The Associated Press reports that "water may be more widespread and recent on Mars than previously thought, based on observations of Martian sand dunes by China's rover." A paper published in Science suggests thin films of water appeared on sand dunes sometime between 1.4 million years ago and as recently as 400,000 years ago — or perhaps even sooner: The finding highlights new, potentially fertile areas in the warmer regions of Mars where conditions might be suitable for life to exist, though more study is needed...

Before the Zhurong rover fell silent, it observed salt-rich dunes with cracks and crusts, which researchers said likely were mixed with melting morning frost or snow as recently as a few hundred thousand years ago... Conditions during that period were similar to now on Mars, with rivers and lakes dried up and no longer flowing as they did billions of years earlier...

The rover did not directly detect any water in the form of frost or ice. But Qin said computer simulations and observations by other spacecraft at Mars indicate that even nowadays at certain times of year, conditions could be suitable for water to appear... Small pockets of water from thawing frost or snow, mixed with salt, likely resulted in the small cracks, hard crusty surfaces, loose particles and other dune features like depressions and ridges, the Chinese scientists said.
Space.com explains exactly how the discovery was confirmed: The laser-induced breakdown spectrometer (MarSCoDe) instrument onboard the rover zapped sand grains into millimeter-sized particles. Their chemical makeup revealed hydrated minerals like sulfates, silica, iron oxide and chlorides... Researchers say water vapor traveled from Martian poles to lower latitudes like Zhurong's spot a few million years ago, when the planet's polar ice caps released high amounts of water vapor, thanks to a different tilt that had Mars' poles pointed more directly toward the sun. Frigid temperatures on the wobbling planet condensed the drifting vapor and dropped it as snow far from the poles, according to the latest study.

Mars' tilt changes over a 124,000-year cycle, so "this offers a replenishing mechanism for vapor in the atmosphere to form frost or snow at low latitudes where the Zhurong rover has landed," Qin told Space.com. But "no water ice was detected by any instrument on the Zhurong rover." Instead, in the same way that salting roads on Earth melts icy patches during storms, salts in Martian sand dunes warmed the fallen snow and thawed it enough to form saltwater. The process also formed minerals such as silica and ferric oxides, which Zhurong spotted, researchers say. The saltwater, however, didn't stay around for long. Temperatures on Mars swing wildly and spike in the mornings between 5 a.m. and 6 a.m., so the saltwater evaporated and left behind salt and other newly formed minerals that later seeped between the dune's sand grains, cementing them to form a crust, according to the study...

"The phenomenon was documented at one site, but it should be applicable to a fairly large fraction of Mars' surface at similar latitudes," Manasvi Lingam, an assistant professor of astrobiology at the Florida Institute of Technology who wasn't involved in the new research, told Space.com.
Since the rover found water activity on (and in) salty Martian dunes, the researchers now suggest future missions search for salt-tolerant microbes , and are raising the possibility of "extant life on Mars."

"Earth's magnetic environment is filled with a symphony of sound that we cannot hear," NASA wrote this month. When solar winds approach earth, "it causes the magnetic field lines and plasma around Earth to vibrate like the plucked strings of a harp, producing ultralow-frequency waves... a cacophonous operetta portraying the dramatic relationship between Earth and the Sun."

So NASA is now announcing "a new NASA-funded citizen science project called HARP — or Heliophysics Audified: Resonances in Plasmas " that has "turned those once-unheard waves into audible whistles, crunches, and whooshes..." Or, as the Washington Post puts it, "NASA wants your help listening in on the universe."

From NASA's news release: In 2007, NASA launched five satellites to fly through Earth's magnetic "harp" — its magnetosphere — as part of the THEMIS mission (Time History of Events and Macroscale Interactions during Substorms). Since then, THEMIS has been gathering a bounty of information about plasma waves across Earth's magnetosphere. "THEMIS can sample the whole harp," said Michael Hartinger, a heliophysicist at the Space Science Institute in Colorado. "And it's been out there a long time, so it has collected a lot of data."

The frequencies of the waves THEMIS measures are too low for our ears to hear, however. So the HARP team sped them up to convert them to sound waves. By using an interactive tool developed by the team, you can listen to these waves and pick out interesting features you hear in the sounds... Preliminary investigations with HARP have already started revealing unexpected features, such as what the team calls a "reverse harp" — frequencies changing in the opposite way than what scientists anticipated...

