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OpenAI CEO considers exploring the space data frontier

Stoke Space hotfire test of booster engine
Stoke Space’s Zenith booster engine blazes during a hot-fire test in 2024. (Stoke Space Photo)

OpenAI CEO Sam Altman is thinking about expanding into the final frontier for data centers, and his efforts to follow through on that thought reportedly turned into talks with Stoke Space, a rocket startup headquartered just south of Seattle.

Altman looked into putting together funding to invest in Stoke Space, with an eye toward either forging a partnership or ending up with a controlling stake in the company, according to an account published by The Wall Street Journal. The discussions reportedly began this summer and picked up in the fall, but are said to be no longer active.

Such a move would open up a new front in Altman’s competition with SpaceX founder Elon Musk, who has talked about scaling up Starlink V3 satellites to serve as data centers for AI applications. “SpaceX will be doing this,” Musk wrote in a post to his X social-media platform.

Jeff Bezos, the founder of Amazon and the Blue Origin space venture, has voiced a similar interest in orbital data centers — as has Google CEO Sundar Pichai. Google is partnering with Planet Labs on a space-based data processing effort known as Project Suncatcher.

The tech world’s appetite for data processing and storage is being driven by the rapidly growing resource requirements of artificial intelligence applications. Altman addressed the subject on Theo Von’s “This Past Weekend” podcast in July.

“I do guess that a lot of the world gets covered in data centers over time,” Altman said. “But I don’t know, because maybe we put them in space. Like, maybe we build a big Dyson sphere on the solar system and say, ‘Hey, it actually makes no sense to put these on Earth.’”

Citing unidentified sources, the Journal said Altman has been exploring the idea of investing in space ventures to follow through on that thought. Kent, Wash.-based Stoke Space, which is working on a fully reusable rocket called Nova, reportedly became a focus of his interest.

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GeekWire

How a decades-old idea sparked a hot new space venture

Portal CEO Jeff Thornburg with vacuum chamber
Portal Space Systems CEO Jeff Thornburg checks out the vacuum chamber where space hardware is tested. (GeekWire Photo / Alan Boyle)

BOTHELL, Wash. — Before he became the CEO of Portal Space Systems, Jeff Thornburg worked for two of the world’s most innovative space-minded billionaires. Now he’s working on an idea those billionaires never thought to pursue: building a spacecraft powered by the heat of focused sunlight.

Thornburg and his teammates are aiming to make Bothell-based Portal the first commercial venture to capitalize on solar thermal propulsion, a technology studied decades ago by NASA and the U.S. Air Force. The concept involves sending a propellant through a heat exchanger, where the heat gathered up from sunlight causes it to expand and produce thrust, like steam whistling out of a teakettle.

The technology is more fuel-efficient than traditional chemical propulsion — and faster-acting than solar electric propulsion, which uses solar arrays to turn sunlight into electricity to power an ion drive. Solar thermal propulsion nicely fills a niche between those two methods to move a spacecraft between orbits. But neither NASA nor the Air Force followed up on the concept.

“They didn’t abandon it for technical reasons,” Thornburg said. At the time, it just didn’t make economic or strategic sense to take the concept any further.

What’s changed?

“Lower launch costs, coupled with additive manufacturing, are the major unlocks to bring the tech to life, and make it affordable and in line with commercial development,” Thornburg said.

Thornburg argues that it’s the right time for Portal’s spacecraft to fill a gap in America’s national security posture on the high frontier. “There was no imperative for rapid movement on orbit in the 1990s,” he said. “Only recently have the threats from our adversaries highlighted the weaknesses in current electric propulsion systems, in that they have so little thrust and can’t enable rapid mobility.”

Portal’s vision has attracted interest — and financial support — from investors and potential customers. Since its founding in 2021, the startup has raised more than $20 million in venture capital. In 2024, Portal won a commitment for $45 million in public-private funding from SpaceWERX, the innovation arm of the U.S. Space Force. And next year, Portal is due to demonstrate its hardware for the first time in orbit.

So, how did Thornburg hit upon the idea of turning a decades-old idea into reality?

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Amazon gears up for beta test of satellite internet service

Worker installing satellite antenna on building roof
A worker installs an Amazon Leo antenna at a Hunt Energy facility. (Amazon Photo)

Amazon Leo — the satellite internet service provider formerly known as Project Kuiper — says it has started shipping its top-of-the-line terminals to select customers for testing.

Today’s announcement serves as further evidence that Amazon is closing in on providing space-based, high-speed access to the internet to customers around the world after years of preparation. Amazon Leo is still far behind SpaceX’s Starlink satellite network, but the Seattle-based tech giant has lined up a wide array of partners to help get its network off the ground.

