NASA has postponed its plans to send humans to the moon after delays hit its hugely ambitious Artemis programme, which aims to get spaceboots bouncing again on the lunar surface for the first time in half a century. From a report: The US space agency has announced the Artemis III mission to land four astronauts near the lunar south pole will be delayed a year until September 2026. Artemis II, a 10-day expedition to send a crew around the moon and back to test life support systems, will also be pushed back to September 2025.

NASA said the delays would allow its teams to work through development challenges associated with the programme, which partners with private companies including Elon Musk's SpaceX and Lockheed Martin and uses some largely untested spacecraft and technology. "We are returning to the moon in a way we never have before, and the safety of our astronauts is Nasa's top priority as we prepare for future Artemis missions," said the Nasa administrator Bill Nelson. Washington wants to establish a long-term human presence outside Earth's orbit, including construction of a lunar base camp as well as a space station that circles the moon. Its ultimate plans are to send people to Mars, but it has decided to return to the moon first to learn more about deep space before embarking on what would be a months-long voyage to the red planet.

necro81 writes: ULA's Vulcan rocket, many years in development, had a successful first launch this morning from Cape Canaveral. The expendable rocket, which uses two methane-fueled BE-4 engines from Blue Origin in its first stage, is the successor to the Delta and Atlas-V launch vehicles.

Years overdue, and with a packed manifest for future launches, Vulcan is critical to the ULA's continued existence. The payload on this first mission is called Peregrine -- a lunar lander from Astrobotic. Unfortunately, Peregrine has suffered an anomaly some hours into flight; it is unclear whether the mission can recover. UPDATE: According to Reuters, Peregrine's propulsion system experienced issues hours after separating from Vulcan, "preventing the spacecraft from angling itself toward the sun for power."

"While mission engineers regained control, the faulty propulsion system is losing valuable propellant, forcing Astrobotic to consider 'alternative mission profiles,' suggesting a moon landing is no longer achievable," reports Reuters.

In the most recent update (#5) on X, Astrobotic said in a statement: "We've received the first image from Peregrine in space! The camera utilized is mounted atop a payload deck and shows Multi-Layer Insulation (MLI) in the foreground. The disturbance of the MLI is the first visual clue that aligns with out telemetry data that points to a propulsion system anomaly. Nonetheless, the spacecraft's battery is now fully charged, and we are using Peregrine's existing power to perform as many payload and spacecraft operations as possible. At this time, the majority of our Peregrine mission team has been awake and working diligently for more than 24 hours. We ask for your patience as we reassess incoming data so we can provide ongoing updates later this evening."

The BBC checks in on "the pioneers of space exploration — the 24 Nasa astronauts who travelled to the Moon in the Apollo missions of the 1960s and 1970s." Ken Mattingly and Frank Borman died within a few days of each other late last year. Now only eight people who have voyaged beyond the Earth's orbit remain. Who are they, and what are their stories...? There are only four people still alive who have walked on the Moon — Charlie Duke is one of them. He did it aged 36, making him the youngest person to set foot on the lunar surface... Charlie Duke now lives outside San Antonio, Texas, with Dorothy, to whom he has been married for 60 years....

Jim Lovell is one of only three men to have travelled to the Moon twice, and following Frank Borman's death in November 2023, he became the oldest living astronaut....

After leaving Nasa in 1975, [Harrison Schmitt] was elected to the U.S. Senate from his home state of New Mexico, but only served one term. Since then he has worked as a consultant in various industries as well as continuing in academia.
And when confronted by a man claiming Apollo 11 was an elaborate lie, 72-year-old Buzz Aldrin "punched him on the jaw." Despite struggles in later life, he never lost his thirst for adventure and joined expeditions to both the North and South Poles, the latter at the age of 86. While embracing his celebrity, he has remained an advocate for the space programme, especially the need to explore Mars.

"I don't think we should just go there and come back — we did that with Apollo," he says.
Last 93-year-old Buzz Aldrin got married — and thanked his fans for remembering his birthday. "It means a lot and I hope to continue serving a greater cause for many more revolutions around the sun."

