Tag: spaceflight

Australian rocket startup Gilmour pinpoints cause of first rocket launch failure

8:01 am

Eris rocket launch and failure
Click for video, cued to just before launch. The red
dot marks the launchpad location.

The Australian rocket startup Gilmour Space on April 24, 2026 released the results of its investigation into the launch failure seconds after liftoff of its Eris rocket in July 2025.

Our investigation found that approximately nine seconds after ignition, one of the four first-stage hybrid rocket motors experienced a loss of thrust. A second motor exhibited similar behaviour at around 17 seconds, reducing vehicle performance and bringing the mission to an early end.

Analysis identified two independent failure modes originating from the oxidiser pump subsystem. Electrical and thermal faults were observed in the electric pump motors and associated inverters, including components sourced from an external supplier. We now have a clearer understanding of the underlying causes.

The company hopes to try again later this year, but to do so it will need license approval from Australia’s bureaucracy, and such approvals have not been quick.

Hat tip BtB’s stringer Jay.

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Two space station startups strengthen their positions

11:17 am

The American space stations under development

The startups building the commercial space stations Haven-1 and Starlab this week made deals that will further strengthen their positions both to win future NASA contracts while also making their own operations more functionally viable.

First, Vast, which hopes to launch its Haven-1 single module demonstration station next year and follow it up with its full Haven-2 station (as shown to the right), signed a deal with former NASA astronaut Sunita “Suni” Williams, making her the fifth astronaut to join the company’s astronaut advisory committee.

Former NASA astronaut and U.S. Navy Captain Sunita “Suni” L. Williams has joined Vast as an Astronaut Advisor. She joins Vast’s esteemed group of Astronaut Advisors led by Lead Astronaut Andrew Feustel, including Garrett Reisman, Megan McArthur, and former JAXA astronaut and Vast Japan General Manager Naoko Yamazaki.

It is clear each one of these former government astronauts sees the possibility of flying again to Vast’s Haven-1 station, which the company hopes to have occupied four times for two weeks during its three year mission. They are also hoping to be part of the much larger Haven-2 station to follow.

Vast in turn is now assembling a staff of very experienced professional astronauts it can use to lead all these proposed missions.

Next, Voyager Technologies, the lead company in the consortium building the single-module large Starlab station that will launch on Starship, signed an agreement with Yonsei University in Seoul, South Korea. While initially the deal will have the university do research at Voyager’s research facility in Ohio, it also lays the groundwork for the univesity to eventually get access on Starlab, once launched.

For Voyager this deal helps show NASA that there is a real market for these private stations, something NASA administrator Jared Isaacman has expressed doubts about.

In my rankings below of the five stations under development, the first three stations remain essentially tied for first place.
» Read more

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SpaceX launches 25 more Starlink satellites

10:08 am

SpaceX this morning successfully placed another 25 Starlink satellites into orbit, its Falcon 9 rocket lifting off from Vandenberg Space Force Base in California.

The first stage completed its 15th flight, landing on a drone ship in the Pacific.

The leaders in the 2026 launch race:

50 SpaceX
23 China
8 Russia
6 Rocket Lab

For the third straight year SpaceX continues to lead the entire world combined in total launches, 50 to 42.

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Indian rocket startup Skyroot now shipping its Vikram rocket to launch site

9:54 am

The Indian rocket startup Skyroot has now finished assembling its Vikram-1 rocket, and is about to ship it to its launch site at the Sriharikota spaceport on the east coast of India.

At Sriharikota, the rocket moves into final assembly and a round of system checks before a launch window is locked in the coming months. This is the last stretch before liftoff. Countdown operations, testing and integration now shift fully to the launch site.

One of the company’s founders said the most critical testing has been completed, with launch campaign activities set to begin at the spaceport.

The company is presently targeting a launch in June. If Vikram-1 reaches orbit successfully, Skyroot would become the first Indian private company to design, build, and launch its own rocket, and would be well positioned to win launch contracts from smallsat companies, competing directly with Rocket Lab and its Electron rocket.