"Data sonification provides human beings with an opportunity to appreciate the naturally occurring music of the cosmos," said Robert Alexander, a HARP team member from Auralab Technologies in Michigan. "We're hearing sounds that are literally out of this world, and for me that's the next best thing to floating in a spacesuit."

To start exploring these sounds, visit the HARP website.
"Think listening to years' worth of wave patterns is a job for artificial intelligence? Think again," writes the Washington Post. In a news release, HARP team member Martin Archer of Imperial College London says humans are often better at listening than machines. "The human sense of hearing is an amazing tool," Archer says. "We're essentially trained from birth to recognize patterns and pick out different sound sources. We can innately do some pretty crazy analysis that outperforms even some of our most advanced computer algorithms."

A NASA satellite that observed solar flares and helped scientists understand the sun's powerful bursts of energy will fall to Earth this week, almost 21 years after it was launched. CNN reports: The retired Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) spacecraft, which launched in 2002 and was decommissioned in 2018, is expected to reenter Earth's atmosphere Wednesday at approximately 9:30 p.m. ET, according to NASA. The spacecraft was equipped with an imaging spectrometer, which recorded the sun's X-rays and gamma rays. From its former perch in low-Earth orbit, the satellite captured images of high-energy electrons that carry a large part of the energy released in solar flares, NASA said.

Before RHESSI, no gamma-ray images or high-energy X-ray images had been taken of solar flares, and data from the spacecraft provided vital clues about the phenomena and their associated coronal mass ejections. [...] NASA said that the agency, along with the Department of Defense, would monitor the satellite's reentry into Earth's atmosphere.

A team of scientists led by Slava Turyshev of the Jet Propulsion Laboratory at the California Institute of Technology have proposed merging miniature satellite units with a solar energy process that would create a fast, inexpensive, lightweight mode of travel. Phys.Org reports: Solar sailing is a process by which the pressure generated by the sun's radiation is harnessed for propulsion. Recent innovations in this technology were demonstrated in a successful crowdfunded 2019 mission undertaken by the Planetary Society's LightSail-2 project. The researchers explain, "Solar sails obtain thrust by using highly reflective, lightweight materials that reflect sunlight to propel a spacecraft while in space. The continuous photon pressure from the sun provides thrust, eliminating the need for heavy, expendable propellants employed by conventional on-board chemical and electric propulsion systems, which limit mission lifetime and observation locations."

They say that sails are far less expensive than heavy equipment currently used for propulsion, and that the ever-present continuous solar photon pressure from the sun makes thrust available for a broad range of vehicular maneuvers, such as hovering or rapid orbital plane changes. Solar sails and miniaturization "have advanced in the past decade to the point where they may enable inspiring and affordable missions to reach farther and faster, deep into the outer regions of our solar system," the report says.

The researchers refer to the merging of these two technologies as the Sundiver Concept. "Fast, cost-effective and maneuverable sailcraft that may travel outside the ecliptic plane open new opportunities for affordable solar system exploration," the report states, "with great promise for heliophysics, planetary science, and astrophysics." With enhanced maneuverability, the spacecraft can easily deliver small payloads to multiple destinations if required, and can dock with related modular craft. The reliance on the sun and the miniaturization of the carrier, which requires no dedicated launch site, will prove to be significant cost savers, the researchers add: "A substantial reason for the high costs is our [current] reliance on slow and expensive chemical propulsion, operating at the limits of its capabilities, effectively rendering the current solar system exploration paradigm unsustainable. A new approach is needed."

"The abundant sun of northern Africa may soon power Europe's homes and businesses," reports the Washington Post, "as European leaders consider connecting massive North African solar projects to undersea power cables to free their continent from Russian energy." The projects would take advantage of the climate quirk that one side of the Mediterranean is far drearier and cloudier than the other, although Europe and North Africa are geographically close. Abundant desert land also makes North African megaprojects far easier than in Europe, where open spaces tend to be agricultural or mountainous. The sudden need for alternative energy following Russia's invasion of Ukraine means that North African solar projects intended to send electricity to Europe are under active discussion, officials and experts say, as European leaders see a straightforward way to secure large amounts of green power. Past proposals have suggested that North African energy projects could meet as much as 15 percent of Europe's electricity demand.

