Apple plans to spend $1 billion a year to produce movies that will be released in theaters, Bloomberg News reported Thursday, citing people familiar with the company's plans, part of an ambitious effort to raise its profile in Hollywood and lure subscribers to its streaming service. From the report: Apple has approached movie studios about partnering to release a few titles in theaters this year and a slate of more films in the future, said the people, who asked not to be identified because the plans are private. The list of potential releases includes Martin Scorsese's Killers of the Flower Moon, which stars Leonardo DiCaprio; the spy thriller Argylle, from director Matthew Vaughn; and Napoleon, Ridley Scott's drama about the French conqueror. The investment is a significant increase from years past. Most of Apple's previous original movies have either been exclusive to the streaming service or released in a limited number of theaters. The company has pledged to put movies in thousands of theaters for at least a month, said the people, though it hasn't finalized any plans.

Long-time Slashdot reader SpzToid quotes an intriguing new article from the Economist: Imagine a habitable colony on Mars or the Moon and the kinds of structures that come to mind are probably gleaming domes or shiny metallic tubes snaking over the surface. But with no Earth-like atmosphere or magnetic field to repel solar radiation and micrometeorites, space colonists would probably need to pile metres-thick rocks and geological rubble onto the roofs of such off-world settlements. More like a hobbit hole than Moonbase Alpha.

There could be another solution, however, that would offer future colonists safer and far more expansive living space than any cramped base built on the surface. Writing in Acta Astronautica, Raymond Martin, an engineer at Blue Origin, a rocket company, and Haym Benaroya, an aerospace engineer at Rutgers University, explore the benefits of setting up a Moon base inside giant geological tunnels that lie just below the lunar surface.

First discovered during the Apollo programme, these lunar lava tubes are a legacy of when Earth's nearest celestial neighbour was geologically hyperactive, with streams of boiling basaltic magma bursting from the interior to flow across the Moon's surface as lava. Found on Earth (see picture), and identified on Mars, lava tubes form when the sluggish top layer of a lava stream slows and cools, forming a thick and rocky lid that is left behind when the rest of the lava underneath eventually drains away.

Lava tubes on Earth are usually up to 15 metres wide and can run for several kilometres. But the reduced gravity on the Moon makes them hundreds of times bigger, creating colossal cave systems that are up to a kilometre across and hundreds of kilometres long.

The UK Space Agency said Friday it would back research by Rolls-Royce looking at the use of nuclear power on the moon. CNBC reports: In a statement, the government agency said researchers from Rolls-Royce had been working on a Micro-Reactor program "to develop technology that will provide power needed for humans to live and work on the Moon." The UKSA will now provide [around $3.52 million] of funding for the project, which it said would "deliver an initial demonstration of a UK lunar modular nuclear reactor."

Rolls-Royce is set to work with a range of organizations on the project, including the University of Sheffield's Advanced Manufacturing Research Centre and Nuclear AMRC, and the University of Oxford. "Developing space nuclear power offers a unique chance to support innovative technologies and grow our nuclear, science and space engineering skills base," Paul Bate, chief executive of the UK Space Agency, said. Bate added that Rolls-Royce's research "could lay the groundwork for powering continuous human presence on the Moon, while enhancing the wider UK space sector, creating jobs and generating further investment." According to the UKSA, Rolls-Royce [...] is aiming "to have a reactor ready to send to the Moon by 2029."

sciencehabit shares a report from Science Magazine: Choked by a smog of sulfuric acid and scorched by temperatures hot enough to melt lead, the surface of Venus is sure to be lifeless. For decades, researchers also thought the planet itself was dead, capped by a thick, stagnant lid of crust and unaltered by active rifts or volcanoes. But hints of volcanism have mounted recently, and now comes the best one yet: direct evidence for an eruption. Geologically, at least, Venus is alive.

The discovery comes from NASA's Magellan spacecraft, which orbited Venus some 30 years ago and used radar to peer through the thick clouds. Images made 8 months apart show a volcano's circular mouth, or caldera, growing dramatically in a sudden collapse. On Earth, such collapses occur when magma that had supported the caldera vents or drains away, as happened during a 2018 eruption at Hawaii's Kilauea volcano. Witnessing this unrest during the short observation period suggests either Magellan was spectacularly lucky, or, like Earth, Venus has many volcanoes spouting off regularly, says Robert Herrick, a planetary scientist at the University of Alaska, Fairbanks. Herrick, who led the study, says, "We can rule out that it's a dying planet."

