Jack Dorsey has launched Bitchat, a decentralized, peer-to-peer messaging app that uses Bluetooth mesh networks for encrypted, ephemeral chats without requiring accounts, servers, or internet access. The beta version is live on TestFlight, with a full white paper available on GitHub. CNBC reports: In a post on X Sunday, Dorsey called it a personal experiment in "bluetooth mesh networks, relays and store and forward models, message encryption models, and a few other things."

Bitchat enables ephemeral, encrypted communication between nearby devices. As users move through physical space, their phones form local Bluetooth clusters and pass messages from device to device, allowing them to reach peers beyond standard range -- even without Wi-Fi or cell service. Certain "bridge" devices connect overlapping clusters, expanding the mesh across greater distances. Messages are stored only on device, disappear by default and never touch centralized infrastructure -- echoing Dorsey's long-running push for privacy-preserving, censorship-resistant communication.

Like the Bluetooth-based apps used during Hong Kong's 2019 protests, Bitchat is designed to keep working even when the internet is blocked, offering a censorship-resistant way to stay connected during outages, shutdowns or surveillance. The app also supports optional group chats, or "rooms," which can be named with hashtags and protected by passwords. It includes store and forward functionality to deliver messages to users who are temporarily offline. A future update will add WiFi Direct to increase speed and range, pushing Dorsey's vision for off-grid, user-owned communication even further.

"Citizen scientists have successfully located thousands of previously unknown pairs of 'eclipsing binary' stars," reports the Washington Post, citing a recent announcement from NASA. The ongoing initiative helps space researchers hunt for "eclipsing binary" stars, a rare phenomenon in which two stars orbit one another, periodically blocking each other's light. These star pairs offer important data to astrophysicists, who consider the many measurable properties of eclipsing binaries — and the information they bear about the history of star formation and destruction — as a foundation of the field...

The citizen science project in question, the Eclipsing Binary Patrol, validates images from NASA's Transiting Exoplanet Survey Satellite (TESS) mission. The satellite, launched in 2018, is "exceptionally capable at detecting varying stars," the researchers write in a preprint paper describing the initiative. The researchers used machine learning to identify about 1.2 million potential eclipsing star pairs. Citizen scientists then validated a subset of about 60,000... manually inspecting hundreds of thousands of images of eclipse-like events and weeding out actual binaries from images that tricked the algorithm. "Thankfully," the researchers write, "to the rescue come volunteers from all walks of life that boost the capacity of bandwidth-limited professional astronomers many-fold and help tackle the ever-increasing volume of publicly available astronomical data."
Universe Today describes how they limited the dataset to only stars with a magnitude brighter than 15, then used a Python tool to generate a massive dataset of millions of light curves... The outcome of all the work resulted in the identification of 10,001 eclipsing binary systems. 7,936 of them are new to science, while the other 2,065 were previously known, but the study provided updated, more accurate, parameters for their periods, as TESS' dataset provided better insight. There were also some particularly interesting systems that could hold new discoveries, including several that had variable eclipse timings, and plenty that might have a third star, and some that show a significant dynamic between the star being orbited and the one doing the orbiting.

All of those systems await further research, but there's another, unspoken factor at play in this data — exoplanets. TESS was originally designed as an exoplanet hunter, and this kind of large scale AI/human collaboration of lightcurve analysis is exactly the kind of work that could potentially produce even more accurate exoplanet catalogues, as evidenced by some of the work already done in this paper. That seems to be the next step for this dataset, with Dr. Kostov telling an interviewer "I can't wait to search them for exoplanets!" Given the data has already been collected, and the team has already been assembled, it's very likely he'll get his chance soon.

"The China Film Foundation, a nonprofit fund under the Chinese government, plans to use AI to revitalize 100 kung fu classics including Police Story, Once Upon a Time in China and Fist of Fury, featuring Jackie Chan, Jet Li and Bruce Lee, respectively," reports the Los Angeles Times.

"The foundation said it will partner with businesses including Shanghai Canxing Culture & Media Co., which will license 100 Hong Kong films to AI companies to reintroduce those movies to younger audiences globally." The foundation said there are opportunities to use AI to tell those stories through animation, for example. There are plans to release an animated version of director John Woo's 1986 film A Better Tomorrow that uses AI to "reinterpret" Woo's "signature visual language," according to an English transcript of the announcement....