The interest is especially high in Morocco, where undersea electrical cables already cross the 10-mile span to Spain at the Strait of Gibraltar. Moroccan leaders — who never had any fossil fuels to export — see a chance to promote their country as a renewable energy giant. Europe, meanwhile, wants to hit its ambitious climate goals and address its need for non-Russian energy at the same time. The result is a confluence of interests that could lead to a sudden leap forward for Europe's renewable energy uptake.

More broadly, it is a test for the concept of shipping green energy from sunny parts of the world to regions where the sun doesn't shine as brightly.... Europe alone doesn't have "the potential for the scale to create the dimensions of the renewable energy that we need," said European Commission Vice President Frans Timmermans, speaking alongside Moroccan Foreign Minister Nasser Bourita.
The article cites estimates from the International Renewable Energy Agency that North Africa's "installable capacity" is 2,792 gigawatts of solar power and 223 gigawatts of wind power. Laura El-Katiri, a fellow at the European Council on Foreign Relations who specializes in North African renewable energy, writes that could generate more than two and a half times Europe's 2021 electricity output.

The official in charge of a secretive Pentagon effort to investigate unexplained aerial incursions has co-authored an academic paper that presents an out-of-this-world theory: Recent objects could actually be alien probes from a mothership sent to study Earth. Politico reports: In a draft paper dated March 7 (PDF), Sean Kirkpatrick, head of the Pentagon's All-domain Anomaly Resolution Office, and Harvard professor Avi Loeb teamed up to write that the objects, which appear to defy all physics, could be "probes" from an extraterrestrial "parent craft." It's unusual for government officials, especially those involved in the nascent effort to collect intelligence on recent sightings, to discuss the possibility of extraterrestrial life, although top agency officials don't rule it out when asked. After Loeb posted it online, the paper gained notoriety from a post on Military Times and has also circulated among science-focused news outlets.

More than half of the five-page paper is devoted to discussing the possibility that the unexplained objects DoD is studying could be the "probes" in the mothership scenario, including most of the page-long introduction. One section is titled: "The Extraterrestrial Possibility" and another "Propulsion Methods." Kirkpatrick's involvement in the academic paper demonstrates that the Pentagon is open to scientific debate of the origins of UFOs, an important signal to send to the academic world, experts said. But they add that his decision to attach his name to a theory considered in most academic circles to be highly unsubstantiated also raises questions about AARO's credibility.

The paper explains that interstellar objects such as the cigar-shaped "Oumuamua" that scientists spotted flying through the galaxy in 2017 "could potentially be a parent craft that releases many small probes during its close passage to Earth." The paper goes on to compare the probes to "dandelion seeds" that could be separated from the parent craft by the sun's gravitational force. It examines the physics of how the smaller craft could move through the Earth's atmosphere to reach the surface, where they could be spotted by humans. The paper notes that the "probes" could use starlight to "charge their batteries" and the Earth's water as fuel. It also speculates on the motive for aliens to send exploratory probes to Earth. "What would be the overarching purpose of the journey? In analogy with actual dandelion seeds, the probes could propagate the blueprint of their senders," the authors write. "As with biological seeds, the raw materials on the planet's surface could also be used by them as nutrients for self-replication or simply scientific exploration."

The European Space Agency's Juice probe has blasted off on a landmark mission to Jupiter's moons, rising on a plume of white from its launchpad in Kourou, French Guiana, on the north-eastern shoulder of South America. From a report: The mission, which was delayed for 24 hours after lightning threatened to strike on Thursday, intends to uncover the secrets of Jupiter's Great Red Spot, its enormous polar auroras, and how its mighty magnetic field shapes conditions on the gas giant's nearby moons. It is the moons themselves that are the main attraction. Despite the frigid conditions that prevail, nearly half a billion miles from the sun, Juice will visit three of Jupiter's moons -- Europa, Callisto and Ganymede -- which harbour deep liquid water oceans beneath their icy surfaces.

The discovery of sub-surface saltwater oceans on Jupiter's moons has pushed them high up the list of solar system venues to explore for signs of life and habitability. If hydrothermal vents -- found on ocean floors all over Earth -- exist on the Jovian moons, they may provide enough warmth for life to thrive in the darkness. "I'm so thrilled to see Juice finally on its way," said Prof Andrew Coates, from the UCL Mullard Space Science Laboratory, who helped build two instruments on Juice called Pep and Janus. "This is an excellent mission to look at habitability of Jupiter's moons."

