After it began "peering into the distant universe" in 2022, NASA's James Webb Space Telescope "has discovered a rash of 'little red dots'," reports Science magazine. There's "hundreds of them, shining within the first billion years of the 13.8-billion-year-old universe, so small and red that they defied conventional explanation."

"Only in the past few months has a picture begun to emerge. The little red dots, astronomers say, may be an entirely new type of object: a colossal ball of bright, hot gas, larger than the Solar System, powered not by nuclear fusion, but by a black hole..." The objects, which some astronomers are calling "black hole stars," could be a missing link in the evolution of galaxies and help explain the rapid growth of supermassive black holes that lie at their hearts. "The big breakthrough of the past 6 months is actually the realization that we can throw out all these other models we've been playing with before," says astronomer Anna de Graaff of the Max Planck Institute for Astronomy... JWST couldn't resolve the dots into a recognizable shape, which meant they must have been tiny — less than 2% of the diameter of the Milky Way. "It was a mystery ... as to why they were so spatially compact," says Caitlin Casey of the University of Texas at Austin. An impossibly dense packing of stars would be needed to explain their brightness. "I was excited," Casey says...

For Mitch Begelman, a theoretical astrophysicist at the University of Colorado Boulder, the observations are a vindication. Earlier this month, he and a colleague posted a preprint on arXiv reviving a scenario for the formation of hypothetical "quasi-stars" that he and others had proposed 20 years ago. The first generation of stars, they calculated, could have grown to colossal size in the early universe, which was made up almost entirely of hydrogen, the raw material of stars. When a giant star ran out of fuel, they said, its core would have collapsed into a black hole, but the outer envelope of hydrogen was so dense it survived the blast, enclosing the newborn black hole. As the black hole chewed at its shroud of gas, the entire system glowed as a quasi-star larger than the Solar System. "That's what the quasi-star envelope is doing, it's force-feeding the black hole by pushing matter into it," Begelman says.

Given how common little red dots appear to be in the early universe, theorists are beginning to wonder whether this giant-ball-of-gas phase is an essential part of black hole growth and the evolution of galaxies. "We're probably looking at kind of a new phase of black hole growth that we didn't know about before," de Graaff says.
"If the red dots do turn out to be black hole stars, it will be precisely the sort of breakthrough expected from JWST — and the kind of discovery astronomers live for."

Thanks to Slashdot reader sciencehabit for sharing the news.

The vehicle "once led the Space Shuttle down the runway at Edwards Air Force Base," The Drive reported in 2022, noting it was won in an auction for $21,061 (beating 18 other bidders). "I just figured the NASA brand combined with Airsteam hip seemed like a can't lose combination," the buyer says now, in a listing for the vehicle on the on the automotive sales site Hemmings.com asking $199,000..

They're touting it as a priceless marketing/publicity prop — "a once in a lifetime opportunity" to own what was once an "onsite command center complete with communications and atmospheric monitoring... Imagine pulling into Burning Man driving this..." The seller points out it's the only custom-built "Airstream" trailer ever sold by NASA. (The others were crushed, except for one donated to the Kennedy museum.) But for this one "Apparently there was some miscommunication when the vehicle was decommissioned. It should have been offered to museums but the sales team did not know what it was.")

"Has only 8240 miles on it as driven from Ohio to California then around the Edwards base."

The seller apparently first tried listing it on eBay in May for $50,000. ("Reserve not met," says that listing page now. "Very well maintained, minor dings on exterior...")

Thanks to long-time Slashdot reader schwit1 for sharing the news.

An anonymous reader quotes a report from Ars Technica: Silicon Valley's AI talent war just reached a compensation milestone that makes even the most legendary scientific achievements of the past look financially modest. When Meta recently offered AI researcher Matt Deitke $250 million over four years (an average of $62.5 million per year)—with potentially $100 million in the first year alone -- it shattered every historical precedent for scientific and technical compensation we can find on record. [Meta CEO Mark Zuckerberg reportedly also offered an unnamed AI engineer $1 billion in compensation to be paid out over several years.] That includes salaries during the development of major scientific milestones of the 20th century. [...]

