RightsCon, one of the world's largest digital human rights conferences, was suddenly postponed by Zambia's government just days before it was scheduled to begin in Lusaka. Officials cited unresolved speaker clearances and "thematic issues," while Access Now said it had not yet received formal communication and was seeking an urgent meeting with the government. 404 Media reports: Minister of Technology and Science Felix Mutati first announced the postponement on April 28, saying that Zambia needed more time to ensure the conference "fully [aligns] with national procedures, diplomatic protocols, and the broader objective of fostering a balanced and consensus-driven platform for dialogue." "In particular, certain invited speakers and participants remain subject to pending administrative and security clearances, which have not yet been concluded," he added, according to the Lusaka Times.

[...] On a popular listserv for academics, many of whom are attending RightsCon, a board member of Access Now wrote "I am told I can leak that RightsCon has been canceled. Message from [Access Now] following shortly" in a thread about what attendees were planning on doing. And in an email, AccessNow wrote: "It is with heavy hearts that we share: RightsCon will not proceed in Zambia or online. We understand this news is deeply upsetting for our community and while we know everyone has questions, our goal right now is to notify you of the event's status because many of you have imminent travel plans. We do not recommend registered participants travel to Lusaka for RightsCon.

Over the last 48 hours we have experienced an overwhelming surge of support from civil society, government representatives, sponsors, and our community as a whole. For this, we wholeheartedly thank you. We'll communicate more information soon."

A new poll shows a slim majority of Swiss voters now support a June 14 referendum to cap the country's population at 10 million by 2050. Under the proposal backed by the right-wing Swiss People's Party (SVP), "the permanent resident population must not exceed 10 million before 2050, and Switzerland should abandon its freedom of movement agreement with the EU," reports Reuters. From the report: Switzerland's population is now more than 9 million, with official data showing foreign nationals accounted for more than 27% by 2024. The survey, conducted on April 22 and 23 and published in newspaper Tages-Anzeiger, showed 52% of 16,176 respondents in favor of the proposal or leaning that way, while 46% took the opposite view. The rest gave no opinion. A previous poll from early March had shown 45% backing the initiative and 47% against it, the newspaper said, flagging the latest result as unusual in that Swiss referendum proposals generally lose support as the voting day comes closer. The poll had a margin of error of plus or minus 3 percentage points.

fjo3 writes: The United Arab Emirates announced Tuesday that it would exit the Organization of the Petroleum Exporting Countries (source paywalled; alternative source), or OPEC, along with the wider group of partners known as OPEC+, effective May 1, in what could be a blow to control over prices by the group, long led in practice by Saudi Arabia. The move "reflects the UAE's long-term strategic and economic vision and evolving energy profile" read an official statement carried by a UAE state news agency, as disruptions "in the Strait of Hormuz continues to affect supply dynamics."

[...] The UAE is the second Persian Gulf country to leave the group after Qatar terminated its membership in 2019. The UAE has been a member of OPEC since 1971. The latest departure leaves in place 11 core members: Algeria, Congo, Equatorial Guinea, Gabon, Iran, Iraq, Kuwait, Libya, Nigeria, Saudi Arabia and Venezuela.

Researchers say infrasound -- low-frequency vibrations from things like pipes, HVAC systems, and traffic that humans can't consciously hear -- may help explain why some old buildings feel unsettling or "haunted." Rodney Schmaltz, senior author and professor at MacEwan, says: "Consider visiting a supposedly haunted building. Your mood shifts, you feel agitated, but you can't see or hear anything unusual. In an old building, there is a good chance that infrasound is present, particularly in basements where aging pipes and ventilation systems produce low-frequency vibrations. If you were told the building was haunted, you might attribute that agitation to something supernatural. In reality, you may simply have been exposed to infrasound." ScienceBlog.com reports: Infrasound sits below roughly 20 Hz, the lower limit of what the human ear can ordinarily detect. It's generated by storms, by volcanic activity, by tectonic rumblings deep in the Earth's crust, and (this is the part that matters) by the mundane mechanical heartbeat of cities: ageing pipes, HVAC systems, traffic, industrial machinery. "Infrasound is pervasive in everyday environments, appearing near ventilation systems, traffic, and industrial machinery," says Schmaltz. Most of the time, we walk through it without a second thought. The question the team wanted to answer was whether walking through it was actually doing something to us, whether the frequency was registered somewhere below consciousness, somewhere we couldn't readily name.

