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NASA

NASA Confirms That Debris From ISS Crashed Into Florida Home (nbcnews.com) 57

NASA has confirmed that a piece of metal that tore through a Florida home last month was space junk from the International Space Station. NBC News reports: The agency confirmed Monday that the 1.6-pound object was debris from a cargo pallet that had been intentionally released from the space station three years ago. The pallet, packed with aging batteries, was supposed to burn up harmlessly in Earth's atmosphere, but a piece survived -- the piece that smashed into a house in Naples, Florida, on March 8.

WINK News, a CBS News affiliate in southwestern Florida, first reported the incident. Naples resident Alejandro Otero told the outlet that the object crashed through the roof and two floors of his home. Otero was not home at the time, he told WINK News, but the metal object nearly hit his son, who was two rooms away. In a blog post about the incident, NASA said it had analyzed the object at the Kennedy Space Center in Florida and confirmed that it was part of the equipment used to mount the batteries on the cargo pallet.

The piece of space junk is roughly cylindrical in shape and is about 4-inches tall and 1.6-inches wide. NASA said agency staff studied the object's features and metal composition and matched it to the hardware that had been jettisoned from the space station in 2021. At that time, new lithium-ion batteries had recently been installed at the space station, so the old nickel hydrogen batteries were packed up for disposal. The space station's robotic arm released the 5,800-pound cargo pallet containing the batteries over the Pacific Ocean, as the outpost orbited 260 miles above the Earth's surface, according to NASA. NASA said it will perform a detailed investigation of the latest debris incident to determine how the object withstood the extreme trip through the atmosphere.

Businesses

Sierra Space, Valued At $5.3 Billion, Eyes IPO To 'Accelerate the New Space Economy' (yahoo.com) 26

Sierra Space CEO Tom Vice told Yahoo Finance it plans to go public within the next 18 months at a valuation of $5.3 billion. Since being spun out of defense contractor Sierra Nevada Corporation in 2021, the company has "placed its bets on building out the growing space economy, from developing rocket propulsion technology to a commercial space station with Blue Origin." From the report: Its ambitions have fueled the development of its cargo space plane, the Dream Chaser, set to have its inaugural mission to the International Space Station (ISS) in the second half of this year. Built to land on any commercial runway, the plane will lower the barrier to entry into low-earth orbit and open up business opportunities, Vice said. "Since the 1960s, every science experiment or human being that's come back to earth from space, even today, is still landing in a capsule in the ocean," he said. "We think changing and revolutionizing the way that we bring things back from space, both humans and cargo, and landing [the spacecraft] back at a commercial runway will completely accelerate the new space economy."

"We believe that the next big breakthrough products in oncology, longevity, and industrialized components like glass will be produced in low Earth orbit," Vice said, noting that many of those opportunities are likely to come from the development of commercial space stations to replace the decades-old ISS. Sierra Space has partnered with Blue Origin to build out the Orbital Reef, a commercially owned and operated space station, though recent reports have hinted at tension between the corporate partners. "We're transitioning from decades of government-run space stations with just a handful of government-trained astronauts to the full commercialization of low Earth orbit," Vice said. "We think that's going to create, we believe, probably the most profound industrial revolution and grow that space economy well over a trillion dollars by 2040."

ISS

Trash From the ISS May Have Hit a House In Florida (arstechnica.com) 135

A nearly two-pound piece of trash from the International Space Station may have hit a house in Florida. Alejandro Otero said it "tore through the roof and both floors of his two-story house in Naples, Florida," reports Ars Technica. "Otero wasn't home at the time, but his son was there." From the report: A Nest home security camera captured the sound of the crash at 2:34 pm local time (19:34 UTC) on March 8. That's an important piece of information because it is a close match for the time -- 2:29 pm EST (19:29 UTC) -- that US Space Command recorded the reentry of a piece of space debris from the space station. At that time, the object was on a path over the Gulf of Mexico, heading toward southwest Florida. This space junk consisted of depleted batteries from the ISS, attached to a cargo pallet that was originally supposed to come back to Earth in a controlled manner. But a series of delays meant this cargo pallet missed its ride back to Earth, so NASA jettisoned the batteries from the space station in 2021 to head for an unguided reentry.