To put these salaries in a historical perspective: J. Robert Oppenheimer, who led the Manhattan Project that ended World War II, earned approximately $10,000 per year in 1943. Adjusted for inflation using the US Government's CPI Inflation Calculator, that's about $190,865 in today's dollars -- roughly what a senior software engineer makes today. The 24-year-old Deitke, who recently dropped out of a PhD program, will earn approximately 327 times what Oppenheimer made while developing the atomic bomb. [...] The Apollo program offers another striking comparison. Neil Armstrong, the first human to walk on the moon, earned about $27,000 annually -- roughly $244,639 in today's money. His crewmates Buzz Aldrin and Michael Collins made even less, earning the equivalent of $168,737 and $155,373, respectively, in today's dollars. Current NASA astronauts earn between $104,898 and $161,141 per year. Meta's AI researcher will make more in three days than Armstrong made in a year for taking "one giant leap for mankind." The report notes that the sums being offered to some of these AI researchers top even the most popular sports athletes. "The New York Times noted that Steph Curry's most recent four-year contract with the Golden State Warriors was $35 million less than Deitke's Meta deal (although soccer superstar Cristiano Ronaldo will make $275 million this year as the highest-paid professional athlete in the world)," reports Ars.

An anonymous reader quotes a report from The Guardian: A 515-mile (829km) lightning flash has set a new record as the longest ever identified. The World Meteorological Organization (WMO) confirmed the new world record for the flash registered on October 22, 2017, over the Great Plains in the US. It stretched from east Texas to near Kansas City, Missouri, roughly the distance between Paris and Venice. The previous record of 768km was also recorded in the Great Plains, a hotspot for severe thunderstorms, on April 29, 2020.

Since 2016, scientific advances in space-based mapping have allowed for lightning flashes to be measured over a broader space, allowing these long flashes to be recorded. This event was one of the first flashes to be documented using the National Oceanic and Atmospheric Administration's latest model of orbital satellite, known as a geostationary operational environmental satellite. [...] The advances in technology have also allowed for the recording of the greatest duration for a single lightning flash. The record is a flash that lasted 17.1 seconds during a thunderstorm over Uruguay and northern Argentina on June 18, 2020. The findings have been published in the journal Bulletin of the American Meteorological Society.

Australia's first domestically built rocket to attempt orbital launch crashed just 14 seconds after liftoff, though the company still declared the mission a success for igniting all engines and leaving the launch pad. The Associated Press reports: The rocket Eris, launched by Gilmour Space Technologies, was the first Australian-designed and manufactured orbital launch vehicle to lift off from the country and was designed to carry small satellites to orbit. It launched Wednesday morning local time in a test flight from a spaceport near the small town of Bowen in the north of Queensland state. In videos published by Australian news outlets, the 23-meter (75-foot) rocket appeared to clear the launch tower and hovered in the air before falling out of sight. Plumes of smoke were seen rising above the site. No injuries were reported. The company hailed the launch as a success in a statement posted to Facebook. A spokesperson said all four hybrid-propelled engines ignited and the maiden flight included 23 seconds of engine burn time and 14 seconds of flight. "Of course I would have liked more flight time but happy with this," wrote CEO Adam Gilmour on LinkedIn. Gilmour said in February that it was "almost unheard of" for a private rocket company to successfully launch to orbit on its first attempt.

"This is an important first step towards the giant leap of a future commercial space industry right here in our region," added Mayor Ry Collins of the local Whitsunday Regional Council.

India launched the $1.5 billion NISAR radar imaging satellite on Wednesday from the Satish Dhawan Space Centre, marking the first joint mission between NASA and the Indian Space Research Organisation. The satellite uses dual radar frequencies -- NASA's L-band and ISRO's S-band -- to detect Earth surface changes as small as one centimeter from its 747-kilometer orbit.

NISAR will map the entire planet every 12 days using a 240-kilometer-wide radar swath, providing data for climate monitoring and disaster response that will be freely available to users worldwide.

A new study analyzing distorted sound waves from the early universe suggests we may live in a massive cosmic void "with roughly 20% lower than the average density of matter," writes Indranil Banik in an article for The Conversation. "Not every physicist is convinced that this is the case. But our recent paper analyzing distorted sounds from the early universe, published in the Monthly Notices of the Royal Astronomical Society, strongly backs up the idea." Slashdot reader alternative_right shares an excerpt from the report: My colleagues and I previously argued that the Hubble tension might be due to our location within a large void. That's because the sparse amount of matter in the void would be gravitationally attracted to the more dense matter outside it, continuously flowing out of the void. In previous research, we showed that this flow would make it look like the local universe is expanding about 10% faster than expected. That would solve the Hubble tension. But we wanted more evidence. And we know a local void would slightly distort the relation between the BAO angular scale and the redshift due to the faster moving matter in the void and its gravitational effect on light from outside.

So in our new paper, Vasileios Kalaitzidis and I set out to test the predictions of the void model using BAO measurements collected over the last 20 years. We compared our results to models without a void under the same background expansion history. In the void model, the BAO ruler should look larger on the sky at any given redshift. And this excess should become even larger at low redshift (close distance), in line with the Hubble tension. The observations confirm this prediction. Our results suggest that a universe with a local void is about one hundred million times more likely than a cosmos without one, when using BAO measurements and assuming the universe expanded according to the standard model of cosmology informed by the CMB.