The project raised eyebrows among U.S. artists, many of whom are deeply wary of the use of AI in creative pursuits. The Directors Guild of America said AI is a creative tool that should only be used to enhance the creative storytelling process and "it should never be used retroactively to distort or destroy a filmmaker's artistic work... The DGA strongly opposes the use of AI or any other technology to mutilate a film or to alter a director's vision," the DGA said in a statement. "The Guild has a longstanding history of opposing such alterations on issues like colorization or sanitization of films to eliminate so-called 'objectionable content', or other changes that fundamentally alter a film's original style, meaning, and substance."

The project highlights widely divergent views on AI's potential to reshape entertainment as the two countries compete for dominance in the highly competitive AI space.... During the project's announcement, supporters touted the opportunity AI will bring to China to further its cultural message globally and generate new work for creatives. At the same time, they touted AI's disruption of the filmmaking process, saying the A Better Tomorrow remake was completed with just 30 people, significantly fewer than a typical animated project. China is a "more brutal society in that sense," said Eric Harwit, professor of Asian studies at the University of Hawaii at Manoa. "If somebody loses their job because artificial intelligence is taking over, well, that's just the cost of China's moving forward.... You don't have those freestanding labor organizations, so they don't have that kind of clout to protest against the Chinese using artificial intelligence in a way that might reduce their job opportunities or lead to layoffs in the sector..."

The kung fu revitalization efforts will extend into other areas, including the creation of a martial arts video game.
The article also includes an interesting statistic. "Many people in China embrace AI, with 83% feeling confident that AI systems are designed to act in the best interest of society, much higher than the U.S. where it's 37%, according to a survey from the United Nations Development Program."

Three space probes are leaving our solar system — yet are still functioning. After the two Voyager space probes, New Horizons "was launched in 2006, initially to study Pluto," remembers New Scientist. But "it has since travelled way beyond this point, ploughing on through the Kuiper belt, a vast, wide band of rocks and dust billions of miles from the sun. It is now speeding at tens of thousands of kilometres per hour..."

And it's just performed the first ever example of interstellar navigation... As it hurtles out of our solar system, NASA's New Horizons spacecraft is so far from Earth that the stars in the Milky Way appear in markedly different positions compared with our own view... due to the parallax effect. This was demonstrated in 2020 when the probe beamed back pictures of two nearby stars, Proxima Centauri and Wolf 359, to Earth.

Now, Tod Lauer at the US National Optical-Infrared Astronomy Research Laboratory in Arizona and his colleagues have used this effect to work out the position of New Horizons... Almost all spacecraft calculate their bearings to within tens of metres using NASA's Deep Space Network, a collection of radio transmitters on Earth that send regular signals out to space. In comparison, the parallax method was far less accurate, locating New Horizons within a sphere with a radius of 60 million kilometres, about half the distance between Earth and the sun. "We're not going to put the Deep Space Network out of business — this is only a demo proof of concept," says Lauer. However, with a better camera and equipment they could improve the accuracy by up to 100 times, he says.

Using this technique for interstellar navigation could offer advantages over the DSN because it could give more accurate location readings as a spacecraft gets further away from Earth, as well as being able to operate autonomously without needing to wait for a radio signal to come from our solar system, says Massimiliano Vasile at the University of Strathclyde, UK. "If you travel to an actual star, we are talking about light years," says Vasile. "What happens is that your signal from the Deep Space Network has to travel all the way there and then all the way back, and it's travelling at the speed of light, so it takes years."
Just like a ship's captain sailing by the stars, "We have a good enough three-dimensional map of the galaxy around us that you can find out where you are," Lauer says.

So even when limiting your navigation to what's on-board the spacecraft, "It's a remarkable accuracy, with your own camera!"

Interesting Engineering reports: Astral Systems, a UK-based private commercial fusion company, has claimed to have become the first firm to successfully breed tritium, a vital fusion fuel, using its own operational fusion reactor. This achievement, made with the University of Bristol, addresses a significant hurdle in the development of fusion energy....

Scientists from Astral Systems and the University of Bristol produced and detected tritium in real-time from an experimental lithium breeder blanket within Astral's multi-state fusion reactors. "There's a global race to find new ways to develop more tritium than what exists in today's world — a huge barrier is bringing fusion energy to reality," said Talmon Firestone, CEO and co-founder of Astral Systems. "This collaboration with the University of Bristol marks a leap forward in the search for viable, greater-than-replacement tritium breeding technologies. Using our multi-state fusion technology, we are the first private fusion company to use our reactors as a neutron source to produce fusion fuel."

