"Engineers have sent a 'poke' to the Voyager 1 probe," reports CNN, "and received a potentially encouraging response..."

"A new signal recently received from the spacecraft suggests that the NASA mission team may be making progress in its quest to understand what Voyager 1 is experiencing..." [T]hey hope to fix a communication issue with the aging spacecraft that has persisted for five months. Launched in 1977, Voyager 1 and its twin, Voyager 2, are venturing through uncharted cosmic territory along the outer reaches of the solar system. While Voyager 1 has continued to relay a steady radio signal to its mission control team on Earth, that signal has not carried any usable data since November, which has pointed to an issue with one of the spacecraft's three onboard computers...

On March 3, the team noticed that activity from one part of the flight data system stood out from the rest of the garbled data. While the signal wasn't in the format the Voyager team is used to when the flight data system is functioning as expected, an engineer with NASA's Deep Space Network was able to decode it... The decoded signal included a readout of the entire flight data system's memory, according to an update NASA shared.

"The (flight data system) memory includes its code, or instructions for what to do, as well as variables, or values used in the code that can change based on commands or the spacecraft's status," according to a NASA blog post. "It also contains science or engineering data for downlink. The team will compare this readout to the one that came down before the issue arose and look for discrepancies in the code and the variables to potentially find the source of the ongoing issue."
"The source of the issue appears to be with one of three onboard computers, the flight data subsystem (FDS), which is responsible for packaging the science and engineering data before it's sent to Earth," according to NASA's statement.

CNN reminds readers that Voyager 1 "is currently the farthest spacecraft from Earth at about 15 billion miles (24 billion kilometers) away." Both Voyager 1 and Voyager 2 are now in interstellar space.

Thanks to Slashdot reader Thelasko for sharing the news.

The Washington Post reports: Nearly a decade ago, Congress passed a law that allows private American space companies the rights to resources they mine on celestial bodies, including the moon.

Now, there's a private venture that says it intends to do just that.

Founded by a pair of former executives from Blue Origin, the space venture founded by Jeff Bezos, and an Apollo astronaut, the company, Interlune, announced itself publicly Wednesday by saying it has raised $18 million and is developing the technology to harvest and bring materials back from the moon... Specifically, Interlune is focused on Helium-3, a stable isotope that is scarce on Earth but plentiful on the moon and could be used as fuel in nuclear fusion reactors as well as helping power the quantum computing industry.

The company, based in Seattle, has been working for about four years on the technology, which comes as the commercial sector is working with NASA on its goal of building an enduring presence on and around the moon... Rob Meyerson, the former president of Blue Origin, co-founded Interlune with Gary Lai, another former executive at Blue, and Harrison Schmitt, a geologist who flew to the moon during Apollo 17... In an interview, Meyerson said that the company intends to be the first to collect, return and then sell lunar resources and test the 2015 law. There is a large demand for Helium-3 in the quantum computing industry, which requires some of its systems to operate in extremely cold temperatures, and Interlune has already lined up a "customer that wants to buy lunar resources in large quantities," he said.

"We intend to be the first to go commercialize and deliver and support those customers," he said. NASA might want to be a customer as well. In 2020, it said it was looking for companies to collect rocks and dirt from the lunar surface and sell them to NASA as part of a technology development program that would eventually help astronauts "live off the land...." The company's funding round was led by the venture capital firm Seven Seven Six, whose founder and general partner, Alexis Ohanian, said that the space sector has become far more appealing to investors. "The space economy is something we can actually talk about with a straight face now, and I think some of the smartest people on the planet are making those efforts," he said...

He said he was aware that it might take years, or longer for a moon mining business to make money. But he said that, "we're comfortable waiting for a decade plus to see those returns."
NASA is planning more missions like the Intuitive Machines landing earlier this year, according to the article, "which it says will not only help pave the way for humans to return to the moon but for private industry to begin commercial operations there as well." Interlune plans "a prospecting machine" as soon as 2026, followed by an "end-to-end demonstration" in 2028 that harvests and returns a small quanity of Helium-3, and then full-scale operations by 2030.