The top tier of Amazon Leo’s global broadband service, known as Leo Ultra, will offer download speeds of up to 1 gigabit per second and upload speeds of up to 400 megabits per second, Amazon said today in a blog post. That’s the first time Amazon has shared details about uplink performance.

During an enterprise preview, some of Amazon’s business customers will begin testing the network using production-grade hardware and software. Amazon said the preview will give its Leo teams “an opportunity to collect more customer feedback and tailor solutions for specific industries ahead of a broader rollout.”

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Blue Origin supersizes New Glenn rocket for heavier tasks

Illustration: New Glenn rocket lifting off with moon in the sky above
An artist’s conception shows Blue Origin’s New Glenn rocket with nine BE-4 engines on its first stage. (Blue Origin Illustration)

Just a week after a successful launch of its heavy-lift New Glenn rocket, Jeff Bezos’ Blue Origin space venture says it will make New Glenn even heavier.

The new super-heavy-lift variant of Blue Origin’s most powerful rocket, known as New Glenn 9×4, will feature nine methane-fueled BE-4 engines on the first stage, up from seven; and four hydrogen-fueled BE-3U engines on the second stage, up from two. The 9×4 rocket will also have a bigger fairing, or nose-cone section, measuring 8.7 meters (28.5 feet) wide, as opposed to 7 meters (23 feet) for the fairing currently in use.

Blue Origin says it’s working to enhance the performance of the rocket engines on both the New Glenn 9×4 and the standard 7×2 model. Other upgrades will include a reusable fairing, a lower-cost tank design and a higher-performing thermal protection system.

The upgrades will be phased into upcoming New Glenn missions starting with the next launch, which is expected to occur early next year. “These enhancements will immediately benefit customers already manifested on New Glenn to fly to destinations including low Earth orbit, the moon and beyond,” the company said in an online update.

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Scientists simulate the brain on a supercomputer

Visuaization of mouse cortex
This color-coded representation of a mouse cortex simulates the activity of brain cells. (Video via Allen Institute)

Creating a virtual brain may sound like a science-fiction nightmare, but for neuroscientists in Japan and at Seattle’s Allen Institute, it’s a big step toward a long-held dream.

They say their mouse-cortex simulation, run on one of the world’s fastest supercomputers, could eventually open the way to understanding the mechanisms behind maladies such as Alzheimer’s disease and epilepsy — and perhaps unraveling the mysteries of consciousness.

“This shows the door is open,” Allen Institute investigator Anton Arkhipov said today in a news release. “It’s a technical milestone giving us confidence that much larger models are not only possible, but achievable with precision and scale.”

Arkhipov and his colleagues describe the project in a research paper being presented this week in St. Louis during the SC25 conference on high-performance computing. The simulation models the activity of a whole mouse cortex, encompassing nearly 10 million neurons connected by 26 billion synapses.

To create the simulation, researchers fed data from the Allen Cell Types Database and the Allen Connectivity Atlas into Supercomputer Fugaku, a computing cluster developed by Fujitsu and Japan’s RIKEN Center for Computational Science. Fugaku is capable of executing more than 400 quadrillion operations per second, or 400 petaflops.

The massive data set was translated into a 3-D model using the Allen Institute’s Brain Modeling ToolKit. A simulation program called Neulite brought the data to life as virtual neurons that interact with each other like living brain cells.

Scientists ran the program in different scenarios, including an experiment that used the full-scale Fugaku configuration to model the entire mouse cortex.

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Universe Today

NASA faces another shift in its leadership — and its vision

An artist's conception shows astronauts on the moon with SpaceX's Starship lander in the background. (Credit: NASA)

NASA is facing increasingly sharp challenges as it pursues its goal of landing astronauts on the moon again before this decade is out — and as the space agency braces for another leadership change, it’s clear that the year ahead will also bring further challenges. How will NASA fare?

“There’s a lot left up in the air, though the signs are more positive than I would have said a couple of months ago,” Casey Dreier, chief of space policy at the nonprofit Planetary Society, said this week at the ScienceWriters2025 conference in Chicago.

One of the big issues left up in the air has to do with who’ll be at the helm at the world’s leading space agency. On his first day in office, President Donald Trump chose tech billionaire Jared Isaacman to become NASA’s administrator. In May, Trump withdrew the nomination in the midst of a spat with SpaceX founder Elon Musk — but just this month, Isaacman’s nomination was revived.

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Blue Origin sends probes to Mars and brings back booster

Blue Origin’s New Glenn rocket rises from its Florida launch pad
Blue Origin’s New Glenn rocket rises from its Florida launch pad. (Blue Origin Photo via Dave Limp / X)

Jeff Bezos’ Blue Origin space venture sent twin orbiters on the first leg of their journey to Mars today, marking a successful sequel to January’s first liftoff of the company’s heavy-lift New Glenn launch vehicle.

