NASA has unveiled 10 new astronaut candidates drawn from over 8,000 applicants. The diverse group includes four men and six women -- pilots, scientists, and medical professionals -- who will train for future missions to the ISS, the moon, and eventually Mars. CBS News reports: This is NASA's first astronaut class with more women than men. It includes six pilots with experience in high-performance aircraft, a biomedical engineer, an anesthesiologist, a geologist and a former SpaceX launch director. Among the new astronaut candidates is 39-year-old Anna Menon, a mother of two who flew to orbit in 2024 aboard a SpaceX Crew Dragon as a private astronaut on a commercial, non-NASA flight. [...]

The other members of the 2025 astronaut class are:
- Army Chief Warrant Officer 3 Ben Bailey, 38, a graduate of the Naval Test Pilot School with more than 2,000 hours flying more than 30 different aircraft, including recent work with UH-60 Black Hawk and CH-47F Chinook helicopters.
- Lauren Edgar, 40, who holds a Ph.D. in geology from the California Institute of Technology, with experience supporting NASA's Mars exploration rovers and, more recently, serving as a deputy principal investigator with NASA's Artemis 3 moon landing mission.
- Air Force Maj. Adam Fuhrmann, 35, an Air Force Test Pilot School graduate with more than 2,100 hours flying F-16 and F-35 jets. He holds a master's degree in flight test engineering.
- Air Force Maj. Cameron Jones, 35, another graduate of Air Force Test Pilot School as well as the Air Force Weapons School with more than 1,600 hours flying high-performance aircraft, spending most of his time flying the F-22 Raptor.
- Yuri Kubo, 40, a former SpaceX launch director with a master's in electrical and computer engineering who also competed in ultimate frisbee contests.
- Rebecca Lawler, 38, a former Navy P-3 Orion pilot and experimental test pilot with more than 2,800 hours of flight time, including stints flying a NOAA hurricane hunter aircraft. She was a Naval Academy graduate and was a test pilot for United Airlines at the time of her selection.
- Imelda Muller, 34, a former undersea medical officer for the Navy with a medical degree from the University of Vermont's Robert Larner College of Medicine; she was completing her residency in anesthesia at Johns Hopkins University School of Medicine in Baltimore at the time of her astronaut selection.
- Navy Lt. Cmdr. Erin Overcash, 34, a Naval Test Pilot School graduate and an experienced F/A-18 and F/A-18F Super Hornet pilot with 249 aircraft carrier landings. She also trained with the USA Rugby Women's National Team.
- Katherine Spies, 43, a former Marine Corps AH-1 attack helicopter pilot and a graduate of the Naval Test Pilot School with more than 2,000 hours flying time. She was director of flight test engineering for Gulfstream Aerospace Corp. at the time of her astronaut selection.

The Moon is rusting -- and it's Earth's fault. Nature: Scientists have found that oxygen particles blown from Earth to the Moon can turn lunar minerals into hematite, also known as rust. The discovery adds to researchers' growing understanding of the deep interconnection between Earth and the Moon -- and shows how the Moon keeps a geological record of those interactions, says Ziliang Jin, a planetary scientist at Macau University of Science and Technology in China. He and his colleagues reported their findings earlier this month in Geophysical Research Letters.

Most of the time, both Earth and the Moon are bathed in a stream of charged particles emanating from the Sun. But for around five days each month, Earth passes between the Sun and the Moon, blocking most of the flood of solar particles. During that time, the Moon is exposed mainly to particles that had been part of Earth's atmosphere before blowing into space -- a phenomenon known as Earth wind. That wind contains ions of various elements, including hydrogen, oxygen and nitrogen. When those charged particles hit the Moon, they can implant themselves into the upper layers of lunar soil and trigger chemical reactions.

iFixit's teardown of Apple's iPhone Air reveals a device dominated by its battery, which occupies approximately two-thirds of the internal space while critical components including the logic board cluster at the top. The battery matches the component used in Apple's iPhone Air MagSafe battery pack and can be swapped between devices.

The top-heavy component layout addresses the bendgate vulnerability that damaged logic boards in previous thin iPhone models when pressure was applied to the device's middle section. Despite the iPhone Air's thinner profile, iFixit awarded it a 7 out of 10 repairability score, citing reduced component layering that provides more direct access to the USB-C connector, battery, and other serviceable parts compared to standard iPhone models. The dual-entry system further contributes to the device's serviceability.