"China has also said that it is interested in extracting other resources, including Helium-3, which it said was present in a sample it returned from the moon in 2020."

An anonymous reader quotes a report from The Guardian: Underwater speakers that broadcast the hustle and bustle of thriving coral could bring life back to more damaged and degraded reefs that are in danger of becoming ocean graveyards, researchers say. Scientists working off the US Virgin Islands in the Caribbean found that coral larvae were up to seven times more likely to settle at a struggling reef where they played recordings of the snaps, groans, grunts and scratches that form the symphony of a healthy ecosystem. "We're hoping this may be something we can combine with other efforts to put the good stuff back on the reef," said Nadeege Aoki at the Woods Hole Oceanographic Institution in Massachusetts. "You could leave a speaker out for a certain amount of time and it could be attracting not just coral larvae but fish back to the reef."

The world has lost half its coral reefs since the 1950s through the devastating impact of global heating, overfishing, pollution, habitat loss and outbreaks of disease. The hefty declines have fueled efforts to protect remaining reefs through approaches that range from replanting with nursery-raised corals to developing resilient strains that can withstand warming waters. Aoki and her colleagues took another tack, building on previous research which showed that coral larvae swim towards reef sounds. They set up underwater speakers at three reefs off St John, the smallest of the US Virgin Islands, and measured how many coral larvae, held in sealed containers of filtered sea water, settled on to pieces of rock-like ceramic in the containers up to 30 meters from the speakers.

While the researchers installed speakers at all three sites, they only played sounds from a thriving reef at one: the degraded Salt Pond reef, which was bathed in the marine soundscape for three nights. The other two sites, the degraded Cocoloba and the healthier Tektite reefs were included for comparison. When coral larvae are released into the water column they are carried on the currents, and swim freely, before finding a spot to settle. Once they drop to the ocean floor, they become fixed to the spot and -- if they survive -- mature into adults. Writing in the Royal Society Open Science journal, the researchers describe how, on average, 1.7 times more coral larvae settled at the Salt Pond reef than at the other sites where no reef sounds were played. The settlement rates at Salt Pond dropped with distance from the speaker, suggesting the broadcasts were responsible. While the results are promising, Aoki said more work is afoot to understand whether other coral species respond to reef sounds in the same way, and whether the corals thrive after settling. "You have to be very thoughtful about the application of this technology," Aoki added. "You don't want to encourage them to settle where they will die. It really has to be a multi-pronged effort with steps in place to ensure the survival of these corals and their growth over time."

Jason Rainbow reports via SpaceNews: SpaceX has secured conditional approval to use extremely high-frequency E-band radio waves to improve the capacity of its low Earth orbit Starlink broadband constellation. The Federal Communications Commission said March 8 it is allowing SpaceX to use E-band frequencies between second-generation Starlink satellites and gateways on the ground, alongside already approved spectrum in the Ka and Ku bands. Specifically, SpaceX is now also permitted to communicate between 71 and 76 gigahertz from space to Earth, and 81-86 GHz Earth-to-space, using the up to 7,500 Gen2 satellites SpaceX is allowed to deploy.

SpaceX has plans for 30,000 Gen2 satellites, on top of the 4,400 Gen1 satellites already authorized by the FCC. However, the FCC deferred action in December 2022 on whether to allow SpaceX to deploy the other three-quarters of its Gen2 constellation, which includes spacecraft closer to Earth to improve broadband speeds. The regulator also deferred action at the time on SpaceX's plans to use E-band frequencies, citing a need to first establish ground rules for using them in space. In a March 8 regulatory filing, the FCC said it found "SpaceX's proposed operations in the E-band present no new or increased frequency conflicts with other satellite operations." But the order comes with multiple conditions, including potentially forcing SpaceX to modify operations if another satellite operator also seeks to use the radio waves.