Astral Systems' approach uses its Multi-State Fusion (MSF) technology. The company states this will commercialize fusion power with better performance, efficiency, and lower costs than traditional reactors. Their reactor design, the result of 25 years of engineering and over 15 years of runtime, incorporates recent understandings of stellar physics. A core innovation is lattice confinement fusion (LCF), a concept first discovered by NASA in 2020. This allows Astral's reactor to achieve solid-state fuel densities 400 million times higher than those in plasma. The company's reactors are designed to induce two distinct fusion reactions simultaneously from a single power input, with fusion occurring in both plasma and a solid-state lattice.
The article includes this quote from professor Tom Scott, who led the University of Bristol's team, supported by the Royal Academy of Engineering and UK Atomic Energy Authority. "This landmark moment clearly demonstrates a potential path to scalable tritium production in the future and the capability of Multi-State Fusion to produce isotopes in general."

And there's also this prediction from the company's web site: "As we progress the fusion rate of our technology, aiming to exceed 10 trillion DT fusions per second per system, we unlock a wide range of applications and capabilities, such as large-scale medical isotope production, fusion neutron materials damage testing, transmutation of existing nuclear waste stores, space applications, hybrid fusion-fission power systems, and beyond."
"Scientists everywhere are racing to develop this practically limitless form of energy," write a climate news site called The Cooldown. (Since in theory nuclear fusion "has an energy output four times higher than that of fission, according to the International Atomic Energy Agency.")

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

Neil Druckmann and Halley Gross, two pivotal creative forces behind HBO's The Last of Us adaptation, have stepped away from the series before work begins on Season 3. Druckmann is focusing on new projects at Naughty Dog, while Gross hinted at other upcoming creative endeavors, leaving showrunner Craig Mazin at the helm. Ars Technica reports: Both were credited as executive producers on the show; Druckmann frequently contributed writing to episodes, as did Gross, and Druckmann also directed. Druckmann and Gross co-wrote the second game, The Last of Us Part 2.

Druckmann said in his announcement post: "I've made the difficult decision to step away from my creative involvement in The Last of Us on HBO. With work completed on season 2 and before any meaningful work starts on season 3, now is the right time for me to transition my complete focus to Naughty Dog and its future projects, including writing and directing our exciting next game, Intergalactic: The Heretic Prophet, along with my responsibilities as Studio Head and Head of Creative. Co-creating the show has been a career highlight. It's been an honor to work alongside Craig Mazin to executive produce, direct and write on the last two seasons. I'm deeply thankful for the thoughtful approach and dedication the talented cast and crew took to adapting The Last of Us Part I and the continued adaptation of The Last of Us Part II."

And Gross said: "With great care and consideration, I've decided to take a step back from my day-to-day work on HBO's The Last of Us to make space for what comes next. I'm so appreciative of how special this experience has been. Working alongside Neil, Craig, HBO, and this remarkable cast and crew has been life changing. The stories we told -- about love, loss, and what it means to be human in a terrifying world -- are exactly why I love this franchise. I have some truly rad projects ahead that I can't wait to share, but for now, I want to express my gratitude to everyone who brought Ellie and Joel's world to life with such care."

New evidence from a 300-year-old supernova remnant in the Large Magellanic Cloud suggests that some Type Ia supernovae may result from a "double detonation" -- where a helium shell ignites first, triggering a second core explosion in a white dwarf before it reaches critical mass. "While the physics of the process itself are interesting, the key question this raises is whether type Ia supernovae really are all equally bright," writes Ars Technica's John Timmer. "If they can detonate with substantially less mass than is needed for direct ignition of the core, then it's possible that some of them could be considerably less bright." However, the research team notes that additional factors -- such as the influence of binary systems or secondary detonations -- could further complicate the picture. Ars Technica reports: "The detonations in the carbon-oxygen core and the helium-rich shell result in qualitatively different yield products," the researchers behind the new work write in a paper describing it. In the paper, they focus on calcium, which there are two ways of producing. One is from the outer shell of helium, via fusion before the detonation dilutes the material. A second batch of calcium is produced through the fusion of the core material as it's ejected in the supernova, which prevents further fusion events from converting it to even heavier elements. (Material deeper in the core does end up getting fused into heavier material.) Because it's produced by both of the detonations, models predict that the expanding sphere of debris will contain two different shells of calcium, with some space in between them. To find evidence for these shells, the researchers checked an older supernova remnant, which allows enough time for the movement of material to separate the shells by enough distance that they can be resolved from Earth.