The experimental setup was deliberately ordinary. Thirty-six undergraduate students filed one at a time into isolated testing rooms and sat alone with a piece of music, either a calming instrumental or a horror-themed ambient track designed to provoke discomfort. Hidden subwoofers, including a 12-inch unit positioned in an adjacent hallway and a 16-inch speaker oriented toward the ceiling in a neighboring room, pumped infrasound at approximately 18 Hz into half those spaces. The participants had no idea. That last point turned out to be rather important. When the team ran the numbers, they found that participants couldn't reliably identify whether infrasound had been present. Their guesses were, statistically speaking, no better than chance. And according to Schmaltz, participants' beliefs about whether the infrasound was on had no detectable effect on their cortisol or mood. The physiological response didn't care what the participants thought was happening. It just happened anyway.

What happened, specifically, was this: those exposed to infrasound reported higher irritability, lower interest in the music, and a tendency to rate the music as sadder, irrespective of whether it was the calming or the horror track. Cortisol levels, measured before and about 20 minutes after exposure, were also elevated. Kale Scatterty, the PhD student who led the work, notes that irritability and cortisol do tend to move together under ordinary stress, but adds that "infrasound exposure had effects on both outcomes that went beyond that natural relationship." That distinction matters more than it might seem. Previous theories about infrasound and paranormal experience have often leaned on anxiety as the explanatory mechanism, the idea that low-frequency sound triggers a kind of free-floating dread that the mind then reaches for supernatural explanations to account for. The new data don't really support that picture. Measures of anxiety didn't budge significantly. What went up was irritability and disinterest, a kind of sour, low-grade aversion rather than fear. That's perhaps a more honest description of how a lot of ghost stories actually feel in the telling: not screaming terror, but wrong atmosphere, a sense of unease that never quite crystallizes into something you can point at. The study has been published this week in Frontiers in Behavioral Neuroscience.

Public stock exchanges "appear to be warming to climate tech startups," reports TechCrunch. "Or at least some of them." This week, nuclear startup X-energy went public, raising $1 billion in an upsized share offering that appears to have delivered a windfall for its investors, including Amazon [and Google]. Retail investors apparently can't get enough, with the stock popping 25% in its first hour of trading. Also this week, geothermal startup Fervo said it filed for an initial public offering. The size of the Fervo IPO has yet to be disclosed, but private investors have valued the company at around $3 billion, according to PitchBook.

The move to go public aligns with what investors told TechCrunch at the end of last year. After years of tepid attitudes toward climate tech companies, they expected public markets to start welcoming energy-related startups. Nearly every investor that weighed in on the question said the startups with the best chances of going public specialize in either nuclear fission or enhanced geothermal. Fervo, specifically, was mentioned several times. Thank data centers for that. The AI craze has taken a trend of rising demand for electricity and made it sexy and salable.

Ancient Slashdot reader hwstar shares a report from The Conversation: For the first time ever, more than 50 nations will gather next week in Colombia to hash out how to wind down and end their dependence on coal, oil and gas. The history-making conference was planned before the Iran war. But this year's energy crisis has greatly raised the stakes. [...] Around 80% of the trapped oil was destined for the Asia-Pacific. Faced with dwindling supply, the region's governments are implementing emergency measures such as sending workers home, banning government travel, rationing fuel and cutting school hours. The problem is especially bad in the Pacific. Many island nations use diesel for power generation. In response, leaders declared a regional emergency.

[...] But the real difference from half a century ago is that fossil fuel alternatives are ready for prime time. Since the 1970s, the price of solar panels has fallen 99.9%, while the cost of wind has fallen 91% since 1984. Battery prices have fallen 99% since 1991. [...] This year's oil shock shows signs of creating an unplanned social tipping point -- a threshold for self-propelling change beyond which systems shift from one state to another. Climate scientists warn of climate tipping points which amplify feedback and accelerate warming. But social scientists also point to positive tipping points -- collective action that rapidly accelerates climate action.

