America's Department of Defense "is gearing up for a future conflict in space," reports the Wall Street Journal, "as China and Russia deploy missiles and lasers that can take out satellites and disrupt military and civilian communications." The White House this month proposed a $30 billion annual budget for the U.S. Space Force, almost $4 billion more than last year and a bigger jump than for other services including the Air Force and the Navy.... A key aim of a stand-alone force was to plan, equip and defend U.S. interests in space for all of the services and focus attention on the emerging threats. For the first time, the spending request also includes plans for simulators and other equipment to train Guardians, as Space Force members are known, for potential battle....

Just as it is on Earth, China is the Pentagon's big worry in space. In unveiling a defense strategy late last year, the Biden administration cast China as the greatest danger to U.S. security. In space, the threats from China range from ground-launched missiles or lasers that could destroy or disable U.S. satellites, to jamming and other cyber interference and attacks in space, said Pentagon officials. China has invested heavily in its space program, with a crewed orbiting station, developing ground-based missiles and lasers as well as more surveillance capabilities. This is part of its broader military aims of denying adversaries access to space-based assets.

China is "testing on-orbit satellite systems which could be weaponized as they have already shown the capability to physically control and move other satellites," Gen. Chance Saltzman, chief of space operations for the U.S. Space Force, told a congressional hearing this month. "There's nothing we can do in space that's of any value if the networks that process the information and data are vulnerable to attack," Gen. Saltzman said. A central part of the Space Force's next tranche of military contracts for rocket launches is protecting them from attacks by China and other adversaries. The hope is to make satellites tougher to approach by adversaries' equipment as well as less susceptible to lasers and jamming from space or the ground, said Space Force leaders.
The article also notes the US Defense Department "is moving away from a small number of school bus-size satellites to a planned constellation of hundreds of smaller ones.

"The larger number of targets makes any one satellite less crucial to the network but also requires changes in the capabilities of the satellites themselves, the rockets that put them into orbit and the communications systems they host."

It was 10 times brighter than any previously detected, reports the BBC, noting it illuminated much of the galaxy.

RockDoctor (Slashdot reader #15,477) writes: A recent paper on ArXiv describes a Gamma Ray Burst (GRB) whose light arrived late last year as one of the strongest ever observed. GRB 221009A was detected on October 9 last year (yes, that number is a date), so 5 and a bit months from event to papers published is remarkably quick, and I anticipate that there will be a lot more papers on it in the future. Stand-out points are :


- it lasted for more than ten hours after detection (a space x-ray telescope had time to orbit out of the Earth's shadow and observe it)
- it could (briefly) be observed by amateur astronomers.
- it is also one of the closest gamma-ray bursts seen and is among the most energetic and luminous bursts.


It's redshift is given as z= 0.151, which Wikipedia translates as occurring 1.9 billion years ago, at a distance of 2.4 billion light-years from Earth.

Observations have been made of the burst in radio telescopes (many sites, continuing), optical (1 site ; analysis of HST imaging is still in work), ultraviolet (1 space telescope), x-ray (2 space telescopes) and gamma ray (1 sapce telescope) — over a range of 1,000,000,000,000,000-fold (10^15) in wavelength. It's brightness is such that radio observatories are expected to continue to detect it for "years to come".

The model of the source is of several (3~10) Earth-masses of material ejected from (whatever, probably a compact body (neutron star or black dwarf) merger) and impacting the interstellar medium at relativistic speeds (Lorentz factor 9, velocity >99.2% of c). The absolute brightness of the burst is high (about 10^43 J) and it is made to seem brighter by being close, and also by the energy being emitted in a narrow jet ("beamed"), which we happen to be near the axis of.

General news sites are starting to notice the reports, including the hilarious acronym of "BOAT — Brightest Of All Time". Obviously, with observations having only occurred for about 50 years. we're likely to see something else as bright within the next 50 years.

The brightness of the x-rays from this GRB is such that the x-rays scattered from dust in our galaxy creates halos around the source — which are bright enough to see, and to tell us things about the dust in our galaxy (which is generally very hard to see). Those images are more photogenic than the normal imagery for GRBs — which is nothing — so you'll see them a lot.

