The official number of exoplanets—planets outside our solar system—tracked by NASA has reached 6,000. Confirmed planets are added to the count on a rolling basis by scientists from around the world, so no single planet is considered the 6,000th entry. The number is monitored by NASA's Exoplanet Science Institute (NExScI), based at Caltech's IPAC in Pasadena, California. There are more than 8,000 additional candidate planets awaiting confirmation, with NASA leading the world in searching for life in the universe.

"This milestone represents decades of cosmic exploration driven by NASA space telescopes—exploration that has completely changed the way humanity views the night sky," said Shawn Domagal-Goldman, acting director, Astrophysics Division, NASA Headquarters in Washington.

"Step by step, from discovery to characterization, NASA missions have built the foundation to answering a fundamental question: Are we alone? Now, with our upcoming Nancy Grace Roman Space Telescope and Habitable Worlds Observatory, America will lead the next giant leap—studying worlds like our own around stars like our sun. This is American ingenuity, and a promise of discovery that unites us all."

The milestone comes 30 years after the first exoplanet was discovered around a star similar to our sun, in 1995. (Prior to that, a few planets had been identified around stars that had burned all their fuel and collapsed.)

Although researchers think there are billions of planets in the Milky Way galaxy, finding them remains a challenge. In addition to discovering many individual planets with fascinating characteristics as the total number of known exoplanets climbs, scientists are able to see how the general planet population compares to the planets of our own solar system.

This animation shows the locations of the exoplanets that had been confirmed as of 2022, in the order they were discovered. Sound on! 🔊
https://t.co/KtZEDIDNVB

#PPOD: Solar Cells ☀️

The National Science Foundation (NSF) Daniel K. Inouye Solar Telescope has captured the highest-resolution image of the Sun's surface ever recorded. The image, produced by the National Solar Observatory (NSO), reveals a turbulent, "boiling" pattern of gas covering our star. The "boiling" appearance consists of cell-like structures, each approximately the size of Texas, which are formed by convective currents that move heat from the Sun's interior to its surface. Hot plasma rises in the center of the cells and sinks in the dark lanes at the edges. Tiny, bright markers of magnetic fields are visible in the dark lanes. It is thought that these specks of light funnel energy into the corona, the Sun's outer atmosphere, which could explain its high temperature. This image was part of the Inouye Solar Telescope's first-light observations, and its high resolution allows for the viewing of features as small as 30 kilometers for the first time.

Credit: Inouye Solar Telescope, NatSolarObs AURADC NSF

The first-ever measurements of the ethanol content of fruits available to chimpanzees in their native African habitat show that the animals could easily consume the equivalent of more than two standard alcoholic drinks each day, according to researchers at the University of California, Berkeley.

It's not clear whether they actively seek out fruit with high ethanol levels, which are typically riper fruit with more sugars to ferment. But the availability of ethanol in many species of fruit that they normally eat suggests that alcohol is a regular part of their diet and likely was a part of the diets of our human ancestors.

"Across all sites, male and female chimpanzees are consuming about 14 grams of pure ethanol per day in their diet, which is the equivalent to one standard American drink," said UC Berkeley graduate student Aleksey Maro of the Department of Integrative Biology. "When you adjust for body mass, because chimps weigh about 40 kilos versus a typical human at 70 kilos, it goes up to nearly two drinks."

A "standard drink" in the U.S. contains 14 grams of ethanol, irrespective of the consumer's body size, although in much of Europe the standard is 10 grams.

The 21 species of fruit Maro sampled at two chimp study sites—Ngogo in Uganda and Taï in Ivory Coast—had an average alcohol content of 0.26% by weight. Primatologists who have studied chimps at these sites estimate that the animals consume about 10 pounds (4.5 kilograms) of fruit per day, on average, and that fruit makes up about three-quarters of their diet. The researchers have also recorded for each site the approximate proportion of each fruit species in the chimp diet. This information allowed the Berkeley biologists to calculate an average rate of dietary ethanol consumption.