Otero's likely encounter with space debris was first reported by WINK News, the CBS affiliate for southwest Florida. Since then, NASA has recovered the debris from the homeowner, according to Josh Finch, an agency spokesperson. Engineers at NASA's Kennedy Space Center will analyze the object "as soon as possible to determine its origin," Finch told Ars. "More information will be available once the analysis is complete." [...] In a post on X, Otero said he is waiting for communication from "the responsible agencies" to resolve the cost of damages to his home.

If the object is owned by NASA, Otero or his insurance company could make a claim against the federal government under the Federal Tort Claims Act, according to Michelle Hanlon, executive director of the Center for Air and Space Law at the University of Mississippi. "It gets more interesting if this material is discovered to be not originally from the United States," she told Ars. "If it is a human-made space object which was launched into space by another country, which caused damage on Earth, that country would be absolutely liable to the homeowner for the damage caused." This could be an issue in this case. The batteries were owned by NASA, but they were attached to a pallet structure launched by Japan's space agency.

ISS

5,800 Pounds of Batteries Tossed Off the ISS in 2021 Fell to Earth Today (space.com) 36

Space.com describes it as "a nearly 3-ton leftover tossed overboard from the International Space Station" — which crashed back to earth today. One satellite tracker claims to have filmed it passing over the Netherlands...

"A couple minutes later reentry and it would have reached Fort Meyers" in Florida, posted astronomer Jonathan McDowell of the Harvard-Smithsonian Center for Astrophysics. But instead it re-entered the earth's atmosphere "over the Gulf of Mexico between Cancun and Cuba," Friday afternoon. "This was within the previous prediction window but a little to the northeast of the 'most likely' part of the path."

From Space.com: The multi-ton Exposed Pallet 9 (EP9) was jettisoned from the space station back in March 2021. At the time, it was reported to be the most massive object ever tossed overboard from the International Space Station. Disposing of used or unnecessary equipment in such a way is common practice aboard the space station, as the objects typically burn up harmlessly in Earth's atmosphere.

Ahead of EP9's reentry, the Federal Office for Civil Protection and Disaster Relief, National Warning Center 1 in Bonn, Germany issued this information... "The object is battery packs from the International Space Station. Luminous phenomena or the perception of a sonic boom are possible...." EP9 is loaded with old Nickel-Hydrogen batteries, NASA explained at the time it was jettisoned, also explaining that EP9 has the approximate mass of a large SUV and predicting it would re-enter Earth's atmosphere in two-to-four years.

"A large space object reenters the atmosphere in a natural way approximately once per week," the European Space Agency points out, "with the majority of the associated fragments burning up before reaching the ground.

"Most spacecraft, launch vehicles and operational hardware are designed to limit the risks associated with a reentry."
ISS

Russia Acknowledges Continuing Air Leak From Its Segment of Space Station (theguardian.com) 55

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.

Space

To Combat Space Pollution, Japan Plans Launch of World's First Wooden Satellite (theguardian.com) 59

Japanese scientists plan to launch a satellite made of magnolia wood this summer on a U.S. rocket, reports the Observer.

Experiments carried out on the International Space Station showed magnolia wood was unusually stable and resistant to cracking — and "when it burns up as it re-enters the atmosphere after completing its mission, will produce only a fine spray of Âbiodegradable ash." The LignoSat probe has been built by researchers at Kyoto University and the logging company Sumitomo Forestry in order to test the idea of using biodegradable materials such as wood to see if they can act as environmentally friendly alternatives to the metals from which all satellites are currently constructed. "All the satellites which re-enter the Earth's atmosphere burn and create tiny alumina particles, which will float in the upper atmosphere for many years," Takao Doi a Japanese astronaut and aerospace engineer with Kyoto University, warned recently. "Eventually, it will affect the environment of the Earth."

To tackle the problem, Kyoto researchers set up a project to evaluate types of wood to determine how well they could withstand the rigours of space launch and lengthy flights in orbit round the Earth. The first tests were carried out in laboratories that recreated conditions in space, and wood samples were found to have suffered no measurable changes in mass or signs of decomposition or damage. "Wood's ability to withstand these conditions astounded us," said Koji Murata, head of the project.