A NASA probe sent to observe Jupiter's swarm of asteroids recently caught the first glimpse of its rocky targets, capturing deep-space images of four of the mysterious Trojans. Gizmodo reports: The Lucy spacecraft used its highest resolution imager, L'LORRI (Lucy LOng Range Reconnaissance Imager), to photograph four Trojan asteroids during a two-day period from March 25 to 27, NASA announced on Thursday. The first asteroids to be seen by Lucy are: Eurybates, Polymele, Leucus, and Orus. Those four are part of two large groups of rocky bodies that lead and follow Jupiter as it orbits the Sun. Lucy is still a long way from reaching its asteroid targets, which are currently about 330 million miles (530 million kilometers) away from the probe. That's more than three times the average distance between Earth and the Sun, according to NASA.

The initial set of images are the first in a series of observations to measure how the Trojan asteroids reflect light when seen from a higher angle than ground-based observations, according to NASA. The images will then help NASA decide on exposure times to use for Lucy's close-up observations of the asteroids.

The 2019 release of the first image of a black hole was hailed as a significant scientific achievement. But truth be told, it was a bit blurry -- or, as one astrophysicist involved in the effort called it, a "fuzzy orange donut." Scientists on Thursday unveiled a new and improved image of this black hole -- a behemoth at the center of a nearby galaxy -- mining the same data used for the earlier one but improving its resolution by employing image reconstruction algorithms to fill in gaps in the original telescope observations. From a report: Hard to observe by their very nature, black holes are celestial entities exerting gravitational pull so strong no matter or light can escape. The ring of light -- that is, the material being sucked into the voracious object -- seen in the new image is about half the width of how it looked in the previous picture. There is also a larger "brightness depression" at the center - basically the donut hole - caused by light and other matter disappearing into the black hole.

The image remains somewhat blurry due to the limitations of the data underpinning it -- not quite ready for a Hollywood sci-fi blockbuster, but an advance from the 2019 version. This supermassive black hole resides in a galaxy called Messier 87, or M87, about 54 million light-years from Earth. A light year is the distance light travels in a year, 5.9 trillion miles (9.5 trillion km). This galaxy, with a mass 6.5 billion times that of our sun, is larger and more luminous than our Milky Way. Further reading: The Black Hole Image Data Was Spread Across 5 Petabytes Stored On About Half a Ton of Hard Drives (2019).

schwit1 shares a report from Inverse: On March 23, sky observers marveled at a gorgeous display of northern and southern lights. It was a reminder that when our Sun gets active, it can spark a phenomenon called "space weather." Aurorae are among the most benign effects of this phenomenon. At the other end of the space weather spectrum are solar storms that can knock out satellites. The folks at Starlink found that out the hard way in February 2022. On January 29 that year, the Sun belched out a class M 1.1 flare and related coronal mass ejection. Material from the Sun traveled out on the solar wind and arrived at Earth a few days later. On February 3, Starlink launched a group of 49 satellites to an altitude only 130 miles above Earth's surface. They didn't last long, and now solar physicists know why.

A group of researchers from NASA Goddard Space Flight Center and the Catholic University of America took a closer look at the specifics of that storm. Their analysis identified a mass of plasma that impacted our planet's magnetosphere. The actual event was a halo coronal mass ejection from an active region in the northeast quadrant of the Sun. The material traveled out at around 690 kilometers per second as a shock-driving magnetic cloud. Think of it as a long ropy mass of material writhing its way through space. As it traveled, it expanded and at solar-facing satellites -- including STEREO-A, which took a direct hit from it -- made observations. Eventually, the cloud smacked into Earth's magnetosphere creating a geomagnetic storm.

The atmosphere thickened enough that it affected the newly launched Starlink stations. They started to experience atmospheric drag, which caused them to deorbit and burn up on the way down. It was an expensive lesson in space weather and provided people on Earth with a great view of what happens when satellites fall back to Earth. It was also that could have been avoided if they'd delayed their launch to account for the ongoing threat.