[...] The routine burning of coal, oil and gas is the primary driver of the climate crisis. The world's highest court last year made clear nations have obligations to stop burning fossil fuels. But fossil fuels have barely been mentioned in 30 years of global climate negotiations, due in part to blocking efforts by big fossil fuel exporters and lobbyists. Frustrated by slow progress, a coalition of nations has bypassed global climate talks to discuss how to actually phase out fossil fuels. The first of these summits will take place next week. More than 50 nations will gather in Santa Marta, Colombia, to discuss a potential standalone treaty to manage fossil-fuel phaseout while protecting workers and financial systems.

An anonymous reader quotes a report from the Guardian: Nearly half of children in the United States are breathing dangerous levels of air pollution, according to a new report, as experts warned Donald Trump's expansive rollback of protections will make the situation worse. The 27th annual air quality report from the American Lung Association (ALA) released on Wednesday evaluates pollution across the country by grading levels of ground-level ozone -- also known as smog -- as well as year-round and short-term spikes in particle pollution, commonly referred to as soot. The report analyzed quality-assured data collected between 2022 and 2024. It found that 33.5 million children in the US -- 46% of those under 18 -- live in areas that received a failing grade for at least one measure of air pollution. The report also found that 7 million children, or 10% of all children in the US, live in communities that failed all three measures.

The report further found that communities of color are disproportionately exposed to unhealthy air. As a result, they are more likely to live with one or more chronic health conditions that make them more vulnerable to pollution, including asthma, diabetes, and heart disease. Although people of color make up 42.1% of the US population, they represent 54.2% of those living in counties with at least one failing grade, the report noted. It also found that a person of color is 2.42 times more likely than a white person to live in a community that fails all three pollution measures. Smog remains the most widespread pollutant affecting Americans' health. Between 2022 and 2024, 38% of the US population -- approximately 129.1 million people -- were exposed to ozone levels that put their health at risk. This marks the highest number recorded in the ALA's report in six years, and a 3.9 million increase from the previous year.

Several factors contributed to these unhealthy pollution levels, including extreme heat, drought and wildfires which have exposed a growing share of the population to harmful ozone, the report said. The regions most affected by high ozone levels include south-western states from California to Texas, as well as much of the midwest. This is mainly driven by smoke from Canada's 2023 wildfires crossing into the US, along with high temperatures and weather patterns that favored ozone formation in 2023 and 2024 -- particularly in southern states. More broadly, the report found that climate change is intensifying ozone pollution by boosting precursor emissions and creating atmospheric conditions such as higher temperatures and lower wind speeds that allow pollutants to build up and ozone to form. Another growing source of pollution: datacenters. The report notes how they rely on regional electricity grids where fossil fuels like methane gas and coal still account for a large portion of generation. Many datacenters also use dozens of large diesel-powered backup generators, which emit carcinogenic particulate matter.

"Children's lungs are still developing," said Will Barrett, assistant vice-president of the ALA's Nationwide Clean Air Policy. "For their body size, they're breathing more air. And also, kids play outdoors, they're more active, they're breathing in more outdoor air [...]. So, air pollution exposure in children can contribute to long-term developmental harm to their lungs, new cases of asthma, increased risks of respiratory illness and other health considerations later in life."

NASA's Curiosity rover has identified a diverse set of organic molecules on Mars, including a nitrogen-bearing compound similar in structure to DNA precursors. The finding strengthens the case that ancient organic material can survive in the Martian subsurface, though it does not prove past life because the compounds could also come from geology or meteorites. Phys.org reports: The study was led by Amy Williams, Ph.D., a professor of geological sciences at the University of Florida and a scientist on the Curiosity and Perseverance Mars rover missions. Curiosity landed on Mars in 2012 to find evidence that ancient Mars had conditions that could support microbial life billions of years ago; the Perseverance rover, which landed in 2021, was sent to look for signs of any ancient life that might have formed.

Among the 20-plus chemicals identified by the experiment, Curiosity spotted a nitrogen-bearing molecule with a structure similar to DNA precursors -- a chemical never before spotted on Mars. The rover also identified benzothiophene, a large, double-ringed, sulfurous chemical often delivered to planets by meteorites. "The same stuff that rained down on Mars from meteorites is what rained down on Earth, and it probably provided the building blocks for life as we know it on our planet," Williams said. The findings have been published in the journal Nature Communications.