The discovery, published today in Science and presented at the Lunar and Planetary Science Conference, makes Venus only the third planetary body in the Solar System with active magma volcanoes, joining Earth and Io, Jupiter's fiery moon. It means future missions to Venus will be able to study "bare, gorgeous new rock" that provides a sample of the planet's interior, Gilmore says. The discovery of more volcanoes, in old or future data, will also help scientists understand how Venus is shedding its interior heat and evolving. And it will shake scientists out of their long-standing view that a spasm of activity a half-billion years ago repaved the planet's surface -- as evidenced by a relative paucity of impact craters -- and was followed by a long period of quiet.

Samsung's Galaxy smartphones now offer "Space Zoom," writes Apple Insider, a feature augmenting 3x and 10x telephoto cameras with digital zoom "aided by Samsung's AI Super Resolution technology."

But the resulting 100X zoom levels "appear to be more a feat of AI trickery than anything else," they conclude, citing an investigation by a Reddit user: That so-called Space Zoom could potentially allow users to photograph the moon, and many do. However, it may be the case that the level of detail in the moon shots may only be higher due to software shenanigans....

The user tested the effect by downloading a high-resolution image of the moon, then downsized it to a 170 by 170-resolution image, and then applied a gaussian blur to obliterate any final details of its surface. They then showed the low-res blurry moon at full screen on their monitor, walked to the other end of their room, zoomed in on the fake celestial body, and took a photograph. After some processing, an image of the moon was produced by the smartphone, but the surface had considerably more detail for the surface than the doctored source. The user reckons Samsung "is leveraging an AI model to put craters and other details on places which were just a blurry mess."

They go further to stress that while super resolution processing uses multiple images to recover otherwise-lost detail, this seems to be something different. It is proposed that this is a case "where you have a specific AI model trained on a set of moon images, in order to recognize the moon and slap on the moon texture on it."
The Reddit user has now posted an update: I photoshopped one moon next to another (to see if one moon would get the AI treatment, while another would not), and managed to coax the AI to do exactly that.... [O]ne moon got the "AI enhancement", while the other one shows what was actually visible to the sensor — a blurry mess....

It's literally adding in detail that weren't there. It's not deconvolution, it's not sharpening, it's not super resolution, it's not "multiple frames or exposures". It's generating data.

"Based on initial data review, vehicle is healthy," Relativity Space tweeted today. "More info to follow on cause of aborts today. Thanks for playing."

Remaining back on the launchpad is the largest 3D printed object ever to exist. And they're still hoping to launch it into space.

They'd planned a launch this morning from Cape Canaveral, Florida of a 110-foot rocket (33.5 meters) on a mission they're calling GLHF — "Good Luck, Have Fun".

The rocket's makers — California-based Relativity Space — call it "the world's first 3D printed rocket." A full 85% of the rocket's weight comes from 3D printed parts, explains Wired, and "only the computing system, electronics, and readily available parts like fasteners were not." Named Terran 1, the 7.5-foot-wide rocket (2.2 meters) inaugurates the company's ambitious plans for 3D printing in space: Relativity Space wants to use Terran 1 to (comparatively) cheaply lift satellites for other companies and NASA into Earth orbit. It also plans to construct Terran R, a larger, more powerful, fully reusable rocket that the company hopes will compete with SpaceX's Falcon 9, which has a smaller payload capacity and only reuses the rocket's first stage. In late 2024, Relativity plans to test using Terran R to launch payloads to Mars; another startup, Impulse Space, will provide the lander.
From the company's web site: Like its structure, all Relativity engines are 3D printed and use liquid oxygen and liquid natural gas, which are not only the best for rocket propulsion, but also for reusability, and the easiest to eventually transition to methane on Mars.
The tagline for the company's Twitter feed says they're "Building humanity's multiplanetary future." And excitement is running high, reports Spaceflight Now" "There are a number of firsts here potentially on this rocket," said Josh Brost, vice president of revenue operations at Relativity Space....