"Astronomers have spotted a quasi-moon near Earth," reports CNN, "and the small space rock has likely been hanging out near our planet unseen by telescopes for about 60 years, according to new research." The newly discovered celestial object, named 2025 PN7, is a type of near-Earth asteroid that orbits the sun but sticks close to our planet. Like our world, 2025 PN7 takes one year to complete an orbit around the sun...

The newly found 2025 PN7 is just one of a handful of known quasi-moons with orbits near our planet, including Kamo'oalewa, which is also thought to be an ancient lunar fragment. Kamo'oalewa is one of the destinations of China's Tianwen-2 mission launched in May, which aims to collect and return samples from the space rock in 2027. The Pan-STARRS observatory located on the Haleakala volcano in Hawaii captured observations of 2025 PN7 on August 29. Archival data revealed that the object has been in an Earth-like orbit for decades.

The quasi-moon managed to escape the notice of astronomers for so long because it is small and faint, said Carlos de la Fuente Marcos, a researcher on the faculty of mathematical sciences at the Complutense University of Madrid who recently authored a paper about the space rock. The paper was published on September 2 in the journal Research Notes of the American Astronomical Society, which is for timely non-peer-reviewed astronomical observations. The space rock swings within 186,000 miles (299,337 kilometers) of us during its closest pass of our planet, de la Fuente Marcos said.... "It can only be detected by currently available telescopes when it gets close to our planet as it did this summer," de la Fuente Marcos explained. "Its visibility windows are few and far between. It is a challenging object...."

Astronomers are still trying to figure out 2025 PN7's size. About 98 feet (30 meters) across is a reasonable estimate, de la Fuente Marcos said. It also has the potential to be 62 feet (19 meters) in diameter, according to EarthSky. The space rock is currently the smallest-known quasi-moon to have orbited near Earth, de la Fuente Marcos said.

A July combat training exercise involved a satellite dish-style antenna that "could fire enough electromagnetic energy to fry the satellite 22,000 miles away," reports the Washington Post. But "Instead, the salvo would be more covert — millisecond pulses of energy that would subtly disrupt the satellite's signals, which U.S. military forces were using to communicate in the Pacific Ocean." The goal was to disguise the strike as a garbled connection that could be easily remedied by securing a loose cable or a simple reboot, leaving U.S. service members frustrated without raising their suspicions. [And using less power "would make it harder for the Blue Team to track where the interference was coming from."] This is how the next war could start: invisible shots fired in space on the electromagnetic spectrum that could render U.S. fighter jets and aircraft carriers deaf and blind, unable to communicate. In this case, the "aggressors" targeting the U.S. satellite were not from China or Russia, but rather an elite squadron of U.S. Space Force Guardians mimicking how potential adversaries would act in a conflict that begins in orbit... Involving more than 700 service members and spanning 50 million square miles and six time zones, the training exercise, called Resolute Space, was observed firsthand exclusively by The Washington Post.
The article describes leadership at the U.S. Space Force "still honing their mission while jousting with adversaries, such as China, that are moving quickly and conducting combat-like operations in orbit... While the Space Force continues to evolve, many defense analysts and some members of Congress fear the United States has already ceded its dominance in space to China and others." With a budget of just $40 billion, the relatively tiny Space Force makes up just about 4 percent of the Defense Department's budget and less than 1 percent of its personnel. It has more than 15,000 Guardians, which also includes several thousand civilians. By comparison, the Army has nearly 1 million soldiers. The Space Force has been squeezed under the department of the Air Force and struggled to distinguish itself from the other branches...

China, Russia and others have demonstrated that they can take out or interfere with the satellites operated by the Pentagon and intelligence agencies that provide the nation's missile warning and tracking, reconnaissance and communications. China in particular has moved rapidly to build an arsenal of space-based weapons... [R]ecently, several of China's satellites have engaged in what Space Force officials have called "dogfighting," jousting with U.S. satellites at high speeds and close ranges.

