this year through two missions with private commercial partners. These missions will serve as important steps toward a crewed Artemis III Moon landing and, eventually, a permanent lunar base.

Intuitive Machines IM-3

The Intuitive Machines IM-3 mission builds on the IM-2 mission, which was cut short in 2025 due to touchdown errors, leaving the Athena lander unable to generate sufficient power. IM-3 will include multiple landers, a rover, robotic explorers, and an environmental monitor, with a particular focus on investigating the Reiner Gamma lunar swirl. The strange spiraling features known as lunar swirls are linked to magnetic anomalies that have long been observed on the Moon. IM-3 will investigate their nature and, ideally, provide scientists with new insights into how they form. 

Meanwhile, Firefly Aerospace’s Blue Ghost Mission 2, set for late 2026, and its Elytra Dark orbital vehicle will deploy both Blue Ghost and the ESA’s Lunar Pathfinder satellite. After Blue Ghost sets down on the far side of the moon, Elyta will stay in orbit to provide communications relay and radio frequency calibration support for five years. The mission will lay the groundwork for permanent habitation by identifying helpful resources, testing lunar power network technologies, and improving lunar communications.

This year, SpaceX hopes to make Starship’s first orbital flight

(Credit: SpaceX)

From the Moon to Mars with SpaceX

SpaceX plans to continue operations with its twelfth Starship launch, which is expected to reach suborbital altitude. The booster stack for the launch has already been assembled, keeping the mission on track for February or March. Following that, flight thirteen may achieve Starship’s first orbital flight, proving the vehicle’s spaceworthiness. 

Later in the year, SpaceX has even more ambitious plans for Starship, including testing and demonstrating its Human Landing System for a crewed Artemis III mission and possibly launching uncrewed upper stages to Mars. From October to December, the 2026 Mars launch window will be open, a period when the two planets are optimally positioned for the shortest, most fuel-efficient journey between them every 26 months.

In 2024, SpaceX CEO Elon Musk outlined a plan to send five Starships loaded with Optimus robots to scout resources and prepare infrastructure for crewed missions scheduled for later windows. By May 2025, Musk estimated a 50% chance of meeting this goal. Later in the year, he admitted it was looking increasingly unlikely, but there was still a chance. Notably, the SpaceX website still states that the next launch window is in 2026, with no clear indication whether this goal will be met.

Another American aerospace company, Vast, is targeting a 2026 launch for the first-ever commercial space station. They will turn to SpaceX to launch the Haven-1 space station in May with a Falcon 9 rocket, followed by a 14-day crewed mission in June, arriving via a SpaceX Crew Dragon. Haven-1 will host a 10-slot microgravity research and manufacturing platform, along with amenities for a crew of four, available to paying customers

NASA Launches in 2026

Musk isn’t the only one taking advantage of the 2026 Mars window. In November, NASA launched the ESCAPADE mission into Earth orbit. Once the launch window opens, ESCAPADE, using Earth’s gravity, will slingshot to the red planet, where its two identical satellites will study how space weather affects the strange Martian magnetosphere.

To establish long-term habitability, the mission will explore how space weather, the planet’s thin atmosphere, and its magnetic crust interact. Scientists hope this new data will conclusively reveal how Mars lost its thick atmosphere. Data from the project will be essential to long-term safe habitation on the Red Planet, as it will enable mission planners to mitigate the effects of dangerous space weather in an environment that depends on artificial life support systems.

Several other NASA missions will make progress this year. The Discovery Program’s Psyche spacecraft will use a Mars gravity assist this summer to catapult it on its journey to the metallic asteroid 16 Psyche. The Europa Clipper Mission will use another gravity assist from Earth in December to fling it on its way to its final destination. In 2030, once it arrives at Europa, one of Jupiter’s moons, it will assess whether the moon is habitable.

Over the summer, NASA will launch a group of small cubesats about the size of toasters as part of its SunRISE (Sun Radio Interferometer Space Experiment) mission. Focused on space weather, the mission will monitor solar radio bursts and map the Sun’s magnetic field. As NASA extends human missions to the Moon and beyond to Mars, a better understanding of how the Sun’s charged particles can affect spacecraft will be essential to mission safety.

China’s previous lunar mission, Chang’e-6, returned samples from the far side of the Moon.