"Hard to believe the day is nearly here to launch Terran 1, our first rocket!" Tim Ellis, co-founder and CEO of Relativity Space tweeted Tuesday....

The company now boasts some 1,000 employees, a million-square-foot headquarters and factory in Long Beach, California, and $1.3 billion in venture capital and equity fundraising, including an early $500,000 investment from billionaire Mark Cuban. In 2021, the company reached a valuation of $4.2 billion before launching any rockets....

"No new company has ever had their liquid rocket make it to space on their first attempt," Brost, also a former engineer and manager at SpaceX, told Spaceflight Now in a pre-launch interview. "So if everything goes incredibly well, and we achieve orbit on our first launch ... that would be a remarkable milestone for us, which we would be, of course, over the moon excited about. But that doesn't define success for us."
Wired adds that they're not the only company working on space-related 3D printing: Australia's Fleet Space has already been producing lightweight, 3D-printed radio frequency antennas for satellites. Next year, using printers half the size of a bus, they plan to create a satellite constellation called Alpha that will be entirely 3D-printed.... Flavia Tata Nardini, the company's CEO, believes space-based 3D printing is coming next. "In my ideal future, in 10 to 15 years, I won't have to launch satellites from here; I can build them up there."

A newly discovered asteroid roughly the size of an Olympic swimming pool has a "small chance" of colliding with Earth in 23 years, with a potential impact on Valentine's Day in 2046, according to NASA's Planetary Defense Coordination Office. From a report: The asteroid has a 1 in 625 chance of striking Earth, based on data projections from the European Space Agency, though NASA's Jet Propulsion Laboratory's Sentry system calculated the odds closer to 1 in 560. The latter tracks potential collisions with celestial objects. But the space rock -- named 2023 DW -- is the only object on NASA's risk list that ranks 1 out of 10 on the Torino Impact Hazard Scale, a metric for categorizing the projected risk of an object colliding with Earth. All other objects rank at 0 on the Torino scale.

NASA officials have warned that the odds of impact could be dramatically altered as more observations of 2023 DW are collected and additional analysis is performed. It may be a few days before new data can be collected because of the asteroid's proximity to the moon [...]. The last full moon was two days ago, and it still appears bright and large in the sky, likely obscuring 2023 DW from immediate observation.

The asteroid measures about 160 feet (about 50 meters) in diameter, according to NASA data. As 2023 DW orbits the sun, it has 10 predicted close approaches to Earth, with the nearest landing on February 14, 2046, and nine others between 2047 and 2054. The closest the asteroid is expected to travel to Earth is about 1.1 million miles (1.8 million kilometers), NASA's Eyes on Asteroids website notes. The space rock was first spotted in our skies on February 2. It's traveling about 15.5 miles per second (25 kilometers per second) at a distance of more than 11 million miles (18 million kilometers) from Earth, completing one loop around the sun every 271 days.

NASA's Orion spacecraft performed better than expected on its first deep-space flight despite experiencing unpredicted loss of its heat shield material. Space.com reports: During Tuesday's call, NASA program managers revealed that Orion's heat shield did not perform as expected, losing more material than the agency had planned for. Nevertheless, NASA leadership is confident that everything will be ready for the crewed around-the-moon flight of Artemis 2, which is planned for next year. Howard Hu, manager of NASA's Orion Program, lauded the crew module's performance during the test flight, noting that NASA was able to accomplish 161 overall test objectives planned for the mission, even adding an additional 21 during the flight based on the spacecraft's performance.

"We also accomplished what our number one objective was, which is returning the crew module back to Earth safely from 24,500 miles per hour to a landing about 16 miles per hour when it touched down, and we were able to land within 2.4 miles of our target," Hu said during Tuesday's teleconference. "Our requirement was 6.2 miles. So, really great performance as we were able to return back from the moon." "Some of the expected char material that we would expect coming back home ablated away differently than what our computer models and what our ground testing predicted," Hu said. "So we had more liberation of the charred material during reentry before we landed than we had expected."