12P/Pons-Brooks, a Halley-type comet larger than Mount Everest and with a 71.3-year orbit, is expected to become visible to the naked eye in the coming weeks as it makes its closest approach to the sun on April 21. The Guardian reports: While some reports suggest 12P/Pons-Brooks was spotted as far back as the 14th century, it is named after the French astronomer Jean-Louis Pons who discovered it in 1812 and the British-American astronomer William Robert Brooks who observed it on its next orbit in 1883. Thought to have a nucleus about 30km (20 miles) in diameter, it is classed as a cryovolcanic comet, meaning it erupts with dust, gases and ice when pressure builds inside as it is heated. One such outburst last year caused it to brighten a hundredfold and garnered it the sobriquet of "the Devil Comet" after the haze that surrounds it formed a horned shape.

While the comet -- and its green tinge -- has already been spotted in the night sky, experts say it is expected to become even brighter in the coming weeks. "The comet is expected to reach a magnitude of 4.5 which means it ought to be visible from a dark location in the UK," said Dr Paul Strom, an astrophysicist at the University of Warwick. "The comet moves from the constellation of Andromeda to Pisces. As it does so it passes by bright stars which will make it easier to spot on certain dates. In particular, on March 31 12P/Pons-Brooks will be only 0.5 a degree from the bright star called Hamal," he said. But Dr Robert Massey, the deputy executive director of the Royal Astronomical Society, said even if the comet did become brighter it could still be difficult to see, adding that basic instruments such as small telescopes would greatly help.

"If you have a half-decent pair of binoculars, certainly attempt to look for it with those," said Massey, adding that apps that map the sky were also useful. The best views of the comet are currently to be found in the northern hemisphere. Massey said those who wanted to catch a glimpse should venture out on a clear evening and look low in the west-north-west as twilight came to an end. "You want to avoid haze, you want to avoid moonlight, you want to avoid light pollution."

China is using AI in the operation of its 45,000km (28,000-mile) high-speed rail network, with the technology achieving several milestones, according to engineers involved in the project. From a report: An AI system in Beijing is processing vast amounts of real-time data from across the country and can alert maintenance teams of abnormal situations within 40 minutes, with an accuracy as high as 95 per cent, they said in a peer-reviewed paper. "This helps on-site teams conduct reinspections and repairs as quickly as possible," wrote Niu Daoan, a senior engineer at the China State Railway Group's infrastructure inspection centre, in the paper published by the academic journal China Railway.

In the past year, none of China's operational high-speed railway lines received a single warning that required speed reduction due to major track irregularity issues, while the number of minor track faults decreased by 80 per cent compared to the previous year. According to the paper, the amplitude of rail movement caused by strong winds also decreased -- even on massive valley-spanning bridges -- with the application of AI technology. [...] According to the paper, after years of effort Chinese railway scientists and engineers have "solved challenges" in comprehensive risk perception, equipment evaluation, and precise trend predictions in engineering, power supply and telecommunications. The result was "scientific support for achieving proactive safety prevention and precise infrastructure maintenance for high-speed railways," the engineers said.

None of the big oil and gas producers surrounding the North Sea plan to stop drilling soon enough to meet the 1.5C (2.7F) global heating target, a report has found. From a report: The five countries -- the UK, Germany, the Netherlands, Norway and Denmark -- have failed to align their oil and gas policies with their climate promises under the Paris agreement, according to the campaign group Oil Change International.

North Sea governments must act urgently, said Silje Ask Lundberg from Oil Change International, who co-wrote the report. "Failure to address these issues not only undermines international climate goals, but also jeopardises the liveability of our planet." The report found that policies in Norway and the UK were furthest from the Paris climate agreement because the countries were "aggressively" exploring and licensing new oil and gas fields. In 2021, the International Energy Agency found there was no room for new oil exploration in its pathway to net zero emissions.

China unleashed the full might of its solar energy industry last year. It installed more solar panels than the United States has in its history. It cut the wholesale price of panels it sells by nearly half. And its exports of fully assembled solar panels climbed 38 percent while its exports of key components almost doubled. Get ready for an even bigger display of China's solar energy dominance. The New York Times: While the United States and Europe are trying to revive renewable energy production and help companies fend off bankruptcy, China is racing far ahead. At the annual session of China's legislature this week, Premier Li Qiang, the country's second-highest official after Xi Jinping, announced that the country would accelerate the construction of solar panel farms as well as wind and hydroelectric projects.