An anonymous reader shared this report from the Washington Post: Finnish tech firm Bluefors, a maker of ultracold refrigerator systems critical for quantum computing, has purchased tens of thousands of liters of Helium-3 from the moon — spending "above $300 million" — through a commercial space company called Interlune. The agreement, which has not been previously reported, marks the largest purchase of a natural resource from space.

Interlune, a company founded by former executives from Blue Origin and an Apollo astronaut, has faced skepticism about its mission to become the first entity to mine the moon (which is legal thanks to a 2015 law that grants U.S. space companies the rights to mine on celestial bodies). But advances in its harvesting technology and the materialization of commercial agreements are gradually making this undertaking sound less like science fiction. Bluefors is the third customer to sign up, with an order of up to 10,000 liters of Helium-3 annually for delivery between 2028 and 2037...

Helium-3 is lighter than the Helium-4 gas featured at birthday parties. It's also much rarer on Earth. But moon rock samples from the Apollo days hint at its abundance there. Interlune has placed the market value at $20 million per kilogram (about 7,500 liters). "It's the only resource in the universe that's priced high enough to warrant going out to space today and bringing it back to Earth," said Rob Meyerson [CEO of Interlune and former president of Blue Origin]...

[H]eat, even in small doses, can cause qubits to produce errors. That's where Helium-3 comes in. Bluefors makes the cooling technology that allows the computer to operate — producing chandelier-type structures known as dilution refrigerators. Their fridges, used by quantum computer leader IBM, contain a mixture of Helium-3 and Helium-4 that pushes temperatures below 10 millikelvins (or minus-460 degrees Fahrenheit)... Existing quantum computers have been built with more than a thousand qubits, he said, but a commercial system or data center would need a million or more. That could require perhaps thousands of liters of Helium-3 per quantum computer. "They will need more Helium-3 than is available on planet Earth," said Gary Lai [a co-founder and chief technology officer of Interlune, who was previously the chief architect at Blue Origin]. Most Helium-3 on Earth, he said, comes from the decay of tritium (an isotope of hydrogen) in nuclear weapons stockpiles, but between 22,000 and 30,000 liters are made each year...

"We estimate there's more than a million metric tons of Helium-3 on the moon," Meyerson said. "And it's been accumulating there for 4 billion years." Now, they just need to get it.
Interlune CEO Meyerson tells the post "It's really all about establishing a resilient supply chain for this critical material" — adding that in the long-term he could also see Helium-3 being used for other purposes including fusion energy.

"Betelgeuse may have competition for the most exciting star about to go nova near Earth," writes Space.com.

"Astronomers have discovered the secret of a strange star system that has baffled them for years, finding it contains a dead star about to erupt after overfeeding on a stellar companion." The supernova explosion of this cosmic cannibal could be as bright as the moon, making it visible with the naked eye over Earth even in broad daylight. The system in question is the double star V Sagittae located around 10,000 light-years from Earth, containing a white dwarf stellar remnant and its victim companion star, which orbit each other roughly twice every Earth day. The new research and the revelation of this white dwarf's imminent catastrophic fate answer questions about V Sagittae that have lingered for 123 years...

White dwarfs represent the final stage of stars with masses around that of the sun, occurring when they run out of fuel for nuclear fusion... [W]hite dwarfs that have a stellar companion can get a second lease on life and a more conclusive and explosive end... [T]he stolen stellar material piles up on the surface of the white dwarf until it pushes this stellar remnant past the so-called Chandrasekhar limit of 1.4 solar masses. This is the mass limit that a stellar remnant has to exceed to trigger a supernova...

However, this team found something very different and extraordinary happening with the stellar material being stolen by the white dwarf in V Sagittae... This investigation revealed that there is a giant halo of gas comprised of material stolen from the companion star wrapped around both the cannibal white dwarf and its stellar victim... "The white dwarf cannot consume all the mass being transferred from its hot star twin, so it creates this bright cosmic ring," team member Pasi Hakala from the University of Turku said. "The speed at which this doomed stellar system is lurching wildly, likely due to the extreme brightness, is a frantic sign of its imminent, violent end."

