Commercial space efforts continue around the world, as the Chinese company Space Pioneer fired up a partially-fueled rocket engine Sunday for a short-duration test of its reusable rocket on the ground. But Space News reports that the test "ended in catastrophic failure and a dramatic explosion."

"Amateur footage captured by Gongyi citizens and posted on Chinese social media shows the nine-engine test stage igntiing and then, exceptionally, taking off." Hold-down clamps and other structures are typically used to securely keep stages in place. The stage is seen climbing into the sky before halting, apparently with its engines shutting off, and returning to Earth. The stage impacted the ground around 50 seconds after it took off, apparently with much of its kerosene-liquid oxygen propellant remaining, causing a large explosion.

The Tianlong-3 first stage would likely fire for a number of minutes on an orbital flight. Space Pioneer was conducting its test as a buildup to an orbital launch of the Tianlong-3, which is benchmarked against the SpaceX Falcon 9, in the coming months. The company announced earlier this month that it has secured $207 million in new funding.

Shanghai-based digital newspaper The Paper reported Henan officials as saying there were no casualties reported. Space Pioneer issued its own statement later, stating there was a structural failure at the connection between the rocket body and the test bench. The rocket's onboard computer automatically shut down the engines and the rocket fell 1.5 kilometers southwest. It reiterated earlier reports that no casualties were found. The company said the test produced 820 tons of thrust.
The article speculates on whether the event will delay the development of the rocket — or the planned launches for a Chinese megaconstellation of satellites. "Space Pioneer says it will conduct an analysis and restart testing with new hardware as soon as possible."

What if across the bottom of the Atlantic Ocean, six high-voltage power cables stretched — each over 2,000 miles long.

CNN reports that a group of entrepreneurs "wants to build what would be the world's largest subsea energy interconnector between continents, linking Europe and North America...to connect places like the United Kingdom's west with eastern Canada, and potentially New York with western France...

"The Europe-US cables could send 6 gigawatts of energy in both directions at the speed of light, said Laurent Segalen, founder of the London-based Megawatt-X renewable energy firm, who is also part of the trio proposing the transatlantic interconnector. That's equivalent to what six large-scale nuclear power plants can generate, transmitted in near-real time." The interconnector would send renewable energy both east and west, taking advantage of the sun's diurnal journey across the sky. "When the sun is at its zenith, we probably have more power in Europe than we can really use," said Simon Ludlam, founder and CEO of Etchea Energy, and one of the trio of Europeans leading the project. "We've got wind and we've also got too much solar. That's a good time to send it to a demand center, like the East Coast of the United States. Five, six hours later, it's the zenith in the East Coast, and obviously, we in Europe have come back for dinner, and we get the reverse flow," he added.

The transatlantic interconnector is still a proposal, but networks of green energy cables are starting to sprawl across the world's sea beds. They are fast becoming part of a global climate solution, transmitting large amounts of renewable energy to countries struggling to make the green transition alone. But they are also forging new relations that are reshaping the geopolitical map and shifting some of the world's energy wars down to the depths of the ocean...

Already, energy cables run between several countries in Europe, most of them allied neighbors. Not all of them carry renewable power exclusively — that's sometimes determined by what makes up each country's energy grid — âbut new ones are typically being built for a green energy future. The UK, where land space for power plants is limited, is already connected with Belgium, Norway, the Netherlands and Denmark under the sea. It has signed up to a solar and wind link with Morocco to take advantage of the North African country's many hours of sunlight and strong trade winds that run across the equator. Similar proposals are popping up around the globe. A project called Sun Cable seeks to send solar power from sunny Australia, where land is abundant, to the Southeast Asian nation of Singapore, which also has plenty of sun but very little room for solar farms. India and Saudi Arabia plan to link their respective power grids via the Arabian Sea, part of a broader economic corridor plan to connect Asia, the Middle East and Europe.

Slashdot reader Required Snark shared this article from Ars Technica: Almost exactly two years ago, as it prepared for the next generation of human spaceflight, NASA chose a pair of private companies to design and develop new spacesuits. These were to be new spacesuits that would allow astronauts to both perform spacewalks outside the International Space Station as well as walk on the Moon as part of the Artemis program. Now, that plan appears to be in trouble, with one of the spacesuit providers — Collins Aerospace — expected to back out, Ars has learned. It's a blow for NASA, because the space agency really needs modern spacesuits.

