Spirit Aerosystems builds aircraft components, including fuselages and flight deck sections for Boeing, according to Wikipedia. But now Boeing is set to acquire Spirit AeroSystems.

The aviation blog called Aviation Source News says the price tag was $4.7 billion, and opines that Boeing's move signals "a renewed focus on quality and supply chain stability" as Boeing "addresses lingering concerns surrounding its 737 program." Spirit's recent struggles with quality control and production delays have had a fallout effect for Boeing... By integrating Spirit's operations, Boeing can implement more stringent oversight and ensure consistent manufacturing processes. This move is a direct response to past quality lapses that have plagued the company and damaged its reputation. Beyond quality control, the acquisition also offers Boeing greater control over its supply chain. By bringing a key supplier in-house, Boeing can streamline production, improve coordination, and reduce the risk of future disruptions...

Spirit AeroSystems also supplies parts to Airbus, Boeing's main competitor. To address this, a separate agreement is being negotiated for Airbus to acquire Spirit's Airbus-related business. This strategic move ensures that Airbus maintains control over its own supply chain and prevents Boeing from gaining undue influence over its competitor's production.
Meanwhile, the vice president leading Boeing's Starliner spacecraft unit "has left his role in the program and been replaced by the company's International Space Station program manager, John Mulholland," Reuters reports, citing a Boeing spokesperson. In its first test mission last summer flying astronauts, Starliner was forced by NASA to leave its crew aboard the ISS and return empty in September over problems with its propulsion system. A panel of senior NASA officials in August had voted to have a Crew Dragon capsule from Elon Musk's SpaceX bring them back instead, deeming Starliner too risky for the astronauts.

Paul Hill, a veteran NASA flight director and member of the agency's Aerospace Safety Advisory Panel, said during a quarterly panel meeting on Thursday that NASA and Boeing continue to investigate Starliner's propulsion system. A Boeing spokesperson said on Thursday that the company and NASA have not yet determined what Starliner's next mission will look like, such as whether it will need to repeat its crewed flight test before receiving NASA certification for routine flights.

An anonymous reader shared this report from the Washington Post: Scientists have found that using seismometers is a new and inexpensive method to detect falling space junk, which can cause damage on impact and carry toxic materials — and may someday turn deadly...

It's not an easy task to track large hunks of falling metal everywhere in the world. Ground-based radar can detect falling objects, but it doesn't cover much of the world or is often classified data, said Ben Fernando [a planetary scientist at Johns Hopkins University who is leading this research]. The other option is through optical instruments, such as doorbell cameras, but the information on the time, size and speed can be limited. Instead, Fernando turned to seismology data. Stations located around the world live-stream data, which can be easily downloaded. Seismometers have been used to track meteors in the sky for over a century, but he said this is the first time he's aware of its use for tracking space debris.

Stations located around the world live-stream data, which can be easily downloaded. Seismometers have been used to track meteors in the sky for over a century, but he said this is the first time he's aware of its use for tracking space debris. Fernando first tested the idea to track the controlled reentry of NASA's OSIRIS-REx mission in September 2023, which brought back material from the asteroid Bennu. He set up seismometers along the capsule's path in the landing spot in Utah and measured its sonic boom. "It's a really good way of monitoring what's coming in, how often it's coming in, how big the things hitting the Earth are," said Fernando, who presented his results at the American Geophysical Union conference in December...

"The shockwave deforms the ground around the seismometer," said Fernando. "It also keeps ringing for a lot longer because all of that energy is bouncing around in the soil...." [H]e said an automated system could help detect these objects within moments of it appearing on the stations. In addition to detecting an event, the seismometers can help locate where any debris may have fallen. Tracking debris is important because some space debris can contain toxic materials that can harm the surrounding environment.
The article notes reports of the uncontrolled reentry into Earth's atmosphere of at least 951 objects larger than one square meter from 2010 to 2022.

"On average, objects heavier than 1,000 pounds came down about every 8 days... In fact, the threat of getting hit by uncontrolled orbital reentries has increased by a factor of four from 2010 to 2023, said Luciano Anselmo, who published a study assessing the risk."