Long-time Slashdot readers necro81 writes: The popular vision of Neptune is azure blue. This comes mostly from the publicly released images from Voyager 2's flyby in 1989 — humanity's only visit to this icy giant at the edge of the solar system. But it turns out that view is a bit distorted — the result of color-enhancing choices made by NASA at the time. A new report from Oxford depicts Neptune's blue color as more muted, with a touch of green, not much different than Uranus. The truer-to-life view comes from re-analyzing the Voyager data, combined with ground-based observations going back decades. (Add'l links here, here, and here.)

This is nothing new: most publicity images released by space agencies — of planets, nebulae, or the surface of Mars — have undergone some color-enhancement for visual effect. (They'll also release "true-color" images, which try to best mimic what the human eye would see.) Many images — such as those from the infrared-seeing JWST — need wholesale coloration of their otherwise invisible wavelengths. The new report is a good reminder, though, to remember that scientific cameras are pretty much always black and white; color images come from combining filters in various ways.
Also thanks to long-time Slashdot reader Geoffrey.landis for sharing the story.

Tuesday's launch was different. "SpaceX launched its first batch of Starlink satellites designed to connect directly to unmodified smartphones..." reports SpaceNews, "after getting a temporary experimental license to start testing the capability in the United States." Six of the 21 Starlink satellites that launched on a Falcon 9 rocket at 10:44 p.m. Eastern from Vandenberg Space Force Base, California, carry a payload that the company said could provide connectivity for most 4G LTE devices when in range. SpaceX plans to start enabling texting from space this year in partnership with cellular operators, with voice and data connectivity coming in 2025, although the company still needs regulatory permission to provide the services commercially. Initial direct-to-smartphone tests would use cellular spectrum from SpaceX's U.S. mobile partner T-Mobile. SpaceX has also partnered with mobile operators in Australia, Canada, Chile, Japan, New Zealand, and Switzerland....

Meanwhile, early-stage ventures AST SpaceMobile and Lynk Global are closing in on fundraising deals to expand their dedicated direct-to-device constellations. AST SpaceMobile said January 2 it is seeking to secure funds this month from "multiple parties" ahead of launching its first five commercial satellites early this year on a Falcon 9. Lynk Global, which is currently providing intermittent texting and other low-bandwidth services to phones outside cellular networks in parts of the Solomon Islands, Cook Islands, and Palau, plans to raise funds by merging with a shell company run by former professional baseball player Alex Rodriguez.

The White House has convened a last-minute meeting to discuss a private lunar mission, Peregrine Mission One, after the Navajo Nation requested a delay due to cultural concerns over the transport of human ashes for burial on the moon. "The moon holds a sacred place in Navajo cosmology," said Navajo Nation President Buu Nygren in a statement. "The suggestion of transforming it into a resting place for human remains is deeply disturbing and unacceptable to our people and many other tribal nations."

If successful, the commercial mission scheduled to launch Monday "will be the first time an American-made spacecraft has landed on the lunar surface since the end of the Apollo program in 1972," notes CNN. Longtime Slashdot reader garyisabusyguy shares the report: The private companies providing these lunar burial services, Celestis and Elysium Space, are just two of several paying customers hitching a ride to the moon on Pittsburgh-based Astrobotic Technology's Peregrine lunar lander. The uncrewed spacecraft is expected to lift off on the inaugural flight of the United Launch Alliance's Vulcan Centaur rocket from Florida's Cape Canaveral Space Force Station. Celestis' payload, called Tranquility Flight, includes 66 "memorial capsules" containing "cremated remains and DNA," which will remain on the lunar surface "as a permanent tribute to the intrepid souls who never stopped reaching for the stars," according to the company's website.

"We are aware of the concerns expressed by Mr. Nygren, but do not find them substantive," Celestis CEO Charles Chafer told CNN. "We reject the assertion that our memorial spaceflight mission desecrates the moon," Chafer said. "Just as permanent memorials for deceased are present all over planet Earth and not considered desecration, our memorial on the moon is handled with care and reverence, is a permanent monument that does not intentionally eject flight capsules on the moon. It is a touching and fitting celebration for our participants -- the exact opposite of desecration, it is a celebration." Elysium Space has not responded to CNN's request for a comment, but the company's website describes its "Lunar Memorial" as delivering "a symbolic portion of remains to the surface of the Moon, helping to create the quintessential commemoration." "I've been disappointed that this conversation came up so late in the game," John Thornton, Astrobotic Technology CEO, said. "I would have liked to have had this conversation a long time ago. We announced the first payload manifest of this nature to our mission back in 2015. A second in 2020. We really are trying to do the right thing and I hope we can find a good path forward with Navajo Nation." [...]