NASA's Apollo-era suits have long been retired. The current suits used for spacewalks in low-Earth orbit are four decades old. "These new capabilities will allow us to continue on the International Space Station and allows us to do the Artemis program and continue on to Mars," said the director of Johnson Space Center, Vanessa Wyche, during a celebratory news conference in Houston two years ago. The two winning teams were led by Collins Aerospace and Axiom Space, respectively. They were eligible for task orders worth up to $3.5 billion — in essence NASA would rent the use of these suits for a couple of decades. Since then, NASA has designated Axiom to work primarily on a suit for the Moon and the Artemis Program, and Collins with developing a suit for operations in-orbit, such as space station servicing...

The agency has been experiencing periodic problems with the maintenance of the suits built decades ago, known as the Extravehicular Mobility Unit, which made its debut in the 1980s. NASA has acknowledged the suit has exceeded its planned design lifetime. Just this Monday, the agency had to halt a spacewalk after the airlock had been de-pressurized and the hatch opened due to a water leak in the service and cooling umbilical unit of Tracy Dyson's spacesuit. As a result of this problem, NASA will likely only be able to conduct a single spacewalk this summer, after initially planning three, to complete work outside the International Space Station.
Collins designed the original Apollo suits, according to the article. But a person familiar with the situation told Ars Technica that "Collins has admitted they have drastically underperformed and have overspent" on their work, "culminating in a request to be taken off the contract or renegotiate the scope and their budget."

Ironically, the company's top's post on their account on Twitter/X is still a repost of NASA's February announcement that they're "getting a nextx-generation spacesuit" developed by Collins Aerospace, and saying that the company "recently completed a key NASA design milestone aboard a commercial microgravity aircraft."

NASA's post said they needed the suit "In order to advance NASA's spacewalking capabilities in low Earth orbit and to support continued maintenance and operations at the Space Station."

The Wall Street Journal reports that a European initiative studying the feasibility data centers in space "has found that the project could be economically viable" — while reducing the data center's carbon footprint.

And they add that according to coordinator Thales Alenia Space, the project "could also generate a return on investment of several billion euros between now and 2050." The study — dubbed Ascend, short for Advanced Space Cloud for European Net zero emission and Data sovereignty — was funded by the European Union and sought to compare the environmental impacts of space-based and Earth-based data centers, the company said. Moving forward, the company plans to consolidate and optimize its results. Space data centers would be powered by solar energy outside the Earth's atmosphere, aiming to contribute to the European Union's goal of achieving carbon neutrality by 2050, the project coordinator said... Space data centers wouldn't require water to cool them, the company said.
The 16-month study came to a "very encouraging" conclusion, project manager Damien Dumestier told CNBC. With some caveats... The facilities that the study explored launching into space would orbit at an altitude of around 1,400 kilometers (869.9 miles) — about three times the altitude of the International Space Station. Dumestier explained that ASCEND would aim to deploy 13 space data center building blocks with a total capacity of 10 megawatts in 2036, in order to achieve the starting point for cloud service commercialization... The study found that, in order to significantly reduce CO2 emissions, a new type of launcher that is 10 times less emissive would need to be developed. ArianeGroup, one of the 12 companies participating in the study, is working to speed up the development of such reusable and eco-friendly launchers. The target is to have the first eco-launcher ready by 2035 and then to allow for 15 years of deployment in order to have the huge capacity required to make the project feasible, said Dumestier...

Michael Winterson, managing director of the European Data Centre Association, acknowledges that a space data center would benefit from increased efficiency from solar power without the interruption of weather patterns — but the center would require significant amounts of rocket fuel to keep it in orbit. Winterson estimates that even a small 1 megawatt center in low earth orbit would need around 280,000 kilograms of rocket fuel per year at a cost of around $140 million in 2030 — a calculation based on a significant decrease in launch costs, which has yet to take place. "There will be specialist services that will be suited to this idea, but it will in no way be a market replacement," said Winterson. "Applications that might be well served would be very specific, such as military/surveillance, broadcasting, telecommunications and financial trading services. All other services would not competitively run from space," he added in emailed comments.

[Merima Dzanic, head of strategy and operations at the Danish Data Center Industry Association] also signaled some skepticism around security risks, noting, "Space is being increasingly politicised and weaponized amongst the different countries. So obviously, there is a security implications on what type of data you send out there."
Its not the only study looking at the potential of orbital data centers, notes CNBC. "Microsoft, which has previously trialed the use of a subsea data center that was positioned 117 feet deep on the seafloor, is collaborating with companies such as Loft Orbital to explore the challenges in executing AI and computing in space."

The article also points out that the total global electricity consumption from data centers could exceed 1,000 terawatt-hours in 2026. "That's roughly equivalent to the electricity consumption of Japan, according to the International Energy Agency."