Bill Gates' blog has been updated with short videos about his upcoming book, including one about how his school ended up with an ASR-33 teletype that could connect their Seattle classroom to a computer in California. "The teachers faded away pretty quickly," Gates adds, "But about six of us stayed hardcore. One was Paul Allen..." — the future co-founder of Microsoft. And the experience clearly meant a lot to Gates. "Microsoft just never would've happened without Paul — and this teletype room."

In a longer post thanking his "brilliant" teachers, Gates calls his teletype experience "an encounter that would shape my entire future" and "opened up a whole new world for me." Gates also thanks World War II Navy pilot and Boeing engineer Bill Dougall, who "was instrumental in bringing computer access to our school, something he and other faculty members pushed for after taking a summer computer class... The fascinating thing about Mr. Dougall was that he didn't actually know much about programming; he exhausted his knowledge within a week. But he had the vision to know it was important and the trust to let us students figure it out."

Gates shared a similar memory about the computer-room's 20-something overseer Fred Wright, who "intuitively understood that the best way to get students to learn was to let us explore on our own terms. There was no sign-up sheet, no locked door, no formal instruction." Instead, Mr. Wright let us figure things out ourselves and trusted that, without his guidance, we'd have to get creative... Some of the other teachers argued for tighter regulations, worried about what we might be doing in there unsupervised. But even though Mr. Wright occasionally popped in to break up a squabble or listen as someone explained their latest program, for the most part he defended our autonomy...

Mr. Wright gave us something invaluable: the space to discover our own potential.
Any Slashdot readers have a similarly impactful experience? Share your own thoughts and memories in the comments.

Do you remember your high school's computer room?

An anonymous reader quotes a report from VICE News: EVA AI, a platform allowing you to create and connect with your own AI partner, recently surveyed 2,000 men and found that 8 in 10 would consider marrying an AI girlfriend if it were legal. Not only that, but 83% of men also believe they could form a deep emotional bond with an AI girlfriend. What's even scarier is that a whopping 78% of men surveyed said they would consider creating a replica of their ex, and three-quarters would duplicate their current partner to create a "polished" version of them. "AI companionship allows people to be their authentic selves without fear of judgment," said Cale Jones, head of community growth at EVA AI. "It creates a safe space to explore thoughts, emotions, and desires that might feel too vulnerable to share in real life. The benefits extend far beyond the virtual world: one EVA AI user discovered her bisexuality through this platform -- something she previously felt too insecure to explore in real life."

An anonymous reader quotes a report from MIT Technology Review: A Canadian startup called Xanadu has built a new quantum computer it says can be easily scaled up to achieve the computational power needed to tackle scientific challenges ranging from drug discovery to more energy-efficient machine learning. Aurora is a "photonic" quantum computer, which means it crunches numbers using photonic qubits -- information encoded in light. In practice, this means combining and recombining laser beams on multiple chips using lenses, fibers, and other optics according to an algorithm. Xanadu's computer is designed in such a way that the answer to an algorithm it executes corresponds to the final number of photons in each laser beam. This approach differs from one used by Google and IBM, which involves encoding information in properties of superconducting circuits.

Aurora has a modular design that consists of four similar units, each installed in a standard server rack that is slightly taller and wider than the average human. To make a useful quantum computer, "you copy and paste a thousand of these things and network them together," says Christian Weedbrook, the CEO and founder of the company. Ultimately, Xanadu envisions a quantum computer as a specialized data center, consisting of rows upon rows of these servers. This contrasts with the industry's earlier conception of a specialized chip within a supercomputer, much like a GPU. [...]