They focused their observations on a supernova remnant named SNR 0509-67.5, located in the nearby Large Magellanic Cloud. SNR 0509-67.5 is estimated to be a bit over 300 years old, meaning material has had enough time to move a significant distance away from the site of the explosion. Imaging using a spectrograph on the Very Large Telescope allowed them to resolve what, in effect, was a spherical sulfur sandwich, with the role of the bread played by calcium. In other words, if you were to travel away from the site of the explosion, you would first hit a layer of ionized calcium, followed by ionized sulfur, and then run into a second layer of ionized calcium. This is exactly what computer models that simulate double detonations predict. So, the researchers suggest it is strong support for that hypothesis. The researchers say that the details suggest that SNR 0509-67.5 was a white dwarf with roughly the same mass as the Sun when it exploded, and that its explosion was likely triggered by the detonation of a helium shell with only three percent of the Sun's mass.

Astronomers have detected a mysterious "interstellar object," dubbed A11pl3Z, speeding through the solar system at 152,000 mph. If confirmed, it would be just the third known interstellar visitor, following 'Oumuamua and Comet Borisov. The visiting space object will pass near Mars and the Sun later this year before leaving the solar system forever. Live Science reports: The newly discovered object, currently dubbed A11pl3Z, was first spotted in data collected between June 25 and June 29 by the Asteroid Terrestrial-impact Last Alert System (ATLAS), which automatically scans the night sky using telescopes in Hawaii and South Africa. The mystery object was confirmed by both NASA's Center for Near Earth Object Studies and the International Astronomical Union's Minor Planet Center on Tuesday (July 1), according to EarthSky.org.

A11pl3Z is most likely a large asteroid, or maybe a comet, potentially spanning up to 12 miles (20 kilometers). It is traveling toward the inner solar system at around 152,000 mph (245,000 km/h) and is approaching us from the part of the night sky where the bar of the Milky Way is located. Based on A11pl3Z's speed and trajectory, experts think it originated from beyond the sun's gravitational influence and has enough momentum to shoot straight through our cosmic neighborhood without slowing down. However, more observations are needed to tell for sure.

MethaneSAT, an $88 million satellite backed by Jeff Bezos and led by the Environmental Defense Fund to track global methane emissions, has been lost in space after going off course and losing power over Norway. "We're seeing this as a setback, not a failure," Amy Middleton, senior vice president at EDF, told Reuters. "We've made so much progress and so much has been learned that if we hadn't taken this risk, we wouldn't have any of these learnings." Reuters reports: The launch of MethaneSAT in March 2024 was a milestone in a years-long campaign by EDF to hold accountable the more than 120 countries that in 2021 pledged to curb their methane emissions. It also sought to help enforce a further promise from 50 oil and gas companies made at the Dubai COP28 climate summit in December 2023 to eliminate methane and routine gas flaring. [...] While MethaneSAT was not the only project to publish satellite data on methane emissions, its backers said it provided more detail on emissions sources and it partnered with Google to create a publicly-available global map of emissions.

EDF reported the lost satellite to federal agencies including the National Oceanic and Atmospheric Administration, Federal Communications Commission and the U.S. Space Force on Tuesday, it said. Building and launching the satellite cost $88 million, according to the EDF. The organization had received a $100 million grant from the Bezos Earth Fund in 2020 and got other major financial support from Arnold Ventures, the Robertson Foundation and the TED Audacious Project and EDF donors. The project was also partnered with the New Zealand Space Agency. EDF said it had insurance to cover the loss and its engineers were investigating what had happened.

The organization said it would continue to use its resources, including aircraft with methane-detecting spectrometers, to look for methane leaks. It also said it was too early to say whether it would seek to launch another satellite but believed MethaneSAT proved that a highly sensitive instrument "could see total methane emissions, even at low levels, over wide areas."