Lego teamed up with the European Space Agency to make Lego pieces from actual meteorite dust, writes Engadget.

"It's a proof of concept to show how astronauts could use moondust to build lunar structures." Consider the sheer amount of energy and money required to haul up building materials from Earth to the Moon. It would be a game changer to, instead, build everything from pre-existing lunar materials. There's a layer of rock and mineral deposits at the surface of the Moon, which is called lunar regolith...

However, there isn't too much lunar regolith here on Earth for folks to experiment with. ESA scientists made their own regolith by grinding up a really old meteorite. [4.5 billion years, according to Lego's site, discovered in Africa in 2000.] The dust from this meteorite was turned into a mixture that was used to 3D print the Lego pieces. Voila. Moon bricks. They click together just like regular Lego bricks, though they only come in one color (space gray obviously.)
"The result is amazing," says ESA Science Officer Aidan Cowley on the Lego site (though "the bricks may look a little rougher than usual. Importantly the clutch power still works, enabling us to play and test our designs.")

"Nobody has built a structure on the Moon," Cowley said in an ESA statement. "So it was great to have the flexibility to try out all kinds of designs and building techniques with our space bricks." And the bricks will also be "helping to inspire the next generation of space engineers," according to the ESA's announcement — since they'll be on display in select Lego stores in the U.S., Canada, the U.K., Spain, France, Germany, the Netherlands, and Australia through September 20th.

"Stars very close to the center of our galaxy could be fueled by dark matter in perpetuity," writes Gizmodo, "according to a team of astronomers who recently studied the distant light sources." The group of stars, known as S-cluster stars, is just three light-years from the center of the Milky Way (for reference, we are about 26,000 light-years from the center of our galaxy, which hosts a supermassive black hole at its core). The stars are surprisingly young for their galactic neighborhood, yet they don't look like stars that simply migrated to this part of the Milky Way after forming in another location...

As reported by Space.com, the research team posits that these weird stars may be accreting dark matter, which they then use as fuel to keep burning. Since models estimate there is plenty of dark matter near the galaxy's core, the stars are "forever young," as study lead author Isabelle John, an astrophysicist at the Kavli Institute for Particle Astrophysics and Cosmology told Space.com. Effectively, the stars have a long, long way to go before they start running low on fuel. The team's paper is currently hosted on the preprint server arXiv, meaning it has not yet gone through the process of peer review.
Dark matter is only "seen" through its effects on other objects, the article points out — leading to lots of theories as to where it's actually located. "Earlier this year, a different team of researchers proposed that neutron stars — extremely dense stellar remnants — could actually be a source of dark matter. Last July, yet another team suggested that the Webb Telescope had detected stars that were powered by dark matter."

An anonymous reader quotes a report from Ars Technica: One of the most striking things about the explosion of renewable power that's happening in the U.S. is that much of it is going on in states governed by politicians who don't believe in the problem wind and solar are meant to address. Acceptance of the evidence for climate change tends to be lowest among Republicans, yet many of the states where renewable power has boomed -- wind in Wyoming and Iowa, solar in Texas -- are governed by Republicans. That's partly because, up until about 2020, there was a strong bipartisan consensus in favor of expanding wind and solar power, with support above 75 percent among both parties. Since then, however, support among Republicans has dropped dramatically, approaching 50 percent, according to polling data released this week. [...] One striking thing about the new polling data, gathered by the Pew Research Center, is how dramatically it skews with age. When given a choice between expanding fossil fuel production or expanding renewable power, Republicans under the age of 30 favored renewables by a 2-to-1 margin. Republicans over 30, in contrast, favored fossil fuels by margins that increased with age, topping out at a three-to-one margin in favor of fossil fuels among those in the 65-and-over age group. The decline in support occurred in those over 50 starting in 2020; support held steady among younger groups until 2024, when the 30-49 age group started moving in favor of fossil fuels.

Democrats, by contrast, break in favor of renewables by 75 points, with little difference across age groups and no indication of significant change over time. They're also twice as likely to think a solar farm will help the local economy than Republicans are. Similar differences were apparent when Pew asked about policies meant to encourage the sale of electric vehicles, with 83 percent of Republicans opposed to having half of cars sold be electric in 2032. By contrast, nearly two-thirds of Democrats favored this policy. There's also a rural/urban divide apparent (consistent with Republicans getting more support from rural voters). Forty percent of urban residents felt that a solar farm would improve the local economy; only 25 percent of rural residents agreed. Rural residents were also more likely to say solar farms made the landscape unattractive and take up too much space. (Suburban participants were consistently in between rural and urban participants.) What's behind these changes? The single biggest factor appears to be negative partisanship combined with the election of Joe Biden. Among Republicans, support for every single form of power started to change in 2020 -- fossil fuels, renewables, and nuclear. Among Democrats, that's largely untrue. Their high level of support for renewable power and aversion to fossil fuels remained largely unchanged. The lone exception is nuclear power, where support rose among both Democrats and Republicans (the Biden administration has adopted a number of pro-nuclear policies).

