Year: 2026

March 5, 2026 Quick space links

3:32 pm

As BtB’s stringer Jay is on vacation, there wasn’t going to be a quick links today. Then Robert Pratt of Pratt on Texas sent me the two links below. Thank you Robert!

This post is also an open thread. I welcome my readers to post any comments or additional links relating to any space issues, even if unrelated to the links below.

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New Webb data says asteroid 2024 YR4 will miss the Moon in 2032

2:54 pm

Asteroid 2024 YR4 as seen by Webb in the mid-infrared
Asteroid 2024 YR4 as seen by Webb in the
mid-infrared in April 2025. Click for original image.

New Webb data collected in February has now eliminated any chance the potentially dangerous asteroid 2024 YR4 will hit either the Earth or the Moon when it makes its next close pass on December 22, 2032.

Using data from NASA’s James Webb Space Telescope observations collected on Feb. 18 and 26, experts from NASA’s Center for Near-Earth Object Studies at the agency’s Jet Propulsion Laboratory in Southern California have refined near-Earth asteroid 2024 YR4’s orbit and are ruling out a chance of lunar impact on Dec. 22, 2032. With the new data, 2024 YR4 is expected to pass by the lunar surface at a distance of 13,200 miles (21,200 km).

Earlier less precise data had suggested 2024 YR4 had a 4.3% chance of hitting the Moon in 2032. That chance is now zero. This result is actually disappointing, in that an impact of this asteroid, estimated to be about 200 feet in diameter, would have not only been spectacular, but would have been scientifically useful. We would have been able to observe it closely with many ground- and space-based telescopes, and garnered a lot of useful information about the asteroid, the Moon, and the very nature of impacts.

The impact would have also eliminated the chance this asteroid might hit the Earth in the future. 2024 YR4 orbits the Sun about every four years. Previous calculations suggested another potentially dangerous fly-by of Earth in 2047, but these numbers are unreliable because the orbit will be changed by the 2032 fly-by in ways that cannot be predicted as yet.

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Vast raises $500 million in new private investment capital

1:47 pm

Haven-2
Vast’s full Haven-2 station once completed

The space station startup Vast today announced it has raised another $500 million in new private investment capital, bringing the total so far invested in the company’s space station project to more than one billion.

The financing round was led by Balerion Space Ventures with participation from IQT, Qatar Investment Authority (QIA), Mitsui & Co., Ltd, MUFG, Nikon Corporation (Nikon), Stellar Ventures, Space Capital, and Earthrise Ventures. Jed McCaleb, founder and first investor, also participated in the round. As part of the transaction, Balerion Advisor A.C. Charania, former Chief Technologist for NASA, will join the Vast board.

…To date, more than $1 billion has been invested in Vast’s space stations technologies and facilities—resources that NASA and government partners can leverage to ensure readiness to replace the ISS in 2030. The latest financing includes $300 million in Series A equity and $200 million in debt to support the continued development of Vast’s Haven space stations. The funds will be used to expand facilities, grow the team, and advance the company’s proposed successor to the ISS, Haven-2, designed to ensure continuous human presence in low-Earth orbit for the United States and its allies.

Hat tip to reader Richard M for letting me know about this announcement.

In my rankings below of the five American commercial space stations presently in development, I rank Vast #1. This new investment helps solidify its first place standing.
» Read more

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The American Revolution, as seen from across the Atlantic

1:15 pm

The First Salute by Barbara Tuchman

As this year is the 250th anniversary of the signing of the Declaration of Independence, it seems fitting to review a history about the Revolutionary War. In fact, I intend to do a few more such reviews in the coming months.

Let’s start however with a book that looks at that Revolution from a very different perspective.

Historian Barbara Tuchman is most well known for her early classic, The Guns of August, a book that was made famous when John Kennedy repeatedly referred to it during the Cuban missile crisis. Kennedy’s recommendation not only brought the book to the attention of the general public, it made Tuchman’s career. From that day forth, her work has always been received with accolades and enthusiasm and uncritical respect.

I am here however to break that bubble, though only partly. I just finished reading The First Salute, Tuchman’s 1988 history of the Revolutionary War. Rather than tell the tale from the point of view of the Americans, as done by most historians, Tuchman’s work looks at the war from the point of view of Europe, and thus gives us a much larger and very worthwhile context.

For this I compliment Tuchman highly. Though it is well known that the arrival of the French fleet off the coast of Virginia was crucial in forcing the British army to surrender to Washington at Yorktown, the background behind that arrival has generally been given short shrift by historians. Tuchman does not, describing in detail the political maneuvering necessary between the American envoys in France and France’s government to make that fleet happen. She also describes the attitudes of the Dutch and Spain to the war, and how and why they eventually moved to support America, even though there were many reasons for them to stay out.

Her book also gives us the British perspective, revealing the amazing and continuous failures of its government and generals to wage the war with any enthusiasm or skill. It appears almost from the start that the British had no great desire to win, and that malaise and overconfidence more than anything resulted in their eventual defeat.