Xanadu's 12 qubits may seem like a paltry number next to IBM's 1,121, but Tiwari says this doesn't mean that quantum computers based on photonics are running behind. In his opinion, the number of qubits reflects the amount of investment more than it does the technology's promise. [...] Xanadu's next goal is to improve the quality of the photons in the computer, which will ease the error correction requirements. "When you send lasers through a medium, whether it's free space, chips, or fiber optics, not all the information makes it from the start to the finish," he says. "So you're actually losing light and therefore losing information." The company is working to reduce this loss, which means fewer errors in the first place. Xanadu aims to build a quantum data center, with thousands of servers containing a million qubits, in 2029. The company published its work on chip design optimization and fabrication in the journal Nature.

Mr. Dollar Ton shares a report from the BBC: The chemical building blocks of life have been found, among many other complex chemical compounds, in the grainy dust of an asteroid called Bennu, an analysis reveals. Samples of the space rock, which were scooped up by a Nasa spacecraft and brought to Earth, contain a rich array of minerals and thousands of organic compounds. These include amino acids, which are the molecules that make up proteins, as well as nucleobases -- the fundamental components of DNA. The findings are published in two papers in the journal nature.

Astronomers have discovered a newly identified asteroid that has a 1-in-83 chance of striking Earth on December 22, 2032, though the most likely scenario is a close miss. Designated as 2024 YR4, the asteroid measures in at 196 feet wide and is currently 27 million miles away. Space.com reports: The near-Earth object (NEO) discovered in 2024, which is around half as wide as a football field is long, will make a very close approach to Earth on Dec. 22, 2032. It's estimated to come within around 66,000 miles (106,200 kilometers) of Earth on that day, according to NASA's Center of NEO Studies (CNEOS). However, when orbital uncertainties are considered, that close approach could turn out to be a direct hit on our planet.

Such an impact could cause an explosion in the atmosphere, called an "airburst," or could cause an impact crater when it slams into the ground. This is enough to see asteroid 2024 YR4 leap to the top of the European Space Agency's NEO impact Risk List and NASA's Sentry Risk Table. "People should absolutely not worry about this yet," said Catalina Sky Survey engineer and asteroid hunter David Rankin. "Impact probability is still very low, and the most likely outcome will be a close approaching rock that misses us."

As for where it could hit Earth, Rankin said that the "risk corridor" for impact runs from South America across the Atlantic to sub-Saharan Africa.

The XB-1, a civilian supersonic jet developed by Boom Supersonic, successfully broke the sound barrier during a test flight over the Mojave Desert. It reached an altitude of 35,290 feet before accelerating to Mach 1.22, the company said in a press release. CBS News reports: It marks the first time an independently developed jet has broken the sound barrier, Boom Supersonic said, and the plane is the "first supersonic jet made in America." The sound barrier was broken for the first time in 1947, when Air Force pilot Capt. Chuck Yeager flew a rocket-propelled experimental aircraft across the Mojave Desert -- taking off from the Mojave Air and Space Port just as the XB-1 did. [...]

The company will next focus its attention on Overture, a supersonic airliner that will ultimately "bring the benefits of supersonic flight to everyone," Boom Supersonic founder and CEO Blake Scholl said in a statement. The XB-1 jet will be the foundation for Overture, Boom Supersonic said, and many features present on the jet will also be incorporated into the supersonic airliner. The airliner will also use Boom Supersonic's bespoke propulsion system, Symphony, to run on "up to 100% sustainable aviation fuel."

The company said the goal for the plane is for it to be able to carry between 64 and 80 passengers at Mach 1.7, or about 1,295 miles per hour. Existing subsonic airliners fly at between 550 and 600 miles per hour, according to charter company Bitlux. About 130 Overture planes have been pre-ordered, the company said. Airlines including American Airlines, United Airlines and Japan Airlines have placed pre-orders. The company finished building a "superfactory" in North Carolina in 2024, and will eventually produce 66 planes per year.

Founded in 1947, the Minor Planet Center is the official worldwide authority "for observing and reporting new asteroids, comets and other small bodies in the solar system," reports USA Today.