Nine astronauts aboard the International Space Station were forced to take shelter late Wednesday when a satellite broke up in low Earth orbit. This "debris-generating event" created "over 100 pieces of trackable [space junk]," according to U.S. space-tracking firm LeoLabs. Space.com reports: The Expedition 71 crew on the International Space Station (ISS) went to their three spacecraft, including Boeing Starliner, shortly after 9 p.m. EDT (0200 GMT), according to a brief NASA update on X, formerly known as Twitter. As the ISS follows a time zone identical to GMT, according to the European Space Agency, the astronauts were likely in their sleep period when the incident occurred. The procedure was a "precautionary measure", NASA officials added, stating that the crew only stayed in their spacecraft for about an hour before they were "cleared to exit their spacecraft, and the station resumed normal operations."

NASA did not specify which satellite was associated with the incident, but satellite monitoring and collision detection firm LeoLabs identified a "debris-generating event" that same evening. "Early indications are that a non-operational Russian spacecraft, Resurs-P1 [or] SATNO 39186, released a number of fragments," the company wrote on X. U.S. Space Command also reported the Resurs-P1 event, saying on X that over 100 pieces of trackable debris were generated. The military said it "observed no immediate threats and is continuing to conduct routine conjunction assessments." (A conjunction refers to a close approach of two objects in orbit to one another.)

Publicly traded crypto exchange Coinbase, in connection with History Associates Incorporated, has filed two civil lawsuits against the Securities and Exchange Commission and Federal Deposit Insurance Corporation for their failure to comply with FOIA requests. From a report: The Freedom of Information Act, or FOIA, grants the full or partial disclosure of previously unreleased information that's controlled by the U.S. government. Generally speaking, agencies have 20 days to respond -- not necessarily satisfy -- these requests. And even when government agencies do furnish documents, they can redact anything that falls under certain exemptions: Information related to national security, internal personnel, trade secrets, law enforcement, or financial institution records.

Late last year, Coinbase hired History Associates Incorporated, a private historical research firm, to submit a FOIA request on its behalf. The San Francisco crypto exchange was seeking copies of "Pause Letters" sent to financial institutions asking them to indefinitely cease all "crypto-related activities," according to the complaint. The letters were described in a report from the FDIC's Office of Inspector General (OIG), but never shared publicly. The OIG said the letters presented a "risk that the FDIC would inadvertently limit financial institution innovation and growth in the crypto space." The FDIC refused to provide History Associates or Coinbase with the letters.

Early analysis of the near-Earth asteroid Bennu has revealed unexpected evidence of magnesium-sodium phosphate, suggesting Bennu might have originated from a primitive ocean world. Space.com reports: On Earth, magnesium-sodium phosphate can be found in certain minerals and geological formations, as well as within living organisms where it is present in various biochemical processes and is a component of bone and teeth. According to a NASA press release, however, its presence on Bennu surprised the research team because it wasn't seen in the OSIRIS-REx probe's remote sensing data prior to sample collection. The team says its presence "hints that the asteroid could have splintered off from a long-gone, tiny, primitive ocean world." "The presence and state of phosphates, along with other elements and compounds on Bennu, suggest a watery past for the asteroid," said Lauretta. "Bennu potentially could have once been part of a wetter world. Although, this hypothesis requires further investigation."

The OSIRIS-REx spacecraft obtained a sample of Bennu's regolith on October 20, 2020 using its Touch-and-Go Sample Acquisition Mechanism (TAGSAM), which comprises a specialized sampler head situated on an articulated arm. Bennu is a small B-type asteroid, which are relatively uncommon carbonaceous asteroids. "[Bennu] was selected as the mission target in part because telescopic observations indicated a primitive, carbonaceous composition and water-bearing minerals," stated the team in their paper. [...] Further analysis on the samples revealed the prevailing component of the regolith sample is magnesium-bearing phyllosilicates, primarily serpentine and smectite -- types of rock typically found at mid-ocean ridges on Earth. A comparison of these serpentinites with their terrestrial counterparts provides possible insights into Bennu's geological past. "Offering clues about the aqueous environment in which they originated," wrote the team.