Hu explained that NASA teams are investigating a wide range of data related to the performance of Orion's heat shield, including images and videos of reentry, onboard sensor readings, and even X-ray images of sample materials taken from the shield. "Overall, there's a lot of work to be done in this investigation going forward," Hu said. "We are just starting that effort because we've just gotten together all those pieces of information. Those samples, the videos, images, and the data from the spacecraft itself and correlated them together. And now we're assessing that data and moving forward with that assessment." Despite the heat shield issue, NASA says they feel confident that the crewed Artemis 2 mission will be able to launch on schedule in 2024.

"NASA is currently aiming to launch Artemis 2 in November 2024," adds Space.com. "The mission will send a crew of astronauts on an eight-day mission around the moon and back to test Orion's performance, crew interfaces, and guidance and navigation systems."

Silicon Valley VCs fearing a repeat of falling crypto values warn against pouring cash into hype-fuelled start-ups. From a report: Gordon Ritter, founder of San Francisco-based venture fund Emergence Capital, believes that recent developments in the field of artificial intelligence represent a significant technological advance. He just cannot see a way to make money out of them. "Everyone has stars in their eyes about what could happen," says Ritter, whose firm was an early investor in successful start ups such as Zoom. "There's a flow [of opinion that AI] will do everything. We're going against that flow." The scepticism reflects a tension among Silicon Valley VCs, who are caught between excitement over AI and a broader tech downturn that has led to falling investment in start-ups over the past year. But the recent launch of "generative AI" tools such as OpenAI's ChatGPT chatbot, capable of answering complex questions with text in natural-sounding language, has resulted in fresh excitement over the potential emergence of a new group of industry-defining companies.

[...] Many VCs express caution, put off not only by eye-watering valuations, but also the huge amount of capital AI groups require as they build "foundation models" -- machine-learning systems that require huge amounts of data and computing power to operate. One investor said that, because of the huge amount of capital and computing resources required, recent leaps in generative AI were comparable to landing on the moon: a massively impressive technical achievement, only replicable by those with nation-state level wealth. "Companies are extremely overvalued and the only justifiable investment thesis is to get in incredibly early," said another veteran investor. "Otherwise you're only buying in because of FOMO."

Unprecedented access to space is leading to all sorts of cool new ideas, including the prospect of storing data on the lunar surface. Cloud computing startup Lonestar Data Holdings announced the results of its latest funding round, taking it one step closer to this very goal. Gizmodo reports: The Florida-based company raised $5 million in seed funding to establish lunar data centers, Lonestar announced in a press release on Monday. Lonestar wants to build a series of data centers on the Moon and establish a viable platform for data storage and edge processing (i.e. the practice of processing data near the source, as a means to reduce latency and improve bandwidth) on the lunar surface. "Data is the greatest currency created by the human race," Chris Stott, founder of Lonestar, said in an April 2022 statement. "We are dependent upon it for nearly everything we do and it is too important to us as a species to store in Earth's ever more fragile biosphere. Earth's largest satellite, our Moon, represents the ideal place to safely store our future."

In December 2021, Lonestar successfully ran a test of its data center on board the International Space Station. The company is now ready to launch a small data center box to the lunar surface later this year as part of Intuitive Machines's second lunar mission, IM-2 (the company's first mission, IM-1, is expected to launch in June). Intuitive Machines is receiving funding from NASA's Commercial Lunar Payload Services program for delivering research projects to the Moon as part of the space agency's Artemis program. The lunar data centers will initially be geared towards remote data storage and disaster recovery, allowing companies to back up their data and store it on the Moon. In addition, the data centers could assist with both commercial and private ventures to the lunar environment.

The miniature data center weighs about 2 pounds (1 kilogram) and has a capacity of 16 terabytes, Stott told SpaceNews. He said the first data center will draw power and communications from the lander, but the ones that will follow (pending its success) will be standalone data centers that the company hopes to deploy on the lunar surface by 2026. The test is only supposed to last for the duration of the IM-2 mission, which is expected to be around 11-14 days, an Intuitive Machines spokesperson told SpaceNews.