"The matter accumulating on the white dwarf is likely to produce a nova outburst in the coming years, during which V Sagittae would become visible with the naked eye," Pablo Rodríguez-Gil from Spain's Instituto de Astrofisica de Canarias said. "But when the two stars finally smash into each other and explode, this would be a supernova explosion so bright it'll be visible from Earth even in the daytime."
The research was conducted with the Very Large Telescope (four individual telescopes high in the mountains of Chile) — and published last week in the journal Monthly Notices of the Royal Astronomical Society.

Fast Company ran a contrarian take about AI from entrepreneur/thought leader Faisal Hoque, who argues there's three AI bubbles.

The first is a classic speculative bubble, with asset prices soaring above their fundamental values (like the 17th century's Dutch "tulip mania"). "The chances of this not being a bubble are between slim and none..." Second, AI is also arguably in what we might call an infrastructure bubble, with huge amounts being invested in infrastructure without any certainty that it will be used at full capacity in the future. This happened multiple times in the later 1800s, as railroad investors built thousands of miles of unneeded track to serve future demand that never materialized. More recently, it happened in the late '90s with the rollout of huge amount of fiber optic cable in anticipation of internet traffic demand that didn't turn up until decades later. Companies are pouring billions into GPUs, power systems, and cooling infrastructure, betting that demand will eventually justify the capacity. McKinsey analysts talk of a $7 trillion "race to scale data centers" for AI, and just eight projects in 2025 already represent commitments of over $1 trillion in AI infrastructure investment. Will this be like the railroad booms and busts of the late 1800s? It is impossible to say with any kind of certainty, but it is not unreasonable to think so.

Third, AI is certainly in a hype bubble, which is where the promise claimed for a new technology exceeds reality, and the discussion around that technology becomes increasingly detached from likely future outcomes. Remember the hype around NFTs? That was a classic hype bubble. And AI has been in a similar moment for a while. All kinds of media — social, print, and web — are filled with AI-related content, while AI boosterism has been the mood music of the corporate world for the last few years. Meanwhile, a recent MIT study reported that 95% of AI pilot projects fail to generate any returns at all.
But the article ultimately argues there's lessons in the 1990s dotcom boom: that "a thing can be hyped beyond its actual capabilities while still being important... When valuations correct — and they will — the same pattern will emerge: companies that focus on solving real problems with available technology will extract value before, during, and after the crash." The winners will be companies with systematic approaches to extracting value — adopting mixed portfolios with different time horizons and risk levels, while recognizing organizational friction points for a purposeful (and holistic) integration.

"The louder the bubble talk, the more space opens for those willing to take a methodical approach to building value."

Thanks to Slashdot reader Tony Isaac for sharing the article.

Micro- and nanoplastic particles "infiltrate all systems of the body, including the brain," notes the University of Rhode Island, "where they can accumulate and trigger Alzheimer's-like conditions, according to a new study by researchers in the University of Rhode Island College of Pharmacy."

ScienceDaily shares the announcement: After a previous study that showed how microplastics can infiltrate all systems of the body — including the blood-brain barrier, which protects the brain from harmful substances as small as viruses and bacteria — University of Rhode Island pharmacy assistant professor Jaime Ross expanded the study to determine the brain health impacts of the plastic toxins. Her findings indicate that the accumulation of micro- and nanoplastics in the brain can lead to cognitive decline and even Alzheimer's disease, especially in those who carry genetic risk factors.

Ross' latest study, published recently in the journal Environmental Research Communications, examined mice that had been genetically modified to include the naturally occurring gene APOE4, a strong indicator of Alzheimer's risk making people 3.5 times more likely to develop the disease than those who carry the APOE3 variant of the gene that is passed from parents to offspring... Ross and her team exposed two groups of mice — one with the APOE4 variant and one with APOE3 — to micro- and nanoplastics in their drinking water over a period of three weeks. The tiny particles from polystyrene — among the most abundant plastics in the world, found in Styrofoam take-out containers, plastic cups and more — infiltrated the mice' organs, including the brain, as expected...

Ross' team then ran the mice through a series of tests to examine their cognitive ability, beginning with an open-field test, in which researchers put a mouse in a chamber and allow it to explore at will for 90 minutes. Ordinarily, a mouse will hug the walls, naturally attempting to hide from potential predators. However, after microplastic exposure, the APOE4 mice — especially the male mice — tended to wander more in the middle of the chamber and spend time in open space, leaving themselves vulnerable to predators...