With China's economy stumbling, the ramped-up spending on renewable energy, mainly solar, is a cornerstone of a big bet on emerging technologies. China's leaders say that a "new trio" of industries -- solar panels, electric cars and lithium batteries -- has replaced an "old trio" of clothing, furniture and appliances. The goal is to help offset a steep slump in China's housing construction sector. China hopes to harness emerging industries like solar power, which Mr. Xi likes to describe as "new productive forces," to re-energize an economy that has slowed for more than a decade. The emphasis on solar power is the latest installment in a two-decade program to make China less dependent on energy imports.

CNN's national security analyst interviewed a U.S. intelligence officer who worked on the newly-released Defense report debunking UFO sightings — physicist Sean Kirkpatrick. He tells CNN "about two to five percent" of UFO reports are "truly anomalous."

But CNN adds that "he thinks explanations for that small percentage will most likely be found right here on Earth..." This is how Kirkpatrick and his team explain the Roswell incident, which plays a prominent role in UFO lore. That's because, in 1947, a U.S. military news release stated that a flying saucer had crashed near Roswell Army Air Field in New Mexico. A day later, the Army retracted the story and said the crashed object was a weather balloon. Newspapers ran the initial saucer headline, followed up with the official debunking, and interest in the case largely died down. Until 1980, that is, when a pair of UFO researchers published a book alleging that alien bodies had been recovered from the Roswell wreckage and that the U.S. government had covered up the evidence.

Kirkpatrick says his office dug deep into the Roswell incident and found that in the late 1940s and early 1950s, there were a lot of things happening near the Roswell Airfield. There was a spy program called Project Mogul, which launched long strings of oddly shaped metallic balloons. They were designed to monitor Soviet nuclear tests and were highly secret. At the same time, the U.S. military was conducting tests with other high-altitude balloons that carried human test dummies rigged with sensors and zipped into body-sized bags for protection against the elements. And there was at least one military plane crash nearby with 11 fatalities.

Echoing earlier government investigations, Kirkpatrick and his team concluded that the crashed Mogul balloons, the recovery operations to retrieve downed test dummies and glimpses of the charred aftermath of that real plane crash likely combined into a single false narrative about a crashed alien spacecraft...

Since 2020, the Pentagon has standardized, de-stigmatized and increased the volume of reporting on UFOs by the U.S. military. Kirkpatrick says that's the reason the closely covered and widely-mocked Chinese spy balloon was spotted in the first place last year. The incident shows that the U.S. government's policy of taking UFOs seriously is actually working.
The pattern keeps repeating. "Kirkpatrick says, his investigation found that most UFO sightings are of advanced technology that the U.S. government needs to keep secret, of aircraft that rival nations are using to spy on the U.S. or of benign civilian drones and balloons." ("What's more likely?" asked Kirkpatrick. "The fact that there is a state-of-the-art technology that's being commercialized down in Florida that you didn't know about, or we have extraterrestrials?")

But the greatest irony may be that "stories about these secret programs spread inside the Pentagon, got embellished and received the occasional boost from service members who'd heard rumors about or caught glimpses of seemingly sci-fi technology or aircraft. And Kirkpatrick says his investigators ultimately traced this game of top-secret telephone back to fewer than a dozen people... [F]or decades, UFO true believers have been telling us there's a U.S. government conspiracy to hide evidence of aliens. But — if you believe Kirkpatrick — the more mundane truth is that these stories are being pumped up by a group of UFO true believers in and around government."

Science magazine "has confirmed that a panel of two dozen geologists has voted down a proposal to end the Holocene — our current span of geologic time, which began 11,700 years ago at the end of the last ice age — and inaugurate a new epoch, the Anthropocene.