NASA astronaut Reid Wiseman posted an out-of-this-world iPhone video on Sunday, showing Earth disappear behind the Moon at 8x zoom. "I could barely see the Moon through the docking hatch window but the iPhone was the perfect size to catch the view," said Wiseman, noting that this video is "uncropped, uncut with 8x zoom" and "quite comparable to the view of the human eye." The New York Times says the video marks the first time an "Earthset" has been captured on video.

"We've seen our fair share of remarkable images and videos from NASA's Artemis II mission around the Moon. Some of those were even captured on iPhone," notes 9to5Mac. "But Reid Wiseman, astronaut and commander for the Artemis II mission, just posted a new video that might take the crown for the most impressive yet."

After 49 years of space travel, Voyager 1 "is running out of power," reports NPR: The spacecraft runs on a radioisotope thermoelectric generator — a device that converts heat from decaying plutonium into electricity. It carries no solar panels, no rechargeable batteries. Just the slow, steady release of nuclear warmth, which diminishes by about 4 watts each year. After nearly five decades, that decline has become critical.

During a routine maneuver in late February, Voyager 1's power levels fell unexpectedly, bringing the probe dangerously close to triggering an automatic fault-protection shutdown — a self-preservation response that would have forced engineers into a lengthy and risky recovery process. The team needed to act first. On April 17, mission engineers sent a sequence of commands to deactivate the Low-energy Charged Particles experiment, known as the LECP, which is one of Voyager 1's remaining science instruments. The LECP has measured ions, electrons, and cosmic rays originating from both our solar system and the galaxy beyond it, helping scientists map the structure of interstellar space in a way no other instrument could...

Voyager 1 now carries two operational science instruments: one that listens for plasma waves, and one that measures magnetic fields. Engineers believe the latest shutdown could buy the mission roughly another year of breathing room. The team is also developing a more sweeping power conservation plan they informally call "the Big Bang" — a coordinated swap of several powered components all at once, trading older systems for lower-power alternatives. If testing on Voyager 2, planned for May and June 2026, goes well, the same procedure will be attempted on Voyager 1 no sooner than July. If it works, there is even a slim chance the LECP could once more continue to work.

The engineers say they hope to keep at least one instrument operating on each spacecraft into the 2030s. It would leave both still reporting from places no machine has ever gone before.111
Voyager 1 is now 15 billion miles from Earth, the article points out. (Radio signals take 23 hours to arrive...)

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

After Artemis II's astronauts returned to earth, "NASA has Artemis III in its sights," reports the Associated Press: In a mission recently added to the docket for next year, Artemis III's yet-to-be -named astronauts will practice docking their Orion capsule with a lunar lander or two in orbit around Earth. Elon Musk's SpaceX and Jeff Bezos' Blue Origin are racing to have their company's lander ready first. Musk's Starship and Bezos' Blue Moon are vying for the all-important Artemis IV moon landing in 2028. Two astronauts will aim for the south polar region, the preferred location for [NASA Administrator Jared] Isaacman's envisioned $20 billion to $30 billion moon base. Vast amounts of ice are almost certainly hidden in permanently shadowed craters there — ice that could provide water and rocket fuel.

The docking mechanism for Artemis III's close-to-home trial run is already at Florida's Kennedy Space Center. The latest model Starship is close to launching on a test flight from South Texas, and a scaled-down version of Blue Moon will attempt a lunar landing later this year.

An anonymous reader quotes a report from the Guardian: The critical Atlantic current system appears significantly more likely to collapse than previously thought after new research found that climate models predicting the biggest slowdown are the most realistic. Scientists called the new finding "very concerning" as a collapse would have catastrophic consequences for Europe, Africa and the Americas. The Atlantic meridional overturning circulation (Amoc) is a major part of the global climate system and was already known to be at its weakest for 1,600 years as a result of the climate crisis. Scientists spotted warning signs of a tipping point in 2021 and know that the Amoc has collapsed in the Earth's past.

Climate scientists use dozens of different computer models to assess the future climate. However, for the complex Amoc system, these produce widely varying results, ranging from some that indicate no further slowdown by 2100 to those suggesting a huge deceleration of about 65%, even when carbon emissions from fossil fuel burning are gradually cut to net zero. The research combined real-world ocean observations with the models to determine the most reliable, and this hugely reduced the spread of uncertainty. They found an estimated slowdown of 42% to 58% in 2100, a level almost certain to end in collapse.