Credit: CNSA

Chinese Space Exploration in 2026

America is not the only country with grand space ambitions for 2026. China’s Chang’e 7 is anticipated to launch toward the end of the year. Named for the Chinese moon goddess, the Chang’e series has focused on investigating the lunar surface, which will continue with Chang’e 7’s exploration of the lunar south pole.

This area is particularly interesting for its cold traps: the shadowy craters that never receive enough direct sunlight to become illuminated. Their perpetual darkness leaves them with stores of frozen water and other minerals that could make them an essential supply for future permanent bases. The mission includes an orbiter, a relay satellite, a lander, a rover, and a mini-flying probe. While NASA has already sent missions such as LRCROSS to the area, future missions, including Artemis III, will revisit it.

To investigate another rocky body in space, the Chinese Tianwen-2 sample-return mission will rendezvous with the asteroid 469219 Kamo’oalewa in July for exploration and sample collection.

China’s Space Telescope

In addition to another lunar mission, China will add a new companion to its Tiangong space station, which launched in three sections between 2021 and 2022. Tiangong is China’s first long-term space station and has been used to host numerous experiments in low Earth orbit. The new addition is a space telescope named Xuntian, expected to capture 40% of the sky during its mission, with a field of view approaching 350 times that of the Hubble Space Telescope.

Initially, the telescope was to be part of the Tiangong itself, but concerns about light pollution, vibration, and the space station obstructing the view led China to decide to launch Xuntian as a free-standing object in the same orbit as the space station. The mission is planned to last 10 years. It will utilize five onboard instruments: a survey camera, a terahertz receiver, a multichannel imager, an integral-field spectrograph, and a cool-planet imaging coronagraph.

These images will allow researchers to measure the positions, shapes, and brightnesses of nearly one billion galaxies, providing new context for their growth and evolution. To capture them, Xuntian features a two-meter-wide aperture, which enables a field of view 350 times that of NASA’s Hubble Space Telescope.

JAXA’s Hayabusa-2 will continue its mission to investigate asteroids in 2026.

Credit: ESO/M. Kornmesser. Asteroid: T. Santana-Ros et al. Hayabusa2 model: SuperTKG (CC-BY-SA).

International Missions in 2026

The European Space Agency (ESA) and the Japan Aerospace Exploration Agency (JAXA) also have major plans for the year. Working together, the ESA-JAXA BepiColombo mission will enter Mercury orbit in November 2026, after which it will split into the Mercury Planetary Orbiter and the Mercury Magnetic Orbiter.

As the closest planet to the Sun, the mission will provide new insights into how hot planets near their stars evolve, with particular attention to their magnetic fields and magnetospheres. Additionally, mission measurements of Mercury’s motion will provide essential new data to evaluate Einstein’s general theory of relativity within the post-Newtonian formalism.

On its own, JAXA has two notable events planned. In July, Japan’s Haybusa-2 will conduct a flyby of the asteroid 98943 Torifune as part of its extended mission. More importantly, the Martian Moons eXploration (MMX) will launch in 2026 to perform a sample-return mission on the Martian moon Phobos and a flyby of the Martian moon Deimos. The return sample should reach Earth for study sometime in 2031.

Planetary defense will receive some significant attention in 2026 with the ESA HERA mission’s arrival at the asteroid Didymos in November. HERA will follow up on the 2022 NASA DART mission. DART was a practical planetary defense test that used a kinetic impactor to alter the course of an asteroid. With its two cubists, HERA will rendezvous with the binary asteroid Didymos to observe the aftermath of DART’s impact up close.

2026 will not just be a year of beginnings but also of endings. The ESA’s Solar Orbiter mission is scheduled to conclude in 2026, with a possible 2030 extension under consideration.

With a plethora of launches, gravity slingshots, tests, landings, flybys, and sample return missions slated for the upcoming year, don’t expect the space news to slow down in 2026.

• Ryan Whalen covers science and technology for The Debrief. He holds an MA in History and a Master of Library and Information Science with a certificate in Data Science. He can be contacted at ryan@thedebrief.org, and follow him on Twitter @mdntwvlf.

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01-01-2026 om 18:12 geschreven door peter  

Scientists discover the strangest planet ever found in our universe

©The Daily Digest

What did researchers discover now?
The universe is packed with strange cosmic secrets that are often hard for researchers to explain. However, that isn’t the case with the latest bizarre discovery that a group of scientists made while scanning data from the night sky.