Our research shows that the ACDM model without any local void is in "3.8 sigma tension" with the BAO observations. This means the likelihood of a universe without a void fitting these data is equivalent to a fair coin landing heads 13 times in a row. By contrast, the chance of the BAO data looking the way they do in void models is equivalent to a fair coin landing heads just twice in a row. In short, these models fit the data quite well. In the future, it will be crucial to obtain more accurate BAO measurements at low redshift, where the BAO standard ruler looks larger on the sky -- even more so if we are in a void. The average expansion rate so far follows directly from the age of the universe, which we can estimate from the ages of old stars in the Milky Way. A local void would not affect the age of the universe, but some proposals do affect it. These and other probes will shed more light on the Hubble crisis in cosmology.

Measuring earth's position (or "geodesy") requires using telescopes that track radiation from distant black holes. Their signals "pass cleanly through the atmosphere and we can receive them during day and night and in all weather conditions," writes a senior scientist at the University of Tasmania.

But there's a problem... Radio waves are also used for communication on Earth — including things such as wifi and mobile phones... [A] few narrow lanes are reserved for radio astronomy. However, in previous decades the radio highway had relatively little traffic. Scientists commonly strayed from the radio astronomy lanes to receive the black hole signals. To reach the very high precision needed for modern technology, geodesy today relies on more than just the lanes exclusively reserved for astronomy.

In recent years, human-made electromagnetic pollution has vastly increased. When wifi and mobile phone services emerged, scientists reacted by moving to higher frequencies. However, they are running out of lanes. Six generations of mobile phone services (each occupying a new lane) are crowding the spectrum... Today, the multitude of signals are often too strong for geodetic observatories to see through them to the very weak signals emitted by black holes. This puts many satellite services at risk.

To keep working into the future — to maintain the services on which we all depend — geodesy needs some more lanes on the radio highway. When the spectrum is divided up via international treaties at world radio conferences, geodesists need a seat at the table. Other potential fixes might include radio quiet zones around our essential radio telescopes. Work is also underway with satellite providers to avoid pointing radio emissions directly at radio telescopes. Any solution has to be global. For our geodetic measurements, we link radio telescopes together from all over the world, allowing us to mimic a telescope the size of Earth. The radio spectrum is primarily regulated by each nation individually, making this a huge challenge.

But perhaps the first step is increasing awareness. If we want satellite navigation to work, our supermarkets to be stocked and our online money transfers arriving safely, we need to make sure we have a clear view of those black holes in distant galaxies — and that means clearing up the radio highway.

Star Wars creator George Lucas made his first Comic-Con appearance ever on Sunday. The Hollywood Reporter describes the scene: Thousands waited hours just to get inside, chanted "Lu-cas, Lu-cas!" while they waited, and then gave a wild standing ovation as the filmmaker took to the stage, introduced by rapper-actress Queen Latifah, and sat down next to filmmaker Guillermo del Toro and Star Wars production designer Doug Chiang. If the 6,500-strong crowd was disappointed he didn't talk a whiff about Star Wars or Indiana Jones, it wasn't shown, as cries of "I love you, George!" and waving lightsabers punctuated the air several times.

Lucas even received a standing ovation when he left the presentation, which was devoted entirely to the Lucas Museum of Narrative Art. He, along with museum board member and fellow art collector del Toro and Chiang, were there to not only give a first look at the museum but also make a case for the importance and validity of narrative art, which includes comic book art, as a vital form of expression... A video presentation showed interior looks at the museum — there are no right angles anywhere, Latifah underscored — as well as images that will be in the collection.

A cover of DC comic Mystery in Space, featuring the first appearance of Adam Strange; the first ever Flash Gordon comic strip; a cover of 1950s EC comic Tales from the Crypt; strips of Peanuts and Garfield; art ranging from Brian Bolland and Hellboy creator Mike Mignola to underground cartoonist Robert Crumb, Windsor McKay and Moebius; art of Astro Boy and Scrooge McDuck. But there were also images of art by Norman Rockwell, N.C. Wyeth and Frieda Kahlo. Also in the museum will be concept and storyboard art from Star Wars and Raiders of the Lost Ark by Ralph McQuarrie and Jim Steranko, as well as the props of starships and speeders from various Star Wars movies.

Chiang explained that comic art in particular had long been discounted. "It's not taken seriously," he said, and when he was younger was told, "You will outgrow it one day.... I'm so glad I didn't," he said, before driving home the point that one of the strengths of narrative art is that it's driven by story. "Story comes first. Art comes second...."