"For-profit companies are pushing the narrative that they can do space inexpensively," writes Slashdot reader RUs1729 in response to an opinion piece from SpaceNews. "Their track record reveals otherwise: cutting corners won't do it for the foreseeable future." Here's an excerpt from the article, written by Robert N. Eberhart: The headlines in the space industry over the past month have delivered a sobering reminder: space is not forgiving, and certainly not friendly to overpromising entrepreneurs. From iSpace's second failed lunar landing attempt (making them 0 for 2) to SpaceX's ongoing Starship test flight setbacks -- amid a backdrop of exploding prototypes and shifting goalposts -- the evidence is mounting that the commercialization of space is not progressing in the triumphant arc that press releases might suggest. This isn't just a series of flukes. It points to a structural, strategic and cultural problem in how we talk about innovation, cost and success in space today.

Let's be blunt: 50 years ago, we did this. We sent humans to the moon, not once but repeatedly, and brought them back. With less computational power than your phone, using analog systems and slide rules, we achieved feats of incredible precision, reliability and coordination. Today's failures, even when dressed up as "learning opportunities," raises the obvious question: Why are we struggling to do now what we once achieved decades ago with far more complexity and far less technology?

Until very recently, the failure rate of private lunar exploration efforts underscored this reality. Over the past two decades, not a single private mission had fully succeeded -- until last March when Firefly Aerospace's Blue Ghost lander touched down on the moon. It marked the first fully successful soft landing by a private company. That mission deserves real credit. But that credit comes with important context: It took two decades of false starts, crashes and incomplete landings -- from Space IL's Beresheet to iSpace's Hakuto-R and Astrobotic's Peregrine -- before even one private firm delivered on the promise of lunar access. The prevailing industry answer -- "we need to innovate for lower cost" -- rings hollow. What's happening now isn't innovation; it's aspiration masquerading as disruption... "This is not a call for a retreat to Cold War models or Apollo-era budgets," writes Eberhart, in closing. "It's a call for seriousness. If we're truly entering a new space age, then it needs to be built on sound engineering, transparent economics and meaningful technical leadership -- not PR strategy. Let's stop pretending that burning money in orbit is a business model."

"The dream of a sustainable, entrepreneurial space ecosystem is still alive. But it won't happen unless we stop celebrating hype and start demanding results. Until then, the real innovation we need is not in spacecraft -- it's in accountability."

Robert N. Eberhart, PhD, is an associate professor of management and the faculty director of the Ahlers Center for International Business at the Knauss School of Business of University of San Diego. He is the author of several academic publications and books. He is also part of Oxford University's Smart Space Initiative and contributed to Berkeley's Space Sciences Laboratory. Before his academic career, Prof. Eberhart founded and ran a successful company in Japan.

BrianFagioli shares a report from NERDS.xyz: NASA is coming to Netflix. No, not a drama or sci-fi reboot. The space agency is actually bringing real rocket launches, astronaut spacewalks, and even views of Earth from space directly to your favorite streaming service. Starting this summer, NASA+ will be available on Netflix, giving the space-curious a front-row seat to live mission coverage and other programming.

The space agency is hoping this move helps it connect with a much bigger audience, and considering Netflix reaches over 700 million people, that's not a stretch. This partnership is about accessibility. NASA already offers NASA+ for free, without ads, through its app and website. But now it's going where the eyeballs are. If people won't come to the space agency, the space agency will come to them.

Just four weeks after an early June flight to the edge of space, Blue Origin has again carried six more passengers there and back again, reports CBS News, noting that the 10-minute ride was Blue Origin's 13th flight "out of the discernible atmosphere." The New Shepard capsule's stubby single-stage booster roared to life just after 9:38 a.m. EDT, throttled up to full thrust and smoothly climbed away from Blue Origin's launch site near Van Horn, Texas. The hydrogen-fueled BE-3 engine powering the New Shepard fired for about two-and-a-half minutes, accelerating the spacecraft to just under three times the speed of sound.

The capsule then separated from the booster and continued coasting upward along its up-and-down trajectory. At that point, the passengers — Allie and Carl Kuehner, Leland Larson, Freddie Rescigno Jr., Jim Sitkin and Owolabi Salis, the first Nigerian to fly in space — began enjoying about three minutes of weightlessness. Free to unstrap and float about the cabin, the passengers were able to take in the view through the largest windows in any operational spacecraft as the ship climbed to an altitude of just above 65 miles. That's about three miles higher than the internationally recognized boundary between the discernible atmosphere and space.