©The Daily Digest

A planet full of diamonds
Scientists using the James Webb Space Telescope observed what they described as a ‘lemon-shaped planet’ that could be overflowing with diamonds in its core. How this very strange planet came to be is still a mystery.

©The Daily Digest

Photo Credit: NASA, ESA, CSA, Ralf Crawford (STScI)

Meet PSR J2322-2650b
PSR J2322-2650b, the official name given to the lemon-shaped diamond world, is what astronomers call an exoplanet, or a planet outside of our solar system. This weird world has about the same mass as Jupiter, but it’s very different.

©The Daily Digest

Photo Credit: Unsplash by Jan Huber

A very exotic atmosphere
NASA noted that PSR J2322-2650b has a very exotic atmosphere that is dominated by helium and carbon. Soot clouds could conceivably be floating through the air across the planet, which in turn could condense near the planet’s core and form diamonds.

©Provided by The Daily Digest

The planet was a surprise
"This was an absolute surprise," Peter Gao, a staff scientist at the Carnegie Earth and Planets Laboratory in Washington, and co-author of a paper about PSR J2322-2650b published in ‘The Astrophysical Journal Letters’ in early December.

©The Daily Digest

“What the heck is this?”
"I remember after we got the data down, our collective reaction was 'What the heck is this?'" Gao explained. His reaction makes a lot of sense since the strange makeup of PSR J2322-2650b is one of the least bizarre things about the planet.

©The Daily Digest

Photo Credit: NASA, ESA, CSA, Ralf Crawford (STScI)

Orbiting a pulsar star
PSR J2322-2650b is orbiting what is known as a pulsar star, which NASA noted is a type of rapidly spinning neutron star. Pulsars shoot out a beam of electromagnetic radiation at regular intervals, which will prove to be a big benefit for researchers.

©The Daily Digest

Studying the planet
According to a press release from the University of Chicago, researchers will be able to study the strange lemon-shaped planet across its whole orbit, something that would be very difficult since stars generally outshine their planets.

©Provided by The Daily Digest

A unique system
“This system is unique because we are able to view the planet illuminated by its host star, but not see the host star at all,” explained Maya Beleznay, a graduate student at Stanford University who worked on modelling PSR J2322-2650b’s orbit.

©The Daily Digest

Photo Credit: Wiki Commons By NASA/JPL-Caltech, Public Domain

Learning about planet formation
“We get a really pristine spectrum. And we can better study this system in more detail than normal exoplanets,” Beleznay added. Further study of PSR J2322-2650b is very important since it challenges much of what we know about planet formation.

©The Daily Digest

A mystery for now
How the weird lemon-shaped planet came to be is reportedly a mystery. University of Chicago researcher Michael Zhang, the principal author on the recently released study about PSR J2322-2650b, noted that the planet could not have formed normally because of its strange compositon.

©The Daily Digest

The mass of the Sun
“The planet orbits a star that's completely bizarre — the mass of the Sun, but the size of a city,” Zhang explained. “This is a new type of planet atmosphere that nobody has ever seen before.”

©The Daily Digest

The planet is unlike any other
Zhang added that the data showed the planet did not have the normal molecules they expected to see on an exoplanet like water, methane, and carbon dioxide, but rather molecular carbon like C3 and C2.

©Provided by The Daily Digest

Not formed normally
“It's very hard to imagine how you get this extremely carbon-enriched composition. It seems to rule out every known formation mechanism,” Zhang said. However, despite not understanding how this strange planet formed, we do have an idea about how the planet came to take a similar shape to a lemon.

©The Daily Digest

Photo Credit: Unsplash by Eléonore Bommart

How did it get its weird shape?

PSR J2322-2650b is abnormally close to its star. According to the scientists, the planet sits just one million miles away from the pulsar it orbits. Earth, for reference, is roughly 100 million miles away from our Sun. This close distance results in PSR J2322-2650b having a tight 7.8-hour orbit and puts the planet under a lot of gravitational stress.

©Provided by The Daily Digest

Gravity is twisting the planet
The gravitational pressure from being so close to its heavier pulsar star is what has pulled the Jupiter-mass planet into its strange lemon shape that has become the feature of this bizarre exoplanet. The press release from the University of Chicago reported that PSR J2322-2650b and its pulsar are what is known as a “black widow” system

©The Daily Digest

What is a Black Widow system?
“Black widows are a rare type of system where a rapidly spinning pulsar is paired with a small, low-mass companion,” the University of Chicago press release explained.