After these tests, samples were sent to the ISS, where they were subjected to exposure trials for almost a year before being brought back to Earth. Again they showed little signs of damage, a phenomenon that Murata attributed to the fact that there is no oxygen in space which could cause wood to burn, and no living creatures to cause it to rot.

The article adds that if it performs well in space, "then the door could be opened for the use of wood as a construction material for more satellites."
ISS

Russian Cosmonaut Sets Record For Most Time In Space (reuters.com) 41

Russian cosmonaut Oleg Kononenko set a world record for total time spent in space, "surpassing his compatriot Gennady Padalka who logged more than 878 days in orbit," reports Reuters. From the report: At 0830 GMT Kononenko broke the record, Roscosmos said. Kononenko is expected to reach a total of 1,000 days in space on June 5 and by late September he will have clocked 1,110 days. "I fly into space to do my favourite thing, not to set records," Kononenko told TASS in an interview from the International Space Station (ISS) where he is orbiting about 263 miles (423 km) from the earth. "I am proud of all my achievements, but I am more proud that the record for the total duration of human stay in space is still held by a Russian cosmonaut." The 59-year-old took the top spot from Padalka, who accumulated a total of 878 days, 11 hours, 29 minutes and 48 seconds, Roscosmos said.

Kononenko said that he worked out regularly to counter the physical effects of "insidious" weightlessness, but that it was on returning to earth that the realisation came of how much life he had missed out on. "I do not feel deprived or isolated," he said. "It is only upon returning home that the realisation comes that for hundreds of days in my absence the children have been growing up without a papa. No one will return this time to me." He said cosmonauts could now use video calls and messaging to keep in touch with relatives but getting ready for each new space flight became more difficult due to technological advances.

"The profession of a cosmonaut is becoming more complicated. The systems and experiments are becoming more complicated. I repeat, the preparation has not become easier," he said. Kononenko dreamed of going to space as a child and enrolled in an engineering institute, before undergoing cosmonaut training. His first space flight was in 2008. His current trip to the ISS launched last year on a Soyuz MS-24.

ISS

SpaceX's Starship To Launch 'Starlab' Private Space Station In Late 2020s (space.com) 33

SpaceX's Starship rocket has been selected by Starlab to launch its private space station into orbit. "SpaceX's history of success and reliability led our team to select Starship to orbit Starlab," Dylan Taylor, chairman and CEO of Voyager Space, said in a statement. "SpaceX is the unmatched leader for high-cadence launches, and we are proud Starlab will be launched to orbit in a single flight by Starship." Space.com reports: Today's announcement didn't give a target launch date. But NASA and Starlab's developers want the four-person commercial station to be up and running before 2030, when the International Space Station (ISS) is expected to cease operations (though that retirement date is apparently not set in stone). [...] The 400-foot-tall (122 meters) Starship is the biggest and most powerful rocket ever built, capable of hauling up to 150 tons to low Earth orbit. It will send the fully outfitted Starlab up in just one launch, as Taylor noted above.

"Starlab's single-launch solution continues to demonstrate not only what is possible, but how the future of commercial space is happening now," Tom Ochinero, senior vice president of commercial business at SpaceX, said in the same statement. "The SpaceX team is excited for Starship to launch Starlab to support humanity's continued presence in low Earth orbit on our way to making life multiplanetary," Ochinero added.

ISS

SpaceX's 'Dragon' Capsule Carries Four Private Astronauts to the ISS for Axiom Space (arstechnica.com) 35

"It's the third all-private astronaut mission to the International Space Station," writes NASA — and they're expected to start boarding within the next hour!

Watch it all on the official stream of NASA TV.

More details from Ars Technica: The four-man team lifted off from NASA's Kennedy Space Center in Florida aboard a SpaceX Falcon 9 rocket Thursday, kicking off a 36-hour pursuit of the orbiting research laboratory. Docking is scheduled for Saturday morning. This two-week mission is managed by Houston-based Axiom Space, which is conducting private astronaut missions to the ISS as a stepping stone toward building a fully commercial space station in low-Earth orbit by the end of this decade.