While Bennu's surface may have been altered by water over time, it still preserves some of the ancient characteristics scientists believe were present during the early solar system's days. Bennu's surface materials still contain some original features from the cloud of gas and dust from which our solar system's planets formed -- known as the protoplanetary disk. The team's study also confirmed the asteroid is rich in carbon, nitrogen and some organic compounds -- all of which, in addition to the magnesium phosphate, are essential components for life as we know it on Earth.

In a contract worth as much as $843 million, NASA announced today SpaceX has been selected to develop a vehicle that will de-orbit the International Space Station in 2030. "As the agency transitions to commercially owned space destinations closer to home, it is crucial to prepare for the safe and responsible deorbit of the International Space Station in a controlled manner after the end of its operational life in 2030," the U.S. space agency said in a statement. TechCrunch reports: Few details about the U.S. Deorbit Vehicle, as NASA calls the craft, have been released so far. However, NASA clarified that the vehicle will be different from SpaceX's Dragon capsule, which delivers cargo and crew to the station, and other vehicles that perform services for the agency. Unlike these vehicles, which are built and operated by SpaceX, NASA will take ownership of the U.S. Deorbit Vehicle post-development and operate it throughout its mission. Both the vehicle and the ISS will destructively break up as they reenter the atmosphere, and one of the big tasks ahead for SpaceX is to ensure that the station reenters in a way that endangers no populated areas. The launch contract for the U.S. Deorbit Vehicle will be announced separately.

NASA and its partners had been evaluating using a Russian Roscosmos Progress spacecraft to conduct the de-orbit mission, but studies indicated that a new spacecraft was needed for the de-orbit maneuver. The station's safe demise is a responsibility shared by the five space agencies that operate on the ISS -- NASA, the Canadian Space Agency, European Space Agency, Japan Aerospace Exploration Agency, and State Space Corporation Roscosmos -- but it is unclear whether this contract amount is being paid out by all countries.

In 2021, Apple announced plans for a new $1 billion campus in North Carolina, set to include a new engineering and research center and support up to 3,000 employees. According to Lauren Ohnesorge of Triangle Business Journal (paywalled), Apple remains committed to the project, but the timeline has been delayed by four years. MacRumors reports: A limited amount of progress on the campus has been made since the announcement, and Apple has not provided updates on construction until now. Apple told Triangle Business Journal that it has paused work on the campus, and it is working with North Carolina Governor Roy Cooper and the North Carolina Department of Commerce to extend the project's timeline by four years.

Apple last year filed development plans for the first phase of construction, but the specific timeline for the project has never been clear. Apple's plans for Research Triangle Park include six buildings and a parking garage totaling 700,000 square feet of office space, 190,000 square feet of accessory space, and close to 3,000 parking spaces spanning 41 acres. Apple owns 281 acres of land in the area where it plans to build its campus, so there could ultimately be several phases of construction. As it prepares to build the NC research center, Apple is leasing more than 200,000 square feet of office space in Cary, North Carolina. In a statement, Apple said it is still committed to the project: "Apple has been operating in North Carolina for over two decades. And we're deeply committed to growing our teams here. In the last three years, we've added more than 600 people to our team in Raleigh, and we're looking forward to developing our new campus in the coming years."

An anonymous reader shares a report: Since the James Webb Space Telescope began operating two years ago, astronomers have been using it to leapfrog one another millions of years into the past, back toward the moment they call cosmic dawn, when the first stars and galaxies were formed. Last month, an international team doing research as the JWST Advanced Deep Extragalactic Survey, or JADES, said it had identified the earliest, most distant galaxy yet found -- a banana-shaped blob of color measuring 1,600 light-years across. It was already shining with intense starlight when the universe was in its relative infancy, at only 290 million years old, the astronomers said.

The new galaxy, known as JADES-GS-z14-0, is one of a string of Webb discoveries, including early galaxies and black holes, that challenge conventional models of how the first stars and galaxies formed. "This discovery proves that luminous galaxies were already in place 300 million years after the Big Bang and are more common than what was expected," the researchers wrote in a paper posted to an online physics archive. "Galaxy formation models will need to address the existence of such large and luminous galaxies so early in cosmic history," said the authors, who were led by Stefano Carniani, a professor at the university Scuola Normale Superiore in Pisa, Italy.