The museum, which has had its opening pushed back several times, is slated to open in 2026.
More Comic-Con highlights:

• Pennywise, the scary clown, returns in the upcoming HBO series "IT: Welcome to Derry"

• Comic-Con also saw a trailer for the new rock mockumentary Spinal Tap II: The End Continues. (Bassist Derek Smalls is now apparently into cryptocurrency...)

• Breaking Bad creator Vince Gilligan has a new series called Pluribus coming to AppleTV+, a nine-episode sci-fi drama starring Rhea Seehorn from Better Call Saul. (Watch its bizarre trailer here.)

California researchers planned a multimillion-dollar test of salt water-spraying equipment that could one day be used to dim the sun's rays — over a 3,900-square mile are off the west coasts of North America, Chile or south-central Africa. E&E News calls it part of a "secretive" initiative backed by "wealthy philanthropists with ties to Wall Street and Silicon Valley" — and a piece of the "vast scope of research aimed at finding ways to counter the Earth's warming, work that has often occurred outside public view." "At such scales, meaningful changes in clouds will be readily detectable from space," said a 2023 research plan from the [University of Washington's] Marine Cloud Brightening Program. The massive experiment would have been contingent upon the successful completion of the thwarted pilot test on the carrier deck in Alameda, according to the plan.... Before the setback in Alameda, the team had received some federal funding and hoped to gain access to government ships and planes, the documents show.

The university and its partners — a solar geoengineering research advocacy group called SilverLining and the scientific nonprofit SRI International — didn't respond to detailed questions about the status of the larger cloud experiment. But SilverLining's executive director, Kelly Wanser, said in an email that the Marine Cloud Brightening Program aimed to "fill gaps in the information" needed to determine if the technologies are safe and effective.âIn the initial experiment, the researchers appeared to have disregarded past lessons about building community support for studies related to altering the climate, and instead kept their plans from the public and lawmakers until the testing was underway, some solar geoengineering experts told E&E News. The experts also expressed surprise at the size of the planned second experiment....

The program does not "recommend, support or develop plans for the use of marine cloud brightening to alter weather or climate," Sarah Doherty, an atmospheric and climate science professor at the university who leads the program, said in a statement to E&E News. She emphasized that the program remains focused on researching the technology, not deploying it. There are no "plans for conducting large-scale studies that would alter weather or climate," she added.
"More than 575 scientists have called for a ban on geoengineering development," according to the article, "because it 'cannot be governed globally in a fair, inclusive, and effective manner.'" But "Some scientists believe that the perils of climate change are too dire to not pursue the technology, which they say can be safely tested in well-designed experiments... " "If we really were serious about the idea that to do any controversial topic needs some kind of large-scale consensus before we can research the topic, I think that means we don't research topics," David Keith, a geophysical sciences professor at the University of Chicago, said at a think tank discussion last month... "The studies that the program is pursuing are scientifically sound and would be unlikely to alter weather patterns — even for the Puerto Rico-sized test, said Daniele Visioni, a professor of atmospheric sciences at Cornell University. Nearly 30 percent of the planet is already covered by clouds, he noted.
Thanks to Slashdot reader fjo3 for sharing the news.

"A Chinese mega-constellation of communications satellites is facing serious delays," reports the South China Morning Post, "that could jeopardise its ambitions to compete with SpaceX's Starlink for valuable orbital resources." Only 90 satellites have been launched into low Earth orbit for the Qianfan broadband network — also known as the Thousand Sails Constellation or G60 Starlink — well short of the project's goal of 648 by the end of this year... Shanghai Yuanxin Satellite Technology, the company leading the project, plans to deploy more than 15,000 satellites by 2030 to deliver direct-to-phone internet services worldwide. To stay on track, Yuanxin — which is backed by the Shanghai municipal government — would have to launch more than 30 satellites a month to achieve its milestones of 648 by the end of 2025 for regional coverage and 1,296 two years later for global connectivity.
The New York Times reports that "the other megaconstellation, Guowang, is even farther behind. Despite plans to launch about 13,000 satellites within the next decade, it has 34 in orbit." A constellation has to launch half of its satellites within five years of successfully applying for its frequencies, and complete the full deployment within seven years, according to rules set by the International Telecommunication Union, a United Nations agency that allocates frequencies. The Chinese megaconstellations are behind on these goals. Companies that fail to hit their targets could be required to reduce the size of their megaconstellations.
Meanwhile SpaceX "has about 8,000 Starlink satellites in orbit and is expanding its lead every month," the Times writes, citing data from the U.S. Space Force and the nonprofit space-data group CelesTrak. (The Times has even created an animation showing Starlink's 8,000 satellites in orbit.) Researchers for the People's Liberation Army predict that the network will become "deeply embedded in the U.S. military combat system." They envision a time when Starlink satellites connect U.S. military bases and serve as an early missile-warning and interception network....