The trouble-free launch of NASA’s Escapade probes, plus today’s first-ever recovery of a New Glenn booster, bolstered Blue Origin’s status as a worthy competitor for Elon Musk’s SpaceX, which has come to dominate the space industry. SpaceX is the only other company to bring back an orbital-class booster successfully.

New Glenn — which is named after John Glenn, the first American to go into orbit — rose from its launch pad at Cape Canaveral Space Force Station in Florida at 3:55 p.m. ET (12:55 p.m. PT). Today’s liftoff followed earlier attempts that had to be scratched, initially due to cloudy weather on Earth, and then due to a solar storm in space.

Minutes after New Glenn rose into the sky, the mission plan called for the rocket’s first-stage booster to fly itself back to a touchdown on a floating platform in the Atlantic that was named Jacklyn after Bezos’ late mother. Blue Origin’s first attempt to recover a New Glenn booster failed in January — but this time, the maneuver was successful.

That achievement was greeted by wild cheers from Blue Origin team members watching the webcast, including Jeff Bezos at Mission Control and a crowd at the company’s headquarters in Kent, Wash. The uncertainty about recovering the booster was reflected in the nickname it was given: “Never Tell Me the Odds.”

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Portal unveils a new breed of maneuverable spacecraft

Illustration: Starburst spacecraft in orbit with Supernova vehicle in background
Artwork shows Portal’s Starburst spacecraft in the foreground with its Supernova vehicle in the background. (Portal Space Systems Illustration)

Bothell, Wash.-based Portal Space Systems has added another spacecraft to its product line: a rapid-maneuverability vehicle called Starburst, which takes advantage of technologies that are being developed for its more powerful Supernova satellite platform.

Starburst-1 is due to star in Portal’s first free-flying space mission with live payloads a year from now, starting with a launch on SpaceX’s Transporter-18 satellite rideshare mission. Portal says the mission will demonstrate rendezvous and proximity operations, rapid retasking and rapid orbital change for national security and commercial applications.

Starburst is designed to bring maneuverability to missions that rely on constellations of small satellites, an approach known as proliferated space architecture. Such an approach is already being used for commercial constellations including SpaceX’s Starlink and Amazon’s Project Kuiper, and the concept is also gaining traction for national security applications.

Portal says Starburst and the larger Supernova platform will share many manufacturing processes and core systems, including the thrusters being developed for Supernova’s reaction control system. Like Supernova, Starburst will use heated ammonia as a propellant.

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Fiction Science Club

A fictional Grand Tour portrays Pluto as it really is

New Horizons view of Sputnik Planitia
NASA's New Horizons probe sent back a view of a Texas-sized ice sheet known as Sputnik Planitia. (Credit: NASA GSFC / SwRI / JHUAPL)

NASA’s New Horizons mission to Pluto has forced astronomers to rewrite their textbooks — but that’s not all: New Horizons also forced Les Johnson to rewrite a novel.

The space scientist was tasked with taking notes that the famed science-fiction writer and editor Ben Bova left behind when he died in 2020, and turning them into a novel set on Pluto to close out Bova’s Grand Tour series of solar system tales.

In the material that Bova had written for “Pluto,” he described a rocky world with just a little bit of ice on it. But when Johnson sent those notes to planetary scientist Alan Stern, the New Horizons mission’s principal investigator, had to set him straight.

“His first comment back to me was, ‘We never found anything on Pluto that was anything like that,'” Johnson says in the latest episode of the Fiction Science podcast. “And so I realized at that point that I was going to have to go back and revise the science behind the story of the environment on Pluto.”

The result is one of the first works of fiction that provides detailed descriptions of Pluto’s true surroundings, right down to the orange-tinged ice sheet of Sputnik Planitia and the dark and dirty spot on Charon, Pluto’s largest moon.

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Universe Today

Super-quiet X-59 supersonic jet makes first test flight

X-59 aircraft flying over Mojave Desert with mountains in background
The X-59 low-boom supersonic aircraft flies over California's Mojave Desert. (Credit: Lockheed Martin)

In partnership with NASA, Lockheed Martin Skunk Works has executed the first test flight of the X-59 quiet supersonic aircraft. This week’s first flight was subsonic, but eventually the plane will demonstrate technologies aimed at reducing sonic booms to gentle thumps.

“We are thrilled to achieve the first flight of the X-59,” OJ Sanchez, Skunk Works’ vice president and general manager, said in a news release. “This aircraft is a testament to the innovation and expertise of our joint team, and we are proud to be at the forefront of quiet supersonic technology development.”

Acting NASA Administrator Sean Duffy called the X-59 “a symbol of American ingenuity.”

“The American spirit knows no bounds. It’s part of our DNA – the desire to go farther, faster and even quieter than anyone has ever gone before,” he said. “This work sustains America’s place as the leader in aviation and has the potential to change the way the public flies.”

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