Carriers have gotten stricter about how many items you can take on board, no matter how small they are. From a report: Fanny packs. Cross-body bags. Shopping bags. Pillows and blankets. The Southwest Airlines gate agent rattled off so many items that counted toward the two carry-on bag limit on my flight to Baltimore, I thought it might be a playful jab at Spirit and Frontier and their rigid carry-on policing to collect more fees. But this was no joke. Southwest quietly began cracking down on carry-on bags on Feb. 22, ahead of the spring and summer travel rush, advising gate agents of the changes in a memo. This crackdown isn't about bag size. It is about how many bags you have.

Southwest isn't alone in putting passengers' personal items in its crosshairs as a way to save precious bin space and speed up boarding. Delta and United agents have also recently asked me to stuff my small Lululemon bag in my backpack. One American Airlines frequent flier told me he watched gate agents in Sacramento, Calif., and Dallas list a litany of items that count as a personal item on weekend flights to Nashville, Tenn., last month. Carting all your stuff to the gate can save you time and often saves money, especially with some airlines' new, higher checked-baggage fees. Delta joined the club on Tuesday, announcing prices of $35 for your first bag and $45 for your second. But testing airlines' carry-on limits is now more likely to backfire, and lose you precious time as airlines make you consolidate items or check a bag at the gate.

Andrew Jones reports via SpaceNews: The China Aerospace Science and Technology Corporation (CASC) plans to launch four-meter and five-meter-diameter reusable rockets for the first time in 2025 and 2026 respectively, Wang Wei, a deputy to the National People's Congress, told China News Service March 4. The reports do not clearly identify the two rockets. CASC is known to be developing a new, 5.0m-diameter crew launch vehicle, known as the Long March 10. A single stick version would be used to launch a new-generation crew spacecraft to low Earth orbit and could potentially fly in 2025. A three-core variant will launch the "Mengzhou" crew spacecraft into trans-lunar orbit.

The rocket is key to China's plans to put astronauts on the moon before 2030. The Long March 10 lunar variant will be 92 meters long and be able to launch 27 tons into trans-lunar orbit. The 4.0-meter-diameter launcher could be a rocket earlier proposed by CASC's Shanghai Academy of Spaceflight Technology (SAST). That rocket would be able to launch up to 6,500 kg of payload to 700-kilometer sun-synchronous orbit (SSO). It would notably use engines developed by the commercial engine maker Jiuzhou Yunjian.

CASC's first move to develop a reusable rocket centered on making a recoverable version of the Long March 8. That plan appears to have been abandoned. SAST also plans to debut the 3.8m-diameter Long March 12 later this year from a new commercial launch site. While the Long March 10 has specific, defined uses for lunar and human spaceflight, the second reusable rocket would appear to be in competition with China's commercial rocket companies. While this suggests duplication of effort, it also fits into a national strategy to develop reusable rockets and support commercial ecosystems. The moves would greatly boost China's options for launch and access to space. It would also provide new capacity needed to help construction planned low Earth orbit megaconstellations.

The U.S. government announced Tuesday sanctions against the founder of the notorious spyware company Intellexa and one of his business partners. From a report: This is the first time the U.S. government has targeted specific people, in addition to companies, with sanctions related to the misuse of commercial spyware. And it signifies an escalation of the White House and U.S. government's efforts to curb the spyware industry. "Today's actions represent a tangible step forward in discouraging the misuse of commercial surveillance tools, which increasingly present a security risk to the United States and our citizens," said Brian E. Nelson, U.S Treasury's under secretary for terrorism and financial intelligence, was quoted as saying in a press release.

"The United States remains focused on establishing clear guardrails for the responsible development and use of these technologies while also ensuring the protection of human rights and civil liberties of individuals around the world." The U.S. Treasury imposed sanctions on Tal Dilian, the founder of Intellexa and a veteran of the spyware industry; and Sara Aleksandra Fayssal Hamou, who is not as well-known as Dilian. Hamou, according to the Treasury, has a leadership role in Intellexa, is an expert in off-shoring, and provided the company managerial services, such as renting office space in Greece.

In an update on CBS' "60 Minutes" on Sunday, Blue Origin said it was aiming to send an uncrewed lander to the surface of the moon in the next 12 to 16 months. A crewed version is expected to follow. GeekWire reports: "We're expecting to land on the moon between 12 and 16 months from today," [said John Couluris, senior vice president for lunar permanence at Blue Origin]. "I understand I'm saying that publicly, but that's what our team is aiming towards." Couluris was referring to a pathfinder version of Blue Origin's nearly three-story-tall Blue Moon Mark 1 cargo lander, which is taking shape at Blue Origin's production facility in Huntsville, Ala. The Pathfinder Mission would demonstrate the MK1's capabilities -- including its hydrogen-fueled BE-7 engine, its precision landing system and its ability to deliver up to 3 tons of payload anywhere on the moon.

