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.

Justine Calma writes via The Verge: A group of young plaintiffs reached a historic climate settlement with the state of Hawaii and Hawaii Department of Transportation in a deal that will push the state to clean up tailpipe pollution. The 13 youth plaintiffs filed suit in 2022 when they were all between the ages of 9 and 18. In the suit, Navahine F. v. Hawaii Department of Transportation (HDOT), they alleged that the state and HDOT had violated their right to "a clean and healthful environment," which is enshrined in Hawaii's constitution.

The settlement (PDF), reached on Thursday, affirms that right and commits the DOT to creating a plan to reach zero greenhouse gas emissions from transportation by 2045. To hit that goal, the state will have to dedicate at least $40 million to building out its EV charging network by the end of the decade and complete new pedestrian, bicycle, and transit networks over the next five years. The settlement also creates a new unit within HDOT tasked with coordinating CO2 emission reductions and a volunteer youth council to advise HDOT.

This is the first settlement agreement in which "government defendants have decided to resolve a constitutional climate case in partnership with youth plaintiffs," according to nonprofit legal groups Our Children's Trust and Earthjustice, which represent the plaintiffs. Back in 2018, Hawaii committed to reaching net-zero carbon dioxide emissions by 2045 -- in line with what climate research determined was necessary to meet the Paris climate accord goal of stopping global warming. But the state wasn't doing enough to reach that goal, the plaintiffs alleged. Transportation makes up the biggest chunk of the state's greenhouse gas pollution. Justine Calma is a senior science reporter covering energy and the environment with more than a decade of experience. She is also the host of Hell or High Water: When Disaster Hits Home, a podcast from Vox Media and Audible Originals.

Millions of mosquitoes are being released from helicopters in Hawaii in a last-ditch attempt to save rare birds slipping into extinction. From a report: The archipelago's endemic, brightly coloured honeycreeper birds are dying of malaria carried by mosquitoes first introduced by European and American ships in the 1800s. Having evolved with no immunity to the disease, the birds can die after just a single bite. Thirty-three species of honeycreeper have become extinct and many of the 17 that remain are highly endangered, with concerns some could be extinct within a year if no action is taken. Now conservationists are urgently trying to save them with an unusual strategy: releasing more mosquitoes.

Every week a helicopter drops 250,000 male mosquitoes with a naturally occurring bacterium that acts as birth control on to the islands of the remote archipelago. Already, 10 million have been released. "The only thing that's more tragic is if [the birds] went extinct and we didn't try. You can't not try," said Chris Warren, the forest bird programme coordinator for Haleakala national park on the island of Maui. The population of one honeycreeper, the Kaua'i creeper, or 'akikiki, has dropped from 450 in 2018 to five in 2023, with just one single bird known to be left in the wild on Kaua'i island, according to the national park service.

Amazon aims to completely remove plastic air pillows from its packaging in North America by year-end. Going forward, they will be replaced with paper fillers made from 100% recycled content. CNBC reports: It marks Amazon's largest plastic-packaging reduction effort and will help it remove nearly 15 billion plastic pillows annually. "We are working towards full removal in North America by end of year and will continue to innovate, test, and scale in order to prioritize curbside recyclable materials," VP of Mechatronics and Sustainable Packaging Pat Lindner said in the announcement.

An anonymous reader shares a report: Punishing heat waves gripped three continents on Tuesday, breaking records in cities around the Northern Hemisphere less than two weeks after the Earth recorded what scientists said were likely its hottest days in modern history. Firefighters in Greece scrambled to put out wildfires, as parched conditions raised the risk of more blazes throughout Europe. Beijing logged another day of 95-degree heat, and people in Hangzhou, another Chinese city, compared the choking conditions to a sauna. From the Middle East to the American Southwest, delivery drivers, airport workers and construction crews labored under blistering skies. Those who could stay indoors did.

The temperatures, afflicting so much of the world all at once, were a withering reminder that climate change is a global crisis, driven by human-made forces: the emissions of heat-trapping gases, mainly caused by the burning of fossil fuels. John Kerry, the U.S. special envoy for climate change, sought to coordinate some of the global response with the Chinese premier in Beijing, as a heat wave clutched a huge swath of China. "The world really is looking to us for that leadership, particularly on the climate issue," Mr. Kerry told Chinese officials. "Climate, as you know, is a global issue, not a bilateral issue. It's a threat to all of humankind."