With more lunar missions than ever on the horizon, the European Space Agency wants to give the moon its own time zone. The Associated Press reports: This week, the agency said space organizations around the world are considering how best to keep time on the moon. The idea came up during a meeting in the Netherlands late last year, with participants agreeing on the urgent need to establish "a common lunar reference time," said the space agency's Pietro Giordano, a navigation system engineer. "A joint international effort is now being launched towards achieving this," Giordano said in a statement.

For now, a moon mission runs on the time of the country that is operating the spacecraft. European space officials said an internationally accepted lunar time zone would make it easier for everyone, especially as more countries and even private companies aim for the moon and NASA gets set to send astronauts there. [...] The international team looking into lunar time is debating whether a single organization should set and maintain time on the moon, according to the European Space Agency.

There are also technical issues to consider. Clocks run faster on the moon than on Earth, gaining about 56 microseconds each day, the space agency said. Further complicating matters, ticking occurs differently on the lunar surface than in lunar orbit. Perhaps most importantly, lunar time will have to be practical for astronauts there, noted the space agency's Bernhard Hufenbach. "This will be quite a challenge" with each day lasting as long as 29.5 Earth days, Hufenbach said in a statement. "But having established a working time system for the moon, we can go on to do the same for other planetary destinations."

An anonymous reader shares a report: Heat pumps, in contrast, (to gas or oil furnaces) don't generate heat. They transfer it. That allows them to achieve more than 300 percent efficiency in some cases. Because they are more efficient, using heat pumps to cool and heat homes can help homeowners save money on their utility bills, said Sam Calisch, head of special projects at Rewiring America, a nonprofit advocacy group. In Maine, where heat pump adoption is growing, but where a majority of homes still burn oil, homeowners can save thousands of dollars in annual energy costs by making the switch, according to an analysis from Efficiency Maine, an independent administrator that runs the state's energy-saving programs.

Many heat pumps that are built for cold climates do have hefty upfront price tags. To soften the blow, a federal tax credit from last year's climate and tax law can cover 30 percent of the costs of purchase and installation, up to $2,000. As they've grown in popularity, heat pumps have increasingly been the subject of misconception and, at times, misinformation. Fossil-fuel industry groups have been the origin of many exaggerated and misleading claims, including the assertion that they don't work in regions with cold climates and are likely to fail in freezing weather.

While heat pumps do become less efficient in subzero temperatures, many models still operate close to normally in temperatures down to minus 13 degrees Fahrenheit, or minus 24 Celsius. Some of the latest models are even more efficient, and many "cold" countries, like Norway, Sweden and Finland, are increasingly embracing heat pumps. "We're starting to see evidence that the myth has been kept alive by people with an entrenched interest in avoiding the adoption of heat pumps," Dr. Calisch said. There are additional steps homeowners can take to make the most of their heat pumps, like sealing air leaks and drafts and improving insulation, said Troy Moon, the sustainability director for the city of Portland, Maine. Homeowners can also keep their existing furnaces as backup for the coldest days of the year, he said.

An anonymous reader shares a report: In the decade following US President John F Kennedy's 1961 announcement of America's mission to put a man on the moon, the number of physical science PhDs tripled, and that of engineering PhDs quadrupled. Now, the country is embarking on a moonshot to rebuild the semiconductor fabrication industry. Corporations that want a cut of the $39bn in manufacturing incentives within the Chips and Science Act programme can start filing their applications for subsidies on Tuesday. In order to get them, they'll have to show that they are contributing to something that may be even more difficult than putting a man in space: building a 21st-century workforce. America has plenty of four-year graduates with crushing debt (the national average for federal loan debts is more than $37,000 a student) and underwhelming job prospects. It also has plenty of college dropouts and young people with high-school degrees who are trying to make ends meet through minimum-wage jobs supplemented by gig work.

What it lacks are the machinists, carpenters, contractors and technicians who will build the new fabrication facilities. It also needs to triple the number of college graduates in semiconductor-related fields, such as engineering, over the next decade, according to commerce secretary Gina Raimondo. Raimondo, who is well on her way to becoming the industrial strategy tsar of the administration, gave a speech to this effect earlier this month. In it, she underscored not only the need to rebuild chip manufacturing in a world in which the US and China will lead separate tech ecosystems, but also to ensure that there are enough domestic workers to do so. "If you talk to the CEOs of companies like TSMC and Samsung [both of which are launching fabs in the US], they are worried about finding these people here," Raimondo told me. She cites workforce development -- alongside scale and transparency -- as major hurdles that must be overcome to meet the administration's goals.