Blue Origin envisions building multiple cargo landers, as well as a crewed version of the Blue Moon lander that could transport NASA astronauts to and from the lunar surface. The MK1 cargo lander is designed for a single launch and delivery, but the crewed lander would be reusable. "We'll launch them to lunar orbit, and we'll leave them there," Couluris explained. "And we'll refuel them in orbit, so that multiple astronauts can use the same vehicle back and forth."

The Pathfinder Mission would be funded by Blue Origin, but NASA is providing support for other Blue Moon missions. Blue Origin's $3.4 billion contract with NASA calls for the crewed lander to be available for the Artemis 5 moon mission by 2029, with an uncrewed test flight as part of the buildup. The in-space refueling operation would make use of a cislunar transporter, built by Lockheed Martin, that could travel between low Earth orbit and lunar orbit with supplies. "We are now building with NASA the infrastructure to ensure lunar permanency," Couluris said. NASA is providing funding for the Blue Moon landing system as an alternative to SpaceX's Starship system, which is under development at SpaceX's Starbase in South Texas. The crewed Starship lunar lander is scheduled to come into play for Artemis 3, a milestone landing mission that's currently scheduled for 2026. [...]

Blue Origin plans to send the MK1 lander to the moon on its reusable New Glenn rocket, which is also under development. A couple of weeks ago, a pathfinder version of that rocket was raised on a Florida launch pad for the first time, and it's currently going through a series of cryogenic tanking tests. Blue Origin CEO Dave Limp, who was brought over to the company from Amazon last year to accelerate work on New Glenn, said in a LinkedIn post that he's "looking forward to bringing this heavy-lift capacity to our customers later this year." One of the early launches is tasked with sending a pair of NASA probes to Mars.

An anonymous reader quotes a report from The Guardian: New research suggests there's less oxygen on the icy surface of Jupiter's moon Europa than thought -- and that could affect what if any life might be lurking in Europa's underground ocean. Even with little or no oxygen, microbes might still be bustling around in the ocean believed to exist miles beneath Europa's frozen crust. As for what else, "who knows," said the Nasa scientist Kevin Hand, who was not involved in the study published on Monday in Nature Astronomy. More work is needed to confirm these findings, which are contrary to earlier telescope observations of condensed oxygen in Europa's ice, indicating a higher oxygen concentration, said Hand.

The new study is based on data collected by Nasa's Juno spacecraft during a particularly close flyby of Europa in 2022 -- a distance of just 219 miles (353km). A US-European team calculated that between 13 and 39lbs (6 and 18kg) of oxygen are produced every second at Europa's surface. Previous estimates had a much wider spread, with as much as 2,245 pounds (1,100 kilograms) of oxygen produced per second. So "unless Europa's oxygen production was significantly higher in the past," the new measurements provide "a narrower range to support habitability," the researchers wrote. This oxygen is formed, along with hydrogen, as Jupiter's radiation blasts Europa's global shell of frozen water. It is unknown how much oxygen escapes into the moon's atmosphere, how much remains in the ice and how much might find its way to the subterranean sea. The report notes that NASA plans to launch the Europa Clipper this fall. "The spacecraft will make dozens of close flybys of Europa -- nearly the size of our moon -- while orbiting the giant gas planet."

"NASA said Friday it is shutting down a $2 billion satellite refueling project," reports UPI, "after criticizing the project's contractor for poor performance." The agency in a statement said it will discontinue the On-orbit Servicing, Assembly and Manufacturing 1 project after nearly a decade of work due to "continued technical, cost, and schedule challenges, and a broader community evolution away from refueling unprepared spacecraft, which has led to a lack of a committed partner." [...] The spacecraft would have utilized an attached Space Infrastructure Dexterous Robot (SPIDER) to refuel the Landsat, assemble a communications antenna and demonstrate in-space manufacture of a 32-foot carbon fiber composite beam to verify the capability of constructing large spacecraft structures in orbit... An audit from NASA's Inspector General, however, found OSAM-1 was on track to exceed the projected $2.05 billion budget and would not make its December 2026 launch date, laying the blame on the "poor performance of Maxar."

"NASA and Maxar officials acknowledged that Maxar underestimated the scope and complexity of the work, lacked full understanding of NASA technical requirements, and were deficient in necessary expertise," the report read.

The report also noted Maxar was "no longer profiting from their work on OSAM-1," after which the xproject appeared not "to be a high priority for Maxar in terms of the quality of its staffing."
Thanks to long-time Slashdot reader schwit1 for sharing the news.