Axiom's third mission, called Ax-3, launched at 4:49 pm EST (21:49 UTC) Thursday. The four astronauts were strapped into their seats inside SpaceX's Dragon Freedom spacecraft atop the Falcon 9 rocket. This is the 12th time SpaceX has launched a human spaceflight mission, and could be the first of five Dragon crew missions this year.

NASA reports that the crew "will spend about two weeks conducting microgravity research, educational outreach, and commercial activities aboard the space station." NASA Administrator Bill Nelson said "During their time aboard the International Space Station, the Ax-3 astronauts will carry out more than 30 scientific experiments that will help advance research in low-Earth orbit. As the first all-European commercial astronaut mission to the space station, the Ax-3 crew is proof that the possibility of space unites us all...."

The Dragon spacecraft will dock autonomously to the forward port of the station's Harmony module as early as 4:19 a.m. [EST] Saturday. Hatches between Dragon and the station are expected to open after 6 a.m. [EST], allowing the Axiom crew to enter the complex for a welcoming ceremony and start their stay aboard the orbiting laboratory.... The Ax-3 astronauts are expected to depart the space station Saturday, February 3, pending weather, for a return to Earth and splashdown at a landing site off the coast of Florida.

ISS

Mystery of the Missing ISS Tomato Finally Solved (gizmodo.com) 52

"A tomato lost for eight months on the orbiting lab has been located, " reports Gizmodo, "absolving astronaut Frank Rubio of playful allegations that he ate it." NASA's Veg-05 experiment, a project focusing on growing fruits and vegetables in space, experienced an unusual turn of events when a Red Robin dwarf tomato vanished shortly after being harvested in March. This tomato, part of a study to explore the feasibility of continuous fresh-food production in space, was finally found, NASA astronaut Jasmin Moghbeli revealed during a livestream on December 6...

The Veg-05 project expanded the scope of in-space farming to include dwarf tomatoes, exploring how lighting and fertilizer variations influence fruit growth, safety, and nutritional value (and yes, tomatoes are fruits, not vegetables)... Following the harvest in March, each astronaut received a tomato sample stored in a Ziploc bag. However, concerns about potential fungal contamination led NASA to instruct the astronauts not to consume the fruit, as Space.com reported.

News of the missing tomato first emerged on September 13, during an event commemorating Rubio's one-year stay in orbit. Rubio, who had an extended mission on the ISS due to a malfunctioning Russian Soyuz spacecraft, lamented the loss of his tomato share, which had floated away before he could take a bite. Rubio, who spent a record 371 days in space, mused about the missing tomato, saying: "I spent so many hours looking for that thing. I'm sure the desiccated tomato will show up at some point and vindicate me, years in the future."

In the livestream Moghbeli "did not specify where on the 356-foot space station the one-inch-wide red dwarf tomato was located," notes the Guardian, "or in what condition." The Rubio tomato turned out to be one of only 12 red dwarves successfully germinated and grown to ripeness in space during the Veg-05 project, compared with more than 100 in a parallel experiment conducted on Earth, according to NASA.
Thanks to Slashdot reader christoban for sharing the news.
ISS

Lost NASA Tool Bag Can Be Seen With Binoculars (nbcnews.com) 74

A tool bag that astronauts accidentally let float away during a routine spacewalk at the International Space Station is now orbiting Earth and can be seen with a pair of binoculars. NBC News reports: The bag drifted away from the space station this month when NASA astronauts Jasmin Moghbeli and Loral O'Hara were performing maintenance on the exterior of the orbiting outpost. "During the activity, one tool bag was inadvertently lost," NASA officials wrote Nov. 1 in a blog post detailing the outcome of the spacewalk. "Flight controllers spotted the tool bag using external station cameras. The tools were not needed for the remainder of the spacewalk."