The galaxy was first spotted during a deep space survey with the Webb's Near Infrared Camera, one of the telescope's workhorse instruments. Within a patch of southern sky known as the Jades Origin Field, which is about a quarter of the size of a full moon, scientists found 11 galaxies that seemed to date from when the universe was less than 400 million years old -- far more than they had expected. Subsequent studies by Dr. Carniani and his colleagues with the telescope's infrared spectrograph revealed that the wavelength of light from JADES-GS-z14-0 had been stretched more than 15-fold by the expansion of the universe (a redshift of 14 to use astronomical jargon), similar to the way a siren's pitch becomes lower as it speeds away. That means light has been coming toward us for 13.5 billion years, since shortly after the universe began. (The universe is about 13.8 billion years old, according to cosmological calculations.) The light from the galaxy is spread over a diffuse region, which indicates that the glow was coming from stars, not the gullet of a black hole. Its brightness corresponded to the output of hundreds of millions of suns, an astonishing number to have formed and assembled in only 290 million years.

China brought a capsule full of lunar soil [non-paywalled link] from the far side of the moon down to Earth on Tuesday, achieving the latest success in an ambitious schedule to explore the moon and other parts of the solar system. From a report: The sample, retrieved by the China National Space Administration's Chang'e-6 lander after a 53-day mission, highlights China's growing capabilities in space and notches another win in a series of lunar missions that started in 2007 and have so far been executed almost without flaw. "Chang'e-6 is the first mission in human history to return samples from the far side of the moon," Long Xiao, a planetary geologist at China University of Geosciences, wrote in an email. "This is a major event for scientists worldwide," he added, and "a cause for celebration for all humanity."

Such sentiments and the prospects of international lunar sample exchanges highlighted the hope that China's robotic missions to the moon and Mars will serve to advance scientific understanding of the solar system. Those possibilities are contrasted by views in Washington and elsewhere that Tuesday's achievement is the latest milestone in a 21st-century space race with geopolitical overtones. In February, a privately operated American spacecraft landed on the moon. NASA is also pursuing the Artemis campaign to return Americans to the lunar surface, although its next mission, a flight by astronauts around the moon, has been delayed because of technical issues. China, too, is looking to expand its presence on the moon, landing more robots there, and eventually human astronauts, in the years to come.

Passant Rabie reports via Gizmodo: A video circulating online appears to show debris from a Chinese rocket falling above a populated area, with residents running for cover as a heavy cloud of dark yellow smoke trails across the sky in a frightening scene. The suspected debris may have come from China's Long March 2C rocket, which launched on Saturday, June 22, carrying a joint mission by China and France to study Gamma-ray bursts. The launch was declared a success, but its aftermath was captured by videos posted to Chinese social media sites.

The videos show what appears to be the first stage rocket booster of the Long March 2C rocket tumbling uncontrollably over a village in southwest China, while local residents cover their ears and run for shelter from the falling debris. There are no reports of injuries or damage to property. That said, unverified video and images show a gigantic cloud erupting at the site of the crashed rocket, and the booster itself seemingly next to a roadway. The first stage of the rocket can be seen leaking fuel, the color of which is consistent with nitrogen tetroxide. The chemical compound is a strong oxidizing agent that is used for rocket propulsion but it can be fatally toxic, according to Jonathan McDowell, astrophysicist at the Harvard-Smithsonian Center.

"It's known in the rocket industry as BFRC, a big fucking red cloud," McDowell told Gizmodo. "And when you see a BFRC, you run for your life." Nitrogen tetroxide was accepted as the rocket propellant oxidizer of choice in the early 1950s by the U.S.S.R. and the United States, however it became less commonly used over the years because it is extremely toxic, according to NASA (PDF). If it comes in contact with skin, eyes, or respiratory system, it can destroy human tissue, and if inhaled through the lungs, it can lead to a build up of fluids or, in extreme cases, death. "It's pretty scary, but this is just how the Chinese do business," McDowell told Gizmodo. "They have a different level of acceptable public risk." "I think over a 10 year period, we may see the older rockets phased out but they're not in any hurry to do so," added McDowell. "They're still launching one a week or something like that, and they are really quite dangerous."

Tuesday a SpaceX Falcon Heavy rocket will launch a special satellite — a state-of-the-art weather-watcher from America's National Oceanic and Atmospheric Administration.

It will complete a series of four GOES-R satellite launches that began in 2016. Space.com drills down into how these satellites have changed weather forecasts: More than seven years later, with three of the four satellites in the series orbiting the Earth, scientists and researchers say they are pleased with the results and how the advanced technology has been a game changer. "I think it has really lived up to its hype in thunderstorm forecasting. Meteorologists can see the convection evolve in near real-time and this gives them enhanced insight on storm development and severity, making for better warnings," John Cintineo, a researcher from NOAA's National Severe Storms Laboratory , told Space.com in an email.