"Starting in the 1950s, it would have marked a time when humanity's influence on the planet became overwhelming." The vote, first reported by The New York Times, is a stunning — though not unexpected — rebuke for the proposal, which has been working its way through a formal approval process for more than a decade... [S]ome felt the proposed marker of the epoch — some 10 centimeters of mud from Canada's Crawford Lake that captures the global surge in fossil fuel burning, fertilizer use, and atomic bomb fallout that began in the 1950s — isn't definitive enough. Others questioned whether it's even possible to affix one date to the start of humanity's broad planetary influence: Why not the rise of agriculture? Why not the vast changes that followed European encroachment on the New World?
Stanley Finney, a stratigrapher at California State University Long Beach and head of the International Union of Geological Sciences, said "It would have been rejected 10 years earlier if they had not avoided presenting it to the stratigraphic community for careful consideration." Finney also complains that from the start, AWG was determined to secure an "epoch" categorization, and ignored or countered proposals for a less formal Anthropocene designation.... The Anthropocene backers will now have to wait for a decade before their proposal can be considered again...

Even if it is not formally recognized by geologists, the Anthropocene is here to stay. It is used in art exhibits, journal titles, and endless books... And others have advanced the view that it can remain an informal geologic term, calling it the "Anthropocene event...."
From the New York Times: Geoscientists don't deny our era stands out within that long history. Radionuclides from nuclear tests. Plastics and industrial ash. Concrete and metal pollutants. Rapid greenhouse warming. Sharply increased species extinctions. These and other products of modern civilization are leaving unmistakable remnants in the mineral record, particularly since the mid-20th century. Still, to qualify for its own entry on the geologic time scale, the Anthropocene would have to be defined in a very particular way, one that would meet the needs of geologists and not necessarily those of the anthropologists, artists and others who are already using the term.

That's why several experts who have voiced skepticism about enshrining the Anthropocene emphasized that the vote against it shouldn't be read as a referendum among scientists on the broad state of the Earth. "This was a narrow, technical matter for geologists, for the most part," said one of those skeptics, Erle C. Ellis, an environmental scientist at the University of Maryland, Baltimore County. "This has nothing to do with the evidence that people are changing the planet," Dr. Ellis said. "The evidence just keeps growing."

Francine M.G. McCarthy, a micropaleontologist at Brock University in St. Catharines, Ontario, is the opposite of a skeptic: She helped lead some of the research to support ratifying the new epoch. "We are in the Anthropocene, irrespective of a line on the time scale," Dr. McCarthy said. "And behaving accordingly is our only path forward."
Thanks to Slashdot reader sciencehabit for sharing the news.

An anonymous reader shared this article from the Washington Post: A much-debated theory holds that 4 billion years ago, give or take, long before the appearance of dinosaurs or even bacteria, the primordial soup contained only the possibility of life. Then a molecule called RNA took a dramatic step into the future: It made a copy of itself. Then the copy made a copy, and over the course of many millions of years, RNA begot DNA and proteins, all of which came together to form a cell, the smallest unit of life able to survive on its own.

Now, in an important advance supporting this RNA World theory, scientists at the Salk Institute for Biological Studies in La Jolla, Calif., have carried out a small but essential part of the story. In test tubes, they developed an RNA molecule that was able to make accurate copies of a different type of RNA. The work, published in the journal Proceedings of the National Academy of Sciences, gets them closer to the grand goal of growing an RNA molecule that makes accurate copies of itself.

"Then it would be alive," said Gerald Joyce, president of Salk and one of the authors of the new paper. "So, this is the road to how life can arise in a laboratory or, in principle, anywhere in the universe...."

John Chaput, a professor of pharmaceutical sciences at the University of California at Irvine who did not participate in the study, called the crossing of that threshold by the Salk team "monumental," adding that "at first, I looked on it as a little bit jaw-dropping. ... It's super-neat."
The Post adds that "the scenario they tested probably mimics one of the earliest stirrings of evolution." And Michael Kay, a professor of biochemistry at University of Utah, says the new paper has given the RNA World theory "key evidence" to show "it is plausible and reasonable." He added that the RNA copier developed at Salk will "provide a valuable tool for people wanting to do directed evolution experiments."

An anonymous Slashdot reader shared this article from Live Science: Manufacturers will no longer use harmful "forever chemicals" in food packaging products in the U.S., according to the U.S. Food and Drug Administration (FDA).