"These days in San Francisco, every major business closure triggers a rush to assign blame," argues the San Francisco Standard: When Macy's announced this week that it would shutter its flagship store in Union Square, it unleashed a wave of mourning and recriminations... Mayor London Breed and other local pols like state Sen. Scott Wiener tried to allay fears that Macy's was leaving because of crime, noting the planned closure is one of 150 nationwide. But in a tough election year, it seems few had the appetite to listen to her call for nuance...

The unavoidable truth is the pandemic hollowed out downtown San Francisco's offices and led to an exodus of tech staffers who preferred remote work. It meant the loss of thousands of people who had reason to regularly stroll by Macy's and so many other corporate retailers. Meanwhile, everybody else had even less reason to go shopping in an urban core. Why bother dressing up and schlepping downtown when you could get the same layaway deals online...? [R]etail has been recovering. But it should be no surprise that the recovery has happened largely in suburban markets, which have not experienced a mass exit of workers... Elsewhere, the reality is simple: Malls and department stores have been dying for the last decade, struggling to attract young people and redevelop growing vacant space into desirable uses.

Although Macy's is a legacy name, industry reports show it has been in a real doom loop of its own making. Everyone is angry about retail "shrinkage," an industry term for losses in inventory due to external theft, employee theft and mismanagement. However, reporting by CNBC and others has demonstrated that while corporate retailers may be seeing a bump in retail shrink, it is a smaller factor than other operational missteps. Industry experts suggest that "shrink" can be an excuse for poor inventory management and staffing issues, and brands like Lowe's, Foot Locker and Walgreens are now downplaying organized theft as a primary cause of revenue loss. The reality is that a swath of American retail chains have needed to downsize to remain profitable... [R]eactionary cries for police crackdowns on petty theft and homelessness miss how similar retail shutdowns are happening in cities with tougher crime laws and less visible poverty. Consider that Macy's has already conducted layoffs and cut employee benefits to remain afloat, triggering a worker strike in 2022. Then there's Macy's faltering credit card revenue, which the company said accounted for nearly triple the revenue loss as retail shrink.

While The Standard has reported on Macy's workers blaming theft for the closure, my own visit to Macy's on Tuesday and conversations with longtime sales associates in multiple departments suggested that low staffing, an aging clientele and dips in seasonal shopping have greatly affected business...

Turns out, "scary people stealing things" is a boogeyman that feels more tangible than the obscure machinations of a faltering corporation.
The San Francsico Standard itself was funded in part by billionaire venture capitalist Michael Moritz of Sequoia Capital...

It completed the most precise landing ever on the moon — albeit upside-down. And then it faced a "lunar night" lasting about two weeks where temperatures drop to -270 degrees Fahrenheit, reports the Times of India.

But then, "Despite not being designed for the extreme temperatures, SLIM surprised scientists by coming back to life after the two-week-long lunar night." More from Space.com: The lander woke up on February 26 during extremely hot temperatures of 212 Fahrenheit (100 Celsius) in its region and has been making contact here and there with Earth in the days since. Most recently, SLIM attempted observations with its multiband spectroscopic camera, but "it did not work properly," JAXA officials wrote. "This seems to be due to the effects of overnight," the update continued, referring to the frigid two-week-long lunar night that SLIM experienced before the sun shone near Shioli crater again. "But we will continue to investigate based on the data we have obtained for the next opportunity...."
"We received so much support for our operations after the lunar night," the agency posted on social media — adding "thank you!"

The Times of India reports that "JAXA officially announced SLIM's return to a dormant state on March 1, sharing an image of the lunar surface captured by the probe."

Above the photo, JAXA posted this hopeful message. "Although the probability of a failure increases with the repeated severe temperature cycles, SLIM operation will attempt to resume when the sun rises (late March). #GoodAfterMoon."

And Space.com notes that "Despite all, SLIM has met both main and extended mission objectives: Landing precisely on the moon, deploying two tiny rovers and conducting science with its navigation camera and its spectroscopic camera, particularly searching for signs of olivine on the surface."

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

Space.com writes that NASA's plan to return samples from Mars to the earth "is facing major challenges, according to a new report.

"Design, cost and scheduling are all significant obstacles, an audit report of NASA's Mars Sample Return (MSR) Program by the agency's Office of Inspector General (OIG) finds..." It involves landing on Mars to collect samples taken by the Perseverance rover and launching those samples to rendezvous with an orbiter, which will haul them to Earth. Perseverance is already on Mars, snagging and storing samples. But the program still needs to build a Sample Retrieval Lander and an Earth Return Orbiter, the latter being developed and funded by the European Space Agency. The Mars Sample Return program is one of the most technically complex, operationally demanding and ambitious robotic science missions ever undertaken by NASA, according to the OIG report.

The report notes design, architecture and schedule issues with the Capture Containment and Return System. These design issues resulted in adding about $200 million to the budget and one year of lost schedule... There is concern that, due to the number and significance of cost increase indicators so far, the $7.4 billion estimate is "premature and may be insufficient," the report finds. Now, the complexity... could drive costs to between $8 billion to $11 billion, the OIG report notes, citing a September 2023 Independent Review Board report. Notably, a July 2020 estimate listed costs of $2.5 to $3 billion.