The planet has warmed about 2 degrees Fahrenheit since the 19th century and will continue to grow hotter until humans essentially stop burning coal, oil and gas, scientists say. The warmer temperatures contribute to extreme weather events and help make periods of extreme heat more frequent, longer and more intense. Also affecting this year's conditions is the return of El Nino, a cyclical weather pattern that, depending on the sea surface temperature and the pressure of the air above it, can originate in the Pacific and have wide-ranging effects on weather around the world.

An anonymous reader quotes a report from Phys.Org: When old satellites fall into Earth's atmosphere and burn up, they leave behind tiny particles of aluminum oxide, which eat away at Earth's protective ozone layer. A new study finds that these oxides have increased 8-fold between 2016 and 2022 and will continue to accumulate as the number of low-Earth-orbit satellites skyrockets. The 1987 Montreal Protocol successfully regulated ozone-damaging CFCs to protect the ozone layer, shrinking the ozone hole over Antarctica with recovery expected within fifty years. But the unanticipated growth of aluminum oxides may push pause on the ozone success story in decades to come. Of the 8,100 objects in low Earth orbit, 6,000 are Starlink satellites launched in the last few years. Demand for global internet coverage is driving a rapid ramp up of launches of small communication satellite swarms. SpaceX is the frontrunner in this enterprise, with permission to launch another 12,000 Starlink satellites and as many as 42,000 planned. Amazon and other companies around the globe are also planning constellations ranging from 3,000 to 13,000 satellites, the authors of the study said. Internet satellites in low Earth orbit are short-lived, at about five years. Companies must then launch replacement satellites to maintain internet service, continuing a cycle of planned obsolescence and unplanned pollution.

Aluminum oxides spark chemical reactions that destroy stratospheric ozone, which protects Earth from harmful UV radiation. The oxides don't react chemically with ozone molecules, instead triggering destructive reactions between ozone and chlorine that deplete the ozone layer. Because aluminum oxides are not consumed by these chemical reactions, they can continue to destroy molecule after molecule of ozone for decades as they drift down through the stratosphere. Yet little attention has yet been paid to pollutants formed when satellites fall into the upper atmosphere and burn. Earlier studies of satellite pollution largely focused on the consequences of propelling a launch vehicle into space, such as the release of rocket fuel. The new study, by a research team from the University of Southern California Viterbi School of Engineering, is the first realistic estimate of the extent of this long-lived pollution in the upper atmosphere, the authors said. [...]

In 2022, reentering satellites increased aluminum in the atmosphere by 29.5% over natural levels, the researchers found. The modeling showed that a typical 250-kilogram (550-pound) satellite with 30% of its mass being aluminum will generate about 30 kilograms (66 pounds) of aluminum oxide nanoparticles (1-100 nanometers in size) during its reentry plunge. Most of these particles are created in the mesosphere, 50-85 kilometers (30-50 miles) above Earth's surface. The team then calculated that based on particle size, it would take up to 30 years for the aluminum oxides to drift down to stratospheric altitudes, where 90% of Earth's ozone is located. The researchers estimated that by the time the currently planned satellite constellations are complete, every year, 912 metric tons of aluminum (1,005 U.S. tons) will fall to Earth. That will release around 360 metric tons (397 U.S. tons) of aluminum oxides per year to the atmosphere, an increase of 646% over natural levels. The study is published in the journal Geophysical Research Letters.

An anonymous reader quotes a report from The Guardian: Kilifi County's white sandy beaches have made it one of Kenya's most popular tourist destinations. Hotels and beach bars line the 165 mile-long (265km) coast; fishers supply the district's restaurants with fresh seafood; and visitors spend their days boating, snorkelling around coral reefs or bird watching in dense mangrove forests. Soon, this idyllic coastline will host Kenya's first nuclear plant, as the country, like its east African neighbour Uganda, pushes forward with atomic energy plans. The proposals have sparked fierce opposition in Kilifi. In a building by Mida Creek, a swampy bayou known for its birdlife and mangrove forests, more than a dozen conservation and rights groups meet regularly to discuss the proposed plant.

"Kana nuclear!" Phyllis Omido, an award-winning environmentalist who is leading the protests, tells one such meeting. The Swahili slogan means "reject nuclear", and encompasses the acronym for the Kenya Anti-Nuclear Alliance who say the plant will deepen Kenya's debt and are calling for broader public awareness of the cost. Construction on the power station is expected to start in 2027, with it due to be operational in 2034. "It is the worst economic decision we could make for our country," says Omido, who began her campaign last year. A lawsuit filed in the environmental court by lawyers Collins Sang and Cecilia Ndeti in July 2023 on behalf of Kilifi residents, seeks to stop the plant, arguing that the process has been "rushed" and was "illegal", and that public participation meetings were "clandestine". They argue the Nuclear Power and Energy Agency (Nupea) should not proceed with fixing any site for the plant before laws and adequate safeguards are in place. Nupea said construction would not begin for years, that laws were under discussion and that adequate public participation was being carried out. Hearings are continuing to take place.