©The Daily Digest

Photo Credit: NASA, ESA, CSA, Ralf Crawford (STScI)

PSR J2322-2650b is strange indeed
“In the past, material from the companion would have streamed onto the pulsar, causing it to spin faster over time, which powers a strong wind. That wind and radiation then bombard and evaporate the smaller and less massive star,” the press release added.

 

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01-01-2026 om 15:37 geschreven door peter  

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30-12-2025 om 22:12 geschreven door peter  

Activist and researcher Amanda Nguyen, who flew on Blue Origin’s all-female spaceflight in April 2025, has admitted to suffering from severe psychological distress after the mission. After months of battling depression, she has reported feeling better and shared her experience of overcoming severe trauma.

Dream that turned into a challenge

In her Instagram post, Amanda revealed the deep depression that overwhelmed her after returning to Earth.

“Another dream turned into a nightmare,” she wrote. Nguyen described feeling that all her achievements – her scientific work, her historic status as the first Vietnamese woman in space – were “buried under an avalanche of misogyny” and hostile comments in the media.

A 34-year-old woman, the child of refugees who fled Vietnam by boat, felt like a “collateral victim.” She couldn’t get out of bed for weeks, and a month after the flight, she couldn’t speak through her tears during a call from a Blue Origin employee.

Despite her experiences, Amanda emphasized the positive outcomes of the mission. The flight drew attention to her breast cancer research and helped achieve the goal of using science as a tool for diplomacy. She recalled the symbolism: when Neil Armstrong was on the moon, bombs were falling on Vietnam, and now her family had seen a Vietnamese woman in space.

“We arrived in boats, and now we are in spaceships,” she wrote.

The road to recovery

Eight months later, Nguyen felt that “the fog of grief had begun to lift.” In her diary, she wrote, “I am happy to report that my depression is gone.” She concluded that the past never completely leaves us, but she is proud that she kept her promise to fight for her dreams and focus on kindness.

“The best gift this season is that I feel the fog lifting. I can say that it won’t take years,” Amanda Nguyen summed up.

Earlier, we reported on how a space tourist “saw death” after flying on New Shepard.

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30-12-2025 om 21:56 geschreven door peter  

The star described in the Gospels, which heralded the appearance of Jesus Christ in Bethlehem, behaves extremely strangely for a celestial body. However, scientists have calculated that under certain conditions, a comet could exhibit similar behavior. They even found a possible candidate.

The Star of Bethlehem

Recently, the Journal of the British Astronomical Association published an article in which scientists attempted to explain the nature of the star that, according to the Bible, heralded the birth of Jesus Christ in Bethlehem and guided the three wise men from the East to him. Surprisingly, they found a completely rational explanation for it.

This is not the first time scientists have tried to understand whether there is any real astronomical event behind the Gospel myth. And it is clear that the word “star” can actually mean any celestial body. However, in the Gospel of Matthias, where it is described in the most detail, its behavior seems too strange.

Based on the text, the star of Bethlehem was initially somewhere in the east, then, overtaking the Magi, it flew west and hovered somewhere at the zenith above the city where Jesus was born. And it is precisely its stopping in one place that seems most strange. Whether it is a planet, a comet, or something else in space, its rotation should be affected by the rotation of our planet; that is, one way or another, it should rise and set during the day.

But in reality, there is one object that truly seems to hover above one place – a satellite in geostationary orbit. Of course, it actually moves, but its linear velocity is such that its angular velocity coincides with the Earth’s rotation.

Comet from Chinese sources

And now scientists have calculated that the same suspension effect could have occurred when a comet flew close to Earth. Of course, it did not enter geosynchronous orbit. But it moved much faster than a satellite in geostationary orbit. This means that at some point, it could have actually hovered over Bethlehem for a couple of hours.

And the most interesting thing is that the authors have already found a good candidate for the role of the Star of Bethlehem – a comet mentioned in the Chinese chronicle “Han Shu,” also known as the History of the Former Han Dynasty. According to this document, the comet appeared in the second month of the second year and was visible for 70 days. This means that it was indeed very bright.