"The chimps are eating 5 to 10% of their body weight a day in ripe fruit, so even low concentrations yield a high daily total—a substantial dosage of alcohol," said Robert Dudley, UC Berkeley professor of integrative biology. "If the chimps are randomly sampling ripe fruit as did Aleksey, then that's going to be their average consumption rate, independent of any preference for ethanol. But if they are preferring riper and/or more sugar-rich fruits, then this is a conservative lower limit for the likely rate of ethanol ingestion."

Fruit consumption occurs throughout the day and the chimps show no overt signs of intoxication, Maro said. In fact, to get a buzz on, a chimp would have to eat so much fruit its stomach would bloat. But chronic low-level exposure suggests that the common ancestors of humans and chimps—our closest living relative among the apes—were also exposed daily to alcohol from fermenting fruit, a nutrient that is missing from the diets of captive chimps and many humans today.

"Chimpanzees consume a similar amount of alcohol to what we might if we ate fermented food daily," Maro said. "Human attraction to alcohol probably arose from this dietary heritage of our common ancestor with chimpanzees."

Scientists at Hiroshima University have created a practical and highly sensitive method for detecting the Unruh effect, a long-anticipated phenomenon that lies at the intersection of relativity and quantum theory. This new strategy not only advances the study of fundamental physics but also opens the door to future technological applications.

The work was recently published in the journal Physical Review Letters.

The Fulling-Davies-Unruh effect, often referred to simply as the Unruh effect, is a profound theoretical concept linking Albert Einstein’s Theory of Relativity with Quantum Theory. “In quantum theory, even the vacuum seethes with tiny energy fluctuations, where particles and antiparticles briefly appear and vanish. Remarkably, the Unruh effect shows how these ‘vacuum ripples’ are perceived depends on the observer’s motion. A stationary observer sees nothing, but an observer undergoing acceleration perceives them as real particles with a thermal energy distribution—a ‘quantum warmth’,” explained Noriyuki Hatakenaka, professor emeritus at Hiroshima University.

This surprising prediction highlights the deep relationship between two cornerstones of modern physics. Experimentally verifying the Unruh effect would not only unite aspects of relativity and quantum mechanics but also offer valuable insights into the very structure of spacetime. However, achieving such verification has remained one of the most persistent and difficult challenges in physics.

A new trend is emerging in psychiatric hospitals. People in crisis are arriving with false, sometimes dangerous beliefs, grandiose delusions, and paranoid thoughts. A common thread connects them: marathon conversations with AI chatbots.

WIRED spoke with more than a dozen psychiatrists and researchers, who are increasingly concerned. In San Francisco, UCSF psychiatrist Keith Sakata says he has counted a dozen cases severe enough to warrant hospitalization this year, cases in which artificial intelligence “played a significant role in their psychotic episodes.” As this situation unfolds, a catchier definition has taken off in the headlines: “AI psychosis.”

Some patients insist the bots are sentient or spin new grand theories of physics. Other physicians tell of patients locked in days of back-and-forth with the tools, arriving at the hospital with thousands upon thousands of pages of trannoscripts detailing how the bots had supported or reinforced obviously problematic thoughts.
Reports like this are piling up, and the consequences are brutal. Distressed users and family and friends have described spirals that led to lost jobs, ruptured relationships, involuntary hospital admissions, jail time, and even death. Yet clinicians tell WIRED the medical community is split. Is this a distinct phenomenon that deserves its own label, or a familiar problem with a modern trigger?

AI psychosis is not a recognized clinical label. Still, the phrase has spread in news reports and on social media as a catchall denoscriptor for some kind of mental health crisis following prolonged chatbot conversations. Even industry leaders invoke it to discuss the many emerging mental health problems linked to AI. At Microsoft, Mustafa Suleyman, CEO of the tech giant’s AI division, warned in a blog post last month of the “psychosis risk.” Sakata says he is pragmatic and uses the phrase with people who already do. “It’s useful as shorthand for discussing a real phenomenon,” says the psychiatrist. However, he is quick to add that the term “can be misleading” and “risks oversimplifying complex psychiatric symptoms.”