ProPublica looks at "a booming underground community of Instagram scammers and hackers who shut down profiles on the social network and then demand payment to reactivate them." While they also target TikTok and other platforms, takedown-for-hire scammers like OBN are proliferating on Instagram, exploiting the app's slow and often ineffective customer support services and its easily manipulated account reporting systems. These Instascammers often target people whose accounts are vulnerable because their content verges on nudity and pornography, which Instagram and its parent company, Meta, prohibit.... In an article he wrote for factz.com last year, OBN dubbed himself the "log-out king" because "I have deleted multiple celebrities + influencers on Meta & Instagram... I made about $300k just off banning and unbanning pages," he wrote.

OBN exploits weaknesses in Meta's customer service. By allowing anyone to report an account for violating the company's standards, Meta gives enormous leverage to people who are able to trick it into banning someone who relies on Instagram for income. Meta uses a mix of automated systems and human review to evaluate reports. Banners like OBN test and trade tips on how to trigger the system to falsely suspend accounts. In some cases OBN hacks into accounts to post offensive content. In others, he creates duplicate accounts in his targets' names, then reports the original accounts as imposters so they'll be barred for violating Meta's ban on account impersonation. In addition, OBN has posed as a Meta employee to persuade at least one target to pay him to restore her account.

Models, businesspeople, marketers and adult performers across the United States told ProPublica that OBN had ruined their businesses and lives with spurious complaints, even causing one woman to consider suicide. More than half a dozen people with over 45 million total followers on Instagram told ProPublica they lost their accounts temporarily or permanently shortly after OBN threatened to report them. They say Meta failed to help them and to take OBN and other account manipulators seriously. One person who said she was victimized by OBN has an ongoing civil suit against Meta for lost income, while others sent the company legal letters demanding payment....

A Meta spokesperson acknowledged that OBN has had short-term success in getting accounts removed by abusing systems intended to help enforce community standards. But the company has addressed those situations and taken down dozens of accounts linked to OBN, the spokesperson said. Most often, the spokesperson said, OBN scammed people by falsely claiming to be able to ban and restore accounts.... After banning an account, OBN frequently offers to reactivate it for a fee as high as $5,000, kicking off a cycle of bans and reactivations that continues until the victim runs out of money or stops paying.
A Meta spokesperson told the site they're currently "updating our support systems," including a tool to help affected users and letting more speak to a live support agent rather than an automated one. But the Meta spokesperson added that "This remains a highly adversarial space, with scammers constantly trying to evade detection by social media platforms."

ProPublica ultimately traced the money to a 20-year-old who lives with his mother (who claimed he was only "funnelling" the money for someone else). After that conversation OBN "announced he would no longer offer account banning as a service" — but would still sell his services in getting your account verified.

Wired pays a visit to a half-finished Microsoft data center that rises out of the flat North Holland farmland — where the security guard tells a local councillor he's not allowed to visit the site, and "Within minutes, the argument has escalated, and the guard has his hand around Ruiter's throat." The security guard lets go of Ruiter within a few seconds, and the councillor escapes with a red mark across his neck. Back in his car, Ruiter insists he's fine. But his hands shake when he tries to change gears. He says the altercation — which he will later report to the police — shows the fog of secrecy that surrounds the Netherlands' expanding data center business.

"We regret an interaction that took place outside our data center campus, apparently involving one of Microsoft's subcontractors," says Craig Cincotta, general manager at Microsoft, adding that the company would cooperate with the authorities.

The heated exchange between Ruiter and Microsoft's security guard shows how contentious Big Tech's data centers have become in rural parts of the Netherlands. As the Dutch government sets strict environmental targets to cut emissions, industries are being forced to compete for space on Dutch farmland — pitting big tech against the increasingly political population of Dutch farmers.

There are around 200 data centers in the Netherlands, most of them renting out server space to several different companies. But since 2015, the country has also witnessed the arrival of enormous "hyperscalers," buildings that generally span at least 10,000 square feet and are set up to service a single (usually American) tech giant. Lured here by the convergence of European internet cables, temperate climates, and an abundance of green energy, Microsoft and Google have built hyperscalers; Meta has tried and failed.