The results are concerning enough to warrant further study into the cognitive decline caused by exposure to micro- and nanoplastics, which are among the most prominent environmental toxins to which people are routinely exposed... Ross is continuing to expand her research into the topic and encourages others to do so, in the hope of leading to better regulation of the toxins.

Sony has quietly introduced a revised PlayStation 5 Digital Edition that reduces internal storage from 1TB to 825GB while maintaining the same 499 Euro ($590) price point. The CFI-2116 revision has appeared on Amazon listings across Italy, Germany, Spain and France without official announcement from Sony.

The storage downgrade returns the console to its original 825GB capacity last seen in the launch PlayStation 5 before the Slim models increased storage to 1TB. Users lose approximately 175 of usable space in the new revision. Amazon Germany lists October 23 as the delivery date for units already available for purchase. The change affects only the Digital Edition while the disc version remains unchanged at 1TB. The revision follows Sony's September price increase of $50 across PlayStation 5 models citing economic conditions.

An anonymous reader quotes a report from Ars Technica: As Jonathan Roll neared completion of a master's degree in science and technology policy at Arizona State University three years ago, he did some research into recent developments by China's ascendant space program. He came away impressed by the country's growing ambitions. Now a full-time research analyst at the university, Roll was recently asked to take a deeper dive into Chinese space plans. "I thought I had a pretty good read on this when I was finishing grad school," Roll told Ars. "That almost everything needed to be updated, or had changed three years later, was pretty scary. On all these fronts, they've made pretty significant progress. They are taking all of the cues from our Western system about what's really galvanized innovation, and they are off to the races with it."

Roll is the co-author of a new report, titled "Redshift," on the acceleration of China's commercial and civil space activities and the threat these pose to similar efforts in the United States. Published on Tuesday, the report was sponsored by the US-based Commercial Space Federation, which advocates for the country's commercial space industry. It is a sobering read and comes as China not only projects to land humans on the lunar surface before the US can return, but also is advancing across several spaceflight fronts to challenge America. "The trend line is unmistakable," the report states. "China is not only racing to catch up -- it is setting pace, deregulating, and, at times, redefining what leadership looks like on and above Earth. This new space race will not be won with a single breakthrough or headline achievement, but with sustained commitment, clear-eyed vigilance, and a willingness to adapt over decades." "The key takeaway here is that there is an acceleration," said Dave Cavossa, president of the Commercial Spaceflight Federation. "The United States is still ahead today in a lot of areas in space. But the Chinese are advancing very quickly and poised to overtake us in the next five to 10 years if we don't do something."

"There's other things along the lines of budget battles," Cavossa said. "We don't want to see the US government scaling back its reliance on commercial satellite communications. We don't want to see them scaling back commercial remote sensing data buys, which is what they've been doing, or at least threatening to do. We want to make sure that there's a seamless transition from the ISS to commercial LEO destinations, and then a transition away from old programs of record to commercial transportation alternatives. That's what the US government can do and Congress can do here in the next couple of years to make sure that we stay ahead."

An anonymous reader quotes a report from Politico: In roughly six weeks, three California Democrats, a labor head and two ride-hailing leaders managed to pull off what would have been unthinkable just one year prior: striking a deal between labor unions and their longtime foes, tech giants Uber and Lyft. California lawmakers announced the agreement in late August, paving a path for ride-hailing drivers to unionize as labor wanted, in exchange for the state drastically reducing expensive insurance coverage mandates protested by the companies. It earned rare public support from Gov. Gavin Newsom and received final approval from state lawmakers this week.

The swift speed of the negotiating underscores what was at risk: the prospect of yet another nine-figure ballot measure campaign or lengthy court battle between two deeply entrenched sides, according to interviews with five people involved in the talks. Their accounts shed new light on how the deal came together: how the talks started, who was in the room, and the lengths they went to in order to turn around such a quick proposal -- from taking video meetings while recovering from surgery to the unexpected aid of one lawmaker's newborn baby.