It’s hard enough to know what Neanderthals looked like, let alone sounded like. However, there’s good reason to suspect our extinct hominin cousins were capable of complex language – and not just grunts and groans.

You may be one of the millions of people who have seen the viral clip from the BBC show Neanderthal: The Rebirth, which explores the so-called “high-pitched voice theory”.

To recreate the sound of Neanderthal voices, vocal coach Patsy Rodenburg worked with a 3D model of a Neanderthal vocal tract, alongside knowledge of their anatomy, such as a deep rib cage, heavy skull, and large nasal cavity. When she applied this understanding to a human singer, the result was an uncanny, high-pitched, nasal shriek. (Watch video here)

This is just one interpretation, but it’s a question that has been attacked from a more scientific angle.

The idea that Neanderthals are heavy-browed, brutish cavemen is an outdated one. An overwhelming amount of evidence now shows that, just like us, they were highly intelligent, culturally complex, and emotionally sensitive beings.

We know that Neanderthals had similar cognitive abilities to us, plus their brains were roughly the same size or bigger than ours, albeit with a different shape, so we can loosely assume they had the necessary neural hardware to compute language.

A look back at everyone on Earth #OTD in 1977.

NASA's Voyager 1 took the first image of the Earth and Moon in the same frame 48 years ago today. The spacecraft, which began its mission two weeks earlier, captured this scene from 7.25 million miles (11.7 million km) away.

From butterflies to grasshoppers, many delicate little things that run our world are in dire trouble. Not just in regions where human activity directly affects the landscape, but even in remote, human-free zones, a new study finds.

The loss of insects in key areas around the globe has been attributed in the past to the deliberate reduction of biodiverse habitats and changes in local climate. Now it's clear these forces stretch far beyond our immediate spheres of influence.

In areas relatively undisturbed by direct human activity, University of North Carolina biologist Keith Sockman recorded a dramatic drop of over 70 percent of flying insects in just 20 years.

NorthropGrumman's Cygnus XL cargo craft, packed with over 11,000 pounds of science and supplies, was captured by the Canadarm2 robotic arm operated by JonnyKimUSA as Zenanaut monitored at 7:24am ET today.

Neutrinos are one of the most enigmatic particles in the standard model. The main reason is that they're so hard to detect. Despite the fact that 400 trillion of them created in the Sun are passing through a person's body every second, they rarely interact with normal matter, making understanding anything about them difficult.

To help solve their mysteries, a new neutrino detector in China recently started collecting data, and hopes to provide insight on between 40 and 60 neutrinos a day for the next 10 years.

The detector, known as the Jiangmen Underground neutrino Observatory, or JUNO, is located in between two huge nuclear plants at Yangjian and Taishan. Both of those fission plants create their own artificial neutrinos in addition to the ones created by the Sun, meaning the general area should be awash with barely interacting particles.

That's despite the fact that, like most neutrino detectors, it's located underground. 700 meters underground in fact. The physical bulk of the Earth's crust is meant to block most other particles, like muons, from getting to it, and at other installations, like IceCube, it does a pretty good job.

In a major breakthrough for pregnancy research, scientists have 3D bioprinted “mini placentas”. The miniature organs, or “organoids”, closely resemble human placental tissue, providing an accurate model for studying the early placenta – something that has been sorely lacking until now.

The placenta plays a vital role in supporting fetal development, and its dysfunction is linked to numerous pregnancy complications, including miscarriage, preeclampsia, preterm birth, and stillbirth. These conditions can also have long-term health implications for both mother and baby, increasing the risk of future cardiovascular, endocrine, and neurological diseases. Yet, treatment options are limited, as is our understanding of placental biology.

Check out the view from up here! As the Curiosity rover continues to climb the flanks of Mt. Sharp, it has captured an extraordinarily clear panorama of Gale Crater's rim...and even the lands beyond. Details:
https://t.co/Zv9gQzybLO

The first living creatures intentionally sent into space were fruit flies! They travelled aboard a V2 rocket on 20 February 1947. NASA currently recognises the altitude of 100km as the point where space begins, making the fruit flies the first living creatures considered to have reached space.