The bag is now circling the planet in low-Earth orbit, but NASA said there's little danger of the tools hitting the International Space Station. "Mission Control analyzed the bag's trajectory and determined that risk of recontacting the station is low and that the onboard crew and space station are safe with no action required," the agency said in the blog post. For now then, the lost tool bag has become a new artificial "star" in the night sky.
The tool bag is orbiting about a minute ahead of the space station and may be bright enough to see with a pair of binoculars. "Skywatchers who want to try to spot the tool bag in orbit should head out on a clear night and first determine when the International Space Station is passing overhead," reports NBC News. "The tool bag will likely remain visible in the night sky for a few months, before its orbit slowly degrades and it eventually falls toward Earth."

You can track the ISS via NASA's Spot the Station website.
ISS

NASA Open To Extending ISS Beyond 2030 (spacenews.com) 21

Jeff Foust reports via SpaceNews: A NASA official opened the door to keeping the International Space Station in operation beyond 2030 if commercial space stations are not yet ready to take over by the end of the decade. Speaking at the Beyond Earth Symposium here Nov. 2, Ken Bowersox, NASA associate administrator for space operations, said it was "not mandatory" to retire the ISS as currently planned at the end of the decade depending on the progress companies are making on commercial stations. "The timeline is flexible," he said of that transition from the ISS to commercial stations. "It's not mandatory that we stop flying the ISS in 2030. But, it is our full intention to switch to new platforms when they're available." [...]

Bowersox acknowledged that schedule depends on the readiness of those commercial stations. "When it happens is going to depend a lot the maturity of the market," he said, which includes both the status of commercial stations and non-NASA customers for them. He made it clear that NASA does not expect to be the only customer for commercial stations. NASA's current requirements for those stations anticipate having two astronauts at a time on them, less than the ISS. "We looked at what we thought would be reasonable and what would actually give us a cost savings," he said of that requirement. "My biggest concern is if we get too far ahead of where the market and NASA has to carry the full cost of the platforms for longer, and we transition too quickly," he said. That could force NASA to move money from current ISS utilization to support those stations. "If we have a badly managed transition, we could find ourselves getting weak in those areas."

ISS

Bids For ISS Demolition Rights Are Now Open, NASA Declares 102

Jude Karabus writes via The Register: NASA has confirmed it will ask American companies to duke it out for the opportunity to deorbit the International Space Station -- quietly releasing a request for proposals last week. The specs, which appeared on U.S. government e-procurement portal SAM.gov, are for a vehicle the agency has dubbed the U.S. Deorbit Vehicle (USDV), which will be focused on the space station's final deorbit activity. According to NASA, it will be a "new spacecraft design or modification to an existing spacecraft" that must function on its first flight (yep, important that), as well as have "sufficient redundancy and anomaly recovery capability to continue the critical deorbit burn."

NASA is getting in well ahead of the 2030 deadline, by which time the agency is hoping to have "seamlessly transitioned" to commercially owned and operated platforms in low Earth orbit (LEO). The vehicle will take years to develop, test, and certify. The request for proposals (RFP) is a confirmation that the agency is going to go with the second option it floated in March, saying a private contractor would cut costs down from a predicted $1 billion.
NASA

NASA To Demonstrate Laser Communications From Space Station (nasa.gov) 40

SonicSpike shares a report from NASA: In 2023, NASA is sending a technology demonstration known as the Integrated LCRD Low Earth Orbit User Modem and Amplifier Terminal (ILLUMA-T) to the space station. Together, ILLUMA-T and the Laser Communications Relay Demonstration (LCRD), which launched in December 2021, will complete NASA's first two-way, end-to-end laser relay system. With ILLUMA-T, NASA's Space Communications and Navigation (SCaN) program office will demonstrate the power of laser communications from the space station. Using invisible infrared light, laser communications systems send and receive information at higher data rates. With higher data rates, missions can send more images and videos back to Earth in a single transmission. Once installed on the space station, ILLUMA-T will showcase the benefits higher data rates could have for missions in low Earth orbit.