One of the major reasons for China's delay is the lack of a reliable, reusable launcher. Chinese companies still launch satellites using single-use rockets. After the satellites are deployed, rocket parts tumble back to Earth or become space debris... Six years after [SpaceX's] Falcon 9 began launching Starlink satellites, Chinese firms still have no answer to it... The government has tested nearly 20 rocket launchers in the "Long March" series.

Remember asteroid 2024 YR4 (which at one point had a 1 in 32 chance of hitting Earth, before ending up at "impact probability zero")? CNN reports that asteroid is now "zooming beyond the reach of telescopes on its orbit around the sun."

"But as scientists wait for it to reappear, its revised trajectory is now drawing attention to another possible target: the moon." The latest observations of the asteroid in early June, before YR4 disappeared from view, have improved astronomers' knowledge of where it will be in seven years by almost 20%, according to NASA. That data shows that even with Earth avoiding direct impact, YR4 could still pose a threat in late 2032 by slamming into the moon. ["The asteroid's probability of impacting the Moon has slightly increased from 3.8% to 4.3%," writes NASA, and "it would not alter the Moon's orbit."]
CNN calls the probabiliy "small but decent enough odds for scientists to consider how such a scenario might play out." The collision could create a bright flash that would be visible with the naked eye for several seconds, according to Wiegert, lead author of a recent paper submitted to the American Astronomical Society journals analyzing the potential lunar impact. The collision could create an impact crater on the moon estimated at 1 kilometer wide (0.6 miles wide), Wiegert said... It would be the largest impact on the moon in 5,000 years and could release up to 100 million kilograms (220 million pounds) of lunar rocks and dust, according to the modeling in Wiegert's study... Particles the size of large sand grains, ranging from 0.1 to 10 millimeters in size, of lunar material could reach Earth between a few days and a few months after the asteroid strike because they'll be traveling incredibly fast, creating an intense, eye-catching meteor shower, Wiegert said.

"There's absolutely no danger to anyone on the surface," Wiegert said. "We're not expecting large boulders or anything larger than maybe a sugar cube, and our atmosphere will protect us very nicely from that. But they're traveling faster than a speeding bullet, so if they were to hit a satellite, that could cause some damage...." Hundreds to thousands of impacts from millimeter-size debris could affect Earth's satellite fleet, meaning satellites could experience up to 10 years' equivalent of meteor debris exposure in a few days, Wiegert said... While a temporary loss of communication and navigation from satellites would create widespread difficulties on Earth, Wiegert said he believes the potential impact is something for satellite operators, rather than the public, to worry about.
"Any missions in low-Earth orbit could also be in the pathway of the debris, though the International Space Station is scheduled to be deorbited before any potential impact," reports CNN.

And they add that Wiegert also believes even small pieces of debris (tens of centimeters in size) "could present a hazard for any astronauts who may be present on the moon, or any structures they have built for research and habitation... The moon has no atmosphere, so the debris from the event could be widespread on the lunar surface, he added."

An anonymous reader quotes a report from 404 Media: Users from 4chan claim to have discovered an exposed database hosted on Google's mobile app development platform, Firebase, belonging to the newly popular women's dating safety app Tea. Users say they are rifling through peoples' personal data and selfies uploaded to the app, and then posting that data online, according to screenshots, 4chan posts, and code reviewed by 404 Media. In a statement to 404 Media, Tea confirmed the breach also impacted some direct messages but said that the data is from two years ago. Tea, which claims to have more than 1.6 million users, reached the top of the App Store charts this week and has tens of thousands of reviews there. The app aims to provide a space for women to exchange information about men in order to stay safe, and verifies that new users are women by asking them to upload a selfie.

"Yes, if you sent Tea App your face and drivers license, they doxxed you publicly! No authentication, no nothing. It's a public bucket," a post on 4chan providing details of the vulnerability reads. "DRIVERS LICENSES AND FACE PICS! GET THE FUCK IN HERE BEFORE THEY SHUT IT DOWN!" The thread says the issue was an exposed database that allowed anyone to access the material. [...] "The images in the bucket are raw and uncensored," the user wrote. Multiple users have created scripts to automate the process of collecting peoples' personal information from the exposed database, according to other posts in the thread and copies of the scripts. In its terms of use, Tea says "When you first create a Tea account, we ask that you register by creating a username and including your location, birth date, photo and ID photo."

After publication of this article, Tea confirmed the breach in an email to 404 Media. The company said on Friday it "identified unauthorized access to one of our systems and immediately launched a full investigation to assess the scope and impact." The company says the breach impacted data from more than two years ago, and included 72,000 images (13,000 selfies and photo IDs, and 59,000 images from app posts and direct messages). "This data was originally stored in compliance with law enforcement requirements related to cyber-bullying prevention," the email continued. "We have engaged third-party cybersecurity experts and are working around the clock to secure our systems. At this time, there is no evidence to suggest that current or additional user data was affected. Protecting our users' privacy and data is our highest priority. We are taking every necessary step to ensure the security of our platform and prevent further exposure."