Against the backdrop of an intensifying Dutch nitrogen crisis, building these hyperscalers is becoming more controversial. Nitrogen, produced by cars, agriculture, and heavy machinery used in construction, can be a dangerous pollutant, damaging ecosystems and endangering people's health. The Netherlands produces four times more nitrogen than the average across the EU. The Dutch government has pledged to halve emissions by 2030, partly by persuading farmers to reduce their livestock herds or leave the industry altogether. Farmers have responded with protests, blockading roads with tractors and manure and dumping slurry outside the nature minister's home.
Farmers object that Microsoft is building its data center before it's even received government permits certifying that it won't worsen the nitrogen problem, according to the article. In response the Farmer Citizen Movement has sprung up, and last month it became the joint-largest party in the Dutch Senate. One party leader tells Wired, "It is a waste of fertile soil to put the data centers boxes here."

And Wired adds that opposition to datacenter development is also growing elsewhere in Europe.

The scientific community is reeling after NASA gutted funding for a key Venus mission that was "poised to answer some of the biggest questions about the planet and its volcanic activity," reports The Verge. From the report: This month saw the announcement of one of the most exciting findings about Venus in decades: the first direct evidence of an active volcano there. [...] This finding is "mind-blowing," Venus scientist Darby Dyar told The Verge, opening up possibilities to learn about Venus' geology and atmosphere as well as whether the planet was once habitable. But in the space science community, the excitement about this finding is being overshadowed by the "soft cancellation" of a key NASA Venus mission, which Dyar is also deputy principal investigator for and which had been set to launch in 2028.

The Venus Emissivity, Radio Science, InSAR, Topography, and Spectroscopy (VERITAS) mission was one of three missions set to explore Venus in the next few years, kicking off NASA's "decade of Venus" and seeing a return to the study of our planetary neighbor, which scientists have been calling for for years. But at the Lunar and Planetary Science Conference held recently in Houston, Texas, VERITAS principal investigator Sue Smrekar announced that the mission's funding had been completely gutted, leaving the mission in a state of precarious limbo.

This came as a surprise to many of the conference attendees, who were soon tweeting their support for the mission using the hashtag #SaveVERITAS. The Planetary Society also put out a statement describing the delay of the mission's launch by at least three years as "uncalled-for" and calling on NASA to commit to launching by 2029. NASA has cited problems with another mission, Psyche, as the reason for delaying VERITAS by at least three years. Both Psyche and VERITAS are managed by the Jet Propulsion Laboratory (JPL), the NASA / Caltech research center that is responsible for building robotic spacecraft such as the Mars rovers. JPL had problems meeting its requirements for the Psyche mission, which aims to visit a metal asteroid, and missed its launch date last year. An independent review into the missed launch found it was due to, among other problems, workforce issues at JPL. Budget cuts and cancellations aren't uncommon, but the situation with VERITAS is different because it "had already been selected by NASA to be part of its Discovery Program," adds the Verge. "Historically, once a mission has been selected by NASA, those working on it can be confident that funding will be available. If a delay happens -- as is not uncommon in large, complex missions -- then a lower level of funding is typically made available to keep the basic essentials in place, called bridge funding, until full funding can be restored."

Although the team asked NASA for bridge funding to maintain mission essentials, "virtually all of their funding has been cut, leaving them with a tiny $1.5 million per year," says the report. "This is a highly unusual situation for a selected mission because delaying and restarting missions is so expensive."

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

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

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

Virgin Orbit is ceasing operations "for the foreseeable future" after failing to secure a funding lifeline, CEO Dan Hart told employees during an all-hands meeting Thursday afternoon. The company will lay off nearly all of its workforce. CNBC reports: "Unfortunately, we've not been able to secure the funding to provide a clear path for this company," Hart said, according to audio of the 5 p.m. ET meeting obtained by CNBC. "We have no choice but to implement immediate, dramatic and extremely painful changes," Hart said, audibly choking up on the call. He added this would be "probably the hardest all-hands that we've ever done in my life."

The company will eliminate all but 100 positions, amounting to about 90% of the workforce, Hart said, noting the layoffs will affect every team and department. In a securities filing, the company said the layoffs constituted 675 positions, or approximately 85%. "This company, this team -- all of you -- mean a hell of a lot to me. And I have not, and will not, stop supporting you, whether you're here on the journey or if you're elsewhere," Hart said. Virgin Orbit will "provide a severance package for every departing" employee, Hart said, with a cash payment, extension of benefits, and support in finding a new position -- with a "direct pipeline" set up with sister company Virgin Galactic for hiring.