Tesla will open a factory in Shanghai to produce its Megapack large-scale batteries, cementing another foothold for the U.S. company in China even as political and economic tensions between Washington and Beijing swirl. The Washington Post reports: Tesla said in a brief tweet on Sunday that its "Megafactory" in Shanghai will be capable of producing 10,000 Megapacks annually, an output equivalent to its other Megafactory in Lathrop, Calif., about 70 miles east of San Francisco. The company, which disbanded its public relations department, did not provide further details. Elon Musk, Tesla's chief executive, said in a tweet that the factory in Shanghai would "supplement" the production in California.

The Chinese factory will be built in Lingang, a suburban area of Shanghai where Tesla's vehicle factory is also located, according to Chinese media. Lu Yu, an official in Lingang, told local media that production could start as soon as the second quarter of 2024. The investment in China by Tesla comes after the coronavirus pandemic brought some supply chains to a halt as factories in China shut down amid strict "zero covid" protocols. With those setbacks still fresh in many executives' minds -- and amid concerns over alleged human rights violations and chilly relations between Washington and Beijing -- China has struggled to attract foreign investment since the pandemic.

The Megapacks differ from most of Tesla's consumer-focused offerings, like the electric vehicles it is widely known for, in that they are more a piece of energy infrastructure than a consumer product. The batteries are intended to store energy from renewable sources such as wind and solar, allowing energy to be drawn even when the sun isn't shining and the wind isn't blowing. Batteries like the Megapack are not yet widely implemented in the United States and purchases of the technology have mostly been kept under wraps. But the Megapack has been bought for Apple's renewable energy storage project in California, according to the Verge, and for a storage project outside Houston, Bloomberg first reported. A Megapack, Tesla says, "stores energy for the grid reliably and safely, eliminating the need for gas peaker plants and helping to avoid outages." Each pack can store enough energy to power 3,600 homes for an hour, Tesla says.

"The James Webb Space Telescope has captured a new stunning image of ice giant Uranus, with almost all its faint dusty rings on display," reports CNN: The image is representative of the telescope's significant sensitivity, NASA said, as the fainter rings have only been captured previously by the Voyager 2 spacecraft and the W.M. Keck Observatory on Maunakea in Hawaii. Uranus has 13 known rings, with 11 of them visible in the new Webb image. Nine rings are classified as the main rings, while the other two are harder to capture due to their dusty makeup and were not discovered until the Voyager 2 mission's flyby in 1986.

Two other, faint outer rings not shown in this latest image were discovered in 2007 from images taken by NASA's Hubble Space Telescope, and scientists hope Webb will capture them in the future.... "The JWST gives us the ability to look at both Uranus and Neptune in a completely new way because we have never had a telescope of this size that looks in the infrared," said Dr. Naomi Rowe-Gurney, a postdoctoral research scientist and solar system ambassador for the Webb space telescope at NASA Goddard Space Flight Center in Greenbelt, Maryland. "The infrared can show us new depths and features that are difficult to see from the ground with the atmosphere in the way and invisible to telescopes that look in visible light like Hubble."
"When Voyager 2 looked at Uranus, its camera showed an almost featureless blue-green ball in visible wavelengths," NASA explains. "With the infrared wavelengths and extra sensitivity of Webb we see more detail, showing how dynamic the atmosphere of Uranus really is." On the right side of the planet there's an area of brightening at the pole facing the Sun, known as a polar cap. This polar cap is unique to Uranus — it seems to appear when the pole enters direct sunlight in the summer and vanish in the fall; these Webb data will help scientists understand the currently mysterious mechanism. Webb revealed a surprising aspect of the polar cap: a subtle enhanced brightening at the center of the cap. The sensitivity and longer wavelengths of Webb's NIRCam may be why we can see this enhanced Uranus polar feature when it has not been seen as clearly with other powerful telescopes like the Hubble Space Telescope and Keck Observatory....

This was only a short, 12-minute exposure image of Uranus with just two filters. It is just the tip of the iceberg of what Webb can do when observing this mysterious planet.