In a statement released February 28, the agency declared that grease-proofing materials that contain per- and polyfluoroalkyl substances (PFAS) will not be used in new food packaging sold in the U.S. These include PFAS used in fast-food wrappers, microwave popcorn bags, takeout boxes and pet food bags. The FDA's announcement marks the completion of a voluntary phase-out of the materials by U.S. food packaging manufacturers.

This action will eliminate the "major source of dietary exposure to PFAS," Jim Jones, deputy commissioner for human foods at the FDA, said in an associated statement. Companies told the FDA that it could take up to 18 months to completely exhaust the market supply of these products following their final date of sale. However, most of the affected manufacturers phased out the products faster than they initially predicted, the agency noted...

The FDA's new announcement marks a "huge win for the public," Graham Peaslee, a professor of physics at the University of Notre Dame who studies PFAS, told The Washington Post.

Remember Avi Loeb, the Harvard professor who claims fragments of alien technology turned up in a high-speed meteor he retrieved from the waters off of Papua, New Guinea?

"Reanalysis of seismic data now suggests Loeb may have been looking for the meteor remnants in the wrong place," writes the Washington Post: The analysis, led by seismologist Benjamin Fernando of Johns Hopkins University, contends that sound waves purportedly from the meteor exploding in the atmosphere, and cited by Loeb as helping to locate the meteor's debris field, were most likely from a truck driving on a road near the seismometer.
"Interstellar signal linked to aliens was actually just a truck," reads the headline on an announcement from Johns Hopkins University. "The fireball location was actually very far away from where the oceanographic expedition went to retrieve these meteor fragments," Fernando says in the announcement. "Not only did they use the wrong signal, they were looking in the wrong place." Using data from stations in Australia and Palau designed to detect sound waves from nuclear testing, Fernando's team identified a more likely location for the meteor, more than 100 miles from the area initially investigated. They concluded the materials recovered from the ocean bottom were tiny, ordinary meteorites — or particles produced from other meteorites hitting Earth's surface mixed with terrestrial contamination.
"There are hundreds of signals that look just like this on that seismometer in Papua New Guinea in the days before and the days after," Fernando told the Washington Post.

But the newspaper adds that "Loeb, however, stands his ground." "The seismic data is completely irrelevant to the location of the meteor," Loeb told The Washington Post. He said his team based its search coordinates primarily on satellite data from the United States military. A three-year analysis by the United States Space Command supported the hypothesis that the meteor's extreme velocity indicated an origin outside our solar system, Loeb said...

[Fernando] said his team believes the purported velocity of the meteor is the result of a measurement error by a sensor. "We think the most likely case is it's a natural meteor from within our solar system," he said.

In any case, Loeb is not done with the search. When he gets sufficient funding, he told The Post, he's going back to the Pacific in search of larger pieces of whatever splashed into the sea.

An anonymous reader shared this report from the Washington Post: The Earth just observed its warmest February, setting a monthly record for the ninth time in a row, the European Union's Copernicus Climate Change Service announced Wednesday.

The unrelenting and exceptional global warmth — fueled by a combination of human-caused warming and the El Niño climate pattern — has spanned both land and ocean areas since June. It has scientists worried about the planet crossing a critical climate threshold and prospects for an active Atlantic hurricane season. The month's average global air temperature of 13.5 degrees Celsius (56.3 degrees Fahrenheit) was 0.12 degrees (0.22 degrees Fahrenheit) warmer than the previous warmest February in 2016.

The warmth of the last 12-month period is unprecedented in modern records, coming in at 1.56 degrees (2.8 degrees Fahrenheit) warmer than preindustrial levels... Scientists fear that tipping points, such as those that could lead to catastrophic sea level rises or the collapse of critical ocean circulations, will become more likely to be reached if the Earth's temperature remains near or above that threshold for multiple years.
Axios adds: This is significant, since these 12 months exceeded the Paris Agreement's 1.5-degree target for a full year. However, the pact is aimed at averting multiple decades above that level, meaning the target hasn't yet been officially breached. Europe was especially warm compared to average during February, along with central and northwest North America, much of South America, Africa and western Australia, Copernicus found.
The Washington Post notes that in the United States, "more than 200 locations in the Midwest and Northeast set records for winter warmth."