"Laser communications offer missions more flexibility and an expedited way to get data back from space," said Badri Younes, former deputy associate administrator for NASA's SCaN program. "We are integrating this technology on demonstrations near Earth, at the Moon, and in deep space." In addition to higher data rates, laser systems are lighter and use less power -- a key benefit when designing spacecraft. ILLUMA-T is approximately the size of a standard refrigerator and will be secured to an external module on the space station to conduct its demonstration with LCRD. Currently, LCRD is showcasing the benefits of a laser relay in geosynchronous orbit -- 22,000 miles from Earth -- by beaming data between two ground stations and conducting experiments to further refine NASA's laser capabilities. "Once ILLUMA-T is on the space station, the terminal will send high-resolution data, including pictures and videos to LCRD at a rate of 1.2 gigabits-per-second," said Matt Magsamen, deputy project manager for ILLUMA-T. "Then, the data will be sent from LCRD to ground stations in Hawaii and California. This demonstration will show how laser communications can benefit missions in low Earth orbit."

ILLUMA-T is launching as a payload on SpaceX's 29th Commercial Resupply Services mission for NASA. In the first two weeks after its launch, ILLUMA-T will be removed from the Dragon spacecraft's trunk for installation on the station's Japanese Experiment Module-Exposed Facility (JEM-EF), also known as "Kibo" -- meaning "hope" in Japanese. NASA's Laser Communications Roadmap. Following the payload's installation, the ILLUMA-T team will perform preliminary testing and in-orbit checkouts. Once completed, the team will make a pass for the payload's first light -- a critical milestone where the mission transmits its first beam of laser light through its optical telescope to LCRD. Once first light is achieved, data transmission and laser communications experiments will begin and continue throughout the duration of the planned mission.

ISS

Watch SpaceX Deliver Four Astronauts to the International Space Station (space.com) 41

For SpaceX's 11th crewed mission — its eighth flight for NASA — "A SpaceX Dragon spacecraft carrying four astronauts will arrive at the International Space Station early Sunday," reports Space.com, "and you can watch it all live online in a free livestream." The Crew Dragon capsule Endurance is scheduled to reach the International Space Station at 8:39 a.m. EDT (1239 GMT), where it will dock itself to a space-facing port on the outpost's U.S.-built Harmony module.

The docking will mark the end of a nearly 30-hour journey for the capsule's four-person crew, which launched in the wee hours of Saturday from NASA's Pad 39A at the Kennedy Space Center in Florida... "SpaceX, thanks for the ride, it was awesome," Crew-7 commander Jasmin Moghbeli of NASA said after the crew reached orbit. "Go Crew-7, awesome ride." SpaceX's Crew-7 mission for NASA is ferrying Moghbeli to the ISS with a truly international crew: pilot Andreas Mogensen of the European Space Agency; and mission specialists Konstantin Borisov of Russia's Roscosmos agency and Satoshi Furukawa of the Japan Aerospace Exploration Agency. The quartet is the first all-international crew, with members from four different agencies and countries, to fly on the same Dragon capsule...

The Crew-7 astronauts are beginning a six-month expedition to the space station and will relieve the four astronauts of NASA's Crew-6 mission, who are due to return shortly after Moghbeli and her crew arrive.

SpaceX has created a "follow Dragon" web page with graphics tracking the capsule's progress to the Space Station...
Earth

Tropical Rainforests Could Get Too Hot For Photosynthesis, Scientists Warn 249

Using data collected from the International Space Station (ISS), scientists found that a small yet growing percentage of tree leaves in tropical forests are approaching the maximum temperature threshold for leaves to photosynthesize," reports Live Science. If this trend continues, it could spell disaster for Earth's climate systems and biodiversity. The findings have been published in the journal Nature. From the report: The average critical temperature beyond which photosynthetic machinery in tropical trees begins to fail is 116 degrees Fahrenheit (46.7 degrees Celsius). Currently, only 0.01 % of all leaves surpass this critical temperature every year. But scientists warn that air temperature rises of 7.2 F (4 C) could push trees in tropical forests beyond a tipping point and into mass death. "It's concerning from our perspective that you see nonlinear trends. So you heat the air by, let's say, 2, 3 degrees Celsius [3.6 to 5.4 F], and the actual upper temperature of these leaves goes up by 8 degrees [Celsius; 14.4 F]," Christopher Doughty, an associate professor of ecoinformatics at Northern Arizona University, said during a press conference on Monday (Aug. 21). "Even though a small percentage of leaves are currently doing this, our best guess is that a 4 degrees Celsius increase in temperature could cause some serious issues for certain tropical forests." [...]