These new figures indicate significant financial challenges and uncertainties... Issues include inflation, supply chain problems and increases in funding requests for specific program components.

The desert planet Arrakis in Frank Herbert's science fiction novel Dune is plausible, says Alexander Farnsworth, a climate modeler at the University of Bristol in England. According to Science News, the world would be a harsh place for humans to live, and they probably wouldn't have to worry about getting eaten by extraterrestrial helminths. From the report: For their Arrakis climate simulation, which you can explore at the website Climate Archive, Farnsworth and colleagues started with the well-known physics that drive weather and climate on Earth. Using our planet as a starting point makes sense, Farnsworth says, partly because Herbert drew inspiration for Arrakis from "some sort of semi-science of looking at dune systems on the Earth itself." The team then added nuggets of information about the planet from details in Herbert's novels and in the Dune Encyclopedia. According to that intel, the fictional planet's atmosphere is similar to Earth's with a couple of notable differences. Arrakis has less carbon dioxide in the atmosphere than Earth -- about 350 parts per million on the desert planet compared with 417 parts per million on Earth. But Dune has far more ozone in its lower atmosphere: 0.5 percent of the gases in the atmosphere compared to Earth's 0.000001 percent.

All that extra ozone is crucial for understanding the planet. Ozone is a powerful greenhouse gas, about 65 times as potent at warming the atmosphere as carbon dioxide is, when measured over a 20-year period. "Arrakis would certainly have a much warmer atmosphere, even though it has less CO2 than Earth today," Farnsworth says. In addition to warming the planet, so much ozone in the lower atmosphere could be bad news. "For humans, that would be incredibly toxic, I think, almost fatal if you were to live under such conditions," Farnsworth says. People on Arrakis would probably have to rely on technology to scrub ozone from the air. Of course, ozone in the upper atmosphere could help shield Arrakis from harmful radiation from its star, Canopus. (Canopus is a real star also known as Alpha Carinae. It's visible in the Southern Hemisphere and is the second brightest star in the sky. Unfortunately for Dune fans, it isn't known to have planets.) If Arrakis were real, it would be located about as far from Canopus as Pluto is from the sun, Farnsworth says. But Canopus is a large white star calculated to be about 7,200 degrees Celsius. "That's significantly hotter than the sun," which runs about 2,000 degrees cooler, Farnsworth says. But "there's a lot of supposition and assumptions they made in here, and whether those are accurate numbers or not, I can't say."

The climate simulation revealed that Arrakis probably wouldn't be exactly as Herbert described it. For instance, in one throwaway line, the author described polar ice caps receding in the summer heat. But Farnsworth and colleagues say it would be far too hot at the poles, about 70Â C during the summer, for ice caps to exist at all. Plus, there would be too little precipitation to replenish the ice in the winter. High clouds and other processes would warm the atmosphere at the poles and keep it warmer than lower latitudes, especially in the summertime. Although Herbert's novels have people living in the midlatitudes and close to the poles, the extreme summer heat and bone-chilling -40C to -75C temperatures in the winters would make those regions nearly unlivable without technology, Farnsworth says. Temperatures in Arrakis' tropical latitudes would be relatively more pleasant at 45C in the warmest months and about 15C in colder months. On Earth, high humidity in the tropics makes it far warmer than at the poles. But on Arrakis, "most of the atmospheric moisture was essentially removed from the tropics," making even the scorching summers more tolerable. The poles are where clouds and the paltry amount of moisture gather and heat the atmosphere. But the tropics on Arrakis pose their own challenges. Hurricane force winds would regularly sandblast inhabitants and build dunes up to 250 meters tall, the researchers calculate. It doesn't mean people couldn't live on Arrakis, just that they'd need technology and lots of off-world support to bring in food and water, Farnsworth says. "I'd say it's a very livable world, just a very inhospitable world."

Nikon is working with NASA to make a mirrorless camera that astronauts will use during the agency's incoming Artemis III mission to document their return to the Moon. From a report: On Thursday, NASA announced that it had entered a Space Act agreement with Nikon to develop the Handheld Universal Lunar Camera (HULC), a camera system designed to capture imagery in low light and survive the harsh lunar environment. The crewed Artemis III mission -- which will launch "no earlier than September 2026" -- aims to explore the lunar south pole, a region of the Moon that contains water ice within permanently shadowed craters.