The specified time period is March-April 5 BC. And this coincides perfectly with assumptions about the true date of Jesus’ birth. After all, King Herod, the same one who is credited with the mass murder of infants, ruled Judea from 37 to 4 BC. So, from this point of view, everything is indeed reliable.

However, opponents of the “comet” theory have another argument. In the tradition of Eastern mystics, which theoretically included the three wise kings, the comet was associated with something bad. However, researchers have recently discovered that this is not entirely true, as its appearance could also be linked to events in the royal family. So it could indeed have been perceived as a sign of the birth of a new king.

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30-12-2025 om 21:30 geschreven door peter  

NASA scientists have proposed a new, unexpected source of energy that could sustain life in the deep ocean of Jupiter’s moon Europa. It may not be deep heat, but radioactive elements seeping from the ocean floor.

A revolutionary model was presented at the annual conference of the American Geophysical Union. It suggests that the key to life may lie not in the moon’s interior, but in the rocks at the bottom of its ocean. Radioactive decay of uranium and potassium in these rocks could provide the energy necessary for biology.

The scale of the possible biosphere

Researchers were inspired by terrestrial ecosystems in deep-sea hydrothermal vents, where microorganisms exist thanks to chemosynthesis – the process of obtaining energy from chemical reactions. A similar process may occur on Europa. Radioactive decay splits water molecules into hydrogen and oxygen ions, which can become “fuel” for microbes.

A team led by planetary scientist Ngoc Tuan Truong has modeled the concentration of radioactive isotopes in Europa’s ocean. Calculations showed that the energy released is sufficient to sustain biomass equivalent to a thousand blue whales. This discovery is particularly important in light of new data on Europa’s thick ice crust, which may insulate the ocean from the heat of the core.

Checking the theory

Evidence for this theory may be found by NASA’s Europa Clipper mission, which will reach Jupiter’s system in 2030. The spacecraft will study the composition of the ice and the deep processes of the moon. If the hypothesis is confirmed, Europa will be revealed as a world where life can feed on the energy of radioactive decay – a rather original scenario for the search for extraterrestrial intelligence.

Earlier, we explained whether Europa will be habitable when the Sun becomes old and red.

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30-12-2025 om 21:22 geschreven door peter  

It is quite possible that Mars was the first planet in the solar system where life originated. And only later did microorganisms from Mars reach Earth. So, from a certain point of view, we may be all Martians.

A bold hypothesis

How did life begin on Earth? While scientists have theories, they don’t yet fully understand the precise chemical steps that led to biology, or when the first primitive life forms appeared.

But what if Earth’s life did not originate here, instead arriving on meteorites from Mars? It’s not the most favored theory for life’s origins, but it remains an intriguing hypothesis. Here, we’ll examine the evidence for and against.

Timing is a key factor. Mars formed around 4.6 billion years ago, while Earth is slightly younger at 4.54 billion years old. The surfaces of both planets were initially molten, before gradually cooling and hardening.

Life could, in theory, have arisen independently on both Earth and Mars shortly after formation. While the surface of Mars today is probably uninhabitable for life as we know it, early Mars probably had similar conditions to early Earth.

The possibility of life forming on Mars

Early Mars seems to have had a protective atmosphere and liquid water in the form of oceans, rivers, and lakes. It may also have been geothermally active, with plenty of hydrothermal vents and hot springs to provide the necessary conditions for the emergence of life.

However, about 4.51 billion years ago, a Mars-sized, rocky planet called Theia crashed into proto-Earth. This impact caused both bodies to melt together and then separate into Earth and its moon. If life had begun before this event, it certainly would not have survived it.

Mars, on the other hand, probably didn’t experience a global remelting event. The red planet had its fair share of impacts in the violent early solar system, but evidence suggests that none of these would have been large enough to destroy the planet, and some areas could have remained relatively stable.

So if life arose on Mars shortly after the formation of the planet 4.6 billion years ago, it could have continued evolving without major interruptions for at least half a billion years. After this time, Mars’ magnetic field collapsed, marking the beginning of the end for Martian habitability. The protective atmosphere disappeared, leaving the planet’s surface exposed to freezing temperatures and ionizing radiation from space.

The time required for life to emerge

But what of Earth: how soon did life appear after the impact that formed the moon? Tracing the tree of life back to its root leads to a microorganism called Luca – the last universal common ancestor. This is the microbial species from which all life today is descended. A recent study reconstructed Luca’s characteristics using genetics and the fossil record of early life on Earth. It is inferred that Luca lived 4.2 billion years ago – earlier than some previous estimates.