Friday's meeting convened by the White House is scheduled to feature representatives from NASA, the FAA, the US Department of Transportation, and the Department of Commerce. But Navajo Nation officials have little hope that they will be able to stop Monday's launch. "Based off of what we're seeing, and NASA are already having their pre-launch briefing, it doesn't look like they have any intention of stopping the launch or removing the remains," Ahasteen said.

An anonymous reader quotes a report from The Verge: Using satellite imagery and AI, researchers have mapped human activity at sea with more precision than ever before. The effort exposed a huge amount of industrial activity that previously flew under the radar, from suspicious fishing operations to an explosion of offshore energy development. The maps were published today in the journal Nature. The research led by Google-backed nonprofit Global Fishing Watch revealed that a whopping three-quarters of the world's industrial fishing vessels are not publicly tracked. Up to 30 percent of transport and energy vessels also escape public tracking. Those blind spots could hamper global conservation efforts, the researchers say. To better protect the world's oceans and fisheries, policymakers need a more accurate picture of where people are exploiting resources at sea.

Until now, Global Fishing Watch and other organizations relied primarily on the maritime Automatic Identification System (AIS) to see what was happening at sea. The system tracks vessels that carry a box that sends out radio signals, and the data has been used in the past to document overfishing and forced labor on vessels. Even so, there are major limitations with the system. Requirements to carry AIS vary by country and vessel type. And it's pretty easy for someone to turn the box off when they want to avoid detection, or cruise through locations where signal strength is spotty. To fill in the blanks, Kroodsma and his colleagues analyzed 2,000 terabytes of imagery from the European Space Agency's Sentinel-1 satellite constellation. Instead of taking traditional optical imagery, which is like snapping photos with a camera, Sentinel-1 uses advanced radar instruments to observe the surface of the Earth. Radar can penetrate clouds and "see" in the dark -- and it was able to spot offshore activity that AIS missed.

Since 2,000 terabytes is an enormous amount of data to crunch, the researchers developed three deep-learning models to classify each detected vessel, estimate their size, and sort out different kinds of offshore infrastructure. They monitored some 15 percent of the world's oceans where 75 percent of industrial activity takes place, paying attention to both vessel movements and the development of stationary offshore structures like oil rigs and wind turbines between 2017 and 2021. While fishing activity dipped at the onset of the covid-19 pandemic in 2020, they found dense vessel traffic in areas that "previously showed little to no vessel activity" in public tracking systems -- particularly around South and Southeast Asia, and the northern and western coasts of Africa.

A boom in offshore energy development was also visible in the data. Wind turbines outnumbered oil structures by the end of 2020. Turbines made up 48 percent of all ocean infrastructure by the following year, while oil structures accounted for 38 percent. Nearly all of the offshore wind development took place off the coasts of northern Europe and China. In the Northeast US, clean energy opponents have tried to falsely link whale deaths to upcoming offshore wind development even though evidence points to vessel strikes being the problem. Oil structures have a lot more vessels swarming around them than wind turbines. Tank vessels are used at times to transport oil to shore as an alternative to pipelines. The number of oil structures grew 16 percent over the five years studied. And offshore oil development was linked to five times as much vessel traffic globally as wind turbines in 2021. "The actual amount of vessel traffic globally from wind turbines is tiny, compared to the rest of traffic," Kroodsma says.