In November, people in Kilifi filed a petition with parliament calling for an inquiry. The petition, sponsored by the Centre for Justice Governance and Environmental Action (CJGEA), a non-profit founded by Omido in 2009, also claimed that locals had limited information on the proposed plant and the criteria for selecting preferred sites. It raised concerns over the risks to health, the environment and tourism in the event of a nuclear spill, saying the country was undertaking a "high-risk venture" without proper legal and disaster response measures in place. The petition also flagged concerns over security and the handling of radioactive waste in a nation prone to floods and drought. The senate suspended (PDF) the inquiry until the lawsuit was heard. "If we really have to invest in nuclear, why can't [the government] put it in a place that does not cause so much risk to our ecological assets?" says Omido. "Why don't they choose an area that would not mean that if there was a nuclear leak we would lose so much as a country?" Peter Musila, a marine scientist who monitors the impacts of global heating on coral reefs, fears that a nuclear power station will threaten aquatic life. The coral cover in Watamu marine national reserve, a protected area near Kilifi's coast, has improved over the last decade and Musila fears progress could be reversed by thermal pollution from the plant, whose cooling system would suck large amounts of water from the ocean and return it a few degrees warmer, potentially killing fish and the micro-organisms such as plankton, which are essential for a thriving aquatic ecosystem. "It's terrifying," says Musila, who works with the conservation organisation A Rocha Kenya. "It could wreak havoc." Nupea, for its part, "published an impact assessment report last year that recommended policies be put in place to ensure environmental protections, including detailed plans for the handling of radioactive waste; measures to mitigate environmental harm, such as setting up a nuclear unit in the national environment management authority; and emergency response teams," notes the Guardian. "It also proposed social and economic protections for affected communities, including clear guidelines on compensation for those who lose their livelihoods, or are displaced from their land, when the plant is set up."

"Nupea said a power station could create thousands of jobs for Kenyans and said it had partnered with Kilifi universities to start nuclear training programs that would enable more residents to take up jobs at the plant. Wilfred Baya, assistant director for energy for Kilifi county, says the plant could also bring infrastructural development and greater electricity access to a region which suffers frequent power cuts."

Slashdot reader hackertourist shared this announcement from NASA's Jet Propulsion Laboratory: Edward C. Stone, former director of NASA's Jet Propulsion Laboratory and project scientist of the Voyager mission for 50 years, died on June 9, 2024. He was age 88...

Stone served on nine NASA missions as either principal investigator or a science instrument lead, and on five others as a co-investigator (a key science instrument team member). These roles primarily involved studying energetic ions from the Sun and cosmic rays from the galaxy. He had the distinction of being one of the few scientists involved with both the mission that has come closest to the Sun (NASA's Parker Solar Probe) and the one that has traveled farthest from it (Voyager).

Stone is best known for his work on NASA's longest-running mission, Voyager, whose twin spacecraft launched in 1977 and are still exploring deep space today. He served as Voyager's sole project scientist from 1972 until his retirement in 2022. Under Stone's leadership, the mission took advantage of a celestial alignment that occurs just once every 176 years to visit Jupiter, Saturn, Uranus, and Neptune. During their journeys, the spacecraft revealed the first active volcanoes beyond Earth, on Jupiter's moon Io, and an atmosphere rich with organic molecules on Saturn's moon Titan. Voyager 2 remains the only spacecraft to fly by Uranus and Neptune, revealing Uranus' unusual tipped magnetic poles, and the icy geysers erupting from Neptune's moon Triton.
The mission "transformed our understanding of the solar system, and is still providing useful data today," writes hackertourist. (Watch Stone speak in this 2018 video about the Voyager 2 spacecraft.) NASA's announcement also includes stories of Stone's desire to engage the public and his thoughtfulness in considering the true boundary of interstellar space. As director of JPL, Stone was responsible for more than two dozen other missions, including landing NASA's Pathfinder mission with the first Mars rover in 1996. "Ed Stone was a trailblazer who dared mighty things in space. He was a dear friend to all who knew him, and a cherished mentor to me personally," said Nicola Fox, associate administrator for the Science Mission Directorate at NASA Headquarters in Washington.