"This was really quite fast," said Ramona Prieto, Uber's chief policy expert in Sacramento. "It wasn't like this was months of negotiating." The landmark proposal is only the second time a state has reached such a framework for Uber and Lyft drivers, after Massachusetts did so in 2024. And unlike Massachusetts, it came together without reverting to a ballot fight. California already saw its most expensive ballot measure effort to date in 2020, when Uber and Lyft spent more than $200 million backing an initiative to bar app-based workers from being classified as traditional employees, known as Proposition 22. Its passage sparked a legal challenge from labor leaders that wasn't resolved until July 2024, when California's Supreme Court affirmed the ballot measure's constitutionality. [...]

But the compromise still faces hurdles ahead. A recent lawsuit has raised fresh scrutiny of how the deal came together and what truly motivated it. Further criticism from those left out of the negotiating room is putting dealmakers on the defense as they try to sell it more widely. Plus, the final deal isn't what some labor leaders hoped when they first set out to strengthen drivers' rights in 2019. [...] And while the deal allows gig workers to unionize, that doesn't guarantee the necessary 10 percent of the state's 800,000 ride-hailing drivers actually will. Many who drive for Uber and Lyft do so part-time, and labor leaders acknowledge the challenge of organizing a disparate population that doesn't have a space to meet one another.

Lead times for high-capacity hard drives have exceeded 52 weeks as AI workloads drive unprecedented demand for warm storage that sits between fast SSDs and offline tape archives, according to TrendForce. Western Digital notified customers of price increases across its entire hard drive portfolio citing demand for "every capacity" in its product line.

The shortage stems from AI infrastructure requirements including training datasets, model checkpoints and inference logs that consume petabytes of storage space. These files are too large for primary SSD storage but must remain accessible for quick retrieval. Hard drive manufacturers have not significantly expanded production capacity in approximately a decade. Cloud service providers are evaluating QLC SSDs for cold data storage despite costs remaining four to five times higher per gigabyte than mechanical drives. Memory suppliers are developing SSD products specifically for this intermediate storage tier.

An anonymous reader shares a column: After nearly 30 years of USB-A connectivity, the market is now transitioning to the convenient USB-C standard, which makes sense given that it supports higher speeds, display data, and power delivery. The symmetrical connection is also smaller and more user-friendly, as it's reversible and works with smartphones and tablets. I get that USB-C is inevitable, but tech brands should realize that the ubiquitous USB-A isn't going anywhere soon and stop removing the ports we need to run our devices.

[...] It's premature for brands to phase out USB-A when peripheral brands are still making compatible products in 2025. For example, Logitech's current wireless pro gaming mice connect using a USB-A Lightspeed dongle, and most Seagate external drives still use USB-A as their connection method. The same can be said for other memory sticks, keyboards, wireless headsets, and other new devices that are still manufactured with a USB-A connection.

I have a gaming laptop with two USB-A and USB-C ports, and it's a constant struggle to connect all my devices simultaneously without needing a hub. I use the two USB-A ports for my mouse and wireless headset dongles, while a phone charging cable and portable monitor take up the USB-Cs. This setup stresses me out because there's no extra space to connect anything else without losing functionality.

Long-time Slashdot reader schwit1 shared this article from IEEE Spectrum: The world's largest airplane, when it's built, will stretch more than a football field from tip to tail. Sixty percent longer than the biggest existing aircraft, with 12 times as much cargo space as a 747, the behemoth will look like an oil tanker that's sprouted wings — aeronautical engineering at a preposterous scale.

Called WindRunner, and expected by 2030, it'll haul just one thing: massive wind-turbine blades. In most parts of the world, onshore wind-turbine blades can be built to a length of 70 meters, max. This size constraint comes not from the limits of blade engineering or physics; it's transportation. Any larger and the blades couldn't be moved over land, since they wouldn't fit through tunnels or overpasses, or be able to accommodate some of the sharper curves of roads and rails.

So the WindRunner's developer, Radia of Boulder, Colorado, has staked its business model on the idea that the only way to get extralarge blades to wind farms is to fly them there... Radia's plane will be able to hold two 95-meter blades or one 105-meter blade, and land on makeshift dirt runways adjacent to wind farms. This may sound audacious — an act of hubris undertaken for its own sake. But Radia's supporters argue that WindRunner is simply the right tool for the job — the only way to make onshore wind turbines bigger. Bigger turbines, after all, can generate more energy at a lower cost per megawatt. But the question is: Will supersizing airplanes be worth the trouble...?