An anonymous reader quotes a report from Bloomberg: Like so much in our modern era, Australia's high-stakes gamble on renewable energy starts with an Elon Musk Twitter brag. South Australia's last coal-fired power plant had closed, leaving the province of 1.8 million heavily reliant on wind farms and power imports from a neighboring region. When an unprecedented blackout caused much of the country to question the state's dependence on clean power, Tesla boasted -- on Twitter, of course -- that it had a solution: It could build the world's biggest battery, and fast. "@Elonmusk, how serious are you about this," replied Australian software billionaire and climate activist Mike Cannon-Brookes. "Can you guarantee 100MW in 100 days?" Musk responded: "Tesla will get the system installed and working 100 days from contract signature or it is free. That serious enough for you?"

To the astonishment of many, Tesla succeeded, and today, almost seven years later, that battery and more like it have become central to a shockingly rapid energy transition. By the middle of the next decade, major coal-fired power stations that generate about half of Australia's electricity will shut down. Gas-fired plants are being retired, too, and nuclear power is banned. That leaves solar, wind and hydro as the major options in the country's post-coal future. "It's really a remarkable story," said Audrey Zibelman, the former head of the Australian Energy Market Operator, or AEMO, the agency that runs the grid, and now an adviser to Alphabet's X. "Because we're not interconnected, we've had to learn to do it in a much more sophisticated way, where a lot of other countries will go once they've shut down their fossils."

It may be Australia's biggest power buildout since electrification in the 1920s and 30s. And, if successful, could be replicated across the 80% of the world's population that lives in the so-called sun belt -- which includes Latin America, Africa, the Middle East, India, southern China and Southeast Asia, says Professor Andrew Blakers, an expert in renewable energy and solar technology at Australian National University. That, in turn, would go a long way to halting climate change. Building battery storage is just one critical piece of the national project, and AEMO and others are worried coal plants will shut before there's enough additional electricity supply. Australia needs to increase its grid-scale wind and solar capacity ninefold by 2050. Connecting all that generation and storage into the grid will require more investment. Overall, the cost could be a staggering A$320 billion ($215 billion), and the money is starting to flow: Brookfield Asset Management Ltd., Macquarie Group Ltd., and billionaires Andrew Forrest and Cannon-Brookes have all been involved in headline-grabbing energy deals in recent months. New government support for renewables has also improved investor sentiment, according to the Clean Energy Investor Group, which includes project developers and financiers.

New submitter aphexx writes: A computer museum has revived and rebuilt a Cobalt RaQ 3 server appliance from the Y2K days of the internet. It's now online and accessible -- complete with an ancient CGI guestbook at http://raq.serialport.org/. There were thousands upon thousands of Cobalt RaQs and Qubes scattered across the globe in the 2000s, and I remember they were especially popular with ISPs. Judging from the guestbook comments, it looks like I'm not the only one that remembers their impact. Cobalt was acquired by Sun Microsystems in 2002 for a cool $2 billion, but discontinued the product line the following year.

Researchers have discovered one of the most massive black holes ever discovered, clocking in at around 32.7 billion times the mass of the sun. It's located in a galaxy at the center of a massive cluster named Abell 1201, some 2.7 billion light-years away. ScienceAlert reports: The new figure exceeds previous estimates by at least 7 billion solar masses, demonstrating the power of curved light for measuring masses with precision. One way we can find these black holes is looking for an effect called gravitational lensing. This occurs when space-time itself is warped by mass; imagine space-time as a rubber sheet, and the mass as a heavy weight on it. Any light traveling through that region of space-time has to travel along a curved path, and that can look very interesting to an observer watching from afar. [...]

The central galaxy, or brightest cluster galaxy (BCG) of Abell 1201, is a large, diffuse elliptical galaxy well-known as a strong gravitational lens. A galaxy far beyond the BCG appears alongside it as an elongated smear, like an eyebrow closely wrapped around its outskirts. This smear was discovered in 2003; in 2017, astronomers found a second, fainter smear, even closer to the galactic center. This implies, astronomers proposed, the presence of a very large black hole at the center of the BCG, but the data available was not detailed enough to resolve the central mass, or reveal more about what was in there.

[Researchers] not only had access to more recent observations, but devised the tools to understand them. They conducted hundreds of thousands of simulations of light moving through the Universe, altering the mass of the black hole at the galaxy's center, looking for results that replicate the lensing we observe with Abell 1021 BCG. All but one of their models preferred a massive black hole at the center of the galaxy; and the best fit for the mass of that black hole was 32.7 billion times the mass of the Sun. That pushes it well into ultramassive territory, black holes more massive than 10 billion Suns, and close to the theoretical upper limit for black hole masses of 50 billion Suns. The research has been published in the Monthly Notices of the Royal Astronomical Society.