The capsule then began falling back to Earth and the passengers returned to their seats for the descent to touchdown. The reusable booster, meanwhile, made its own return to the launch site, dropping tail first to a rocket-powered touchdown... The company has now launched 74 passengers, including Bezos' wife Lauren Sánchez, and four who have flown twice.
By April nearly 120 civilians had already travelled to the edge of space, CBS News reported earlier — while Virgin Galactic is expected to resume flights next year.

You can replay the webcast of the mission on Blue Origin's YouTube channel.

In its first 10 hours the Rubin space telescope found 2,104 never-before-seen asteroids in our solar system. And Gizmodo reports the data went directly to the International Astronomical Union's Minor Planet Center (MPC), which "plays an essential role in the early detection and monitoring of asteroids that threaten Earth." The MPC has spent years preparing for the deluge of data from Rubin, ramping up its software to process massive amounts of observations. When the first round officially came flooding in on Monday, it was "nerve-racking and exciting simultaneously," Matthew Payne, MPC director, told Gizmodo.
But Space.com explains how extraordinary that is. "There are approximately a million known asteroids in our cosmic neighborhood; over the next few years, Rubin could very well hike that figure up to five million." "This is five times more than all the astronomers in the world discovered during the last 200 years since the discovery of the first asteroid," Željko IveziÄ, Deputy Director of Rubin's Legacy Survey of Space and Time, said during the conference. "We can outdo two centuries of effort in just a couple of years...." The plan is for Rubin to capture such massive, high-resolution images of the southern sky once every three nights for at least the next 10 years. You can therefore consider it to be a super-fast, super-efficient and super-thorough cosmic imager. Indeed, those qualities are perfect for spotting some of the smallest details trailing through the space around our planet: asteroids. "We make movies of the night sky to see two things: objects that move and objects that change brightness," IveziÄ said. "Objects that move come in two flavors. Stars in our galaxy move, and they move slowly. Much faster objects are asteroids...."

[I]t's tremendously difficult to record an asteroid at all. "Asteroids, they disappear after you get one picture of them," IveziÄ said, calling Rubin's ability to image small objects orbiting the sun "unprecedented."
Space.com notes that the ten million galaxies in its first image are just 0.05% of around 20 billion galaxies that Rubin will have imaged by the end of its 10-year "Legacy Survey of Space and Time" investigating dark energy.

In fact, in its first year of regular operations, the Observation "will collect more data than all previous optical observatories combined," reports Earth.com. That torrent of information — petabytes of images and catalogs — will be processed in near-real time. Alerts will be issued to the worldwide astronomy community within 60 seconds of any detected change in the sky. By democratizing access to its enormous dataset, Rubin Observatory will empower both professionals and citizen scientists. This will foster discoveries that range from mapping the structure of the Milky Way to refining the rate at which the universe is expanding.
Reuters explains just how much data is being generated: The number of alerts the telescope will send every night is equivalent to the inboxes of 83,000 people. It's impossible for someone to look at that one by one," said astrophysicist Francisco Foster. "We're going to have to use artificial intelligence tools."
And New Atlas shares some of the "first look" videos released by the Observatory, including one titled The Cosmic Treasure Chest and another on the Trifid and Lagoon Nebulae (which Space.com describe as clouds of gas and dust condensing to birth new stars).

An anonymous reader shared this report from Smithsonian magazine: Last year, Australian scientists picked up a mysterious burst of radio waves that briefly appeared brighter than all other signals in the sky. Now, the researchers have discovered the blast didn't come from a celestial object, but a defunct satellite orbiting Earth... "We got all excited, thinking maybe we'd discovered a new pulsar or some other object," says Clancy James, a researcher at Australia's Curtin University who is on the Australian Square Kilometer Array Pathfinder (ASKAP) team, to Alex Wilkins at New Scientist. After taking a closer look, however, the team realized that the only viable source for the burst was NASA's dead Relay 2, a short-lived satellite that hasn't been in operation since 1967....

The researchers also discovered that at the time of the event, the satellite was only around 2,800 miles away from Earth, which explains why the signal appeared so strong. The reason behind Relay 2's sudden burst is not clear, but the team has come up with two potential explanations — and neither involves the satellite coming back to life like a zombie. One relates to electrostatic discharge — a build-up of electricity that can result in a sudden blast. Spacecraft get charged with electricity when they pass through plasma, and once enough charge accumulates, it can create a spark. "New spacecraft are built with materials to reduce the build-up of charge, but when Relay 2 was launched, this wasn't well-understood," explains James to Space.com's Robert Lea. The other idea is that a micrometeorite hit the satellite, releasing a small cloud of plasma and radio waves.