The Amoc is a major part of the global climate system and brings sun-warmed tropical water to Europe and the Arctic, where it cools and sinks to form a deep return current. A collapse would shift the tropical rainfall belt on which many millions of people rely to grow their food, plunge western Europe into extreme cold winters and summer droughts, and add 50-100cm to already rising sea levels around the Atlantic. The slowdown has to do with the Arctic's rapidly rising temperatures from global warming. "Warmer water is less dense and therefore sinks into the depths more slowly," explains the Guardian. "This slowing allows more rainfall to accumulate in the salty surface waters, also making it less dense, and further slowing the sinking and forming an Amoc feedback loop."

The new research has been published in the journal Science Advances.

Amazon is buying satellite communications company Globalstar for $10.8 billion to expand its Leo satellite-internet network and compete more directly with SpaceX's Starlink. The deal also includes a partnership with Apple to support satellite connectivity for iPhones and Apple Watches, with Amazon planning voice, data, and messaging services starting in 2028. The New York Times reports: Leo was Amazon's move to enter the market for beaming high-speed internet to the ground from orbit. That is an arena dominated by Elon Musk's SpaceX, which operates the Starlink satellite-internet service. Starlink, which has thousands of satellites in orbit, already serves several million customers around the world. This month, SpaceX filed to go public in what is shaping up to be one of the largest-ever initial public offerings. Mr. Musk has valued SpaceX -- which has landed contracts with federal agencies such as NASA and the Department of Defense -- at more than $1 trillion. Other companies are racing to catch up to what Mr. Musk has built for space.

Globalstar, founded in 1991, is a Louisiana-based global telecommunications company. It operates networks of low-Earth orbiting satellites to provide internet connectivity to customers. Paul Jacobs, Globalstar's chief executive, said in a statement that together, the two companies "will advance innovations in digital connectivity."

"Breathable oxygen has been created from Moon dust," reports the Telegraph, "in a world first that paves the way for a lunar base."

Jeff Bezos's Blue Origin ""announced this week that it had developed a reactor that could successfully release oxygen from lunar soil by using an electric current." Almost half of Moon dust — the thin layer of rock that blankets the lunar surface — is oxygen, but it is bound to metals such as iron and titanium... Previous work to isolate oxygen has been lab-based, and the unwieldy equipment needed has been too difficult to send to the Moon. In contrast, Blue Origin said its small-scale reactor, named Air Pioneer, could be made flight-ready to "provide the first breath of life for a sustainable Moon base"... As well as breathable air, Blue Origin said the reactor produces other critical elements for planetary infrastructure, such as iron, aluminium and silicon for construction and electronics, as well as glass for windows and solar panel covers. The company has previously said it wants to turn the Moon, and eventually Mars, into "self-sustaining worlds where robots and humans can go beyond visiting and truly explore, grow, live, and thrive"....

Blue Origin said it would need to generate around one megawatt of power to drive the reactors — about the energy it would require to power around 400 to 1,000 homes simultaneously. It envisages that each lunar settlement would have an array of nearby solar panels, generating the power needed for one reactor.
Besides breathable air for astronauts, the oxygen could also be used in propellant for refuelling landers and fuel cells, Blue Origin points out — and "produced right where they're needed, and at much lower cost than being brought from Earth."

Thanks to Slashdot reader fjo3 for sharing the article.

NASA's Artemis II crew safely splashed down off the California coast after completing a 10-day trip around the moon and back. "This is not just an accomplishment for NASA," sad NASA Administrator Jared Isaacman. "This is an accomplishment for humanity, again, a historic mission to the moon and back." From a report: Isaacman is aboard the USS John. P Murtha Navy recovery vessel, where the astronauts will be brought once they've been retrieved from the Orion capsule, and he shared "there is a lot to celebrate right now on on a mission well accomplished for Artemis II."

Isaacman also complimented the crew as "absolutely professional astronauts, wonderful communicators and almost poets" "" as well as "ambassadors from humanity to the stars." "I can't imagine a better crew than the Artemis II crew that just completed a perfect mission right now. We are back in the business of sending astronauts to the moon and bringing them back safely.