"Not only does the GOES-R series provide observations where radar coverage is lacking, but it often provides a robust signal before radar, such as when a storm is strengthening or weakening. I'm sure there have been many other improvements in forecasts and environmental monitoring over the last decade, but this is where I have most clearly seen improvement," Cintineo said. In addition to helping predict severe thunderstorms, each satellite has collected images and data on heavy rain events that could trigger flooding, detected low clouds and fog as it forms, and has made significant improvements to forecasts and services used during hurricane season. "GOES provides our hurricane forecasters with faster, more accurate and detailed data that is critical for estimating a storm's intensity, including cloud top cooling, convective structures, specific features of a hurricane's eye, upper-level wind speeds, and lightning activity," Ken Graham, director of NOAA's National Weather Service told Space.com in an email.

Instruments such as the Advanced Baseline Imager have three times more spectral channels, four times the image quality, and five times the imaging speed as the previous GOES satellites. The Geostationary Lightning Mapper is the first of its kind in orbit on the GOES-R series that allows scientists to view lightning 24/7 and strikes that make contact with the ground and from cloud to cloud. "GOES-U and the GOES-R series of satellites provides scientists and forecasters weather surveillance of the entire western hemisphere, at unprecedented spatial and temporal scales," Cintineo said. "Data from these satellites are helping researchers develop new tools and methods to address problems such as lightning prediction, sea-spray identification (sea-spray is dangerous for mariners), severe weather warnings, and accurate cloud motion estimation. The instruments from GOES-R also help improve forecasts from global and regional numerical weather models, through improved data assimilation."
The final satellite, launching Tuesday, includes a new sensor — the Compact Coronagraph — "that will monitor weather outside of Earth's atmosphere, keeping an eye on what space weather events are happening that could impact our planet," according to the article.

"It will be the first near real time operational coronagraph that we have access to," Rob Steenburgh, a space scientist at NOAA's Space Weather Prediction Center, told Space.com on the phone. "That's a huge leap for us because up until now, we've always depended on a research coronagraph instrument on a spacecraft that was launched quite a long time ago."

"A Chinese launch of the joint Sino-French SVOM mission to study Gamma-ray bursts early Saturday saw toxic rocket debris fall over a populated area..." writes Space News: SVOM is a collaboration between the China National Space Administration (CNSA) and France's Centre national d'études spatiales (CNES). The mission will look for high-energy electromagnetic radiation from these events in the X-ray and gamma-ray ranges using two French and two Chinese-developed science payloads... Studying gamma-ray bursts, thought to be caused by the death of massive stars or collisions between stars, could provide answers to key questions in astrophysics. This includes the death of stars and the creation of black holes.

However the launch of SVOM also created an explosion of its own closer to home.A video posted on Chinese social media site Sina Weibo appears to show a rocket booster falling on a populated area with people running for cover. The booster fell to Earth near Guiding County, Qiandongnan Prefecture in Guizhou province, according to another post...

A number of comments on the video noted the danger posed by the hypergolic propellant from the Long March rocket... The Long March 2C uses a toxic, hypergolic mix of nitrogen tetroxide and unsymmetrical dimethylhydrazine (UDMH). Reddish-brown gas or smoke from the booster could be indicative of nitrogen tetroxide, while a yellowish gas could be caused by hydrazine fuel mixing with air. Contact with either remaining fuel or oxidizer from the rocket stage could be very harmful to individuals.
"Falling rocket debris is a common issue with China's launches from its three inland launch sites..." the article points out.

"Authorities are understood to issue warnings and evacuation notices for areas calculated to be at risk from launch debris, reducing the risk of injuries.

Where is dark matter, the invisible masses which must exist to bind galaxies together? Stephen Hawking postulated they could be hiding in "primordial" black holes formed during the big bang, writes CNN.

"Now, a new study by researchers with the Massachusetts Institute of Technology has brought the theory back into the spotlight, revealing what these primordial black holes were made of and potentially discovering an entirely new type of exotic black hole in the process." Other recent studies have confirmed the validity of Hawking's hypothesis, but the work of [MIT graduate student Elba] Alonso-Monsalve and [study co-author David] Kaiser, a professor of physics and the Germeshausen Professor of the History of Science at MIT, goes one step further and looks into exactly what happened when primordial black holes first formed. The study, published June 6 in the journal Physical Review Letters, reveals that these black holes must have appeared in the first quintillionth of a second of the big bang: "That is really early, and a lot earlier than the moment when protons and neutrons, the particles everything is made of, were formed," Alonso-Monsalve said... "You cannot find quarks and gluons alone and free in the universe now, because it is too cold," Alonso-Monsalve added. "But early in the big bang, when it was very hot, they could be found alone and free. So the primordial black holes formed by absorbing free quarks and gluons."