Unfortunately, "What an amateur astronomer recently took to be a newly discovered asteroid turned out to be a Tesla Roadster," The Minor Planet Center didn't initially consider the possibility when the organization announced the discovery on Jan. 2 of the unusual asteroid, complete with an official name: 2018 CN41. But less than 17 hours later, the Minor Planet Center issued an editorial notice that it would be deleting 2018 CN41 from its records... According to the Minor Planet Center's notice regarding the deletion, turns out the object was the Roadster, along with the Falcon Heavy rocket's upper stage.

NASA's Hubble Space Telescope has released the largest ever photomosaic featuring over 200 million stars -- all of which are bright than our own Sun. It consists of over 600 overlapping Hubble images and 2.5 billion pixels. "That is a huge number, yet only a fraction of the estimated one trillion stars in the Andromeda galaxy," reports TechSpot. "Many of Andromeda's less massive stars are beyond Hubble's sensitivity limit and thus, are not represented in the imaged."

"NASA has multiple sizes of the panoramic available for download, including the full-size 203 MB image (42,208 x 9,870) and a more user friendly 9 MB variant (10,552 x 2,468)."

The Linux 6.14 kernel now maps out support for Microsoft's "Copilot" key "so that user-space software can determine the behavior for handling that key's action on the Linux desktop," writes Phoronix's Michael Larabel. From the report: A change made to the atkbd keyboard driver on Linux now maps the F23 key to support the default copilot shortcut action. The patch authored by Lenovo engineer Mark Pearson explains [...]. Now it's up to the Linux desktop environments for determining what to do if the new Copilot key is pressed. The patch was part of the input updates now merged for the Linux 6.14 kernel.

Google will remove URL breadcrumbs from mobile search results globally, displaying only domain names instead of the full hierarchical path marked by ">" symbols, the company said.

The change affects all smartphone and tablet searches while desktop results remain unchanged. The company said it made the change because of limited screen space, noting breadcrumbs often get cut off on smaller displays.

Bruce Schneier and Nathan E. Sanders, writing in a post: Someone who makes calculus mistakes is also likely to respond "I don't know" to calculus-related questions. To the extent that AI systems make these human-like mistakes, we can bring all of our mistake-correcting systems to bear on their output. But the current crop of AI models -- particularly LLMs -- make mistakes differently.

AI errors come at seemingly random times, without any clustering around particular topics. LLM mistakes tend to be more evenly distributed through the knowledge space. A model might be equally likely to make a mistake on a calculus question as it is to propose that cabbages eat goats. And AI mistakes aren't accompanied by ignorance. A LLM will be just as confident when saying something completely wrong -- and obviously so, to a human -- as it will be when saying something true. The seemingly random inconsistency of LLMs makes it hard to trust their reasoning in complex, multi-step problems. If you want to use an AI model to help with a business problem, it's not enough to see that it understands what factors make a product profitable; you need to be sure it won't forget what money is.

[...] Humans may occasionally make seemingly random, incomprehensible, and inconsistent mistakes, but such occurrences are rare and often indicative of more serious problems. We also tend not to put people exhibiting these behaviors in decision-making positions. Likewise, we should confine AI decision-making systems to applications that suit their actual abilities -- while keeping the potential ramifications of their mistakes firmly in mind.

Scientists have detected cosmic "chorus waves" resembling bird chirps over 62,000 miles from Earth, a region where such waves have never been observed. "Scientists still aren't sure how the perturbations happen, but they think Earth's magnetic field may have something to do with it," reports the Associated Press. From the report: The chorus has been picked up on radio antennas for decades, including receivers at an Antarctica research station in the 1960s. And twin spacecraft -- NASA's Van Allen Probes -- heard the chirps from Earth's radiation belts at a closer distance than the newest detection. The latest notes were picked up by NASA's Magnetospheric Multiscale satellites, launched in 2015 to explore the Earth and sun's magnetic fields. The new research was published Wednesday in the journal Nature.

Chorus waves have also been spotted near other planets including Jupiter and Saturn. They can even produce high-energy electrons capable of scrambling satellite communications. "They are one of the strongest and most significant waves in space," said study author Chengming Liu from Beihang University in an email. The newfound chorus waves were detected in a region where Earth's magnetic field is stretched out, which scientists didn't expect. That raises fresh questions about how these chirping waves form. "It's very captivating, very compelling," Jaynes said. "We definitely need to find more of these events."