Luca was not the earliest organism on Earth, but one of multiple species of microbe existing in tandem on our planet at this time. They were competing, cooperating, and surviving the elements, as well as fending off attacks from viruses.

If small but fairly complex ecosystems were present on Earth around 4.2 billion years ago, life must have originated earlier. But how much earlier? The new estimate for the age of Luca is 360 million years after the formation of Earth and 290 million years after the moon-forming impact. All we know is that in these 290 million years, chemistry somehow became biology. Was this enough time for life to originate on Earth and then diversify into the ecosystems present when Luca was alive?

A Martian origin for terrestrial life circumvents this question. According to the hypothesis, species of Martian microorganism could have traveled to Earth on meteorites just in time to take advantage of the clement conditions following the moon’s formation.

The timing may be convenient for this idea. However, as someone who works in the field, my hunch would be that 290 million years is plenty of time for chemical reactions to produce the first living organisms on Earth, and for biology to subsequently diversify and become more complex.

Surviving the journey

Luca’s reconstructed genome suggests that it could live off molecular hydrogen or simple organic molecules as food sources. Along with other evidence, this suggests that Luca’s habitat was either a shallow marine hydrothermal vent system or a geothermal hot spring. Current thought in the origin of life field is that these kinds of environments on early Earth had the necessary conditions for life to emerge from non-living chemistry.

Luca also contained biochemical machinery that could protect it from high temperatures and UV radiation – real dangers in these early Earth environments. However, it’s far from certain that early life forms could have survived the journey from Mars to Earth. And there’s nothing in Luca’s genome to suggest that it was particularly well adapted to space flight.

To have made it to Earth, microorganisms would need to have survived the initial impact on Mars’ surface, a high-speed ejection from the Martian atmosphere, and travel through the vacuum of space while being bombarded by cosmic rays for at least the best part of a year.

They would then have needed to survive the high-temperature entry through Earth’s atmosphere and another impact onto the surface. This last event may or may not have deposited it in an environment to which it was even remotely adapted.

The chances of all of this seem pretty slim to me. However difficult the transition from chemistry to biology may appear, it seems far easier to me than the idea that this transition would occur on Mars, with life forms surviving the journey to Earth, and then adapting to a completely new planet.

The resilience of microorganisms in space

It’s useful to look at studies of whether microorganisms could survive the journey between planets. So far, it looks like only the hardiest microorganisms could survive the journey between Mars and Earth. These are species adapted to preventing damage from radiation and capable of surviving desiccation through the formation of spores.

But maybe, just maybe, if a population of microorganisms were trapped in the interior of a sufficiently large meteorite, they could be protected from most of the harsh conditions of space. Some computer simulations even support this idea. Further simulations and laboratory experiments to test this are ongoing.

This raises another question – if life made it from Mars to Earth within the first 500 million years of our solar system’s existence, why hasn’t it spread from Earth to the rest of the solar system in the following four billion years? Maybe we’re not the Martians after all.

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30-12-2025 om 21:08 geschreven door peter  

A snapshot of the universe at work: Incredible image shows 'star-making factory' inside a Large Magellanic Cloud

By JAKE HOLDEN, UK NEWS REPORTER

A new picture from NASA's Hubble Space Telescope has revealed a beautiful 'star-making factory' deep in the universe this week.

The image focuses in on a piece of space 160,000 light years from Earth in the Large Magellanic Cloud.

That means it takes light 160,000 years to travel the distance to this 'star factor', so this is actually what it looked like 160,000 years ago.

Here on Earth, Neanderthals were extinct only 40,000 years ago, so would still be roaming our planet for another 120,000 years after this light was emitted from the factory.

This is an unfathomably gigantic scale the telescope has revealed, with the full width of this factory being 150 light years across too.

Thick clouds of cold hydrogen - star fuel - twist over the giant area, glowing deep red where baby stars are forming, burning.

Some erratic stars have blasted their surroundings with powerful stellar winds which carve out giant bubbles in the gas.

The Large Magellanic Cloud is a nearby dwarf irregular galaxy which is a satellite of our Milky Way, slowly orbiting our galaxy. The Milky Way itself is 100,000 light years across.