That makes it an area of scientific interest, but the extreme lighting and temperature conditions pose particular technical challenges for operating equipment within the lunar south pole region. Nikon's full-frame Z9 flagship has already been used in thermal, vacuum, and radiation testing before the agreement, with a modified version of the camera forming the base of the HULC system alongside Nikkor lenses. The HULC design also implements thermal blankets designed by NASA to protect the camera from dust and extreme temperatures and modified electrical components to minimize potential issues caused by radiation. A custom grip with modified buttons has been used to make it easier for suited crew members to operate the camera system while wearing gloves.

Russian space officials have acknowledged a continuing air leak from the Russian segment of the International Space Station, but said it poses no danger to its crew. From a report: The Roscosmos state corporation said that specialists were monitoring the leak and the crew "regularly conducts work to locate and fix possible spots of the leak." It said in a statement carried by Russian news agencies: "There is no threat to the crew or the station itself." Joel Montalbano, Nasa's station project manager, had noted on Wednesday that the leak in the Russian segment has increased but emphasised that it remained small and posed no threat to the crew's safety or vehicle operations.

As the space outpost is ageing, the crew has to spend more time to repair and maintain it, Roscosmos said. Russian space officials first reported a leak in the Zvezda module in August 2020 and later that year Russian crew members located what they believed was its source and tried to fix it. In November 2021, another potentially leaky spot was found in a different part of the Russian section of the station. Roscosmos and Nasa have said the leak posed no danger to the crew and did not affect operations on the station. There have been other glitches. In October, coolant leaked from an external backup radiator for Russia's new science lab, Nauka, although its main thermal control system was working normally and space officials said the crew and the station were not in danger.

An anonymous reader quotes an excerpt from a Wired article: In 2019, a government contractor and technologist named Mike Yeagley began making the rounds in Washington, DC. He had a blunt warning for anyone in the country's national security establishment who would listen: The US government had a Grindr problem. A popular dating and hookup app, Grindr relied on the GPS capabilities of modern smartphones to connect potential partners in the same city, neighborhood, or even building. The app can show how far away a potential partner is in real time, down to the foot. But to Yeagley, Grindr was something else: one of the tens of thousands of carelessly designed mobile phone apps that leaked massive amounts of data into the opaque world of online advertisers. That data, Yeagley knew, was easily accessible by anyone with a little technical know-how. So Yeagley -- a technology consultant then in his late forties who had worked in and around government projects nearly his entire career -- made a PowerPoint presentation and went out to demonstrate precisely how that data was a serious national security risk.

As he would explain in a succession of bland government conference rooms, Yeagley was able to access the geolocation data on Grindr users through a hidden but ubiquitous entry point: the digital advertising exchanges that serve up the little digital banner ads along the top of Grindr and nearly every other ad-supported mobile app and website. This was possible because of the way online ad space is sold, through near-instantaneous auctions in a process called real-time bidding. Those auctions were rife with surveillance potential. You know that ad that seems to follow you around the internet? It's tracking you in more ways than one. In some cases, it's making your precise location available in near-real time to both advertisers and people like Mike Yeagley, who specialized in obtaining unique data sets for government agencies.

Working with Grindr data, Yeagley began drawing geofences -- creating virtual boundaries in geographical data sets -- around buildings belonging to government agencies that do national security work. That allowed Yeagley to see what phones were in certain buildings at certain times, and where they went afterwards. He was looking for phones belonging to Grindr users who spent their daytime hours at government office buildings. If the device spent most workdays at the Pentagon, the FBI headquarters, or the National Geospatial-Intelligence Agency building at Fort Belvoir, for example, there was a good chance its owner worked for one of those agencies. Then he started looking at the movement of those phones through the Grindr data. When they weren't at their offices, where did they go? A small number of them had lingered at highway rest stops in the DC area at the same time and in proximity to other Grindr users -- sometimes during the workday and sometimes while in transit between government facilities. For other Grindr users, he could infer where they lived, see where they traveled, even guess at whom they were dating.

Intelligence agencies have a long and unfortunate history of trying to root out LGBTQ Americans from their workforce, but this wasn't Yeagley's intent. He didn't want anyone to get in trouble. No disciplinary actions were taken against any employee of the federal government based on Yeagley's presentation. His aim was to show that buried in the seemingly innocuous technical data that comes off every cell phone in the world is a rich story -- one that people might prefer to keep quiet. Or at the very least, not broadcast to the whole world. And that each of these intelligence and national security agencies had employees who were recklessly, if obliviously, broadcasting intimate details of their lives to anyone who knew where to look. As Yeagley showed, all that information was available for sale, for cheap. And it wasn't just Grindr, but rather any app that had access to a user's precise location -- other dating apps, weather apps, games. Yeagley chose Grindr because it happened to generate a particularly rich set of data and its user base might be uniquely vulnerable. The report goes into great detail about how intelligence and data analysis techniques, notably through a program called Locomotive developed by PlanetRisk, enabled the tracking of mobile devices associated with Russian President Vladimir Putin's entourage. By analyzing commercial adtech data, including precise geolocation information collected from mobile advertising bid requests, analysts were able to monitor the movements of phones that frequently accompanied Putin, indicating the locations and movements of his security personnel, aides, and support staff.

