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Received yesterday — 12 December 2025

Elon Musk’s SpaceX Valued at $800 Billion, as It Prepares to Go Public

12 December 2025 at 19:55
A sale of insider shares at $421 a share would make Mr. Musk’s rocket company the most valuable private company in the world, as it readies for a possible initial public offering next year.

© Meridith Kohut for The New York Times

The SpaceX launchpad in South Texas in June 2024. The company said in a letter to employees on Friday that it could go public in 2026.

Investors commit quarter-billion dollars to startup designing “Giga” satellites

12 December 2025 at 10:23

A startup established three years ago to churn out a new class of high-power satellites has raised $250 million to ramp up production at its Southern California factory.

The company, named K2, announced the cash infusion on Thursday. K2’s Series C fundraising round was led by Redpoint Ventures, with additional funding from investment firms in the United States, the United Kingdom, and Germany. K2 has now raised more than $400 million since its founding in 2022 and is on track to launch its first major demonstration mission next year, officials said.

K2 aims to take advantage of a coming abundance of heavy- and super-heavy-lift launch capacity, with SpaceX’s Starship expected to begin deploying satellites as soon as next year. Blue Origin’s New Glenn rocket launched twice this year and will fly more in 2026 while engineers develop an even larger New Glenn with additional engines and more lift capability.

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© K2

Received before yesterday

Planned satellite constellations may swamp future orbiting telescopes

3 December 2025 at 11:26

On Wednesday, three NASA astronomers released an analysis showing that several planned orbital telescopes would see their images criss-crossed by planned satellite constellations, such as a fully expanded Starlink and its competitors. While the impact of these constellations on ground-based has been widely considered, orbital hardware was thought to be relatively immune from their interference. But the planned expansion of constellations, coupled with some of the features of upcoming missions, will mean that at least one proposed observatory will see an average of nearly 100 satellite tracks in every exposure.

Making matters worse, some of the planned measures meant to minimize the impact on ground-based telescopes will make things worse for those in orbit.

Constellations vs. astronomy

Satellite constellations are a relatively new threat to astronomy; prior to the drop in launch costs driven by SpaceX’s reusable rockets, the largest constellations in orbit consisted of a few dozen satellites. But the rapid growth of the Starlink system caused problems for ground-based astronomy that are not easy to solve.

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© NASA

Attack, defend, pursue—the Space Force’s new naming scheme foretells new era

20 November 2025 at 08:48

A little more than a century ago, the US Army Air Service came up with a scheme for naming the military’s multiplying fleet of airplanes.

The 1924 aircraft designation code produced memorable names like the B-17, A-26, B-29, and P-51—B for bomber, A for attack, and P for pursuit—during World War II. The military later changed the prefix for pursuit aircraft to F for fighter, leading to recognizable modern names like the F-15 and F-16.

Now, the newest branch of the military is carving its own path with a new document outlining how the Space Force, which can trace its lineage back to the Army Air Service, will name and designate its “weapon systems” on the ground and in orbit. Ars obtained a copy of the document, first written in 2023 and amended in 2024.

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© York Space Systems

Northern Lights Are Beautiful, but for Satellites They’re Risky

12 November 2025 at 20:53
At least one space launch has been put on hold, as satellite operators and rocket companies manage the effects of the current geomagnetic storm hitting Earth.

© Helioviewer Project/NASA/ESA

Northern Lights Are Beautiful, but for Satellites They’re Risky

12 November 2025 at 20:53
At least one space launch has been put on hold, as satellite operators and rocket companies manage the effects of the current geomagnetic storm hitting Earth.

© Helioviewer Project/NASA/ESA

Blue Origin Scrubs Launch of NASA’s ESCAPADE Mission to Mars

9 November 2025 at 19:32
The second flight of the orbital rocket from Jeff Bezos’s space company was halted by weather. The company may try again on Wednesday.

© Joe Skipper/Reuters

The Blue Origin New Glenn rocket seen at the Cape Canaveral Space Force Station in Cape Canaveral, Fla., on Sunday.

Blue Origin Scrubs Launch of NASA’s ESCAPADE Mission to Mars

9 November 2025 at 19:32
The second flight of the orbital rocket from Jeff Bezos’s space company was halted by weather. The company may try again on Wednesday.

© Joe Skipper/Reuters

The Blue Origin New Glenn rocket seen at the Cape Canaveral Space Force Station in Cape Canaveral, Fla., on Sunday.
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