An anonymous reader quotes a report from Fortune: The U.S., Soviet Union, and Japan have all sent robots to the moon over the past 50 years. Now, a group of college students is joining in by building a shoebox-sized rover that they plan to launch in May, Bloomberg reported Wednesday. The lunar rover, called Iris, will be the first privately-made American robot to explore the surface of the moon, according to the project's website. But that's not all -- it would also be the first student-built rover, and the smallest and lightest one yet. Around 300 students from Carnegie Mellon University have all pitched in on the project.

Iris is tiny and weighs 2 kgs (4.4 lbs) -- but the design is deliberately small. The rover will fly on a private rocket carrying 14 payloads to the moon, which includes Iris, projects for the National Aeronautics and Space Administration as well as some humans. The project involved around 300 students, who will also control and operate Moonshot Mission Control, the control center for Iris based in CMU's campus in Pittsburgh. Iris will spend a total of 50 hours on the moon's surface before it runs out of battery, after which it will be left on the moon. It has two cameras that will help it capture images of dust on the moon's surface.

Electronic Arts (EA) is cutting about 800 jobs, or 6% of its workforce, and reducing office space, the video game company said Wednesday. CNBC reports: The company expects to take impairment charges ranging from $170 to $200 million, according to an SEC filing. "As we drive greater focus across our portfolio, we are moving away from projects that do not contribute to our strategy, reviewing our real estate footprint, and restructuring some of our teams," CEO Andrew Wilson wrote in a note to employees. Layoffs are "the most difficult part, and we are working through the process with the utmost care and respect," he wrote. EA had just under 13,000 employees, according to a quarterly filing in March 2022.

Lockheed Martin has created a spinoff devoted to lunar infrastructure, Crescent Space, whose first project is a Moon-to-Earth satellite network. Engadget reports: Parsec, as it's called, uses a constellation of small lunar satellites to provide a non-stop connection between astronauts, their equipment and the people back home. The system will also provide navigation help. The technology should help explorers keep in touch, and assist with spacecraft course changes. As Lockheed Martin explains, though, it could prove vital to those on lunar soil. Parsec's nodes create a lunar equivalent to GPS, giving astronauts their exact positions and directions back to base. A rover crew might know how to return home without driving into a dangerous crater, for instance.

Crescent's first Parsec nodes should be operational by 2025, with Lockheed Martin providing the satellites. And before you ask: yes, the company is clearly hoping for some big customers. CEO Joe Landon (formerly a Lockheed Martin Space VP) claims Crescent is "well positioned" to support NASA's Artemis Moon landings and other exploratory missions.

Clancy William James writes via The Conversation: We have just published evidence in Nature Astronomy for what might be producing mysterious bursts of radio waves coming from distant galaxies, known as fast radio bursts or FRBs. Two colliding neutron stars -- each the super-dense core of an exploded star -- produced a burst of gravitational waves when they merged into a "supramassive" neutron star. We found that two and a half hours later they produced an FRB when the neutron star collapsed into a black hole. Or so we think. The key piece of evidence that would confirm or refute our theory -- an optical or gamma-ray flash coming from the direction of the fast radio burst -- vanished almost four years ago. In a few months, we might get another chance to find out if we are correct. [...]

The Laser Interferometer Gravitational-Wave Observatory (LIGO) has found two binary neutron star mergers. Crucially, the second, known as GW190425, occurred when a new FRB-hunting telescope called CHIME was also operational. However, being new, it took CHIME two years to release its first batch of data. When it did so, [Alexandra Moroianu, a masters student at the University of Western Australia and lead author of the study] quickly identified a fast radio burst called FRB 20190425A which occurred only two and a half hours after GW190425. Exciting as this was, there was a problem -- only one of LIGO's two detectors was working at the time, making it very uncertain where exactly GW190425 had come from. In fact, there was a 5% chance this could just be a coincidence. Worse, the Fermi satellite, which could have detected gamma rays from the merger -- the "smoking gun" confirming the origin of GW190425 -- was blocked by Earth at the time. [...]