This capability underscored the surveillance potential of commercially available data, providing insights into the activities and security arrangements of high-profile individuals without directly compromising their personal devices.

Astronomers are investigating a star system 100 light-years away with six sub-Neptune planets in near-perfect orbital resonance, piquing the interest of scientists searching for alien technology, or technosignatures. Space.com reports: To be clear, no such evidence was found in the system, dubbed HD 110067. However, the researchers say they're not done looking yet. HD 11067 remains an interesting target for similar observations in the future. In our own tiny pocket of the cosmos, radio waves from satellites and telescopes beaming out in the plane of our solar system, meaning that if somebody outside our solar system watched Earth cross the face of our sun, they'd maybe be able to pick up a signal that coincides with the planet's transit.

HD 110067 is viewed edge on from Earth, so we are seeing the six planets in the plane of their system -- a view that gives us an excellent chance of picking up such a signal if there exists one, study co-author Steve Croft, a radio astronomer working with the life-searching Breakthrough Listen program at the University of California, Berkeley, told Space.com "Our technology in our own solar system has spread outside the habitable zone," Croft told Space.com. So technology-friendly civilization in HD 110067, if any, may have communication relays set up on multiple planets in the system, he said. "Even if it is a negative result, that still tells us something."

When HD 110067's discovery was announced, Croft and his team used the world's largest fully steerable telescope, the Green Bank Telescope (GBT) in West Virginia, and searched the system for signs of alien technology. The researchers looked for signals that were continuously present when the telescope was pointed at the system and absent when directed away, the smoking gun of technosignatures local to HD 110067. But such signals are difficult to distinguish from natural sources of radio waves and humankind's own technological signals, such as radio waves beaming from cell phones connected to Wi-Fi, SpaceX's Starlink satellite network in low Earth orbit. This creates a haystack of signals in which researchers look for a needle of a potential extraterrestrial signal, said Croft. "I should add we don't know if there are needles in the haystack," he said. "We don't really know what the needles look like." The research has been published in the journal Research Notes of the AAS.

Robin George Andrews writes via The New York Times: In 2022, when NASA's $325 million spacecraft crashed into an asteroid named Dimorphos at 14,000 miles per hour, cheers and applause erupted back on Earth. NASA's Double Asteroid Redirection Test (DART) mission deliberately targeted Dimorphos to change its orbit around the larger asteroid Didymos as a dress rehearsal of sorts for thwarting a deadly space rock that might someday head toward Earth. The world's first-ever planetary defense experiment was deemed a triumph: The asteroid's orbit shrank by 33 minutes, far above the minimum threshold of 73 seconds. But what the DART team didn't realize then was just how bizarrely Dimorphos responded to that punch. A new study, published on Monday in Nature Astronomy, has concluded that DART hit Dimorphos so hard that the asteroid changed shape.

Simulations of the impact suggest that the spacecraft's death did not excavate a normal, bowl-shaped crater. Instead, it left behind something that resembles a dent. And although the artificial impact blasted millions of tons of rock into space, plenty splashed back onto its sides like tremendous tidal waves. It widened Dimorphos, transforming it from a squat orb into a flat-topped oval -- like an M&M candy. That the asteroid acted like a fluid comes down to its peculiar composition. It's not a solid contiguous rock, but more like "a pile of sand," said Sabina Raducan, a planetary scientist at the University of Bern in Switzerland and the study's lead author. And a low-density asteroid barely held together by its own gravity was never going to respond in a straightforward manner when a van-size spacecraft flew into its face.

Dimorphos's response is "completely outside of the realm of physics as we understand it" in our day-to-day lives, said Cristina Thomas, the lead of the mission's observations working group at Northern Arizona University who was not involved with the study. And "this has overarching implications for planetary defense." DART showed that a tiny spacecraft can deflect an asteroid. But the study indicates that crashing a similarly disjointed space rock too forcefully risks fragmenting it, which, in a real asteroid emergency, could create multiple Earthbound asteroids. Planetary defense, as a concept, clearly works. "We know we can do it," said Federica Spoto, an asteroid dynamics researcher at the Center for Astrophysics, Harvard and Smithsonian, who was not involved with the new study. "But we have to do it right."

At CNN's product review site, one electronics reporter wrote they were "dumbfounded", "surprised," and "shocked" by the transparent screen on Lenovo's ThinkBook Transparent Display prototype. "This Micro LED screen is no slouch, either; a Full HD panel with up to 1,000 nits of brightness..." Let's get the big issue out of the way early: Lenovo is merely boasting what it can do, not what it will do. That's what a "concept" product means, of course. That said, it's still the most exciting thing I've seen in laptops in quite some time...