Scientists using the largest-ever catalog of Type 1a supernovas -- cosmic explosions from white dwarf "vampire stars" -- have uncovered further evidence that dark energy may not be constant. While the findings are still preliminary, they suggest the mysterious force driving the universe's expansion could be weakening, which "would have ramifications for our understanding of how the cosmos will end," reports Space.com. From the report: By comparing Type 1a supernovas at different distances and seeing how their light has been redshifted by the expansion of the universe, the value for the rate of expansion of the universe (the Hubble constant) can be obtained. Then, that can be used to understand the impact of dark energy on the cosmos at different times. This story is fitting because it was the study of 50 Type 1a supernovas that first tipped astronomers off to the existence of dark energy in the first place back in 1998. Since then, astronomers have observed a further 2,000 Type 1a supernovas with different telescopes. This new project corrects any differences between those observations caused by different astronomical instruments, such as how the filters of telescopes drift over time, to curate the largest standardized Type 1a supernova dataset ever. It's named Union3.

Union3 contains 2,087 supernovas from 24 different datasets spanning 7 billion years of cosmic time. It builds upon the 557 supernovas catalogued in an original dataset called Union2. Analysis of Union3 does indeed seem to corroborate the results of DESI -- that dark energy is weakening over time -- but the results aren't yet conclusive. What is impressive about Union3, however, is that it presents two separate routes of investigation that both point toward non-constant dark energy. "I don't think anyone is jumping up and down getting overly excited yet, but that's because we scientists are suppressing any premature elation since we know that this could go away once we get even better data," Saul Perlmutter, study team member and a researcher at Berkeley Lab, said in a statement. "On the other hand, people are certainly sitting up in their chairs now that two separate techniques are showing moderate disagreement with the simple Lambda CDM model."

And when it comes to dark energy in general, Perlmutter says the scientific community will pay attention. After all, he shared the 2011 Nobel Prize in Physics for discovering this strange force. "It's exciting that we're finally starting to reach levels of precision where things become interesting and you can begin to differentiate between the different theories of dark energy," Perlmutter said.

An anonymous reader quotes a report from Phys.org: The mission team of NASA's Jupiter-orbiting Juno spacecraft executed a deep-space move in December 2023 to repair its JunoCam imager to capture photos of the Jovian moon Io. Results from the long-distance save were presented during a technical session on July 16 at the Institute of Electrical and Electronics Engineers Nuclear & Space Radiation Effects Conference in Nashville. JunoCam is a color, visible-light camera. The optical unit for the camera is located outside a titanium-walled radiation vault, which protects sensitive electronic components for many of Juno's engineering and science instruments. This is a challenging location because Juno's travels carry it through the most intense planetary radiation fields in the solar system. While mission designers were confident JunoCam could operate through the first eight orbits of Jupiter, no one knew how long the instrument would last after that. Throughout Juno's first 34 orbits (its prime mission), JunoCam operated normally, returning images the team routinely incorporated into the mission's science papers. Then, during its 47th orbit, the imager began showing hints of radiation damage. By orbit 56, nearly all the images were corrupted.

While the team knew the issue might be tied to radiation, pinpointing what was specifically damaged within JunoCam was difficult from hundreds of millions of miles away. Clues pointed to a damaged voltage regulator that was vital to JunoCam's power supply. With few options for recovery, the team turned to a process called annealing, where a material is heated for a specified period before slowly cooling. Although the process is not well understood, the idea is that heating can reduce defects in the material. Soon after the annealing process finished, JunoCam began cranking out crisp images for the next several orbits. But Juno was flying deeper and deeper into the heart of Jupiter's radiation fields with each pass. By orbit 55, the imagery had again begun showing problems.

"After orbit 55, our images were full of streaks and noise," said JunoCam instrument lead Michael Ravine of Malin Space Science Systems. "We tried different schemes for processing the images to improve the quality, but nothing worked. With the close encounter of Io bearing down on us in a few weeks, it was Hail Mary time: The only thing left we hadn't tried was to crank JunoCam's heater all the way up and see if more extreme annealing would save us." Test images sent back to Earth during the annealing showed little improvement in the first week. Then, with the close approach of Io only days away, the images began to improve dramatically. By the time Juno came within 930 miles (1,500 kilometers) of the volcanic moon's surface on Dec. 30, 2023, the images were almost as good as the day the camera launched, capturing detailed views of Io's north polar region that revealed mountain blocks covered in sulfur dioxide frosts rising sharply from the plains and previously uncharted volcanoes with extensive flow fields of lava. To date, the solar-powered spacecraft has orbited Jupiter 74 times. Recently, the image noise returned during Juno's 74th orbit.