Plugging these peak temperatures into a mathematical model, the scientists found that an average 7 F (3.9 C) increase in the air temperature surrounding the leaves caused those most exposed to the heat to have their water-carrying stomata closed off by the tree, leading to their deaths. This triggered a cascade effect, increasing the temperature around the remaining leaves and potentially killing them, their branches and the trees in turn. "If you have 10% of the leaves dying, the whole branch is going to be warmer because a critical part of that branch can no longer cool the broader branch. Likewise you can make that assumption across the whole forest when a tree dies," Doughty said.
Space

How to Turn an Asteroid into a Space Habitat (Using Self-Replicating Spider Robots) (sciencealert.com) 65

A retired Technical Fellow from Rockwell Collins "released a 65-page paper that details an easy-to-understand, relatively inexpensive, and feasible plan to turn an asteroid into a space habitat," reports Universe Today (in an article republished at Science Alert): Dr. David W. Jensen breaks the discussion into three main categories — asteroid selection, habitat style selection, and mission strategy to get there (i.e., what robots to use)... He eventually settled on a torus as the ideal habitat type and then dives into calculations about the overall station mass, how to support the inner wall with massive columns, and how to allocate floor space.

All important, but how exactly would we build such a massive behemoth? Self-replicating robots are Dr. Jensen's answer. The report's third section details a plan to utilize spider robots and a base station that can replicate themselves. He stresses the importance of only sending the most advanced technical components from Earth and using materials on the asteroid itself to build everything else, from rock grinders to solar panels...

With admittedly "back-of-the-envelope" calculations, Dr. Jensen estimates that the program would cost only $4.1 billion. That is far less than the $93 billion NASA plans to spend on the Apollo program. And the result would be a space habitat that provides 1 billion square meters of land that didn't exist before. That's a total cost of $4.10 per square meter to build land — in space. Possibly even more impressive is the timeline — Dr. Jensen estimates that the entire construction project could be done in as little as 12 years. However, it will still take longer to fill the habitat with air and water and start regulating its temperature.

ISS

SpaceX Studies Use of Starship as a Space Station (arstechnica.com) 18

Recently Ars Technica reported on "another application for SpaceX's Starship architecture that the company is studying," adding that NASA "is on board to lend expertise.

"Though still in a nascent phase of tech development, the effort could result in repurposing Starship into a commercial space station, something NASA has a keen interest in because there are no plans for a government-owned research lab in low-Earth orbit after the International Space Station is decommissioned after 2030." NASA announced last month a new round of agreements with seven commercial companies, including SpaceX. The Collaborations for Commercial Space Capabilities (CCSC) program is an effort established to advance private sector development of emerging products and services that could be available to customers — including NASA — in approximately five to seven years... NASA passed over SpaceX's bid for a funded space station development agreement in 2021, identifying concerns about SpaceX's plans for scaling its life-support system to enable long-duration missions and SpaceX's plan for a single docking port, among other issues. The space agency isn't providing any funding for the new CCSC effort, which includes the Starship space station concept, but the government will support the industry with technical expertise, including expert assessments, lessons learned, technologies, and data.

Apart from the SpaceX agreement, NASA said it will provide non-financial support to Blue Origin's initiative to develop a crew spacecraft for orbital missions that would launch on the company's New Glenn rocket. The agency also supports Northrop Grumman's development of a human-tended research platform in low-Earth orbit to work alongside the company's planned space station. The other companies NASA picked for unfunded agreements were: Sierra Space's proposal for a crewed version of its Dream Chaser spacecraft, Vast's concept for a privately owned space station, ThinkOrbital's plan to develop welding, cutting, inspection, and additive manufacturing technology for construction work in space, and Special Aerospace Services for collaboration on an autonomous maneuvering unit to assist, or potentially replace, spacewalkers working outside a space station.

Despite the lack of NASA funding, the new collaboration announcement with SpaceX laid out — in broad strokes, at least — one of the directions SpaceX may want to take Starship. NASA said it will work with SpaceX on an "integrated low-Earth orbit architecture" that includes the Starship vehicle and other SpaceX programs, including the Dragon crew capsule and Starlink broadband network.