NASA's Juno spacecraft made its closest flyby yet of Io, one of Jupiter's largest moons, sending back images of "sharp cliffs, edgy mountain peaks, lakes of pooled lava and even a volcanic plume," reports the New York Times. From the report: The Juno spacecraft, designed to study the origin and evolution of Jupiter, arrived at the planet in 2016. NASA extended the mission in 2021, and the orbiter has since captured photos of the Jovian moons Ganymede, Europa and most recently Io. [...] Juno conducted a number of more distant observations of Io in recent years. Its latest flyby occurred on Dec. 30, when the spacecraft came within 932 miles of the moon. The images captured during this visit were made with an instrument called JunoCam and are in visible wavelengths. They are some of the highest resolution views of Io's global structure. The mission's managers shared six images of Io on the mission's website, and members of the public have since uploaded digitally enhanced versions that highlight features on Io's surface.

Mission scientists are already at work analyzing these images, searching for differences across Io's surface to learn how often its volcanoes erupt, how bright and hot those eruptions are and how the resulting lava flows. According to Dr. Bolton, the team will also compare Juno's images to older views of the Jovian moon to determine what has changed on Io over a variety of encounters. And they'll get a second set of data to work with in a month, when Juno completes another close flyby of the explosive world on Feb. 3.

Michael Larabel reports via Phoronix: AMD engineers are proposing an FPGA Subsystem User-Space Interface to overcome current limitations of the Linux kernel's FPGA manager subsystem. AMD-Xilinx engineers are proposing a new sysfs interface for the FPGA subsystem that allows for more user-space control over FPGAs. The suggested interface would handle FPGA configuration, driver probe/remove, bridges, Device Tree Overlay file support for re-programming an FPGA while the operating system is running, and other capabilities for user-space not currently presented by the mainline kernel. [...] This proposal from AMD hopes to standardize the FPGA subsystem user-space interface in a manner that is suitable for upstreaming into the mainline Linux kernel.

Perplexity, a startup going after Google's dominant position in web search, has won backing from Jeff Bezos and venture capitalists betting that artificial intelligence will upend the way people find information online. From a report: Started less than two years ago, Perplexity has fewer than 40 employees and is based out of a San Francisco co-working space. The company's product, which it calls an answer engine, is used by about 10 million people monthly. Those ingredients were enough to persuade Institutional Venture Partners, Bezos and other tech executives to invest $74 million in the company, the largest sum raised by an internet search startup in recent years. The investment valued Perplexity at $520 million, including the new money, said Chief Executive Officer Aravind Srinivas.

Amazon.com, the e-commerce company chaired by Bezos, has committed to investing billions in Anthropic, the AI startup behind the chatbot Claude. The path to competing with Google is littered with carcasses, and Microsoft itself has struggled for years to dislodge the company's roughly 90% market share in online search. Others, including tech giants, are incorporating AI into their search engines. Perplexity's founders said their advantage is using advances in AI to provide direct answers, instead of website links, in response to search queries, without some of the limitations felt by larger companies.

SpaceX launched a total of 21 satellites on Tuesday night, including "the first six Starlink satellites with Direct to Cell capabilities that enable mobile network operators around the world to provide seamless global access to texting, calling, and browsing wherever you may be on land, lakes, or coastal waters without changing hardware or firmware. The enhanced Starlink satellites have an advanced modem that acts as a cellphone tower in space, eliminating dead zones with network integration similar to a standard roaming partner," the company said. Ars Technica reports: Besides T-Mobile in the US, several carriers in other countries have signed up to use the direct-to-cell satellites. SpaceX said the other carriers are Rogers in Canada, KDDI in Japan, Optus in Australia, One NZ in New Zealand, Salt in Switzerland, and Entel in Chile and Peru. While SpaceX CEO Elon Musk wrote that the satellites will "allow for mobile phone connectivity anywhere on Earth," he also described a significant bandwidth limit. "Note, this only supports ~7Mb per beam and the beams are very big, so while this is a great solution for locations with no cellular connectivity, it is not meaningfully competitive with existing terrestrial cellular networks," Musk wrote.

Starlink's direct-to-cell website says the service will provide text messaging only when it becomes available in 2024, with voice and data service beginning sometime in 2025. Starlink's low Earth orbit satellites will work with standard LTE phones, unlike earlier services that required phones specifically built for satellite use. SpaceX's direct-to-cell satellites will also connect with Internet of Things (IoT) devices in 2025, the company says.