"Ed took humanity on a planetary tour of our solar system and beyond, sending NASA where no spacecraft had gone before. His legacy has left a tremendous and profound impact on NASA, the scientific community, and the world."

It's one of Saturn's 146 moons — just 310 miles in diameter (or 498 kilometers). Yet the European Space Agency plans to send a robot on a one-billion mile trip to visit it. Why?

Because astronomers have discovered Enceladus "possesses geysers that regularly erupt from its surface and spray water into space," reports the Guardian: Even more astonishing, these plumes contain complex organic compounds, including propane and ethane. "Enceladus has three key ingredients that are considered to be essential for the appearance of life," said astronomer Professor Michele Dougherty of Imperial College London. "It has got liquid water, organic material and a source of heat. That combination makes it my favourite moon in the whole solar system."
A panel of expert scientists have now recommended the Saturn moon for an ESA mission by 2040, according to the article, "with the aim of either landing on the moon or flying through the geysers spraying water and carbon chemicals from its surface into space. Preferably, both goals would be attempted, the panel added."

It will be tricky. Dougherty warns that Enceladus "is small with weak gravity, which means you will need a lot of fuel to slow it down so that it does not whiz past its target into deep space. That is going to be a tricky issue for those designing the mission." But Dougherty has a special interest, as the principal investigator for the magnetometer flown on the Cassini mission that studied Saturn and its moons between 2004 and 2017. "At one point, Cassini passed close to Enceladus and our instrument indicated Saturn's magnetic field was being dragged round the moon in a way that suggested the little moon had an atmosphere," said Dougherty. Cassini's managers agreed to direct the probe to take a closer look and, in July 2005, the spaceship swept over the moon's surface at a height of 173km — and detected significant amounts of water vapour. "It was wonderful," recalls Dougherty.

Subsequent sweeps produced even greater wonders. Huge geysers of water were pictured erupting from geological fault lines at the south pole. The only other body in the solar system, apart from Earth, possessing liquid water on its surface had been revealed. Finally came the discovery of organics in those plumes and Enceladus went from being rated a minor, unimportant moon to a world that is now set to trigger the expenditure of billions of euros and decades of effort by European astronomers and space engineers.
Thanks to long-time Slashdot reader thephydes for sharing the article.

Have scientists discovered infrared radiation, evidence of waste heat generated by the energy-harvesting star-surrounding spheres first proposed by British American physicist Freeman Dyson? CNN reports: [A] new study that looked at 5 million stars in the Milky Way galaxy suggests that seven candidates could potentially be hosting Dyson spheres — a finding that's attracting scrutiny and alternate theories... Using historical data from telescopes that pick up infrared signatures, the research team looked at stars located within less than 1,000 light-years from Earth: "We started with a sample of 5 million stars, and we applied filters to try to get rid of as much data contamination as possible," said lead study author Matías Suazo, a doctoral student in the department of physics and astronomy of Uppsala University in Sweden. "So far, we have seven sources that we know are glowing in the infrared but we don't know why, so they stand out...."

Among the natural causes that could explain the infrared glow are an unlucky alignment in the observation, with a galaxy in the background overlapping with the star, planetary collisions creating debris, or the fact that the stars may be young and therefore still surrounded by disks of hot debris from which planets would later form...

An earlier study, published in March and using data from the same sources as the new report, had also found infrared anomalies among a sample dataset of 5 million stars in our galaxy. "We got 53 candidates for anomalies that cannot be well explained, but can't say that all of them are Dyson sphere candidates, because that's not what we are specifically looking for," said Gabriella Contardo, a postdoctoral research fellow at the International School for Advanced Studies in Trieste, Italy, who led the earlier study. She added that she plans to check the candidates against Suazo's model to see how many tie into it. "You need to eliminate all other hypotheses and explanations before saying that they could be a Dyson sphere," she added. "To do so you need to also rule out that it's not some kind of debris disk, or some kind of planetary collision, and that also pushes the science forward in other fields of astronomy — so it's a win-win."

Both Contardo and Suazo agree that more research is needed on the data, and that ultimately they could turn to NASA's James Webb Space Telescope for more information, as it is powerful enough to observe the candidate stars directly. However, because of the lengthy, competitive procedures that regulate use of the telescope, securing access might take some time.