"Scientists at the world's largest particle collider have observed a new class of antimatter particles breaking down at a different rate than their matter counterparts," reports Scientific American: [P]hysicists have been on the hunt for any sign of difference between matter and antimatter, known in the field as a violation of "charge conjugation-parity symmetry," or CP violation, that could explain why some matter escaped destruction in the early universe. [Wednesday] physicists at the Large Hadron Collider (LHC)'s LHCb experiment published a paper in the journal Nature announcing that they've measured CP violation for the first time in baryons — the class of particles that includes the protons and neutrons inside atoms.

Baryons are all built from triplets of even smaller particles called quarks. Previous experiments dating back to 1964 had seen CP violation in meson particles, which unlike baryons are made of a quark-antiquark pair. In the new experiment, scientists observed that baryons made of an up quark, a down quark and one of their more exotic cousins called a beauty quark decay more often than baryons made of the antimatter versions of those same three quarks... The matter-antimatter difference scientists observed in this case is relatively small, and it fits within predictions of the Standard Model of particle physics — the reigning theory of the subatomic realm. This puny amount of CP violation, however, cannot account for the profound asymmetry between matter and antimatter we see throughout space...

"We are trying to find little discrepancies between what we observe and what is predicted by the Standard Model," [says LHCb spokesperson/study co-author Vincenzo Vagnoni of the Italian National Institute of Nuclear Physics]. "If we find a discrepancy, then we can pinpoint what is wrong." The researchers hope to discover more cracks in the Standard Model as the experiment keeps running. Eventually LHCb should collect about 30 times more data than was used for this analysis, which will allow physicists to search for CP violation in particle decays that are even rarer than the one observed here.

So stay tuned for an answer to why anything exists at all.

"The distant reaches of the Solar System are still mysterious," writes ScienceAlert. "Not much sunlight pierces these regions, and there are strong hints that undiscovered objects lurk there. The objects that astronomers have discovered in these dim reaches are primordial, and their orbits suggest the presence of more undiscovered objects."

And now thanks to the giant 8.2-meter Subaru telescope at Hawaii's Mauna Kea Observatory, astronomers have discovered "a massive new solar system body located beyond the orbit of Pluto," reports Space.com. The weird elongated orbit of the object suggests that if "Planet Nine" exists, it is much further from the sun than thought, or it has been ejected from our planetary system altogether.

The strange orbit of the object, designated 2023 KQ14 and nicknamed "Ammonite," classifies it as a "sednoid." Sednoids are bodies beyond the orbit of the ice giant Neptune, known as trans-Neptunian objects (TNOs), characterized by a highly eccentric (non-circular) orbit and a distant closest approach to the sun or "perihelion." The closest distance that 2023 KQ14 ever comes to our star is equivalent to 71 times the distance between Earth and the sun... This is just the fourth known sednoid, and its orbit is currently different from that of its siblings, though it seems to have been stable for 4.5 billion years.

However, the team behind the discovery, made using Subaru Telescope as part of the Formation of the Outer Solar System: An Icy Legacy (FOSSIL) survey, thinks that all four sednoids were on similar orbits around 4.2 billion years ago. That implies something dramatic happened out at the edge of the solar system around 400 million years after its birth. Not only does the fact that 2023 KQ14 now follows a unique orbit suggest that the outer solar system is more complex and varied than previously thought, but it also places limits on a hypothetical "Planet Nine" theorized to lurk at the edge of the solar system.
There's "no viable transfer mechanisms" to explain the observed orbits "with the current configuration of planets," according to the team's recently-published paper. But since those orbits are stable, it "suggests that an external gravitational influence beyond those of the currently known Solar System planets is required to form their orbits." So where does that leave us? ScienceAlert summarizes the rest of the paper — and where things stand now: Astronomers have proposed many sources for this external gravitational influence, including interactions with a rogue planet or star, ancient stellar interactions from when the Sun was still in its natal cluster, and the capture of objects from other lower-mass stars in the Solar System's early times. But the explanation that gets the most attention is interactions with a hypothetical planet, Planet Nine.

If Planet Nine exists, it has a huge area to hide in. Some astronomers who have studied its potential existence think it could be the fifth largest planet in the Solar System. It would be so far away that it would be extremely dim. However, we may be on the cusp of detecting it, if it exists. The Vera Rubin Observatory recently saw first light and will begin its decade-long Legacy Survey of Space and Time (LSST). The LSST will find transient events and objects in the Solar System like no other telescope before it. It's purpose-built to find hard-to-detect objects, and not even an elusive object like Planet Nine may be able to hide from it.