Having fewer total turbines means a wind farm could space them farther apart, avoiding airflow interference. The turbines would be nearly twice as tall, so they'll reach a higher, gustier part of the atmosphere. And big turbines don't need to spin as quickly, so they would make economic sense in places with average wind speeds around 5 meters per second compared with the roughly 7 m/s needed to sustain smaller units. "The result...is more than a doubling of the acres in the world where wind is viable," says Mark Lundstrom [Radia's founder and CEO].
The executive director at America's National Renewable Energy Laboratory Foundation points out that one day blades could just be 3D-printed on-site — negating the need for the airplane altogether. But 3D printing for turbines is still in its earliest stages.

"Engineers from Ohio State University are developing a new way to power rocket engines," reports Gizmodo, "using liquid uranium for a faster, more efficient form of nuclear propulsion that could deliver round trips to Mars within a single year..." Nuclear propulsion uses a nuclear reactor to heat a liquid propellant to extremely high temperatures, turning it into a gas that's expelled through a nozzle and used to generate thrust. The newly developed engine concept, called the centrifugal nuclear thermal rocket (CNTR), uses liquid uranium to heat rocket propellant directly. In doing so, the engine promises more efficiency than traditional chemical rockets, as well as other nuclear propulsion engines, according to new research published in Acta Astronautica...

Traditional chemical engines produce about 450 seconds of thrust from a given amount of propellant, a measure known as specific impulse. Nuclear propulsion engines can reach around 900 seconds, with the CNTR possibly pushing that number even higher. "You could have a safe one-way trip to Mars in six months, for example, as opposed to doing the same mission in a year," Spencer Christian, a PhD student at Ohio State and leader of CNTR's prototype construction, said in a statement.

CNTR promises faster routes, but it could also use different types of propellant, like ammonia, methane, hydrazine, or propane, that can be found in asteroids or other objects in space.
"Some potential hurdles include ensuring that the methods used for startup, operation and shutdown avoid instabilities," according to the researchers' announcement, as well as "envisioning ways to minimize the loss of uranium fuel and accommodate potential engine failures."

But "This team's CNTR concept is expected to reach design readiness within the next five years..."

One of the worlds in the TRAPPIST-1 system, a mere 40 light-years away, just might be clad in a life-supporting atmosphere," reports ScienceAlert.

"In exciting new JWST observations, the Earth-sized exoplanet TRAPPIST-1e shows hints of a gaseous envelope similar to our own, one that could facilitate liquid water on the surface." Although the detection is ambiguous and needs extensive follow-up to find out what the deal is, it's the closest astronomers have come yet in their quest to find a second Earth... [T]he first step is finding exoplanets that are the right distance from their host star, occupying a zone where water neither freezes under extreme cold nor evaporates under extreme heat. Announced in 2016, the discovery of the TRAPPIST-1 system was immediately exciting for this reason. The red dwarf star hosts seven exoplanets that have a rocky composition (as opposed to gas or ice giants), several of which are bang in the star's habitable, liquid water zone...

Red dwarf stars are also much more active than Sun-like stars, rampant with flare activity that, scientists have speculated, may have stripped any planetary atmospheres in the vicinity. Closer inspections of TRAPPIST-1d, one of the other worlds in the star's habitable zone, have turned up no trace of an atmosphere. But TRAPPIST-1e is a little more comfortably located, at a slightly greater distance from the star... [T]he spectrum is consistent with an atmosphere rich in molecular nitrogen, with trace amounts of carbon dioxide and methane.

This is pretty tantalizing. Earth's atmosphere is roughly 78 percent molecular nitrogen. If the results can be validated, TRAPPIST-1e might just be the most Earth-like exoplanet discovered to date. That is not a small if, though. Luckily, more JWST observations are in the pipeline, and the researchers should be able to validate or rule out an atmosphere very soon.
After analyzing four transits of TRAPPIST-1e across TRAPPIST-1, "We are seeing two possible explanations," says astrophysicist Ryan MacDonald of the University of St Andrews in the UK. "The most exciting possibility is that TRAPPIST-1e could have a so-called secondary atmosphere containing heavy gases like nitrogen. "But our initial observations cannot yet rule out a bare rock with no atmosphere..."