Nonprofit environmental organization the Ocean Cleanup has announced that it's on track to eliminate the Great Pacific Garbage Patch by 2034.

If it can get the necessary funds, that is. In a press release, the organization claimed that eliminating the patch once and for all would cost a whopping $7.5 billion — the "first time both a cost and a timeline has been placed on ridding the Pacific Ocean of the environmental hazard."

The Great Pacific Garbage Patch is a name given to an estimated 79,000 metric tons of plastic waste floating in the ocean in an area roughly twice the size of Texas. The Ocean Cleanup has made it its mission to fish it out of the water piece by piece.

"Today’s announcement is clear: clean oceans can be achieved in a manageable time and for a clear cost," said founder and CEO Boyan Slat in a statement. "Through the hard work of the past ten years, humanity has the tools needed to clean up the ocean."

Plastic Beach
Researchers have found that the patch is growing rapidly, making it a massively difficult problem to deal with.

To make a dent, the Ocean Cleanup has been developing new technologies to fish this plastic out of the water. Its latest iteration, called System 03 consists of a floating barrier roughly 1.4 miles long, which is towed between two vessels.

So far, the nonprofit claims it has fished out a million pounds of trash from the patch, a mere 0.5 percent of its total. But within a decade, it says, it could ramp up its operations to get rid of it in its entirety.

Next year, the company will focus its efforts on establishing a "hotspot" map of areas in the ocean with "intense plastic accumulation."

While $7.5 billion may sound like a lot, it's less than one month's worth of Apple's profits last year, or a sixth of the bonus Tesla shareholders awarded to CEO Elon Musk.

The Ocean Cleanup also put that price tag into perspective, pointing out that the annual spend on Halloween decorations in the US alone was $10.6 billion. A mere one percent of the "annual net profits of the world's plastic producers" is also just $7.2 billion.

Better yet, if the nonprofit's latest technological ideas come to fruition, Slat suggests we could even clear the patch in just five years at a cost of just $4 billion.

A new visitor from the outer Solar System, comet C/2025 R2 (SWAN) also known as SWAN25B was only discovered late last week, on September 11. That's just a day before the comet reached perihelion, its closest approach to the Sun.

First spotted by Vladimir Bezugly in images from the SWAN instrument on the sun-staring SOHO spacecraft, the comet was surprisingly bright but understandably difficult to see against the Sun's glare. Still close to the Sun on the sky, the greenish coma and tail of C/2025 R2 (SWAN) are captured in this telescopic snapshot from September 17.

Spica, alpha star of the constellation Virgo, shines just beyond the upper left edge of the frame while the comet is about 6.5 light-minutes from planet Earth. Near the western horizon after sunset and slightly easier to see in binoculars from the southern hemisphere, this comet SWAN will pass near Zubenelgenubi, alpha star of Libra, on October 2. C/2025 R2 (SWAN) is scheduled to make its closest approach to our fair planet around October 20.

Image Credit & Copyright: Team Ciel Austral

A new investigation of Saturn’s upper atmosphere, carried out with the James Webb Space Telescope (JWST), has uncovered strikingly unusual features never before observed on any planet in the Solar System. The findings were unveiled last week by Professor Tom Stallard of Northumbria University during the EPSC-DPS2025 Joint Meeting in Helsinki.

“This opportunity to use JWST was the first time we have ever been able to make such detailed near-infrared observations of Saturn’s aurora and upper atmosphere. The results came as a complete surprise,” said Professor Stallard.

This video shows how the structures observed in Saturn’s ionosphere and stratosphere relate to one another. Starting with the aurora at 1100 km, the brightness is increased to reveal the dark bead-like features. The video then fades into the star-arm shapes within the underlying 600 km layer. The darkest beads in the ionosphere appear to line up with the strongest arm underneath it, but it is not clear if this is coincidental, or if it suggests coupling between Saturn’s lowest and highest layers of the atmosphere. Credit: NASA/ESA/CSA/Stallard et al 2025.