The idea of using dirt on the Moon to manufacture solar cells, which could power a permanent human settlement, may seem outlandish, but two companies say they've made big progress on that front: they each say they've already made solar cells using fake Moon dirt. From a report: Jeff Bezos' company Blue Origin says it's been making solar cells this way since 2021 but just made that information public in a blog post on Friday. Separately, Lunar Resources, which aims to develop technologies for the "large-scale industrialization of Space," told The Verge in a call today that it's been doing the same for the last couple of years. Each company still has to make an enormous leap: from crafting solar cells out of fake dirt in Earth-bound labs to accomplishing the same thing on the harsh surface of the Moon. But this is a dream decades in the making. And if their technologies succeed, they could help make it possible to build outposts on the Moon. The idea of tapping the Moon's resources to support human settlements, called in-situ resource utilization (ISRU) in technical speak, has only recently moved out of the realm of science fiction. Now, with its Artemis program, NASA is looking to establish "the first long-term presence on the Moon."

An anonymous reader quotes a report from Ars Technica: On Friday, in a blog post not even promoted by the company's Twitter account or a news release, Blue Origin quietly said its "Blue Alchemist" program has been working on [using the dusty lunar surface to manufacture solar panels] for the last two years. The company, founded by Jeff Bezos, has made both solar cells and electricity transmission wires from simulated lunar soil -- a material that is chemically and mineralogically equivalent to lunar regolith. The engineering work is based on a process known as "molten regolith electrolysis," and Blue Origin has advanced the state of the art for solar cell manufacturing. In this process, a direct electric current is applied to the simulated regolith at a high temperature, above 1,600-degrees Celsius. Through this electrolysis process, iron, silicon, and aluminum can be extracted from the lunar regolith. Blue Origin says it has produced silicon to more than 99.999 percent purity through molten regolith electrolysis.

The key advance made by Blue Alchemist is that its engineers and scientists have taken the byproducts of this reaction -- and these materials alone -- to fabricate solar cells as well as the protective glass cover that would allow them to survive a decade or longer on the lunar surface. Blue Origin will attempt to market the technology to NASA for use by its Artemis program to return humans to the Moon in a "sustainable" way. NASA and its international partners seek to differentiate Artemis from the Apollo program by more extended stays on the Moon and building infrastructure such as power systems.

"Although our vision is technically ambitious, our technology is real now," the company said in its blog post. "Blue Origin's goal of producing solar power using only lunar resources is aligned with NASA's highest priority Moon-to-Mars infrastructure development objective." This is a notable research breakthrough, as the same electrolysis process could also be used to produce metals for building habitats and other structures, as well as oxygen. These are all important for "living off the land" if humans are to avoid the expense of needing to bring everything from Earth to live and work in space. While it is a long way from lab experiments to manufacturing on the Moon, these experiments are a critical first step.

A mini-planet orbiting in the frigid outer reaches of the solar system has a Saturn-like ring of dust and debris that defies the rules of physics, a new study has revealed. Space.com reports: The planet in question is called Quaoar and it's the seventh largest of the known dwarf planets of which Pluto is the king. Discovered in 2002 and about 697 miles wide (1,121 kilometers), Quaoar is one of the so-called trans-Neptunian objects, small planets orbiting beyond the solar system's outermost planet Neptune. Residing in the Kuiper Belt, the doughnut-shaped ring of rocky and icy debris in the outer solar system, Quaoar is a proud owner of its own moon, the 100-mile-wide (160 km) Weywot. And a recent observation campaign revealed that it also has a ring of material in its orbit. [...]