Karen Aplin, a space scientist at the University of Bristol in England who was not involved in the study, tells New Scientist that it would be tough to differentiate between signals produced by each of those two scenarios, because they would look very similar. The researchers say they favor the first idea, however, because micrometeorites the size of the one that could have caused the signal are uncommon.
"Their findings were published in a pre-print paper on the arXiv server that has not yet been peer-reviewed."

On the International Space Station, air has been slowly leaking out for years from a Russia-controlled module, reports CNN. But recently "station operators realized the gradual, steady leak had stopped. And that raised an even larger concern." It's possible that efforts to seal cracks in the module's exterior wall have worked, and the patches are finally trapping air as intended. But, according to NASA, engineers are also concerned that the module is actually holding a stable pressure because a new leak may have formed on an interior wall — causing air from the rest of the orbiting laboratory to begin rushing into the damaged area. Essentially, space station operators are worried that the entire station is beginning to lose air.

Much about this issue is unknown. NASA revealed the concerns in a June 14 statement. The agency said it would delay the launch of the private Ax-4 mission, carried out by SpaceX and Houston-based company Axiom Space, as station operators worked to pinpoint the problem. "By changing pressure in the transfer tunnel and monitoring over time, teams are evaluating the condition of the transfer tunnel and the hatch seal," the statement read.

More than a week later, the results of that research are not totally clear. After revealing the new Wednesday launch target Monday night, NASA said in a Tuesday statement that it worked with Roscosmos officials to investigate the issue. The space agencies agreed to lower the pressure in the transfer tunnel, and "teams will continue to evaluate going forward," according to the statement... The cracks are minuscule and mostly invisible to the naked eye, hence the difficulty attempting to patch problem areas.
Axiom Space launched four astronauts to the International Space Station on Wednesday.

But its four-person crew had previously "remained locked in quarantine in Florida for about a month, waiting for their chance to launch," notes CNN, as NASA and the Russian space agency Roscosmos "attempted to sort through" the leak issue.

Longtime Slashdot reader sinij shares a report from Car and Driver with the comment: "Lack of visibility is a significant consequence of improving safety on the front overlap crash testing." Here's an excerpt from the report: The Insurance Institute for Highway Safety has a new method to look at what drivers can't look at, and the results of a DOT study using the method suggest that things have gotten worse over the past quarter-century. [...] For the study, researchers with the U.S. Department of Transportation's Volpe Center used the IIHS method to examine every generation of some popular vehicles sold between 1997 and 2023. The models chosen were the Chevrolet Suburban, the Ford F-150, the Honda Accord, the Honda CR-V, the Jeep Grand Cherokee, and the Toyota Camry. The analysis measured how much of a 10-meter radius is visible to a driver; this distance was chosen because that's approximately how much space a driver needs to react and stop when traveling at 10 mph. The study also measured visibility between 10 and 20 meters from the vehicle.

The biggest model-specific difference was observed with the Honda CR-V. In a 1997 model, the researchers measured 68 percent visibility, while the 2022 came in at just 28 percent. In a 2000 Suburban, the study measured 56 percent visible area within the 10-meter radius, but in a 2023 model it was down to 28 percent. The study concluded that higher hoods on newer versions of both models had the biggest impact on outward visibility. The F-150 started out with low visibility (43% for a 1997 model) and also declined (36% for the 2015 version). The two sedans in the study saw the least regression: A 2003 Accord was measured at 65 percent visibility, with the 2023 close behind at 60 percent, and the Camry went from 61 percent for the 2007 model to 57 percent for a 2023. Results for visibility between 10 and 20 meters were mixed, with some improving and others decreasing over subsequent generations.

While this is not conclusive evidence across the industry, the results from these representative vehicles suggest an overall decline in outward frontal visibility. The study also notes that, during the same time period, pedestrian and bicyclist deaths on U.S. roads increased dramatically -- 37 and 42 percent, respectively. There's likely at least some causation with that correlation, even when you consider the addition of features such as automated emergency braking that are meant to intervene and prevent such collisions.

An anonymous reader quotes a report from UploadVR: Software developer Stijn Spanhove used the newest SDK features of Snap OS to build a prototype of [a real-world ad blocker for Snap Spectacles]. If you're unfamiliar, Snap Spectacles are a bulky AR glasses development kit available to rent for $99/month. They run Snap OS, the company's made-for-AR operating system, and developers build apps called Lenses for them using Lens Studio or WebXR.