This is just the beginning. We are going to get back into doing this with frequency, sending missions to the moon until we land on it in 2028 and start building our base." Isaacman also said it's time to start preparing for Artemis III, expected to launch in 2027. You can watch the moment of the splashdown here.

BrianFagioli writes: Artificial intelligence has now run directly on a satellite in orbit. A spacecraft about 500km above Earth captured an image of an airport and then immediately ran an onboard AI model to detect airplanes in the photo. Instead of acting like a simple camera in space that sends raw data back to Earth for later analysis, the satellite performed the computation itself while still in orbit.

The system used an NVIDIA Jetson Orin module to run the object detection model moments after the image was taken. Traditionally, Earth observation satellites capture images and transmit large datasets to ground stations where computers process them hours later. Running AI directly on the satellite could reduce that delay dramatically, allowing spacecraft to analyze events like disasters, infrastructure changes, or aircraft activity almost immediately. "This success is a glimpse into the future of what we call Planetary Intelligence at scale," said Kiruthika Devaraj, VP of Avionics & Spacecraft Technology. "By running AI at the edge on the NVIDIA Jetson platform, we can help reduce the time between 'seeing' a change on Earth and a customer 'acting' on it, while simultaneously minimizing downlink latency and cost. This shift toward integrated AI at the edge is a technological leap that can help differentiate solutions like Planet's Global Monitoring Service (GMS), providing valuable insights for our customers and enabling rapid response times when it matters most."

Artemis II has broken the Apollo 13 record for the farthest distance humans have ever traveled from Earth. NASA reports: The Artemis II crew of NASA astronauts Reid Wiseman, Victor Glover, and Christina Koch, along with CSA (Canadian Space Agency) astronaut Jeremy Hansen have set the record for the farthest distance from Earth traveled by a human mission, surpassing the Apollo 13 record of 248,655 miles set in 1970.

NASA Flight Director Brandon Lloyd, Capsule Communicator Amy Dill, and Command and Handling Data Officer Brandon Borter also marked a lighthearted milestone today by emailing the crew what is now assumed to be the longest person-to-person message ever sent in human history. After breaking the record for human spaceflight, crew also took a moment to provisionally name a couple of craters on the Moon, noting they were able to see them with their naked eye.

Just northwest of Orientale basin highlighted above is a crater they would like to name Integrity after their spacecraft and this historic mission. Just northeast of Integrity, on the near and far side boundary, and sometimes visible from Earth, the crew suggested Carroll crater in honor of Reid Wiseman's late wife, Carroll Taylor Wiseman. After this mission is complete, the crater name proposals will be formally submitted to the International Astronomical Union, the organization that governs the naming of celestial bodies and their surface features. On April 1, NASA successfully launched humanity's first crewed trip around the Moon in more than 50 years. A couple of days into the mission, attention turned to a more mundane problem when reports said the astronauts had access to "two Microsoft Outlooks" and neither was working properly. By April 4, the crew had passed 100,000 miles from Earth as they continued deeper into space, and by April 6, they had entered the Moon's gravitational pull and caught their first views of the lunar far side.

NASA's Artemis astronauts are now entering "the lunar sphere of influence," reports NBC News, "meaning the pull of the moon's gravity will become stronger than Earth's." Now as they begin their swing around the moon, the Artemis astronauts "are chasing after Apollo 13's maximum range from Earth," reports the Associated Press, hoping to beat its distance from Earth by more than 4,100 miles (6,600 kilometers).

They'll begin their six-hour lunar flyby 14 hours from now (at 2:45 p.m. ET Monday). But in a space-to-earth interview Saturday with NBC News, the astronauts were already describing their first glimpses of the edge of the far side: [NASA astronaut Christina Koch realized] it looked different from what she was accustomed to on Earth. "The darker parts just aren't quite in the right place," she said. "And something about you senses that is not the moon that I'm used to seeing...."