Thinking of major use cases for such a laptop, I basically considered any time you're out in public and want a more complete world view. While websites with white backgrounds look more opaque than transparent, the black backgrounds of a Notepad document and animations of space and fish fit the experience much better, as I could see the plants that Lenovo had placed behind the screen. The more websites use dark modes, the better this will go, too. Admittedly, I can also imagine some will blanch at the fact that such a laptop completely removes your privacy as a user. From those shopping for loved ones in the same room to those working on important business documents, the ThinkBook Transparent Display laptop could use a non-transparent mode, just like the LG OLED T offers. That said, I'm sure teachers would love to see what their kids are working on in the classroom.
The Verge calls it "an exceptionally cool-looking device that's capable of some fun novelties." The key draw is its bezel-less 17.3-inch MicroLED display, which offers up to 55 percent transparency when its pixels are set to black and turned off. But as its pixels light up, the display becomes less and less see-through, until eventually, you're looking at a completely opaque white surface with a peak brightness of 1,000 nits... How often, of course, do you actually want to see the empty desk behind your laptop? Would it be beneficial to be able to see your colleague sitting across from you, or would it be distracting? One of Lenovo's big ideas is that the form factor could be useful for digital artists, helping them to see the world behind the laptop's screen while sketching it on the lower half of the laptop where the keyboard is (more on this later).... 720p still feels like a very work-in-progress spec on a 17.3-inch laptop like this, but at least text shown on the screen during my demo was perfectly readable... Lenovo's transparent laptop concept feels like a collection of cool technologies in search of a killer app.
And yet Lenovo's executive director of ThinkPad portfolio and product Tom Butler tells the Verge he has "very high confidence" this will be in a real laptop within the next five years. (The Verge add that he "hopes that revealing this proof of concept will start a public conversation about what it could be useful for, setting a target for Lenovo to work toward.")

But would you use a laptop with a transparent screen?

Popular Science points out that for encoding data, "optical disks almost always offer just a single, 2D layer — that reflective, silver underside."

"If you could boost a disk's number of available, encodable layers, however, you could hypothetically gain a massive amount of extra space..." Researchers at the University of Shanghai for Science and Technology recently set out to do just that, and published the results earlier this week in the journal, Nature. Using a 54-nanometer laser, the team managed to record a 100 layers of data onto an optical disk, with each tier separated by just 1 micrometer. The final result is an optical disk with a three-dimensional stack of data layers capable of holding a whopping 1 petabit (Pb) of information — that's equivalent to 125,000 gigabytes of data...

As Gizmodo offers for reference, that same petabit of information would require roughly a six-and-a-half foot tall stack of HHD drives — if you tried to encode the same amount of data onto Blu-rays, you'd need around 10,000 blank ones to complete your (extremely inefficient) challenge.

To pull off their accomplishment, engineers needed to create an entirely new material for their optical disk's film... AIE-DDPR film utilizes a combination of specialized, photosensitive molecules capable of absorbing photonic data at a nanoscale level, which is then encoded using a high-tech dual-laser array. Because AIE-DDPR is so incredibly transparent, designers could apply layer-upon-layer to an optical disk without worrying about degrading the overall data. This basically generated a 3D "box" for digitized information, thus exponentially raising the normal-sized disk's capacity.
Thanks to long-time Slashdot reader hackingbear for sharing the news.

Netflix's new sci-fi drama Spaceman centers on Czech astronaut Jakub Procházk, described by Polygon as "painfully introverted, emotionally repressed, and above all, quiet... so muted and compressed, he seems like a trauma victim." The film, adapted from the 2017 novel Spaceman of Bohemia written by Czech author Jaroslav KalfaÅ(TM), is a solemn drama in the mold of Andrei Tarkovsky's Solaris, or to some degree, Christopher Nolan's Interstellar. The story revolves around Jakub's disintegrating frame of mind after eight months alone in space as he investigates a glowing cosmic phenomenon that's become visible from Earth. Meanwhile, his wife Lenka (Carey Mulligan), heavily pregnant and going through her own breakdown back home, decides to leave Jakub, and his handlers (Isabella Rossellini among them) work to keep him from finding out. And then the giant spider appears, and Jakub worries that he's losing his mind.
CNN says Sandler's deal with Netflix "means pretty much doing whatever he wants, which, in the case of Spaceman, means traveling to the furthest reaches of space as the near-solitary star of a pretentious, message-heavy drama."

You can watch a trailer here. The movie enjoys a "limited theatrical release" this weekend, and will stream on Netflix starting March 1.

In 2019 a SpaceX Falcon 9 rocket launched an Israeli spacecraft carrying a 30-million page archive of human civilization to the moon. Unfortunately, that spacecraft crashed. But thanks to this week's moon landing by the Odysseus, there's now a 30-million page "Lunar Library" on the moon — according to a Medium post by the Arch Mission Foundation.