Slashdot reader votsalo shares a report from the Guardian: Tiny glass beads strewn across the moon's surface contain potentially billions of tons of water that could be extracted and used by astronauts on future lunar missions, researchers say. The discovery is thought to be one of the most important breakthroughs yet for space agencies that have set their sights on building bases on the moon, as it means there could be a highly accessible source of not only water but also hydrogen and oxygen. "This is one of the most exciting discoveries we've made," said Mahesh Anand, a professor of planetary science and exploration at the Open University. "With this finding, the potential for exploring the moon in a sustainable manner is higher than it's ever been."

Anand and a team of Chinese scientists analyzed fine glass beads from lunar soil samples returned to Earth in December 2020 by the Chinese Chang'e-5 mission. The beads, which measure less than a millimeter across, form when meteoroids slam into the moon and send up showers of molten droplets. These then solidify and become mixed into the moon dust. Tests on the glass particles revealed that together they contain substantial quantities of water, amounting to between 300m and 270 billion tons across the entire moon's surface. "This is going to open up new avenues which many of us have been thinking about," said Anand. "If you can extract the water and concentrate it in significant quantities, it's up to you how you utilize it."

The latest research, published in Nature Geoscience, points to fine glass beads as the source of that surface water. Unlike frozen water lurking in permanently shaded craters, this should be far easier to extract by humans or robots working on the moon. "It's not that you can shake the material and water starts dripping out, but there's evidence that when the temperature of this material goes above 100C, it will start to come out and can be harvested," Anand said. The water appears to form when high-energy particles streaming from the sun -- the so-called solar wind -- strike the molten droplets. The solar wind contains hydrogen nuclei, which combine with oxygen in the droplets to produce water or hydroxyl ions. The water then becomes locked in the beads, but it can be released by heating the material. Further tests on the material showed the water diffuses in and out of the beads on the timeframe of a few years, confirming an active water cycle on the moon. According to Prof Sen Hu, a senior co-author of the study at the Chinese Academy of Sciences in Beijing, such impact glasses could store and release water on other airless rocks in the solar system.

The New York Times reports: Since January, the price of lithium has dropped nearly 20%, according to Benchmark Minerals, while sales of electric vehicles have soared. The price of cobalt, another important battery material, has fallen by more than half. Copper, essential to electric motors and batteries, has slipped by about 18%, at a time when U.S. mines and copper-rich countries such as Peru are struggling to increase production.

The price moves have confounded many analysts who predicted costs would stay high, or climb higher, slowing the transition to cleaner forms of transportation. Instead, the drop in commodity prices has made it easier for carmakers to cut prices for electric vehicles. This month, Tesla lowered the prices of its two most expensive cars, the Model S sedan and Model X sport utility vehicle, by thousands of dollars. That followed cuts in January by Tesla to its more affordable Model 3 and Model Y, and by Ford Motor to its Mustang Mach-E. The average price of an electric vehicle in the United States fell by $1,000 in February compared with January, according to Kelley Blue Book. "For electric vehicles, the major roadblock is cost," said Kang Sun, the CEO of Amprius Technologies, a young battery maker that this month announced plans for a factory in Colorado. The falling price of lithium, he said, "is going to promote EV sales."

Sun said he thinks prices could fall much further because demand for the metal has not risen as fast as some in the industry expected.... Ryan Melsert, CEO of American Battery Technology, attributed the recent decline in lithium prices to temporary factors like a seasonal slowdown in electric vehicle sales in China. "We expect to see very high prices for the foreseeable future," Melsert said. Vivek Chidambaram, the senior managing director for strategy at Accenture, the consulting firm, also expects the decline to be temporary. Lithium prices have fallen because sales of electric vehicles, while still brisk, are not growing as fast as automakers expected, he said. That has led suppliers to produce more than is needed.
The article notes America's Department of Energy is providing $3 billion in grants to create a domestic battery supply chain — partly because the supply of lithium has to increase 42-fold by 2050, according to the State Department's undersecretary for energy.

"We have to find additional sources of supply because 42 times is a lot," he tells the Times. "Right now, we don't have enough."