The artice links to a recent NASA document detailing SpaceX's space station concept. Phil McAlister, who heads NASA's commercial spaceflight division, says its size and reduced cost "could have a far-reaching impact on the sustainable development of the low-Earth orbit) economy...

"Adding increased confidence is the company's plan to self-fund Starship development from its launch and satellite enterprises."

Thanks to long-time Slashdot reader Amiga Trombone for sharing the article.
ISS

Airbus Forms Joint Venture in Bid To Replace International Space Station (ft.com) 23

Airbus is forming a joint venture with US start-up Voyager to compete to build a replacement for the International Space Station, an internationally funded laboratory in space that is due to be decommissioned by the end of the decade. From a report: The deal announced on Wednesday formalises the partnership unveiled in January on Voyager's Starlab project and will see Airbus replace US defence company Lockheed Martin as its main industrial partner. Starlab is one of the frontrunners in a race launched by Nasa four years ago to develop commercial alternatives to the ISS, which was launched 23 years ago and orbits some 420 kms above the earth.

The ISS is an international collaboration, funded by national space agencies from the US, EU, Canada, Japan and Russia. Since its launch it has hosted 258 astronauts and cosmonauts from 20 countries. Among the other contenders in the race trying to build a replacement is Jeff Bezos's Blue Origin, which is leading a consortium offering a 30,000 sq ft "ecosystem" of different habitats and services for industry, research and tourism. Nasa has allocated $550mn to four consortiums in the first phase of the competition, which will examine the spacecraft design and the business cases of each contender. The US agency has insisted each be commercially viable.

NASA

Boeing's Starliner Program Reaches Staggering $1.1 Billion in Losses (gizmodo.com) 78

Boeing's CST-100 Starliner program, developed for NASA since 2014, has incurred total losses exceeding $1 billion, with an additional $257 million loss announced in the second quarter of 2023. Gizmodo reports: Boeing's total losses now amount to a staggering $1.14 billion for the Starliner program. The impact of these setbacks is evident in the company's Defense, Space, and Security division, which reported a significant loss of $527 million during the second quarter, with the Starliner project accounting for a substantial portion of this downturn, according to Ars Technica. Adding insult to injury, there's still no indication as to when Starliner will perform its first flight with a crew on board.

Boeing, currently operating under a fixed-price contract with NASA, is obligated to absorb any additional costs. The company signed a $4.2 billion contract in 2014 as part of NASA's Commercial Crew Program, encompassing six operational Starliner missions. NASA also holds a parallel contract with SpaceX. Since 2020, SpaceX's Crew Dragon capsule has completed six crewed flights for NASA, with a seventh mission planned for this coming August and an eighth tentatively planned for February 2024. Boeing has yet to fly Starliner with a crew on board, though it did perform a reasonably successful uncrewed mission in May 2022.

In its latest financial earnings statement, Boeing said the Starliner program "recorded a $257 million loss primarily due to the impacts of the previously announced launch delay." The company initially aimed for a Crew Flight Test (CFT) launch on July 1, with NASA astronauts Sunita Williams and Barry "Butch" Wilmore destined for the International Space Station (ISS). However, Boeing announced an indefinite delay to the launch on June 1 due to the discovery of two major safety issues. The first problem has to do with the load capacity of Starliner's three parachutes, designed to ensure a safe landing for the crew vehicle. The fabric sections of the parachutes have a failure load limit lower than anticipated, implying that if one parachute fails, the remaining two would be incapable of adequately decelerating the spacecraft for its landing in New Mexico. The second issue involves hundreds of feet of protective tape used to insulate the wiring harnesses inside the Starliner vehicle, which were found to be flammable. Mark Nappi, Boeing Starliner program manager and vice president, explained during the June briefing that it's too late to remove the flammable tape without inflicting further damage to the vehicle. Instead, Boeing and NASA are considering solutions involving additional wrapping over the existing tape in high-risk areas to mitigate fire hazards.
On Wednesday, Boeing President and CEO David Calhoun said: "On Starliner, we are in lockstep with our customer. We prioritize safety and we're taking whatever time is required. We're confident in that team and committed to getting it right."

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