A 13-year-old has beaten the original NES Tetris, previously thought to be an impossible task, after 34 years. The Gamer reports: The assumption I always had was that Tetris goes on forever and ever until you finally run out of space. While that's mostly true, as the game has no story, levels, or any form of progress beyond high scores and increasing speed, you 'beat' the game by crashing it, AKA reaching the "True Killscreen". It's called the "True Killscreen" because, for decades, it was assumed that level 29 was the Killscreen.

For context, the longer you play Tetris, the faster the blocks fall, upping the ante as you're forced to think in split-second moments about where each piece should drop. The speed caps at level 29, making it near impossible to reach the sides. So, the community believed that was the 'end' of the game. It isn't. The end comes when you reach a level so high, Tetris simply crashes.

Retired officers and departing defense officials are flocking to investment firms that are pushing the government to provide more money to defense-technology startups. The New York Times: When Defense Secretary Lloyd J. Austin III and other top officials assembled for an event this month at the Ronald Reagan Presidential Library, they walked into a lesson in how the high-stakes world of Pentagon lobbying is being altered by the rise of defense technology startups. Inside, at this elite gathering near Los Angeles of senior leaders from government and the arms industry, was a rapidly growing group of participants: former Pentagon officials and military officers who have joined venture capital firms and are trying to use their connections in Washington to cash in on the potential to sell a new generation of weapons.

They represent a new path through the revolving door that has always connected the Defense Department and the military contracting business. Retiring generals and departing top Pentagon officials once migrated regularly to the big established weapons makers like Lockheed Martin and Boeing. Now they are increasingly flocking to venture capital firms that have collectively pumped billions of dollars into Silicon Valley-style startups offering the Pentagon new war-fighting tools like autonomous killer drones, hypersonic jets and space surveillance equipment.

This new route to the private sector is one indicator of the ways in which the United States is trying to become more agile in harnessing technological advances to maintain military superiority over China and other rivals. But the close ties between venture capital firms and Defense Department decision makers have also put a new twist on long-running questions about industry access and influence at a time when the Pentagon is under pressure to rethink how it allocates its huge procurement budget.

Mozilla closed out 2023 with a report that dodges its flatlining browser market share and Mozilla.social beta in favor of calls for a faster pace from its highly paid CEO. From a report: According to the company's filings, Mitchell Baker's compensation went from $5,591,406 in 2021 to $6,903,089 in 2022. It's quite the jump considering that revenues declined from $527,585,000 to $510,389,000 in the same period. Despite the executive payout, Firefox continues to trail Google and even Microsoft in desktop browser market share. While it has not suffered any catastrophic losses, neither has it made any significant gains.

Baker, however, would very much like to speed things up and says in the State of Mozilla report: "The pace is not enough, the impact is not enough." Unsurprisingly for a technology company, the report is heavy on AI going mainstream where Mozilla reckons it can make an impact in the technology, particularly with regard to open source developers and privacy. Mozilla's adventures in AI? The organization says it has 15 engineers working on open source large language models and is working on use cases in the healthcare space. Moez Draief, managing director of Mozilla.ai, said: "There's a lot of structured data work in that industry that will feed the language models; we don't have to invent it."

India launched its first satellite on Monday to study black holes as it seeks to deepen its space exploration efforts ahead of an ambitious crewed mission next year. From a report: The spacecraft, named X-ray Polarimeter Satellite, was propelled into an orbit of 350 kilometers from an island near India's main spaceport of Sriharikota, off the southern state of Andhra Pradesh, according to S. Somanath, chairman of the Indian Space Research Organisation. The satellite, weighing about 470 kilograms, will carry out research on X-rays emanating from around 50 celestial objects with the help of two payloads built by ISRO and a Bengaluru-based research institute.

NASA launched a similar mission, the Imaging X-ray Polarimetry Explorer, in 2021 to answer questions such as why black holes spin and build on the findings of its flagship telescope Chandra X-ray Observatory that blasted off more than two decades ago. China's National Space Administration launched the country's first X-ray space telescope to observe black holes, pulsars and gamma-ray bursts in 2017.