For example, the British never took Washington or his army seriously. » Read more

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The auroras of Jupiter and Ganymede

11:13 am

According to two different university press releases in the past month, new details have been discovered about the auroras found on Jupiter as well as its largest moon, Ganymede, caused by the interaction of Jupiter’s powerful magnetic field not only with Ganymede’s weak one but with the motion of all four Galilean moons as they orbit the gas giant.

The first study used data from Juno when it made a close fly-by of Ganymede in 2021. It not only showed how the aurora was caused by interaction between the magnetic fields of Jupiter and Ganymede, it found that Ganymede’s auroras were similar to those on Earth.

Similar structures, known as ‘beads’, have been observed in the auroras of Earth and Jupiter, where they are linked to sub-storms and dawn storms, large-scale rearrangements of the magnetosphere that release enormous amounts of energy and produce intense auroral activity,” explains Alessandro Moirano, post-doctoral researcher at LPAP.

Ganymede interacts with Jupiter’s space environment in a similar way to how Earth interacts with the solar wind; therefore, the discovery of auroral patches on Ganymede similar to those on Earth suggests that the fundamental physical process(es) could be generally induced in the coupling between any celestial body, its magnetosphere, and external forces.

The aurora's on Jupiter
The auroral footprints of Io and Europa
on Jupiter

The second study, released yesterday, used the Webb Space Telescope to a get a more detailed look at Jupiter’s auroras, caused as the four Galilean moons — Io, Europa, Ganymede, and Callisto — travel through Jupiter’s powerful magnetic field, causing energetic particles to following Jupiter’s magnetic field lines down to its poles, there creating the auroras.

Webb’s data found that the auroral footprints on Jupiter caused by each moon were different from Jupiter’s own aurora.

However, the footprints created by Io and Europa, did not have the characteristics expected from Jupiter’s main aurora, which contains a lot of hot material. Instead, in one snapshot, they discovered a cold spot within Io’s auroral footprint that registered temperatures much lower than expected, with extraordinarily high densities.

As the data was limited to a single 22-hour window, the results are very uncertain. More observations are planned, covering a longer time period, to see if this phenomenon can be captured again.

All of these results are very tantalizing, but to really get a handle on what is going on will require continuous observations over years, from many spacecraft devoted exclusively to Jupiter. And that isn’t going to happen for quite some time.

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The United Kingdom’s Labor government to spend £500 million on space

10:07 am

The UK Space Agency, gone but not forgotten
The UK Space Agency, gone but not forgotten

My heart be still! The United Kingdom’s present Labor government yesterday announced it has allocated an additional £500 million ($665 million) on a wide range of space projects, all of which are either new government programs or facilities or direct subsidies to its failing space businesses.

Nowhere in this announcement did government officials address the choking regulations and burdensome licensing requirements that have essentially driven away all space business while bankrupting two different rocket startups, Virgin Orbit and Orbex.

In addition to the £1.7 billion committed to European Space Agency (ESA) programmes in November 2025, the government is allocating more than £500 million to national space programmes:

  • £105 million to develop civil capabilities for in-orbit servicing and manufacturing (ISAM) – an emerging market where the UK has a strong competitive edge and opportunities to deliver significant commercial returns and strengthen national resilience
  • £85 million to develop the National Space Operations Centre, including £40 million to build a new ground‑based sensing network, supporting the 24/7 requirement to protect satellites and manage an increasingly crowded space environment
  • £80 million to deliver the Connectivity in Low Earth Orbit (C-LEO) programme, including for a new £30m funding call opened today to support UK businesses developing smarter satellites, advanced hardware and AI‑enabled data delivery
  • £65 million for the National Space Innovation Programme to accelerate breakthrough technologies and boost commercialisation
  • £40 million for the Unlocking Space Programme to drive market demand for space technology, develop national security capabilities and attract private investment to support the scale up of UK firms
  • £37 million to develop space clusters, building on local strengths and ensuring the benefits of space reach every corner of the UK
  • £20 million to accelerate spaceport infrastructure development in Scotland

The announcement was made in connection with the decision by this Labor government to eliminate the UK Space Agency as a separate bureaucracy, consolidating it into the Department for Science, Innovation and Technology (DSIT). The consolidation was intended to save money and make the government more efficient, but this announcement suggests it is being used to funnel more cash into DSIT’s bureaucracy, simply under a different name.

None of this is going to do much to promote an independent space industry in Great Britain. As long as it continues to take years to get launch licenses, rocket companies are not going to launch from its spaceports. And without those launches, its space industry is going to be seriously handicapped. And dumping cash into these various government programs won’t do much either to promote competition or innovation. All the UK will get is more bureaucracy and government control.

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Does weightlessness cause blood clots?

9:44 am

The uncertainty of science: A new study on Earth using an “dry immersion tank” now suggests that weightlessness could increase the chances that female astronauts could get blood clots during long space missions.

First reported in 2020, an International Space Station mission detected an unexpected blood clot in a female astronaut’s jugular vein. To date, space-health research has had more male participants but with the number of female astronauts on the rise, a new SFU–European Space Agency study examined how microgravity affects blood clotting specifically in women. Key findings

  • 18 female participants experienced five days of continuous simulated microgravity in a European Space Agency (ESA)-sponsored VIVALDI I dry immersion study.
  • Coagulation time (the time it took for blood clots to start forming) was longer.
  • Once started, clots formed faster.
  • Once formed, the strength and stability of the clots was greater

The dry immersion tank is “a specially designed water bath with a waterproof sheet to keep participants dry while floating, and simulating weightlessness.”