Quaoar's ring is at a very unusual distance from its parent body. In fact, before astronomers discovered Quaoar's ring in observations from several telescopes conducted between 2018 and 2021, they had thought that it was impossible for a ring to exist at such a distance. With a radius of about 2,420 miles (3,885 km) from Quaoar's center, the ring is too far away from the dwarf planet that its gravity should no longer be able to keep the material dispersed. Instead, it should coalesce under its own gravity and form another moon, just like Weywot. By not having done that, the ring has breached what astronomers call the Roche limit, the first known ring around a celestial body to have done so. [...] Now astronomers have to either rethink the Roche limit or come up with another explanation for the existence of Quaoar's ring. The study was published in the journal Nature.

In a study published Wednesday in PLOS Climate, a group of astrophysicists proposes shooting lunar dust into space to help partially shield sunlight to Earth. The Washington Post reports: The team used computer simulations to model various scenarios where massive quantities of dust (and we mean a lot of dust) in space can reduce the amount of Earthbound sunlight by 1 to 2 percent, or up to about six days of an obscured sun in a year. Their cheapest and most efficient idea is to launch dust from the moon, which would land into orbit between the sun and Earth and create a sunshade. Yes, the idea sounds like science fiction. Yes, it would require (a lot of) new engineering. Yes, there are more feasible climate mitigation tactics that can be employed now and in the near future. But the researchers view this rigorous physics experiment as a backup option that could aid -- not replace -- existing strategies to help humankind live on a more comfortable Earth. [...]

In the new study, the authors concede their idea isn't perfect but say it addresses some problems with previous concepts. For instance, the amount of material needed to actually shade the sun exceeds 10 billion kilograms (22 billion pounds), which is about 100 times more mass than humans have ever sent into space. Bromley says dust is very efficient at scattering sunlight relative to its size. The team considered different types of dust, scattering properties and size. The team found that aggregates of fluffy and highly porous particles scattered light the best, but they opted for a particle perhaps more easily accessible in space: moon dust. "We really do focus on lunar dust, just plain old, as-it-is lunar dust, without any indication of changing its shape," said Bromley, who said future moon mining could excavate the dust needed. Perhaps the greatest challenge is getting the right material exactly where you need it, Bromley said.

In one computer simulation, the team shot lunar dust from the moon's surface toward the sun. Bromley said the device to launch the lunar dust into space could be something similar to an electromagnetic gun, cannon or rocket -- picture a T-shirt cannon sending dust into orbit. In the simulation, the dust scattered along various routes until the team found suitable trajectories, which allowed the dust to concentrate temporarily and act as a sun shield. Bromley said the dust would periodically disperse away from Earth and throughout the solar system. In another simulation, the team shot off dust from a space platform about 1 million miles from Earth. This would be in an area known as L1 (Lagrange point 1), where objects tend to stay put because of equal gravitational pulls between the sun and Earth. This idea required more astronomical cost and effort because they would need a space platform and a dust supply that could be easily replenished. In either scenario, people on the ground wouldn't be able to see the shield or feel any difference, although some tools would probably be able to detect changes in the incoming solar radiation.

Bill Gates is calling for "high-voltage transmission lines that can carry electricity long distances," calling them the key to a clean-energy future: [M]any of the best places to generate lots of electricity are far away from urban centers... so to maximize clean energy's potential, we're going to need much longer lines to move that power from where it's made to where it's needed.... Beyond being old and outdated, there's another big problem making everything worse: Our grid is fragmented. Most people (including me a lot of the time) talk about the "electric grid" as if it's one single grid covering the whole nation from coast to coast, but it's actually a complicated patchwork of systems with different levels of connection to one another.

Our convoluted network prevents communities from importing energy when challenges like extreme weather shut off their power. It also prevents power from new clean energy projects from making it to people's homes. Right now, over 1,000 gigawatts worth of potential clean energy projects are waiting for approval — about the current size of the entire U.S. grid — and the primary reason for the bottleneck is the lack of transmission. Complicating things further is the fact that new infrastructure projects are typically planned and executed by hundreds of individual utility companies that aren't required to coordinate.
Gates calls for new federal funding and policies , but also faults the permitting processes at the state level as "long, convoluted, and often outdated." As a result, we don't build lines fast enough, and we're slower than other countries. Some states — like New Mexico and Colorado — are doing innovative work to speed up the process. But there is a lot more room for policymakers to work together and make the permit process easier.