LIGO and two other gravitational wave detectors, Virgo and KAGRA, will turn back on in May this year, and be more sensitive than ever, while CHIME and other radio telescopes are ready to immediately detect any FRBs from neutron star mergers. In a few months, we may find out if we've made a key breakthrough -- or if it was just a flash in the pan.

For the first time, scientists may have discovered indirect evidence that large amounts of invisible dark matter surround black holes. The discovery, if confirmed, could represent a major breakthrough in dark matter research. Space.com reports: Dark matter makes up around 85% of all matter in the universe, but it is almost completely invisible to astronomers. This is because, unlike the matter that comprises stars, planets and everything else around us, dark matter doesn't interact with light and can't be seen. Fortunately, dark matter does interact gravitationally, enabling researchers to infer the presence of dark matter by looking at its gravitational effects on ordinary matter "proxies." In the new research, a team of scientists from The Education University of Hong Kong (EdUHK) used stars orbiting black holes in binary systems as these proxies.

The team watched as the orbits of two stars decayed, or slightly slowed, by about 1 millisecond per year while moving around their companion black holes, designated A0620-00 and XTE J1118+480. The team concluded that the slow-down was the result of dark matter surrounding the black holes which generated significant friction and a drag on the stars as they whipped around their high-mass partners.

Using computer simulations of the black hole systems, the team applied a widely held model in cosmology called the dark matter dynamical friction model, which predicts a specific loss of momentum on objects interacting gravitationally with dark matter. The simulations revealed that the observed rates of orbital decay matched the predictions of the friction model. The observed rate of orbital decay is around 50 times greater than the theoretical estimation of about 0.02 milliseconds of orbital decay per year for binary systems lacking dark matter. The study has been published in The Astrophysical Journal Letters.

An anonymous reader quotes a report from the Record: A national association of current and former military digital security leaders is calling on Congress to establish a separate cyber service, arguing that the lack of one creates an "unnecessary risk" to U.S. national security. In a March 26 memorandum, the Military Cyber Professional Association urged lawmakers to establish a U.S. Cyber Force in this year's annual defense policy bill.

"For over a decade, each service has taken their own approach to providing United States Cyber Command forces to employ and the predictable results remain inconsistent readiness and effectiveness," according to the group, which boasts around 3,700 members. "Only a service, with all its trappings, can provide the level of focus needed to achieve optimal results in their given domain," the memo states. "Cyberspace, being highly contested and increasingly so, is the only domain of conflict without an aligned service. How much longer will our citizenry endure this unnecessary risk?"

The creation of a Cyber Force would follow the arrival of the Space Force in 2019. It was the first new branch of the U.S. military in 72 years, bringing the total to six. The association's missive is likely to spark fresh debate on Capitol Hill, where an increasing number of policymakers see a cyber-specific military service as an inevitability. [..] In its memo, the association says that while "steps should be taken to establish such a service, with urgency, pursuing it in a hasty manner would likely prove to be a source of great disruption and risk to our own forces and operations." Therefore, any legislative approval of a Cyber Force should be accompanied by a "thorough study to determine what this military service should look like, how it be implemented, and the applicable timeline," according to the group.

Microsoft said Monday it is starting to roll out a faster new version of its Teams communication app for Windows to commercial clients enrolled in a preview program. CNBC reports: The software will become available to all customers later this year, and Microsoft also promises new versions of Teams for Mac and the web. The new version also includes enhancements meant to simplify Teams, building on the more than 400 feature updates Microsoft delivered last year, some of them meant to help Microsoft catch up with rivals. Competition comes from the likes of Cisco, Google, Salesforce-owned Slack and Zoom. Instead of displaying a kind of ribbon of functions for a chat, Teams will hide several options behind a plus sign that people can click on. It's a concept people have become accustomed to on other messaging applications. For example, in Slack, users can upload documents or set reminders after clicking on a plus sign under the area where they type messages.

During Teams video calls, the software will show every participant on screen in a box of the same size, rather than giving more space to participants with their cameras on. Until now, Teams calls have sometimes resembled Piet Mondrian paintings characterized by their squares and rectangles of varying sizes and colors. Microsoft is also adjusting Teams so that people who belong to multiple organizations can more easily stay on top of what's going on. "Instead of logging in and out of different tenants and accounts, you can now stay signed in across them all -- receiving notifications no matter which one you are currently using," [Jeff Teper, president of collaborative apps and platforms at Microsoft] wrote in a blog post.