"Navajo Nation President Buu Nygren has asked NASA to delay a scheduled launch to the Moon that could include cremated remains," reports Arizona Public Radio station KNAU: Nygren says he recently learned of the January 8 launch of the Vulcan Centaur carrying the Peregrine Mission One. The lander will carry some payloads from a company known to provide memorial services by shipping human cremated remains to the Moon. Nygren wants the launch delayed and the tribe consulted immediately. He noted the Moon is sacred to numerous Indigenous cultures and that depositing human remains on it is "tantamount to desecration."

NASA previously came under fire after the ashes of former geologist and planetary scientist Eugene Shoemaker were sent to the Moon in 1998. Then-Navajo Nation President Albert Hale said the action was a gross insensitivity to the beliefs of many Native Americans. NASA later apologized and promised to consult with tribes before authorizing any similar missions in the future.

What would happen if we built a concert venue in near-Earth orbit? A science policy journalist explores the question in the Washington Post: Forget U2 in the Las Vegas Sphere. Take me to a real concert in the round, where I can float 360 degrees around the stage, watching a guitarist shred from the perspective of a fly and inventing dance moves that Earth's gravity would forbid.

Before you dismiss this as a hallucination, consider that we're on the cusp of a new era of space travel. Engineer and space architect Ariel Ekblaw, founder of MIT's Space Exploration Initiative, says that within a decade, a trip off the planet could become as accessible as a first-class airline ticket — and that, in 15 or 20 years, we can expect space hotels in near-Earth orbit. She's betting on it, having founded a nonprofit to design spherical, modular habitats that can assemble themselves in space so as to be lightweight and compact at launch, much like the James Webb Space Telescope that NASA vaulted into deep space two years ago.

"The first era of space travel was about survival," she told me as I recently toured her lab. "We're transitioning now to build spaces that are friendlier and more welcoming so that people can thrive in space as opposed to just survive." There's no reason, Ekblaw said, that a concert hall can't be one of those structures.
The article ultimately calls this "an impulse for space travel I can get behind: curiosity about who we are and what more we can create when we reach beyond Earth. This is the realm of not just scientists and engineers but of all kinds of dreamers. It's a rendition of space exploration that can engage anyone to imagine what's possible."

As the year comes to a close, "one constant, reliable source of awe and beauty is the sky over our head..." writes astronomer Phil Plait in Scientific America

"And every year we see new things, or old things in new ways, and I've been set the wonderful task of selecting my favorites and relaying them and their import to you." End-of-year lists, especially those displaying astronomical imagery, tend to be splashy and colorful. That's understandable, but what they sometimes miss are the more subtle photographs, those that hide momentous discoveries in minor visual details or offer fresh perspectives on familiar objects. They may not leap off the page, but they still have an impact. That's what I've kept in mind while sorting through this year's celestial treasure trove. This gallery is by no means complete, but it shows what I think are some of the most interesting astronomical portraits to have emerged in 2023.

No gallery such as this would be complete without something from the James Webb Space Telescope (JWST), our newest infrared eye on the sky. This monster observatory has already brought so many small revolutions to astronomy that picking one from the past year is no small task. Should it be a baby star throwing an immense tantrum or a massive old star shedding material at colossal rates before it inevitably explodes as a supernova? Or should it be a map of a mind-stomping 100,000 galaxies?

Well, how about something very, very different — such as the skeletal structure of a nearby galaxy's intricate web of dust [also displayed at the top of Scientiic American's article]...? [I]t has a beautiful spiral structure and shows the effects of a smaller galaxy colliding with it. In the phenomenally sharp and decidedly eerie false-color view from JWST's Mid-Infrared Instrument, we see countless clouds of cosmic dust in a skeletonlike pattern. Each of these clouds is made up of small grains of rocky and sooty carbon-based molecules expelled by dying stars...

Astronomers captured this image to better understand how stars are born in stellar nurseries and how they evolve over time.

"[F]or years it was written off," writes CNN. " 'The economics were just way out,' said Martin Soltau, CEO of the UK-based company Space Solar.