Such a formation would make them fundamentally different from the astrophysical black holes that scientists normally observe in the universe, which are the result of collapsing stars. Also, a primordial black hole would be much smaller — only the mass of an asteroid, on average, condensed into the volume of a single atom. But if a sufficient number of these primordial black holes did not evaporate in the early big bang and survived to this day, they could account for all or most dark matter.

During the making of the primordial black holes, another type of previously unseen black hole must have formed as a kind of byproduct, according to the study. These would have been even smaller — just the mass of a rhino, condensed into less than the volume of a single proton... "It's inevitable that these even smaller black holes would have also formed, as a byproduct (of primordial black holes' formation)," Alonso-Monsalve said, "but they would not be around today anymore, as they would have evaporated already." However, if they were still around just ten millionths of a second into the big bang, when protons and neutrons formed, they could have left observable signatures by altering the balance between the two particle types.
Professer Kaiser told CNN the next generation of gravitational detectors "could catch a glimpse of the small-mass black holes — an exotic state of matter that was an unexpected byproduct of the more mundane black holes that could explain dark matter today."

Nico Cappelluti, an assistant professor in the physics department of the University of Miami (who was not involved with the study) confirmed to CNN that "This work is an interesting, viable option for explaining the elusive dark matter."

Jonathan O'Callaghan reports via Scientific American: Despite more than a century of efforts to show otherwise, it seems Albert Einstein can still do no wrong. Or at least that's the case for his special theory of relativity, which predicts that time ticks slower for objects moving at extremely high speeds. Called time dilation, this effect grows in intensity the closer to the speed of light that something travels, but it is strangely subjective: a passenger on an accelerating starship would experience time passing normally, but external observers would see the starship moving ever slower as its speed approached that of light. As counterintuitive as this effect may be, it has been checked and confirmed in the motions of everything from Earth-orbiting satellites far-distant galaxies. Now a group of scientists have taken such tests one step further by observing more than 1,500 supernovae across the universe to reveal time dilation's effects on a staggering cosmic scale. The researchers' findings, once again, reach an all-too-familiar conclusion. "Einstein is right one more time," says Geraint Lewis of the University of Sydney, a co-author of the study.

In the paper, posted earlier this month on the preprint server arXiv.org, Ryan White of the University of Queensland in Australia and his colleagues used data from the Dark Energy Survey (DES) to investigate time dilation. For the past decade, researchers involved with DES had used the Victor M. Blanco Telescope at the Cerro Tololo Inter-American Observatory in Chile to study particular exploding stars called Type 1a supernovae across billions of years of cosmic history. [...] Type 1a supernovae are keystone cosmic explosions caused when a white dwarf -- the slowly cooling corpse of a midsized star -- siphons so much material from a companion that it ignites a thermonuclear reaction and explodes. This explosion occurs once the growing white dwarf reaches about 1.44 times the mass of our sun, a threshold known as the Chandrasekhar limit. This physical baseline imbues all Type 1a supernovae with a fairly consistent brightness, making them useful cosmic beacons for gauging intergalactic distances. "They should all be essentially the same kind of event no matter where you look in the universe," White says. "They all come from exploding white dwarf stars, which happens at almost exactly the same mass no matter where they are."

The steadfastness of these supernovae across the entire observable universe is what makes them potent probes of time dilation -- nothing else, in principle, should so radically and precisely slow their apparent progression in lockstep with ever-greater distances. Using the dataset of 1,504 supernovae from DES, White's paper shows with astonishing accuracy that this correlation holds true out to a redshift of 1.2, a time when the universe was about five billion years old. "This is the most precise measurement" of cosmological time dilation yet, White says, up to seven times more precise than previous measurements of cosmological time dilation that used fewer supernovae. [...] This particular supernova-focused facet of the Dark Energy Survey has concluded, so until a new dataset is taken, White's measurement of cosmological time dilation is unlikely to be beaten. "It's a pretty definitive measurement," says [Tamara Davis of the University of Queensland, a co-author of the paper]. "You don't really need to do any better." Jonathan O'Callaghan is an award-winning freelance journalist covering astronomy, astrophysics, commercial spaceflight and space exploration.

A Florida homeowner has filed an unprecedented claim against NASA for damages caused by space debris that crashed through his roof in March. Alejandro Otero is seeking over $80,000 for property damage and other costs after a 1.6-pound metal object from the International Space Station struck his Naples home. NASA confirmed the debris was part of a battery pack jettisoned in 2021. Legal experts, cited by ArsTechnica in the linked story, say the agency's response could set a precedent for future cases involving space debris damage.