CNN adds that "A May 23 paper published in response to the one by Suazo and his colleagues suggests that at least three of the seven stars have been 'misidentified' as Dyson spheres and could instead be 'hot DOGs' — hot dust-obscured galaxies — and that the remaining four could probably be explained this way as well."

But "As for Dyson himself, if he were still alive, he also would be highly skeptical that these observations represent a technological signature, his son George argued: 'But the discovery of new, non-technological astronomical phenomena is exactly why he thought we should go out and look.' "

wgoodman shares a report from The Register: NASA's Voyager 1 spacecraft is back in action and conducting normal science operations for the first time since the veteran probe began spouting gibberish at the end of 2023. All four of the spacecraft's remaining operational instruments are now returning usable data to Earth, according to NASA. Some additional work is needed to tidy up the effects of the issue. Engineers need to resynchronize the timekeeping software of Voyager 1's three onboard computers to ensure that commands are executed at the correct times. Maintenance will also be performed on the digital tape recorder, which records some data from the plasma instrument for a six-monthly downlink to Earth.

Voyager 1's woes began in November 2023, when the spacecraft stopped transmitting usable data back to Earth. Rather than engineering and science data, NASA found itself faced with a repeating pattern of ones and zeroes, as though the spacecraft was somehow stalled. Engineers reckoned the issue lay with the Flight Data System (FDS) and in March sent a command -- dubbed a "poke" -- to get the FDS to try some other software sequences and thus circumvent whatever was causing the problem. The result was a complete memory dump from the computer, which allowed engineers to pinpoint where the corruption had occurred. It appeared that a single chip was malfunctioning, and engineers were faced with the challenge of devising a software update that would work around the defective hardware.

Usable engineering data began to be returned later in April, and in May the mission team sent commands to instruct the probe to keep science data flowing. The result was that the plasma wave subsystem and magnetometer instrument began sending data immediately. According to NASA, the cosmic ray subsystem and low energy charged particle instrument required a little more tweaking but are now operational. The rescue was made all the more impressive by the fact that it takes 22.5 hours for a command to reach Voyager 1 and another 22.5 hours for a response to be received on Earth.

Paul M. Nakasone, a retired U.S. Army general and former NSA director, is now OpenAI's newest board member. Nakasone will join the Safety and Security Committee and contribute to OpenAI's cybersecurity efforts. CNBC reports: The committee is spending 90 days evaluating the company's processes and safeguards before making recommendations to the board and, eventually, updating the public, OpenAI said. Nakasone joins current board members Adam D'Angelo, Larry Summers, Bret Taylor and Sam Altman, as well as some new board members the company announced in March: Dr. Sue Desmond-Hellmann, former CEO of the Bill and Melinda Gates Foundation; Nicole Seligman, former executive vice president and global general counsel of Sony; and Fidji Simo, CEO and chair of Instacart.

OpenAI on Monday announced the hiring of two top executives as well as a partnership with Apple that includes a ChatGPT-Siri integration. The company said Sarah Friar, previously CEO of Nextdoor and finance chief at Square, is joining as chief financial officer. Friar will "lead a finance team that supports our mission by providing continued investment in our core research capabilities, and ensuring that we can scale to meet the needs of our growing customer base and the complex and global environment in which we are operating," OpenAI wrote in a blog post. OpenAI also hired Kevin Weil, an ex-president at Planet Labs, as its new chief product officer. Weil was previously a senior vice president at Twitter and a vice president at Facebook and Instagram. Weil's product team will focus on "applying our research to products and services that benefit consumers, developers, and businesses," the company wrote. Edward Snowden, a former NSA contractor who leaked classified documents in 2013 that exposed the massive scope of government surveillance programs, is wary of the appointment. In a post on X, Snowden wrote: "They've gone full mask-off: Do not ever trust OpenAI or its products (ChatGPT etc). There is only one reason for appointing an NSA director to your board. This is a willful, calculated betrayal of the rights of every person on Earth. You have been warned."

The iconic recycling symbol, invented 20 years before Earth Day 1990, has become omnipresent on products, often misleading consumers about what can be recycled, according to experts cited in a story explored by Grist. The chasing arrows logo, which promises rebirth for discarded materials, is frequently plastered on items that are not recyclable, particularly plastic products. Confusion over recycling rules has led to contamination at recycling facilities, driving up costs for cities. Only around 5 percent of plastic waste in the United States gets recycled, with much of the rest ending up in landfills or incinerators.