An anonymous reader shares a report: Brendan Carr is now formally the chair of the Federal Communications Commission, giving him the power to set the agency's agenda and usher through a host of regulations with major implications for the tech and media industries as soon as he has a Republican majority. In a statement, Carr named a few areas of focus: "issues ranging from tech and media regulation to unleashing new opportunities for jobs and growth through agency actions on spectrum, infrastructure, and the space economy."

Carr's priorities might also be gleaned from a document you might have already heard about: Project 2025. That's because he authored the FCC chapter of the Heritage Foundation's wishlist for a Donald Trump presidency. In that chapter, Carr proposes actions including: limiting immunity for tech companies under Section 230 of the Communications Decency Act, requiring disclosures about how platforms prioritize content, requiring tech companies to pay into a program that funds broadband access in rural areas, and more, quickly approving applications to launch satellites from companies like Elon Musk's Starlink.

Amazon has angered its workers again "after forcing them to return to the office five days a week," reports the New York Post. The problem? "Not enough desks for everyone." (As well as "packed parking lots" that are turning some workers away.)

The Post cites interviews conducted with seven Amazon employees by Business Insider (which notes that in mid-December Amazon had already delayed full return-to-office at dozens of locations, sometimes until as late as May, because of office-capacity issues).

Here in mid-January, the Post writes, many returning-to-office workers still aren't happy: Some meeting rooms have not had enough chairs — and there also have not been enough meeting rooms for everyone, one worker told the publication... [S]imply reaching the office is a challenge in itself, according to the report. Some complained they were turned away from company parking lots that were full, while others griped about having to join meetings from the road due to excess traffic on their way to the office, according to the Slack messages. Once staffers conquer the challenges of reaching the office and finding a desk, some lamented the lack of in-person discussions since many of the meetings remain virtual, according to BI.
Amazon acknowledged they had offices that were "not quite ready" to "welcome everyone back a full five days a week," according to Post, though Amazon believed the number of not-quite-ready offices were "relatively small".

But the parking lot situation may continue. Business Insider says one employee from Amazon's Nashville office "said the wait time for a company parking pass was backed up for months." (Although another Nashville staffer said Amazon was handing out passes for them to take mass-transit for free, which they'd described as "incredibly generous.")

There's also Amazon shuttle busses, according to the article. Although other staffers "said they were denied a spot on Amazon shuttle buses because the vehicles were full..." Others said they just drove back home, while some staffers found street parking nearby, according to multiple Slack messages seen by Business Insider...

This month, some employees were still questioning the logic behind the policy. They said being in the office has had little effect on their work routine and has not generated much of a productivity gain. A considerable portion of their in-office work is still being done through video calls with customers who are elsewhere, these employees told BI. Many Amazon colleagues are at other office locations, so face-to-face meetings still don't happen very often, they added.
The Post adds another drawback of returning to the office. "Employees at Amazon's Toronto office said their personal belongings have repeatedly been stolen from their desks."

America's outgoing national security adviser has "wide access to the world's secrets," writes Axios, adding that the security adviser delivered a "chilling" warning that "The next few years will determine whether AI leads to catastrophe — and whether China or America prevails in the AI arms race."

But in addition, Sullivan "said in our phone interview that unlike previous dramatic technology advancements (atomic weapons, space, the internet), AI development sits outside of government and security clearances, and in the hands of private companies with the power of nation-states... 'There's going to have to be a new model of relationship because of just the sheer capability in the hands of a private actor,' Sullivan says..." Somehow, government will have to join forces with these companies to nurture and protect America's early AI edge, and shape the global rules for using potentially God-like powers, he says. U.S. failure to get this right, Sullivan warns, could be "dramatic, and dramatically negative — to include the democratization of extremely powerful and lethal weapons; massive disruption and dislocation of jobs; an avalanche of misinformation..."