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

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

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

An anonymous reader shares this report from AppleInsider: Apple has allegedly demonstrated its mixed reality headset to its top executives recently, in an attempt to generate excitement for the upcoming platform launch. While executives are keen on the product, others within Apple are not sure it's a home run hit. Eight anonymous current and former employees told the New York Times that they are skeptical about the headset, despite Apple's apparent glossy demonstration of the technology.
Manufacturing has already begun for a June release of the $3,000 headset, insiders say in the Times' article: Some employees have defected from the project because of their doubts about its potential, three people with knowledge of the moves said. Others have been fired over the lack of progress with some aspects of the headset, including its use of Apple's Siri voice assistant, one person said.Even leaders at Apple have questioned the product's prospects. It has been developed at a time when morale has been strained by a wave of departures from the company's design team, including Mr. Ive, who left Apple in 2019 and stopped advising the company last year....

Because the headset won't fit over glasses, the company has plans to sell prescription lenses for the displays to people who don't wear contacts, a person familiar with the plan said. During the device's development, Apple has focused on making it excel for videoconferencing and spending time with others as avatars in a virtual world. The company has called the device's signature application "copresence," a word designed to capture the experience of sharing a real or virtual space with someone in another place. It is akin to what Mark Zuckerberg, Facebook's founder, calls the "metaverse...."

But the road to deliver augmented reality has been littered with failures, false starts and disappointments, from Google Glass to Magic Leap and from Microsoft's HoloLens to Meta's Quest Pro. Apple is considered a potential savior because of its success combining new hardware and software to create revolutionary devices.

Still, the challenges are daunting.

British satellite company OneWeb is gearing up for the launch of its final batch of internet satellites, completing a constellation in low Earth orbit despite some hiccups along the way. Gizmodo reports: India's heaviest launch vehicle LVM-3 will carry 36 OneWeb satellites, with liftoff slated for Sunday at 11:30 p.m. ET, according to OneWeb. The launch will take place at the Satish Dhawan Space Centre in Sriharikota, India, marking OneWeb's second deployment from India. You can watch the launch at the livestream [here].

OneWeb has been building an internet constellation in low Earth orbit since 2020, and it currently consists of 579 functioning satellites, according to statistics kept by Harvard-Smithsonian astrophysicist Jonathan McDowell. The addition of 36 new units will raise the population of the constellation to 615, completing the first orbital shell. The company had originally planned on building a 648-unit constellation, but it says this final launch will cap it off and allow for global coverage.

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

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

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

Longtime Slashdot reader destinyland shares a report from Space.com: The Relativity Space rocket, called Terran 1, lifted off from Launch Complex 16 at Florida's Cape Canaveral Space Force Station at 8:25 p.m. EST (0025 GMT on March 23), kicking off a test flight called "Good Luck, Have Fun" (GLHF). Terran 1 performed well initially. For example, it survived Max-Q -- the part of flight during which the structural loads are highest on a rocket -- and its first and second stages separated successfully. But something went wrong shortly thereafter, at around three minutes into the flight, when the rocket failed to reach orbit.

"No one's ever attempted to launch a 3D-printed rocket into orbit, and, while we didn't make it all the way today, we gathered enough data to show that flying 3D-printed rockets is viable," Relativity Space's Arwa Tizani Kelly said during the company's launch webcast on Wednesday night. "We just completed a major step in proving to the world that 3D-printed rockets are structurally viable," she added.

Land reclamation is nothing new, but during this century there has been a significant rise in the creation of artificial land by humans, with a recent study showing that developers have added more than 2,500 sq km -- an area equivalent to the size of Luxembourg -- to coastlines since 2000. The Guardian reports: Using satellite imagery, Dhritiraj Sengupta, from the University of Southampton, and his colleagues analysed land changes in 135 large cities. Their results, published in the journal Earth's Future, show that much of the recent land reclamation has occurred in the global south, with China, Indonesia and the United Arab Emirates leading the way. Shanghai alone has added about 350 sq km of land. Most of the projects were driven by port expansion, a need for urban space and industrialization, while a small handful were "prestige" projects such as the palm tree-shaped islands of Dubai.