An anonymous reader quotes a report from Ars Technica: In 2025, United Airlines will fly an air taxi service between the downtown Vertiport Chicago and O'Hare International Airport, using electric vertical takeoff and landing aircraft it is purchasing from Archer Aviation. The Archer Midnight eVTOL aircraft will complete the route in about 10 minutes; according to local resident and Ars Managing Editor Eric Bangeman, that journey by car can take over an hour due to road construction. "Both Archer and United are committed to decarbonizing air travel and leveraging innovative technologies to deliver on the promise of the electrification of the aviation industry," said Michael Leskinen, president of United Airlines Ventures. "Once operational, we're excited to offer our customers a more sustainable, convenient, and cost-effective mode of transportation during their commutes to the airport."

If Chicago works out, United plans to add other airport-to-city "trunk routes," with "branch" routes between different communities coming later. The Archer Midnight has a range of 100 miles (160 km) and a top speed of 150 mph (241 km/h). If approved by the FAA, the Chicago air shuttle would be the first commercial eVTOL service to begin operating in North America. Asked about the cost, an Archer spokesperson told the Chicago Sun-Times that the company hopes to make the service competitive with Uber Black, so it will be roughly $100 for the trip.

Scientists have come up with a simple explanation for the strange movements of our solar system's first known visitor from another star. NPR reports: Now, though, in the journal Nature, two researchers say the answer might be the release of hydrogen from trapped reserves inside water-rich ice. That was the notion of Jennifer Bergner, an astrochemist with the University of California, Berkeley, who recalls that she initially didn't spend much time thinking about 'Oumuamua when it was first discovered. "It's not that closely related to my field. So I was like, this is a really intriguing object, but sort of moved on with my life," she says. Then she happened to attend a seminar that featured Cornell University's Darryl Seligman, who described the object's weirdness and what might account for it. One possibility he'd considered was that it was composed entirely of hydrogen ice. Others have suggested it might instead be composed of nitrogen ice.

Bergner wondered if it could just be a water-rich comet that got exposed to a lot of cosmic radiation. That radiation would release the hydrogen from the water. Then, if that hydrogen got trapped inside the ice, it could be released when the object approached the sun and began to warm up. Astronomers who observed 'Oumuamua weren't looking for that kind of hydrogen outgassing and, even if they had been, the amounts involved could have been undetectable from Earth. She teamed up with Seligman to start investigating what happens when water ice gets hit with radiation. They also did calculations to see if the object was large enough to store enough trapped hydrogen to account for the observed acceleration. And they looked to see how the structure of water ice would react to getting warmed, to see if small shifts could allow trapped gas to escape.

It turns out, this actually could account for the observed acceleration, says Bergner, who notes that the kind of "amorphous" water ice found in space has a kind of "fluffy" structure that contains empty pockets where gas can collect. As this water ice warms up, its structure begins to rearrange, she says, and "you lose your pockets for hiding hydrogen. You can form channels or cracks within the water ice as parts of it are sort of compacting." As the pockets collapse and these cracks form, the trapped hydrogen would leak out into space, giving the object a push, she says.

The U.S. Securities and Exchange Commission sued Justin Sun Wednesday on allegations of selling and airdropping unregistered securities, fraud and market manipulation. From a report: The SEC said in a press release it was suing Sun, the Tron Foundation, the BitTorrent Foundation and BitTorrent (now known as Rainberry) over the sale of tronix (TRX) and BitTorrent (BTT) tokens, which it described as unregistered crypto asset securities. The regulator further alleged that the defendants "fraudulently manipulat[ed]" TRX's secondary market through an "extensive wash trading" scheme. The agency is also suing Lindsay Lohan, Jake Paul, Soulja Boy, Lil Yachty, Ne-Yo, Akon and Michele Mason on illegal touting charges for their roles allegedly promoting TRX and BTT without disclosing they were paid to do so. The majority of these celebrities settled the charges.

Sun, who was named Grenada's ambassador to the World Trade Organization (WTO) last year, tried to artificially inflate TRX's trading volume through the wash trading scheme, the SEC alleged, by having his own employees "engage in more than 600,000 wash trades of TRX between two crypto asset trading platform accounts he controlled." Somewhere between 4.5 million and 7.4 million TRX was traded daily through these wash trades, the agency said.