Environmental groups have called plastic recycling a "false solution." The trouble began in the 1970s when corporations, facing pressure to address litter, embraced recycling as a way to shift responsibility for waste onto individuals and local governments. The plastics industry introduced a resin code system in 1988, surrounding numbers with the chasing arrows logo, giving the impression that all plastics could be recycled. Despite industry efforts to promote recycling, experts say fulfilling the "urgent need to recycle" has proven difficult and unprofitable. The result is a lack of markets for most recycled plastics, with only 9 percent of all plastics ever produced having been recycled.

The sun fired off a volley of radiation-riddled outbursts in May. When they slammed into Earth's magnetic bubble, the world was treated to iridescent displays of the northern and southern lights. But our planet wasn't the only one in the solar firing line. From a report: A few days after Earth's light show, another series of eruptions screamed out of the sun. This time, on May 20, Mars was blitzed by a beast of a storm. Observed from Mars, "this was the strongest solar energetic particle event we've seen to date," said Shannon Curry, the principal investigator of NASA's Mars Atmosphere and Volatile Evolution orbiter, or MAVEN, at the University of Colorado, Boulder.

When the barrage arrived, it set off an aurora that enveloped Mars from pole to pole in a shimmering glow. If they were standing on the Martian surface, "astronauts could see these auroras," Dr. Curry said. Based on scientific knowledge of atmospheric chemistry, she and other scientists say, observers on Mars would have seen a jade-green light show, although no color cameras picked it up on the surface. But it's very fortunate that no astronauts were there. Mars's thin atmosphere and the absence of a global magnetic shield meant that its surface, as registered by NASA's Curiosity rover, was showered by a radiation dose equivalent to 30 chest X-rays -- not a lethal dose, but certainly not pleasant to the human constitution.

Rare Earths Norway has discovered Europe's largest proven deposit of rare earth elements in the Fen Carbonatite Complex, positioning Norway as a key player in Europe's effort to reduce reliance on China's rare earths supply. CNBC reports: Rare Earths Norway said in a June 6 statement that its Fen Carbonatite Complex in the southeast of the country boasts 8.8 million metric tons of total rare earth oxides (TREOs) with a reasonable prospect for economic extraction. Within the TREOs, which are considered vital to the global shift away from fossil fuels, the company says there is an estimated 1.5 million metric tons of magnet-related rare earths which can be used in electric vehicles and wind turbines. The discovery eclipses a massive rare earths deposit found last year in neighboring Sweden.

One of the aims of the Critical Raw Materials Act is to extract at least 10% of the European Union's annual demand for rare earths by 2030 and Rare Earths Norway says it hopes to contribute to that goal. Rare Earths Norway said the rare earths deposit in Telemark, roughly 210 kilometers (130 miles) southwest of Oslo, is likely to underscore Norway's position as an integral part of Europe's rare earth and critical raw material value chain.

schwit1 shares a report: Bill Gates and his energy company are starting construction at their Wyoming site for a next-generation nuclear power plant he believes will "revolutionize" how power is generated. Gates was in the tiny community of Kemmerer Monday to break ground on the project. The co-founder of Microsoft is chairman of TerraPower. The company applied to the Nuclear Regulatory Commission in March for a construction permit for an advanced nuclear reactor that uses sodium, not water, for cooling. If approved, it would operate as a commercial nuclear power plant.

The site is adjacent to PacifiCorp's Naughton Power Plant, which will stop burning coal in 2026 and natural gas a decade later, the utility said. Nuclear reactors operate without emitting planet-warming greenhouse gases. PacifiCorp plans to get carbon-free power from the reactor and says it is weighing how much nuclear to include in its long-range planning. The work begun Monday is aimed at having the site ready so TerraPower can build the reactor as quickly as possible if its permit is approved. Russia is at the forefront for developing sodium-cooled reactors.

The dream of perpetual, emissionless flight is getting closer to reality. Aviation giants, telecoms, investors, and military agencies are pouring millions into developing these prototypes, which could revolutionize aerial surveillance, emergency communications, and more.

Solar planes absorb energy via panels covering their wings and bodies, allowing them to fly indefinitely as long as the sun shines. Advances in battery technology now enable longer flights and overnight operation, albeit with less power than jet fuel. These slow, lightweight aircraft can fly at altitudes and durations impossible for humans, making them ideal for monitoring, telecom, and disaster response. Companies like BAE Systems, Airbus, and Skydweller are racing to commercialize solar planes, with hopes of offering services by 2026-2027. The unregulated stratosphere is a key focus, with planes acting as "steerable satellites." WSJ adds: Most of the companies trying to commercialize solar planes are building aircraft that are lightweight, autonomous and can fly at altitudes and for lengths of time that humans can't tolerate. Unlike balloons, solar planes are steerable, a big advantage for monitoring a target on the ground or providing telecom coverage without being blown off course. They are also cheaper and closer to Earth than satellites, putting them in a sweet spot for services that can't currently be offered by either, executives in charge of solar-aircraft projects say. The planes can capture higher resolution photos or video than satellites, or deliver broadband internet from the air, another thing satellites can't do.