"That may now be changing as the cost of launching satellites falls sharply, solar and robotics technology advances swiftly, and the need for abundant clean energy to replace planet-heating fossil fuels becomes more urgent." There's a "nexus of different technologies coming together right now just when we need it," said Craig Underwood, emeritus professor of spacecraft engineering at the University of Surrey in the U.K. The problem is, these technologies would need to be deployed at a scale unlike anything ever done before... "The big stumbling block has been simply the sheer cost of putting a power station into orbit." Over the last decade, that has begun to change as companies such as SpaceX and Blue Origin started developing reusable rockets. Today's launch costs at around $1,500 per kilogram are about 30 times less than in the Space Shuttle era of the early 1980s.

And while launching thousands of tons of material into space sounds like it would have a huge carbon footprint, space solar would likely have a footprint at least comparable to terrestrial solar per unit of energy, if not a smaller, because of its increased efficiency as sunlight is available nearly constantly, said Mamatha Maheshwarappa, payload systems lead at UK Space Agency. Some experts go further. Underwood said the carbon footprint of space-based solar would be around half that of a terrestrial solar farm producing the same power, even with the rocket launch...

There is still a huge gulf between concept and commercialization. We know how to build a satellite, and we know how to build a solar array, Maheshwarappa said. "What we don't know is how to build something this big in space..." Scientists also need to figure out how to use AI and robotics to construct and maintain these structures in space. "The enabling technologies are still in a very low technology readiness," Maheshwarappa said. Then there's regulating this new energy system, to ensure the satellites are built sustainably, there's no debris risk, and they have an end-of-life plan, as well as to determine where rectenna sites should be located. Public buy-in could be another huge obstacle, Maheshwarappa said. There can be an instinctive fear when it comes to beaming power from space.

But such fears are unfounded, according to some experts. The energy density at the center of the rectenna would be about a quarter of the midday sun. "It is no different than standing in front of a heat lamp," Hajimiri said.
The article argues that governments and companies around the world "believe there is huge promise in space-based solar to help meet burgeoning demand for abundant, clean energy and tackle the climate crisis." And they cite several specific examples:

• In 2020 the U.S. Naval Research Lab launched a module on an orbital test vehicle, to test solar hardware in space conditions.

• This year Caltech electrical engineering professor led a team that successfully launched a 30-centimeter prototype equipped with transmitters — and successfully beamed detectable energy down to earth.

• In June the U.K. government announced over $5 million in funding to universities and tech companies "to drive forward innovation" in the space-based solar sector.

• The U.S. Air Force Research Lab plans to launch a small demonstrator in 2025.

• Europe's its Solaris program aims to prove "the technical and political viability of space-based solar, in preparation for a possible decision in 2025 to launch a full development program."

• One Chinese spacecraft designer and manufacturer hopes to send a solar satellite into low orbit in 2028 and high orbit by 2030, according to a 2022 South China Morning News report.

SpaceX on Thursday launched two rockets into orbit, only three hours apart, bringing its total number of launches to 98 in 2023. Space.com reports: The first SpaceX mission to take to the skies Thursday (Dec. 28) was a Falcon Heavy rocket carrying the U.S. military's secretive X-37B space plane, designed mission USSF-52. That blasted off from NASA's Kennedy Space Center in Florida at 8:07 p.m. EST (0107 GMT on Dec. 29). This marked the second Falcon Heavy flight of 2023. Second up on the launch docket for Thursday, hours later, was a Falcon 9 liftoff carrying 23 SpaceX Starlink units to low Earth orbit from nearby Cape Canaveral Space Force Station. This launch took place at 11:01 p.m. EST (0401 GMT on Dec. 29). This was SpaceX's 98th and final launch of 2023, and the 96th flight for a Falcon 9 rocket this year.

SpaceX's 97th launch overall for this year marked the seventh flight for X-37B, but the first time the space plane hitched a lift atop a Falcon Heavy rocket. The X-37B/Falcon Heavy launch had been scrubbed several times previously due to bad weather and an issue with ground equipment. The launch of 23 Starlink broadband satellites from Space Launch Complex 40 (SLC-40) at Cape Canaveral Space Force Station in Florida that capped off 2023 was also the 96th launch of a Falcon 9 rocket during this year. SpaceX's next launch is targeted for Jan. 2, 2024 and will see a further 21 Starlink satellites lift to orbit to join the over 5,500 internet supplying units currently orbiting Earth.