To distill Sullivan: America must quickly perfect a technology that many believe will be smarter and more capable than humans. We need to do this without decimating U.S. jobs, and inadvertently unleashing something with capabilities we didn't anticipate or prepare for. We need to both beat China on the technology and in shaping and setting global usage and monitoring of it, so bad actors don't use it catastrophically. Oh, and it can only be done with unprecedented government-private sector collaboration — and probably difficult, but vital, cooperation with China...

There's no person we know in a position of power in AI or governance who doesn't share Sullivan's broad belief in the stakes ahead...

That said, AI is like the climate: America could do everything right — but if China refuses to do the same, the problem persists and metastasizes fast. Sullivan said Trump, like Biden, should try to work with Chinese leader Xi Jinping on a global AI framework, much like the world did with nuclear weapons.
"I personally am not an AI doomer," Sullivan says in the interview. "I am a person who believes that we can seize the opportunities of AI. But to do so, we've got to manage the downside risks, and we have to be clear-eyed and real about those risks."

Thanks to long-time Slashdot reader Mr_Blank for sharing the article.

CNN has the latest on "a startling discovery made public in July that metallic rocks were apparently producing oxygen on the Pacific Ocean's seabed, where no light can penetrate.

"Initial research suggested potato-size nodules rich in metals, predominantly found 4,000 meters (13,100 feet) below the surface in the Clarion-Clipperton Zone, released an electrical charge, splitting seawater into oxygen and hydrogen through electrolysis." The unprecedented natural phenomenon challenges the idea that oxygen can only be made from sunlight via photosynthesis. Andrew Sweetman, a professor at the UK's Scottish Association for Marine Science who was behind the find, is embarking on a three-year project to investigate the production of "dark" oxygen further... Uncovering dark oxygen revealed just how little is known about the deep ocean, and the Clarion-Clipperton Zone, or CCZ, in particular. The region is being explored for the deep-sea mining of rare metals contained in the rock nodules. The latter are formed over millions of years, and the metals play a key role in new and green technologies...

Understanding the phenomenon better could also help space scientists find life beyond Earth, [Sweetman] added... Officials at NASA are interested in the research on dark oxygen production because it could inform scientific understanding of how life might be sustained on other planets without direct sunlight, Sweetman said. The space agency wants to run experiments to understand the amount of energy required to potentially produce oxygen at higher pressures that occur on Enceladus and Europa, the icy moons of Saturn and Jupiter, respectively, he added. Those moons are among the targets for investigating the possibility of life.

Deep-sea mining companies are aiming to mine the cobalt, nickel, copper, lithium and manganese contained in the nodules for use in solar panels, electric car batteries and other green technology. Some companies have taken issue with Sweetman's research. Critics say deep-sea mining could irrevocably damage the pristine underwater environment and that it could disrupt the way carbon is stored in the ocean, contributing to the climate crisis.
CNN's article also notes Massachusetts microbiologist Emil Ruff, who found unexpected oxygen far below the Canadian prairie in water isolated from the atmosphere for more than 40,000 years.

"Nature keeps surprising us," he said. "There are so many things that people have said, 'Oh, this is impossible,' and then later it turns out it's not."

"The universe is expanding faster than predicted by theoretical models," writes Phys.org, "and faster than can be explained by our current understanding of physics." There's now been new confirmation of this (published in The Astrophysical Journal Letters) by a team led by Dan Scolnic, an associate professor of physics at Duke University.

And this means the so-called Hubble tension "now turns into a crisis," said Dan Scolnic, who led the research team... This is saying, to some respect, that our model of cosmology might be broken." Measuring the universe requires a cosmic ladder, which is a succession of methods used to measure the distances to celestial objects, with each method, or "rung," relying on the previous for calibration. The ladder used by Scolnic was created by a separate team using data from the Dark Energy Spectroscopic Instrument (DESI), which is observing more than 100,000 galaxies every night from its vantage point at the Kitt Peak National Observatory. Scolnic recognized that this ladder could be anchored closer to Earth with a more precise distance to the Coma Cluster, one of the galaxy clusters nearest to us. "The DESI collaboration did the really hard part, their ladder was missing the first rung," said Scolnic. "I knew how to get it, and I knew that that would give us one of the most precise measurements of the Hubble constant we could get, so when their paper came out, I dropped absolutely everything and worked on this non-stop."