Beads, Stars, and the Unexpected Patterns
“We anticipated seeing emissions in broad bands at the various levels. Instead, we’ve seen fine-scaled patterns of beads and stars that, despite being separated by huge distances in altitude, may somehow be interconnected – and may also be linked to the famous hexagon deeper in Saturn’s clouds. These features were completely unexpected and, at present, are completely unexplained.”

The discovery was made by an international collaboration of 23 researchers from the UK, US, and France, who observed Saturn for a continuous 10-hour stretch on November 29, 2024, while the planet rotated under JWST’s gaze.

Although the building blocks of life such as hydrogen and oxygen appear stable to us, many theories of physics predict that they are actually just tremendously long-lived, with the particles found in their nuclei slowly, but ultimately decaying.

To investigate this idea, researchers have been hunting for evidence of this decay by looking for faint signals of decaying protons in Japan's Super-Kamiokande observatory.

So far, no definitive signals of proton decay have emerged, implying that if the proton does decay, it probably has a lifetime exceeding 1033 years—that's 10 with 32 zeros behind it.

But the Japanese observatory can't see every type of proton decay: if the decay fragments are too low in energy, they would be invisible to the detector.

In a recent study published in Physical Review Letters, Virginia physicists showed that two other observatories—the Jiangmen Underground Neutrino Observatory (JUNO) and the Deep Underground Neutrino Experiment (DUNE)—should soon be able to see these lower-energy proton decays thanks to their complementary detector designs.

"Lowering the detection threshold will open a much wider window to include decays that might have fallen through the cracks in earlier searches," said Ian Shoemaker, associate professor in the Department of Physics and study co-author.

Working with Julian Heeck from the University of Virginia, Shoemaker found that proton decay experiments can also be sensitive to protons decaying anywhere inside Earth, if they decay into new elementary particles.

Most intriguingly, said Shoemaker, one of these new particles could be the long-sought-after "sterile neutrino," which would finally allow scientists to understand the origin of neutrino mass.

"Our initial exploration of these signatures hints at many novel exciting opportunities for theoretical and experimental work that could lead to the groundbreaking discovery of new physics," Shoemaker said.

In May 2010, Japan’s Aerospace Exploration Agency (JAXA) launched the "Planet C" spacecraft – also known as "Akatsuki" or the Venus Climate Orbiter – towards Earth's "sister planet". The early stages of the mission did not go as planned. On its approach to Venus in December 2010, the spacecraft was supposed to decelerate with a controlled burn to place it in orbit. But due to a malfunction with the main engine, the planned 12-minute burn lasted just three, and Planet C shot well past its target instead.

That could have been the end of it, but JAXA was able to use the spacecraft's auxiliary reaction control system to adjust its trajectory and slow it down as it orbited the Sun. Five years later, the space agency announced that they had finally put the probe around Venus, and work could begin.

“As a result of measuring and calculating the Akatsuki’s orbit after its thrust ejection, the orbiter is now flying on the elliptical orbit at the periapsis altitude of about 400 kilometers and apoapsis altitude of about 440,000 kilometers from Venus," the space agency announced in 2015. "The orbit period is 13 days and 14 hours. We also found that the orbiter is flying in the same direction as that of Venus’s rotation.”

Soon after that, the spacecraft began returning its first photographs and data, helping us to study the atmosphere of Venus. Though not in its original planned orbit, the orbit it ended up in was advantageous.
...

"Communication with 'Akatsuki' was lost during operations near the end of April 2024, triggered by an incident in a control mode of lower-precision attitude maintenance for a prolonged period," JAXA explained in a statement.

"Although recovery operations were conducted to restore communication, there has been no luck so far. Considering the fact that the spacecraft has aged, well exceeding its designed lifetime, and was already in the late-stage operation phase, it has been decided to terminate operations."

Monday 20:19 CEST marked the September Equinox!

This image from eumetsat’s Meteosat-12 satellite, captured that morning, shows Earth on the equinox — when the terminator line runs from pole to pole, dividing the planet into equal halves of light and dark. From space, it appears as a strikingly vertical line.