"This historic moment secures humanity's cultural heritage and knowledge in an indestructible archive built to last for up to billions of years." Etched onto thin sheets of nickel, called NanoFiche, the Lunar Library is practically indestructible and can withstand the harsh conditions of space... Some of the notable content includes:


The Wikipedia. The entire English Wikipedia containing over 6 million articles on every branch of knowledge.
Project Gutenberg. Portions of Project Gutenberg's library of over 70,000 free eBooks containing some of our most treasured literature.
The Long Now Foundation's Rosetta Project archive of over 7,000 human languages and The Panlex datasets.
Selections from the Internet Archive's collections of books and important documents and data sets.
The SETI Institute's Earthling Project, featuring a musical compilation of 10,000 vocal submissions representing humanity united
The Arch Lunar Art Archive containing a collection of works from global contemporary and digital artists in 2022, recorded as NFTs.
David Copperfield's Magic Secrets — the secrets to all his greatest illusions — including how he will make the Moon disappear in the near future.
The Arch Mission Primer — which teaches a million concepts with images and words in 5 languages.
The Arch Mission Private Library — containing millions of pages as well as books, documents and articles on every subject, including a broad range of fiction and non-fiction, textbooks, periodicals, audio recordings, videos, historical documents, software sourcecode, data sets, and more.
The Arch Mission Vaults — private collections, including collections from our advisors and partners, and a collection of important texts and images from all the world's religions including the great religions and indigenous religions from around the world, collections of books, photos, and a collection of music by leading recording artists, and much more content that may be revealed in the future...


We also want to recognize our esteemed advisors, and our many content partners and collections including the Wikimedia Foundation, the Long Now Foundation, The SETI Institute Earthling Project, the Arch Lunar Art Archive project, Project Gutenberg, the Internet Archive, and the many donors who helped make the Lunar Library possible through their generous contributions. This accomplishment would not have happened without the collaborative support of so many...

We will continue to send backups of our important knowledge and cultural heritage — placing them on the surface of the Earth, in caves and deep underground bunkers and mines, and around the solar system as well. This is a mission that continues as long as humanity endures, and perhaps even long after we are gone, as a gift for whoever comes next.
Space.com has a nice rundown of the other new payloads that just landed on the moon. Some highlights:

• "Cloud computing startup Lonestar's Independence payload is a lunar data center test mission for data storage and transmission from the lunar surface."
• LRA is a small hemisphere of light-reflectors built to servce as a precision landmark to "allow spacecraft to ping it with lasers to help them determine their precise distance..."
• ROLSES is a radio spectrometer for measuring the electron density near the lunar surface, "and how it may affect radio observatories, as well as observing solar and planetary radio waves and other phenomena."
• "Artist Jeff Koons is sending 125 miniature stainless steel Moon Phase sculptures, each honoring significant human achievements across cultures and history, to be displayed on the moon in a cube. "

On Wednesday afternoon "a European Space Agency satellite reentered Earth's atmosphere over the North Pacific Ocean..." reports CNN, "and there have been no reports of damage, according to the agency." The agency's Space Debris Office, along with an international surveillance network, monitored and tracked the Earth-observing ERS-2 satellite throughout February to make predictions about the reentry, which occurred at 12:17 p.m. ET Wednesday. The ESA provided continuous live updates on its website. At around 50 miles (80 kilometers) above Earth's surface, the satellite broke apart due to atmospheric drag, and the majority of the fragments were expected to burn up in the atmosphere.

The agency said it was possible that some fragments could reach the planet's surface, but the pieces didn't contain any harmful substances and likely fell into the ocean... The ERS-2 satellite had an estimated mass of 5,057 pounds (2,294 kilograms) after depleting its fuel, according to the agency. "Uncontrolled Atmospheric reentry has long been a common method for disposing of space objects at the end of their mission," said Tim Flohrer, head of the agency's Space Debris Office, in a statement. "We see objects similar in size or larger to ERS-2 reentering the atmosphere multiple times each year."

The Earth-observing ERS-2 satellite first launched on April 21, 1995, and it was the most sophisticated satellite of its kind at the time to be developed and launched by Europe... In 2011, the agency decided to end the satellite's operations and deorbit it, rather than adding to the swirl of space junk orbiting the planet. The satellite executed 66 deorbiting maneuvers in July and August of 2011 before the mission officially concluded later that year on September 11. The maneuvers burned through the rest of the satellite's fuel and decreased its altitude, setting ERS-2's orbit on a trajectory to slowly spiral closer to Earth and reenter the atmosphere within 15 years.

The chances of an individual person being injured by space debris each year are less than 1 in 100 billion, about 1.5 million times lower than the risk of being killed in an accident at home, according to the agency.