It is visible in the southern hemisphere of Earth in the constellations of Dorado and Mensa, showing as a large misty cloud, easily seen by the naked eye in dark skies.

The Hubble Space Telescope has been in a low Earth orbit for the past three decades and has been revealing far away pieces of space for all that time. It is a joint project between NASA and the European Space Agency (ESA).

This new picture from the Hubble Space Telescope shows a 'star factory' at work in the Large Magellanic Cloud

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30-12-2025 om 18:04 geschreven door peter  

They’re some of the most sterile places on Earth – but scientists have discovered dozens of new bacterial species inside NASA’s cleanrooms.

These facilities are ultra-sanitised, highly controlled spaces where spacecraft and sensitive instruments are built and tested.

They are designed to prevent any form of contamination and to stop unwanted microbes from hitching a ride to other planets.

So experts were left stunned after finding 26 tiny living organisms – all previously unknown bacterial species – in the Kennedy Space Center cleanrooms in Florida.

Despite stringent measures including filtering air, the strict regulation of temperature and humidity and the use of harsh chemical detergents, these microbes have somehow managed to survive.

‘It was a genuine “stop and re-check everything” moment,’ Alexandre Rosado, a professor of Bioscience at King Abdullah University of Science and Technology (KAUST) in Saudi Arabia, told Live Science.

Recent analysis of these microbes has shed light on how they can live – and even thrive – in one of the harshest man-made environments on Earth.

And it turns out they have genes that help them resist the effects of radiation and even repair their own DNA.

A selection of the 26 new bacterial species discovered in the cleanroom, despite the facility being ultra-sanitised and highly controlled

The Phoenix Mars Lander in the cleanroom at the Kennedy Space Center. This photograph was taken in 2007, when bacterial samples were collected from the floor

The main goal of cleanrooms is to stop Earth’s organisms contaminating other planets that could potentially contain life.

They also play a crucial role in protecting Earth from potential alien hitchhikers in returned samples.

However, ‘cleanrooms don’t contain “no” life’, Professor Rosado said. ‘Our results show these new species are usually rare but can be found.’

The new species were identified lurking in cleanrooms where NASA assembled its Phoenix Mars Lander in 2007.

They were collected and preserved at the time, and recent advances in DNA technology has allowed scientists to properly analyse them.

The findings, published in the journal Microbiome, read: ‘Maintaining the biological cleanliness of NASA’s mission-associated cleanrooms, where spacecraft are assembled and tested, is critical for planetary protection.

‘Even with stringent controls such as regulated airflow, temperature management and rigorous cleaning, resilient microorganisms can persist in these environments, posing potential risks for space missions.’

The next step, experts said, is to figure out whether any of these tiny organisms could have potentially tolerated conditions during a journey to Mars’ northern polar cap, where Phoenix landed in 2008.

This image shows Phoenix hanging from its parachute as it descended to the Martian surface in 2008

Experts said the next step is to work out whether any of these microorganisms could have survived the trip to the Red Planet. Pictured: The Phoenix Lander on Mars

Professor Rosado said several species do carry genes that may help them adapt to the stresses of spaceflight.

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But their survival would depend on how they handle the harsh conditions of the journey and on the Red Planet itself, including exposure to vacuum, deep cold and high levels of UV.

To explore this further, the team plan to test the microbes inside a ‘planetary simulation chamber’ that could reveal whether they could survive a trip through space.

One is currently being built at JAUST, with its first experiments expected to commence in early 2026.

The team said that beyond space exploration, these microbes hold ‘immense promise’ for biotechnology as their resistance to radiation and chemical stressors could drive innovations in medicine, pharmaceuticals and the food industry.

MARS: THE BASICS

Mars is the fourth planet from the sun, with a 'near-dead' dusty, cold, desert world with a very thin atmosphere. 

Mars is also a dynamic planet with seasons, polar ice caps, canyons, extinct volcanoes, and evidence that it was even more active in the past. 

It is one of the most explored planets in the solar system and the only planet humans have sent rovers to explore.

One day on Mars takes a little over 24 hours and a year is 687 Earth days.

Facts and Figures 

Orbital period: 687 days

Surface area: 55.91 million mi²

Distance from Sun: 145 million miles

Gravity: 3.721 m/s²

Radius: 2,106 miles

Moons: Phobos, Deimos

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30-12-2025 om 17:54 geschreven door peter