The researchers admit these results are very uncertain. For one, none of the clots that occurred during the study were “clinically concerning,” which means they were the kind of clots that the body deals with normally without threat. The researchers also noted in their paper’s abstract that “current published research on this topic is male-centered,” which explains the female focus of this particular research.

This research suggests that blood clots could be an issue on long missions in weightlessness, but the data is sparse and very incomplete. Moreover, based on more than a quarter century of missions longer than six months in space, it appears the one blood clot cited above might have been the only incident so far recorded. And any results using immersion tanks on Earth is questionable, as they are a poor substitute for actual weightlessness in space.

Nonetheless, these results add weight to the need for developing interplanetary spaceships with some sort of artificial gravity. Without it, the health of any passengers going on long missions to other planets like Mars is certainly at risk, not simply from blood clots but from bone loss, vision damage, spinal deformities, and overall loss of cardio-vascular and muscular strength, all issues that have been documented well in space.

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Third launch attempt by Japanese rocket startup Space One fails

8:17 pm

Kairos rocket just after failure

In another attempt to do the maiden launch its orbital Kairos rocket today, the Japanese rocket startup Space One experienced its third launch failure, with the rocket breaking up about a minute after launch.

The screen capture to the right shows the rocket just after failure. The cloud arc in the upper left is the moment some burst occurred. Within seconds it was clear that the rocket was now in several pieces.

The launch attempt, which took place from the company’s own spaceport, Spaceport Kii, on the southern coast of the main island of Japan, was the third failure in a row, all involving failures of the first stage. The first launch in March 2024 blew up mere seconds after launch. The second attempt in December 2024 failed about 90 seconds after launch when the rocket began to spiral out of control.

This third launch appeared more controlled, but it also occurred only a minute after launch.

Whether the company can survive a third straight failure, none of which got even close to main engine cutoff and stage separation, is unknown. The company has some major investors, including Canon, several major Japanese banks, and the government-owned Development Bank of Japan. While they might stick with the company, it would not be surprising if there was a major shake-up in management.

Japan at the moment has no operational launch capability. Space One is its only private rocket startup, while the two rockets belonging to its space agency JAXA, H3 and Epsilon, are both grounded due to launch failures.

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NASA initiates new program to grab talent from the private sector

4:00 pm

Where new talent will now go to wither
Where new talent will now go to wither.

As part of NASA administrator’s effort to remake NASA into a cutting edge agency, “the global leader in space,” the agency in partnership with the federal Office of Personnel Management (OPM) has initiated a new program, dubbed NASA Force, to recruit talent from the private sector for two-year terms, after which they can then try to get a full time job either with NASA or a private aerospace company.

NASA Force will identify and place high-impact technical talent into mission-critical roles supporting NASA’s exploration, research, and advanced technology priorities, ensuring the agency has the cutting-edge expertise needed to maintain U.S. leadership in space.

Tech Force, led by OPM, was established to recruit elite technical professionals into federal service, embed them at partner agencies to modernize systems, accelerate innovation, and strengthen mission delivery. NASA Force represents a focused expansion of that effort, tailored to the unique technical demands of space exploration and aerospace research.

“America’s leadership in space depends on extraordinary talent,” said NASA Administrator Jared Isaacman. “NASA Force will help us attract the next generation of innovators and technical experts who are ready to solve the toughest challenges in exploration, science, and aerospace technology. This partnership strengthens our workforce and helps ensure the United States remains the global leader in space.”

This program however has things entirely backwards. The last thing any engineer who has just graduated college should do is get a short two-year job at NASA. He or she will learn all the wrong lessons, working for a government agency not interested in efficiency or profit.

Instead, it is essential the first job new engineers get is in the private sector, to learn how to do things fast and efficiently. It Isaacman had the right priorities, he would use this money to fund these jobs in the private sector, so that new graduates will get the right training. Unfortunately, that is not Isaacman’s priority. He wants the government to lead.

Moreover, NASA’s job was never intended to be “the global leader in space.” Its job was to formulate the federal government’s needs in space, and then ask the private sector — the American people — to get the job done. Isaacman instead wants to have NASA do the job, as it did for a half century after Apollo, quite poorly. Only after the agency began relying on private enterprise beginning in 2008, the capitalism model, did things finally start happening again.

The worst aspect of this program is that it will take talent away from the private sector. A lot of good and talented young engineers will gravitate to these NASA positions for the high pay, relatively easy good hours, and prestige. They won’t accomplish much there, and their training will be wrong-headed. Meanwhile, the private sector will lose that talent and have to find it elsewhere, assuming it is available at all.

24 comments

March 4, 2026 Quick space links

2:55 pm

As BtB’s stringer Jay is on vacation, here are a few links I spotted that don’t deserve full posts. This post is also an open thread. I welcome my readers to post any comments or additional links relating to any space issues, even if unrelated to the links below.

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