To get a precise distance to the Coma cluster, Scolnic and his collaborators used the light curves from 12 Type Ia supernovae within the cluster. Just like candles lighting a dark path, Type Ia supernovae have a predictable luminosity that correlates to their distance, making them reliable objects for distance calculations. The team arrived at a distance of about 320 million light-years, nearly in the center of the range of distances reported across 40 years of previous studies — a reassuring sign of its accuracy. "This measurement isn't biased by how we think the Hubble tension story will end," said Scolnic. "This cluster is in our backyard, it has been measured long before anyone knew how important it was going to be."
The results? "It matches the universe's expansion rate as other teams have recently measured it," writes Phys.org, "but not as our current understanding of physics predicts it. The longstanding question is: is the flaw in the measurements or in the models? Scolnic's team's new results add tremendous support to the emerging picture that the root of the Hubble tension lies in the models..."

And the article closes with this quote from Scolnic: "Ultimately, even though we're swapping out so many of the pieces, we all still get a very similar number. So, for me, this is as good of a confirmation as it's ever gotten. We're at a point where we're pressing really hard against the models we've been using for two and a half decades, and we're seeing that things aren't matching up," said Scolnic.

"This may be reshaping how we think about the universe, and it's exciting! There are still surprises left in cosmology, and who knows what discoveries will come next?"

"The next great space telescope will study distant galaxies and faraway planets from an orbital outpost about a million miles from Earth," writes the Washington Post. "But first it has to be put together, piece by piece, in a cavernous chamber at the NASA Goddard Space Flight Center in Greenbelt, Maryland."

One long-time NASA worker calls it "the largest clean room in the free world," and the Post notes everyone wears white gowns and surgical masks "to keep hardware from being contaminated by humans. No dust allowed. No stray hairs. One wall is entirely covered by HEPA filters." The place is known as the Clean Room, or sometimes the High Bay. It is 125 feet long, 100 feet wide, 90 feet high, with almost as much volume as the Capitol Rotunda. NASA boasts that in the Clean Room you could put nearly 30 tractor-trailers side by side on the floor and stack them 10 high... About two dozen workers clustered around towering pieces of hardware, some twice or three times the height of a typical person. When stacked and integrated, these components will form the Nancy Grace Roman Space Telescope.

The assembly of the telescope ramped up this fall, with 600 workers aiming to get everything integrated and tested by late 2026. NASA has committed to launching the telescope no later than May 2027. The telescope will be roughly the size of the Hubble Space Telescope, but not quite as long (a "stubby Hubble," some call it). What the astronomy community and the general public will receive in exchange for the considerable taxpayer investment of nearly $4 billion is an instrument that can do what other telescopes can't.

It will have a sprawling field of view, about 100 times that of the Hubble or Webb space telescopes. And it will be able to pivot quickly across the night sky to new targets and download tremendous amounts of data that will be instantly available to the researchers. A primary goal of the Roman is to understand "dark energy," the mysterious driver of the accelerating expansion of space. But it will also attempt to study the atmospheres of exoplanets — worlds orbiting distant stars...

The main element, informally referred to as "the telescope" but officially called the "optical telescope assembly," showed up this fall. It was originally built as a spy satellite for the National Reconnaissance Office. That's right: It was built to look down at Earth, rather than at the rest of the universe. The NRO decided more than a decade ago that it didn't need it, and gave it, along with another, identical spy satellite, to NASA. Roman's wide-angle view of deep space, its maneuverability and ability to download massive amounts of data makes it optimized as a dark energy telescope. And it will also study the effects of dark matter, which comprises about 25 percent of the universe but remains a ghostly presence.