They also quote a weather historian who posted on social media that "We are witnessing something extraordinary and unprecedented. Several thousands of records pulverized all over the world in a matter of hours, with margins never seen before."

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."

Astronomers have observed a distant planet that could be entirely covered in a deep water ocean, in findings that advance the search for habitable conditions beyond Earth. From a report: The observations, by Nasa's James Webb space telescope (JWST), revealed water vapour and chemical signatures of methane and carbon dioxide in the atmosphere of the exoplanet, which is twice Earth's radius and about 70 light years away. This chemical mix is consistent with a water world where the ocean would span the entire surface, and a hydrogen-rich atmosphere, according to researchers from the University of Cambridge, although they do not envisage a balmy, inviting seascape. "The ocean could be upwards of 100 degrees [Celsius] or more," said Prof Nikku Madhusudhan, who led the analysis. At high atmospheric pressure, an ocean this hot could still be liquid, "but it's not clear if it would be habitable," he added.

This interpretation is favoured in a paper published in the journal Astronomy and Astrophysics Letters, but is disputed by a Canadian team that made additional observations of the same exoplanet, which is known as TOI-270 d. They detected the same atmospheric chemicals but argue the planet would be too hot for liquid water -- possibly 4,000C -- and instead would feature a rocky surface topped by an incredibly dense atmosphere of hydrogen and water vapour. Whichever view wins out, these latest observations showcase the stunning insights James Webb is giving into the nature of planets beyond our solar system. The telescope captures the starlight that has been filtered through the atmospheres of orbiting planets to give detailed breakdowns of the chemical elements present. From this, astronomers can build up a picture of conditions at a planet's surface -- and the likelihood of life being able to survive there.

An anonymous reader shares a report: In the 1960s, secret test flights of advanced government spy planes generated U.F.O. sightings. More recently, government and commercial drones, new kinds of satellites and errant weather balloons have led to a renaissance in unusual observations. But, according to a new report, none of these sightings were of alien spacecraft. The new congressionally mandated Pentagon report found no evidence that the government was covering up knowledge of extraterrestrial technology and said there was no evidence that any U.F.O. sightings represented alien visitation to Earth.

The 63-page document is the most sweeping rebuttal the Pentagon has issued in recent years to counter claims that it has information on extraterrestrial visits or technology. But amid widespread distrust of the government, the report is unlikely to calm a growing obsession with aliens. Maj. Gen. Patrick Ryder, a Defense Department spokesman, said the Pentagon approached the report with an open mind and no preconceived notions, but simply found no evidence to back up claims of secret programs, hidden alien technology or anything else extraterrestrial. The new report suggests that the public's belief that the government is hiding what it knows will probably continue. The report adds: Nevertheless the public is unlikely to be swayed. Many people dismiss the government's claims that nothing interesting is going on in Pentagon videos that appear to show strange objects, citing accounts by Navy pilots that they observed objects whose movements cannot be easily explained. The new report notes that in the past, particularly in the 1950s, there was interest in U.F.O.s, but today the attention on unexplained sightings is greater than ever before. Politico adds: The Pentagon has disclosed that the government once considered a program to recover and reverse-engineer any captured alien spacecraft, an effort that never came to fruition but fueled conspiracy theories about a cover-up.

An anonymous reader quotes a report from The Guardian: Doctors have warned of potentially life-threatening effects from plastic pollution after finding a substantially raised risk of stroke, heart attack and earlier death in people whose blood vessels were contaminated with microscopic plastics. Researchers in Naples examined fatty plaques removed from the blood vessels of patients with arterial disease and found that more than half had deposits contaminated with tiny particles of polyethylene or polyvinyl chloride (PVC). Those whose plaques contained microplastics or nanoplastics were nearly five times more likely to suffer a stroke, heart attack or death from any cause over the following 34 months, compared with those whose plaques were free from plastic contamination. The findings do not prove that plastic particles drive strokes and heart attacks -- people who are more exposed to the pollution may be at greater risk for other reasons -- but research on animals and human cells suggests the particles may be to blame. [...]