[Astronaut Reid] Wiseman called the flight a "magnificent accomplishment" and said the astronauts' ability to gaze at both Earth and the moon from their spacecraft has been "truly awe-inspiring." "The Earth is almost in full eclipse. The moon is almost in full daylight, and the only way you could get that view is to be halfway between the two entities," he said... And while the early photos of Earth and the moon that [Canadian astronaut Jeremy] Hansen and his colleagues have beamed back have been spectacular, the Canadian astronaut said they pale in comparison to the real deal outside their capsule's windows. "I know those photos are amazing," he said, "but let me assure you, it is another level of amazing up here."
And their upcoming six-hour lunar flyby "promises views of the moon's far side that were too dark or too difficult to see by the 24 Apollo astronauts who preceded them," notes the Associated Press: A total solar eclipse also awaits them as the moon blocks the sun, exposing snippets of shimmering corona.... At closest approach, they will come within 4,070 miles (6,550 kilometers) of the moon. Because they launched on April 1, the rendezvous won't have as much of the far lunar side illuminated as other dates would have. But the crew still will be able make out "definite chunks of the far side that have never been seen" by humans, said NASA geologist Kelsey Young, including a good portion of Orientale Basin.

They'll call down their observations as they photograph the gray, pockmarked scenes. There's a suite of professional-quality cameras on board, and each astronaut also has an iPhone for more informal, spur-of-the-minute picture-taking... Orion will be out of contact with Mission Control for nearly an hour when it's behind the moon. The same thing happened during the Apollo moonshots. NASA is relying on its Deep Space Network to communicate with the crew, but the giant antennas in California, Spain and Australia won't have a direct line of sight when Orion disappears behind the moon for approximately 40 minutes...

Once Artemis II departs the lunar neighborhood, it will take four days to return home. The capsule will aim for a splashdown in the Pacific near San Diego on April 10, nine days after its Florida launch. During the flight back, the astronauts will link up via radio with the crew of the orbiting International Space Station. This is the first time that a moon crew has colleagues in space at the same time and NASA can't pass up the opportunity for a cosmic chitchat.

The Artemis II crew has passed 100,000 miles from Earth and is now on a "free-return" path around the moon after a successful "translunar" injection burn. "Ladies and gentlemen, I am so, so excited to be able to tell you that for the first time since 1972 during Apollo 17, human beings have left Earth orbit," NASA's Dr Lori Glaze told a news conference. The Guardian reports: The astronauts -- the Americans Reid Wiseman, Victor Glover and Christina Koch, and a Canadian, Jeremy Hansen -- spent their first day in space performing checks on the spacecraft, which had never carried humans before. Later they had time to speak to US TV networks. "I've got to tell you, there is nothing normal about this," Wiseman told ABC News from the cramped interior of the capsule. "Sending four humans 250,000 miles away is a herculean effort, and we are now just realising the gravity of that."

Orion will travel about 4,000 miles (6,400km) beyond the moon before turning back, providing unprecedented and illuminated views of the lunar far side. If all proceeds smoothly, the astronauts will set a record by venturing farther from Earth than any human before -- more than 250,000 miles. The mission is part of a longer-term plan to repeatedly return to the moon, with the aim of establishing a permanent base that will offer a platform for further exploration. After the final engine burn, NASA said Wiseman took two "spectacular" images of Earth.

The first photo, called Hello, World, "shows the vast expanse of blue that is the Atlantic Ocean, framed by a thin glow of the atmosphere as the Earth eclipses the Sun and green auroras at either pole," reports the BBC. Another photo shows the view of Earth from inside the Orion spacecraft.

Reuters reports that SpaceX has confidentially filed for a U.S. IPO, reportedly targeting a valuation above $1.75 trillion. Reuters reports: SpaceX puts more rockets in space than any other company and promises a chance to invest in humanity's return to the moon and attempt to colonize Mars. The company aspires to put artificial intelligence data centers in space, while running a lucrative satellite communications system that opens up much of the earth to the internet and is increasingly used in war. [...]

A public listing at a potential valuation of more than $1.75 trillion comes after SpaceX merged with Musk's artificial intelligence startup xAI in a deal that valued the rocket company at $1 trillion and the developer of the Grok chatbot at $250 billion. SpaceX is hosting an analyst day on April 21, encouraging research analysts to attend in person, [...]. The company is also offering analysts an optional visit to xAI's "Macrohard" data center site in Memphis, Tennessee, on April 23, and plans to hold a virtual session on May 4 to discuss financial models with banks' research analysts, the source said.