Although transmission is primarily a policy problem, innovation will help too. For example, grid-enhancing technologies like dynamic line ratings, power flow controls, and topology optimization could increase the capacity of the existing system. Breakthrough Energy Ventures, which is part of the climate initiative I helped start, has invested in new technologies like advanced conductors and superconductors — wires that use cutting-edge materials to get more energy out of smaller lines. But these technologies aren't a substitute for real systemic improvements and building lines in places where they don't already exist.
"By the 2030s, we need to build so many new lines that they would reach to the moon if they were strung together," Gates says in a video accompanying the article. "And by 2050, we'll need to more than double the size of the grid, while replacing most of the existing wires." But noting today's power grid problems, Gates writes optimistically that "It doesn't have to be this way."

And he ultimately believes that modernized power grids "will lead to lower emissions, cleaner air, more jobs, fewer blackouts, more energy and economic security, and healthier communities across the country."

Satellite navigation systems for lunar settlements will require local atomic clocks. Scientists are working out what time they will keep. From a report: It's not obvious what form a universal lunar time would take. Clocks on Earth and the Moon naturally tick at different speeds, because of the differing gravitational fields of the two bodies. Official lunar time could be based on a clock system designed to synchronize with UTC, or it could be independent of Earth time. Representatives of space agencies and academic organizations worldwide met in November 2022 to start drafting recommendations on how to define lunar time at the European Space Research and Technology Centre of the European Space Agency (ESA) in Noordwijk, the Netherlands.

Decisions must be made soon, says Patrizia Tavella, who leads the time department at the International Bureau of Weights and Measures in Sevres, France. If an official lunar time is not established, space agencies and private companies will come up with their own solutions, she says. "This is why we want to raise an alert now, saying let's work together to take a common decision." The most pressing need for lunar time comes from plans to create a dedicated global satellite navigation system (GNSS) for the Moon, similar to how GPS and other satellite navigation networks enable precise location tracking on Earth.

Space agencies plan to install this lunar GNSS from around 2030. ESA approved a lunar satellite navigation project called Moonlight at its ministerial council meeting on 22 and 23 November 2022 in Paris, and NASA established a similar project, called Lunar Communications Relay and Navigation Systems, last January. Until now, Moon missions have pinpointed their locations using radio signals sent to large antennas on Earth at scheduled times. But with dozens of missions planned, "there's just not enough resources to cover everybody," says Joel Parker, an engineer who works on lunar navigation at the Goddard Center.

From Science magazine: Cave Johnson is almost ready to start a new study in his secret underground facility. The founder of the Michigan-based technology company Aperture Science, he's invented a portal gun that allows people to teleport to various locations. Now, he and his colleagues want to see whether they can make portals appear on previously unfit surfaces with a new "conversion gel" containing moon dust. "It may be toxic. We are unsure," he wrote in a recent research proposal.

To test the gel, Johnson plans to recruit orphans, homeless people, and the elderly. They'll get 60 bucks — compensation he feels is well worth the risk of their skin potentially peeling off, death due to an artificial intelligence guide becoming sentient, or worse.

None of this is real, of course — Johnson is the villain of the popular video game Portal — but the makeshift ethical review board that evaluated his study was. At a Public Responsibility in Medicine and Research conference conducted online last month, attendees of the session "Mad Science on Trial: The Real Ethical Problems With Fictional Scientists" had some serious concerns with Johnson's research. Would the participants' data be secure and anonymized? Would the team of henchmen include some henchwomen as well? And, most importantly, would there be cake?

The moderators of the session didn't just target Johnson. They asked their audience of 450 virtual attendees to evaluate other fictional mad scientists as well, voting on whether an institutional review board (IRB) — a body of experts that a research institution uses to evaluate whether proposals are ethically sound — should approve their protocols.
Another example used was the scientist in the first-person shooter game Halo who proposed surgically enhancing 6-year-old children with armor, neural interfaces, and other technology to give them combat advantages against a theoretical alien attack.

Science interviewed two of the panelists, one noting "this format is good for making the Instituational Review Board ethics world fun and doing it in a way that kind of stretches people's minds."

Thanks to Slashdot reader sciencehabit for submitting the article.