Fast Company's tech editor Harry McCracken (also harrymccSlashdot reader #1,641,347) writes: As part of Fast Company's "1995 week", I wrote about IBM's ThinkPad 701, the famous model with an expanding "butterfly" keyboard [which could be stretched from 9.7-inches to 11.5 inches]. By putting full-sized keys in a subnotebook-sized laptop, it solved one of mobile computing's biggest problems.

IBM discontinued it before the end of the year, and neither it nor anyone else ever made anything similar again. And yet it remains amazing.
Check out this 1995 ad for the keyboard! The article calls the butterfly ThinkPad "one of the best things the technology industry has ever done with moving parts," and revisits 1995's race "to design a subnotebook-sized laptop with a desktop-sized keyboard." It's still comically thick, standing almost as tall as four MacBook Airs stacked on each other. That height is required to accommodate multiple technologies later rendered obsolete by technological progress, such as a dial-up fax/modem, an infrared port, two PCMCIA expansion card slots, and a bulky connector for an external docking station... Lifting the screen set off a system of concealed gears and levers that propelled the two sections of keyboard into position with balletic grace... A Businesweek article cited sales of 215,000 units and said it was 1995's best-selling PC laptop. Yet by the time that story appeared in February 1996, the 701 had been discontinued. IBM never made anything like it again. Neither did anyone else...

As portable computers became more popular, progress in display technology had made it possible for PC makers to use larger screens. Manufacturers were also getting better at fitting a laptop's necessary components into less space. These advances let them design a new generation of thin, light laptops that went beyond the limitations of subnotebooks. Once IBM could make a lightweight laptop with a wider screen, "the need for an expanding keyboard was no longer essential," says [butterfly ThinkPad engineer] George Karidis. "It would have just been a novelty."
The article notes a fan's open source guides for repairing butterfly Thinkpads at Project Butterfly, and all the fan-community videos about it on YouTube, "from an excellent documentary to people simply being entranced by it.

"As a thing of wonder, it continues to transcend its own obsolescence."

Felix Baumgartner has died. He was 56.

In 2012 Slashdot extensively covered the skydiver's "leap from the edge of space." ABC News remembers it as a Red Bull-financed stunt that involved "diving 24 miles from the edge of space, in a plummet that reached a speed of more than 500 mph." Baumgartner recalled the legendary jump in the documentary, "Space Jump," and said, "I was the first human being outside of an aircraft breaking the speed of sound and the history books. Nobody remembers the second one...."

Baumgartner, also known as "Fearless Felix," accomplished many records in his career, including setting the world record for highest parachute jump atop the Petronas Towers in Malaysia, flying across the English Channel in a wingsuit in 2003, and base jumping from the 85-foot arm of the Christ the Redeemer statue in Brazil in 2007.
"Baumgartner's altitude record stood for two years," remembers the Los Angeles Times, "until Google executive Alan Eustace set new marks for the highest free-fall jump and greatest free-fall distance."

They report that Baumgartner died Thursday "while engaged in a far less intense activity, crashing into the side of a hotel swimming pool while paragliding in Porto Sant Elpidio, a town on central Italy's eastern coast." More details from the Associated Press: "It is a destiny that is very hard to comprehend for a man who has broke all kinds of records, who has been an icon of flight, and who traveled through space," Mayor Massimiliano Ciarpella told The Associated Press.Ciarpella said that Baumgartner had been in the area on vacation, and that investigators believed he may have fallen ill during the fatal flight... Baumgartner, a former Austrian military parachutist, made thousands of jumps from planes, bridges, skyscrapers and famed landmarks...
ABC News remembers that in 2022 Baumgartner wrote in Newsweek that "Since I was a little kid, I've always looked up to people who left a footprint on this planet... now I think I have left a footprint...

"I believe big dreamers always win."

An anonymous reader quotes a report from TechCrunch: California Forever announced on Thursday plans to build a massive manufacturing park called Solano Foundry, the newest addition to its master-planned "utopian" city backed by a group of Silicon Valley billionaires. Solano Foundry is 2,100 acres that can host 40 million square feet of advanced tech manufacturing space. The manufacturing park will be built as part of its planned walkable city with over 175,000 homes, CEO Jan Sramek said at the Reindustrialize conference in Detroit.

Sramek tweeted that U.S. manufacturers can't win by "building factories off of random freeway exits in the middle of nowhere. The best people don't want to work there." This site will offer expedited permitting, transportation for finished goods, and plenty of power from renewable energy, he said. The hope is that it will attract hardware, engineering, and AI talent from relatively nearby Silicon Valley. Solano County is about 40 miles northeast of San Francisco.