Writing in the New England Journal of Medicine, the doctors describe how they analyzed fatty plaques removed from 304 patients with atherosclerosis affecting the carotid arteries. The carotid arteries are the main blood vessels that supply blood to the neck, face and brain. The disease causes a build-up of plaque in the arteries, which substantially raises the risk of stroke. The plaques can be removed by a procedure called carotid endarterectomy. Lab tests on the extracted plaques revealed polyethylene in 150 patients and polyvinyl chloride in 31, alongside signs of inflammation. On examination under an electron microscope, the researchers spotted jagged foreign particles in the fatty deposits, most less than a thousandth of a millimeter across. The doctors followed 257 of the patients for an average of 34 months after they had carotid plaques removed. Those who had plastic particles in their plaques were 4.5 times more likely to have a stroke or heart attack, or to die from any cause, than those whose plaques were free from plastic pollution. "People must become aware of the risks we are taking with our lifestyle," said Dr Raffaele Marfella, first author on the study at the University of Campania Luigi Vanvitelli in Naples. "I hope the alarm message from our study will raise the consciousness of citizens, especially governments, to finally become aware of the importance of the health of our planet. To put it in a slogan that can unite the need for health for humans and the planet, plastic-free is healthy for the heart and the Earth."

The 46-year-old probe, which flew by Jupiter and Saturn in its youth and inspired earthlings with images of the planet as a "Pale Blue Dot," hasn't sent usable data from interstellar space in months. From a report: When Voyager 1 launched in 1977, scientists hoped it could do what it was built to do and take up-close images of Jupiter and Saturn. It did that -- and much more. Voyager 1 discovered active volcanoes, moons and planetary rings, proving along the way that Earth and all of humanity could be squished into a single pixel in a photograph, a "pale blue dot," as the astronomer Carl Sagan called it. It stretched a four-year mission into the present day, embarking on the deepest journey ever into space. Now, it may have bid its final farewell to that faraway dot.

Voyager 1, the farthest man-made object in space, hasn't sent coherent data to Earth since November. NASA has been trying to diagnose what the Voyager mission's project manager, Suzanne Dodd, called the "most serious issue" the robotic probe has faced since she took the job in 2010. The spacecraft encountered a glitch in one of its computers that has eliminated its ability to send engineering and science data back to Earth. The loss of Voyager 1 would cap decades of scientific breakthroughs and signal the beginning of the end for a mission that has given shape to humanity's most distant ambition and inspired generations to look to the skies.

A washing-machine-sized satellite is to "name and shame" the worst methane polluters in the oil and gas industry. From a report: MethaneSat will provide the first near-comprehensive global view of leaks of the potent greenhouse gas from the oil and gas sector, and all of the data will be made public. It will provide high-resolution data over wider areas than existing satellites. Methane, also called natural gas, is responsible for 30% of the global heating driving the climate crisis. Leaks from the fossil fuel industry are a major source of human-caused emissions and stemming these is the fastest single way to curb temperature rises.

MethaneSat was developed by the Environmental Defense Fund, a US NGO, in partnership with the New Zealand Space Agency and cost $88m to build and launch. Earlier EDF measurements from planes show methane emissions were 60% higher than calculated estimates published by US authorities and elsewhere. More than 150 countries have signed a global methane pledge to cut their emissions of the gas by 30% from 2020 levels by 2030. Some oil and gas companies have made similar pledges, and new regulations to limit methane leaks are being worked on in the US, EU, Japan and South Korea.

The EDF's senior vice-president, Mark Brownstein, said: "MethaneSat is a tool for accountability . I'm sure many people think this could be used to name and shame companies who are poor emissions performers, and that's true. But [it] can [also] help document progress that leading companies are making in reducing their emissions." The oil and gas industry knows how to stop leaks and the cost of doing so is usually very modest, said Steven Hamburg, the EDF's chief scientist and MethaneSat project leader: "Some call it low hanging fruit. I like to call it fruit lying on the ground."