Spanhove built the real-world ad blocker using the new Depth Module API of Snap OS, integrated with the vision capability of Google's Gemini AI via the cloud. The Depth Module API caches depth frames, meaning that coordinate results from cloud vision models can be mapped to positions in 3D space. This enables detecting and labeling real-world objects, for example. Or, in the case of Spanhove's project, projecting a red rectangle onto real-world ads.

However, while the software approach used for Spanhove's real-world ad blocker is sound, two fundamental hardware limitations mean it wouldn't be a practical way to avoid seeing ads in your reality. Firstly, the imagery rendered by see-through transparent AR systems like Spectacles isn't fully opaque. Thus, as you can see in the demo clip, the ads are still visible through the blocking rectangle. The other problem is that see-through transparent AR systems have a very limited field of view. In the case of Spectacles, just 46 degrees diagonal. So ads are only "blocked" whenever you're looking directly at them, and you'll still see them when you're not.

An anonymous reader quotes a report from Neuroscience News Science Magazine: Surgeons have performed the first fully robotic heart transplant in the U.S., using advanced robotic tools to avoid opening the chest. [...] Using a surgical robot, lead surgeon Dr. Kenneth Liao and his team made small, precise incisions, eliminating the need to open the chest and break the breast bone. Liao removed the diseased heart, and the new heart was implanted through preperitoneal space, avoiding chest incision.

"Opening the chest and spreading the breastbone can affect wound healing and delay rehabilitation and prolong the patient's recovery, especially in heart transplant patients who take immunosuppressants," said Liao, professor and chief of cardiothoracic transplantation and circulatory support at Baylor College of Medicine and chief of cardiothoracic transplantation and mechanical circulatory support at Baylor St. Luke's Medical Center. "With the robotic approach, we preserve the integrity of the chest wall, which reduces the risk of infection and helps with early mobility, respiratory function and overall recovery."

In addition to less surgical trauma, the clinical benefits of robotic heart transplant surgery include avoiding excessive bleeding from cutting the bone and reducing the need for blood transfusions, which minimizes the risk of developing antibodies against the transplanted heart. Before the transplant surgery, the 45-year-old patient had been hospitalized with advanced heart failure since November 2024 and required multiple mechanical devices to support his heart function. He received a heart transplant in early March 2025 and after heart transplant surgery, he spent a month in the hospital before being discharged home, without complications.

The James Webb Space Telescope has discovered its first new exoplanet, TWA 7b -- a young, low-mass planet about 100 times the mass of Earth, making it the lightest planet ever directly imaged beyond the solar system. Space.com reports: TWA 7b was discovered in the debris rings that surround the low-mass star CE Antilae, also known as TWA 7, located around 111 light-years from Earth. CE Antilae is a very young star, estimated to be around just a few million years old. If that seems ancient, consider the sun, a "middle-aged" star, is around 4.6 billion years old.

[...] The disk of CE Antilae is divided into three distinct rings, one of which is narrow and bounded by two empty "lanes" mostly devoid of matter. When imaging this ring, the JWST spotted an infrared-emitting source, which the team of astronomers determined is most likely a young exoplanet. They then used simulations that confirmed the formation of a thin ring and a "hole" exactly where this planet is positioned, corresponding to JWST observations. The research has been published in the journal Nature.

If Fedora drops 32-bit support, the gaming-focused Bazzite project would be forced to shut down, according to its founder Kyle Gospodnetich. "As much as I'd like this change to happen, it's too soon," said Gospodneitch in a post. "This change would kill off projects like Bazzite entirely right as Fedora is starting to make major headway in the gaming space. Neal Gompa already pointed out basic use cases that would be broken even if someone built the packages Steam itself needs to function."

He continued: "It's also causing irreparable damage to Fedora from a PR standpoint. I have been inundated all day with people sharing news articles and being genuinely concerned Steam is gong to stop working on their Fedora/Bazzite machines. I would argue not only should this change be rejected, the proposal should be rescinded to limit further damage to Fedora as a project. Perhaps open a separate one to talk about changing build architecture to build fewer 32-bit packages?"

When pushed further, Gospodnetich said: "I'm speaking as it's founder, if this change is actually made as it is written the best option for us is to just go ahead and disband the project."