"Virgin Galactic launched six people to suborbital space on Saturday, launching a Turkish astronaut and three space tourists," reports Space.com, "on what was the final voyage of the VSS Unity space plane." Unity, attached to the belly of its carrier plane Eve, took off from runway at Spaceport America in New Mexico at 10:31 a.m. EDT (1431 GMT) and carried to an altitude of 44,562 feet (13,582 meters) over the next hour, where it was dropped and ignited its rocket engine to carry two pilots and four passengers to space and back. The mission, called Galactic 07, reached an altitude of 54.4 miles (87.5 km) and marked the seventh commercial spaceflight by Virgin Galactic on Unity, which is being retired to make way for the company's new "Delta" class of spacecraft rolling out in 2026.

"I will need much more time to try and process what just happened," Tuva Atasever, the Turkish Space Agency astronaut on the flight, said in a post-flight press conference, adding that the view of Earth was indescribable. "It's not something you can describe with adjectives. It's an experiential thing ... you just feel it in your gut."
One of the space tourists was a principal propulsion engineer at SpaceX, who wore the flags of the U.S. and India on his spacesuit to honor both his home country and that of his parents. The other two were a New York-based real estate developer and a London-based hotel and resort investment strategy advisor.

The flight landed 70 minutes later at 11:41 a.m. EDT (1541 GMT), according to the article, "marking only its seventh commercial spaceflight for Virgin Galactic and 12th crewed spaceflight overall." In all, Virgin Galactic flew the space plane just 32 times, including non-space test flights... "This vehicle was revolutionary," Virgin Galactic president Mike Moses said in the post-launch press conference. "We tested it, we flew it, we demonstrated and prove to the world that commercial human spaceflight is possible with private funding for private companies... Seven commercial space flights, a single vehicle flying six times in six months last year, that's groundbreaking," Moses said. "The fact that we can take this vehicle back to back to back on a monthly basis is is really revolutionary."

The new Delta class of spacecraft will be able to fly at least twice a week, about eight times the rate of SpaceShipTwo, with Virgin Galactic planning to build at least two to start its new fleet. "We're going to field in 2026 two spaceships, our mothership Eve, that's 750 astronauts a year going to space," Moses said of the new fleet's flight capacity. "That's more than have gotten to space in the 60 year history of spaceflight to date...."

Since 2018, Virgin Galactic has flown payloads as part of NASA's Flight Opportunities program and most recently was selected to be a contracted flight provider for NASA for the next five years.
Phys.org reports that with the Delta-class rockets, "The future of the company is at stake as it seeks at long last to get into the black. Virgin is burning through cash, losing more than $100 million in each of the past two quarters, with its reserves standing at $867 million at the end of March." It also laid off 185 people, or 18 percent of its workforce, late last year. Its shares are currently trading at 85 cents, down from $55 in 2021, the year Branson himself flew, garnering global headlines.
Saturday's flight also became "a suborbital science lab" for microgravity research, according to a statement from the company. Phys.org reports that during the flight, astronaut Atasever "wore custom headgear with brain activity monitoring sensors to collect physiological data, a dosimeter, and two commercially available insulin pens to examine the ability to administer accurate insulin doses in microgravity, Virgin said in a statement." And Virgin Galactic said their flight also carried "rack-mounted" autonomous payloads from both Purdue ("to study propellant slosh in fuel tanks of maneuvering spacecraf") and U.C. Berkeley ("testing a new type of 3D printing"), as well as "multiple human-tended experiments." "Discovery and innovation are central to our mission at Virgin Galactic," said Michael Colglazier, CEO of Virgin Galactic. "We're excited to build on our successful record of facilitating scientific experiments in suborbital space, and we look forward to continuing to expand our role in suborbital research going forward."