Astrophysicist Ana Glidden of MIT led the second team interpreting the results, and says "We are really still in the early stages of learning what kind of amazing science we can do with Webb. It's incredible to measure the details of starlight around Earth-sized planets 40 light-years away and learn what it might be like there, if life could be possible there."

"We're in a new age of exploration that's very exciting to be a part of."

After its six-year journey to Saturn's moon Titan, Dragonfly's rotorcraft lander "will fly like a large drone," explains its web page, spending three years sampling multiple landing sites to characterize Titan's habitability and look for "precursors of the origin of life." "However, the project has undergone multiple replans impacting cost and schedule, resulting in a life-cycle cost increase of nearly $1 billion and over 2 years of delays," according to an announcement from NASA's Inspector General.

From the Inspector General's report: The cost increase and schedule delay were largely the result of NASA directing [Johns Hopkins University] Applied Physics Laboratory to conduct four replans between June 2019 and July 2023 early in Dragonfly's development. Justifications for these replans included the COVID-19 pandemic, supply chain issues, changes to accommodate a heavy-lift launch vehicle, projected funding challenges, and inflation."
But its higher-than-expected life-cycle cost over $3 billion "will continue to absorb an increasing proportion of the Planetary Science Division's total budget," meaning Dragonfly's increased cost (and "additional budget constraints") have "contributed to a gap of at least 12 years in New Frontiers [planetary science] mission launches, and will jeopardize future priorities outlined in the National Academies of Sciences, Engineering, and Medicine's (National Academies) decadal surveys."

Yet a NASA press release notes the mission "has cleared several key design, development and testing milestones and remains on track toward launch in July 2028." Its software-defined radio has been completed, and the part of the spectrometer which analyzes Titan's chemical components for "potentially biologically relevant" compounds (as well as structural and thermal testing of the lander's insulation).

"The mission is scheduled to launch in July 2028 on a SpaceX Falcon Heavy launch vehicle from NASA's Kennedy Space Center in Florida."

Thanks to long-time Slashdot reader schwit1 for spotting this news on the space/science blog "Behind the Black".

Physicists have confirmed Stephen Hawking's 1971 black hole area theorem with near-absolute certainty, thanks to gravitational waves from an exceptionally loud black hole collision detected by upgraded LIGO instruments. New Scientist reports: Hawking proposed his black hole area theorem in 1971, which states that when two black holes merge, the resulting black hole's event horizon -- the boundary beyond which not even light can escape the clutches of a black hole -- cannot have an area smaller than the sum of the two original black holes. The theorem echoes the second law of thermodynamics, which states that the entropy, or disorder within an object, never decreases.

Black hole mergers warp the fabric of the universe, producing tiny fluctuations in space-time known as gravitational waves, which cross the universe at the speed of light. Five gravitational wave observatories on Earth hunt for waves 10,000 times smaller than the nucleus of an atom. They include the two US-based detectors of the Laser Interferometer Gravitational-Wave Observatory (LIGO) plus the Virgo detector in Italy, KAGRA in Japan and GEO600 in Germany, operated by an international collaboration known as LIGO-Virgo-KAGRA (LVK).

The recent collision, named GW250114, was almost identical to the one that created the first gravitational waves ever observed in 2015. Both involved black holes with masses between 30 and 40 times the mass of our sun and took place about 1.3 billion light years away. This time, the upgraded LIGO detectors had three times the sensitivity they had in 2015, so they were able to capture waves emanating from the collision in unprecedented detail. This allowed researchers to verify Hawking's theorem by calculating that the area of the event horizon was indeed larger after the merger. The findings have been published in the journal Physical Review Letters.

Bending Spoons has entered a definitive agreement with Vimeo to purchase the video platform for $1.38 billion. From a report: Per the agreement, Bending Spoons will acquire Vimeo in an all-cash transaction and take Vimeo (VMEO), a public company, private. Vimeo shareholders will receive $7.85 per share in cash when the transaction closes.

[...] Vimeo, once a significant player in the streaming video space, has lost massive ground to other platforms, including YouTube, in recent years. Rather than fight a losing battle in the creator space, Vimeo has catered more toward business and enterprise users lately.