"The first European Space Agency instrument to land on the Moon has detected the presence of negative ions on the lunar surface produced through interactions with the solar wind," according to a statement from the agency, collecting over three hours of data, "three times more than what the science teams needed for mission success..." The solar wind is a constant flow of radiation and particles from the Sun. Earth's magnetic field acts as a shield. In contrast, the Moon has no magnetic field and a very tenuous atmosphere, called the exosphere. When the solar wind hits the Moon,âthe surface reacts, kicking up secondary particles... While the positively charged particles have been measured from orbit before, measuring negative particles was a challenge. Negative ions are short-lived and cannot make it to orbit.
The instrument was dropped off by China's Chang'e-6 lunar lander, and Europe's ground stations are also providing support for that mission. Futurism reports: Within just over 48 hours, China's Chang'e-6 lunar touched down on the far side of the Moon, successfully scooped up samples, and kicked off once again. It was an extraordinary feat, representing the first-ever samples ever collected from the side of the Moon that permanently faces away from us. During its brief visit, the lander also dropped off several scientific payloads on the lunar service, including the European Space Agency's Negative Ions at the Lunar Surface instrument.
The lander also unfurled China's red and gold flag for the first time on the far side of the moon, according to the Associated Press. And then... Its ascender lifted off Tuesday morning at 7:38 a.m. Beijing time, with its engine burning for about six minutes as it entered a preset orbit around the moon, the China National Space Administration said. The agency said the spacecraft withstood a high temperature test on the lunar surface, and acquired the samples using both drilling and surface collection before stowing them in a container inside the ascender of the probe as planned. The container will be transferred to a reentry capsule that is due to return to Earth in the deserts of China's Inner Mongolia region about June 25.
The samples "could help researchers figure out why the moon's two sides are so starkly different," writes Science News: Spacecraft observations of the farside show very little volcanic activity. Some scientists suspect that this is because the nearside crust is much thinner, which would have allowed more magma to come up from below the surface, says Kerri Donaldson Hanna, a planetary geologist at the University of Central Florida in Orlando.

There is evidence that some volcanism occurred in the South Pole-Aitken basin and in Apollo crater, though it appears this activity happened roughly 3.5 billion years ago. It's possible the impact that created both Aiken and Apollo weakened the lunar crust, forming fractures and allowing magma to flow. The samples onboard Chang'e-6 could contain clues as to whether or not this happened.

Both Chinese and international researchers will be able to study the material. Donaldson Hanna is looking forward to seeing what insights will be gleaned from Chang'e-6 as well as future landers, such as those in NASA's Commercial Lunar Payload Services program.
Thanks to Slashdot reader cusco for sharing the news.

Carbon dioxide levels in Earth's atmosphere are accumulating "faster than ever" and have reached unprecedented levels, with a peak of 426.9 ppm recorded at NOAA's Mauna Loa Observatory in May 2024, said scientists from NOAA, the Scripps Institution of Oceanography and the University of California San Diego. CBS News reports: "Over the past year, we've experienced the hottest year on record, the hottest ocean temperatures on record, and a seemingly endless string of heat waves, droughts, floods, wildfires and storms," NOAA Administrator Rick Spinrad said in a press release. "Now we are finding that atmospheric CO2 levels are increasing faster than ever." The researchers measured carbon dioxide, or CO2, levels at the Mauna Loa Atmospheric Baseline Observatory. They found that atmospheric levels of the gas hit a seasonal peak of just under 427 parts per million in May -- an increase of 2.9 ppm since May 2023 and the fifth-largest annual growth in 50 years of data recording.

It also made official that the past two years saw the largest jump in the May peak -- when CO2 levels are at their highest in the Northern Hemisphere. John Miller, a NOAA carbon cycle scientist, said that the jump likely stems from the continuous rampant burning of fossil fuels as well as El Nino conditions making the planet's ability to absorb CO2 more difficult. The surge of carbon dioxide levels at the measuring station surpassed even the global average set last year, which was a record high of 419.3 ppm -- 50% higher than it was before the Industrial Revolution. However, NOAA noted that their observations were taken at the observatory specifically, and do not "capture the changes of CO2 across the globe," although global measurements have proven consistent without those at Mauna Loa. "Not only is CO2 now at the highest level in millions of years, it is also rising faster than ever," Ralph Keeling, director of Scripps' CO2 program, said in the release. "Each year achieves a higher maximum due to fossil-fuel burning, which releases pollution in the form of carbon dioxide into the atmosphere. Fossil fuel pollution just keeps building up, much like trash in a landfill."

"We are living in unprecedented times. ... This string of hottest months will be remembered as comparatively cold," Carlo Buontempo, director of Copernicus, added.