This success would also help accelerate the Modi government’s effort to transition from a space industry controlled entirely by its government space agency ISRO to a private industry run by competing indepedent companies.

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Why is Sierra Space’s Dream Chaser spacecraft not ready for flight?

9:39 am

In a press release posted last week Sierra Space proudly announced that its Tenacity Dream Chaser mini-shuttle has completed its pre-launch ground vibration tests at the Kennedy Space Center in Florida, but instead of moving the mini-shuttle to a local facility where it could be integrated with its rocket for launch, the company announced it was shipping it back “to Colorado for final modifications and mission-specific upgrades.”

Normally when a spacecraft, satellite, or any payload passes these last ground tests, it is ready for launch, and it immediately begins integration onto the rocket that will carry it into space. That Sierra Space is not doing this strongly suggests Tenacity did not pass with flying colors, and that some issues were identified that need correction.

Note too that this spacecraft had been delivered for these tests in early 2024, and had been expected to pass them then and be launched that year. Instead, months passed with no word, then its launch was postponed indefinitely, and then NASA canceled Sierra’s contract to provide cargo to ISS.

Now, two years later Tenacity is still not ready for launch. Though the company says the ground tests are now complete, I suspect otherwise. I suspect there is some fundamental issue with the spacecraft that they are hiding because to reveal it would be devastating to Sierra’s public reputation.

Until we know more however this is pure speculation on my part. What we do know however is that this mini-shuttle has not done what was promised, and increasingly appears to be a lemon that will never do it.

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Two launches today, by China and Russia

3:30 pm

Both China and Russia completed launches today. First China put a Pakistani Earth observation satellite into orbit, its Long March 6 rocket lifting off from Taiyuan spaceport in north China. China’s state-run press made no mention of where the rocket’s lower stages, using very toxic hypergolic fuels, crashed inside China.

Next Russia launched a Progress cargo capsule to ISS, its Soyuz-2 rocket lifting off from Baikonur in Kazakhstan. The freighter will dock with ISS in two days.

The leaders in the 2026 launch race:

49 SpaceX
23 China
8 Russia
6 Rocket Lab

For the third straight year SpaceX continues to lead the entire world combined in total launches, 49 to 42.

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Soyuz launch site destroyed at French Guiana

9:56 am

As promised, the Soyuz-2 launch site at France’s French Guiana spaceport was destroyed in a controlled explosion yesterday.

I have embedded video of the explosion below.

The remaining infrastructure at the site—including the assembly and testing complex, railway lines, liquid oxygen storage facilities, and fueling systems—will be transferred to MaiaSpace, a French startup affiliated with Arianespace. The company plans to reuse up to 80% of the existing infrastructure for its own launch vehicle program.

MaiaSpace is not “affliated with Arianespace.” It is a wholly owned subsidiary of ArianeGroup, the company that makes the much larger rocket Ariane-6. The company hopes MaiaSpace’s smaller Maia rocket can capture some of the smallsat business presently owned by Rocket Lab and SpaceX.

The Russians had almost a dozen launches scheduled from this launchpad, worth more than a billion dollars in revenue, when Putin decided to invade the Ukraine in 2022. Russia immediately became a pariah to the rest of the work. That revenue instantly vanished and the companies found other launch providers.

Europe meanwhile gave control of French Guiana back to France, which owns it. France in turn has now been leasing out the unused launchpads there to new rocket startups. Though some pie-in-the-sky academics lobbied to preserve the Soyuz launchpad for “historical reasons”, the French had no desire to do so. Better to make money.
» Read more

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China launches another “set of test satellites promoting internet technology”

8:30 am

China today successfully placed what its state-run press described merely as “a new set of test satellites promoting internet technology”, its Long March 2D rocket lifting off from its Xichang spaceport in southwest China.

No word on where the rocket’s lower stages, using very toxic hypergolic fuels, crashed inside China. The state-run press did add this about the payloads:

These satellites will be mainly used to carry out technology tests and verifications, including direct satellite-to-phone broadband connectivity and space-ground network integration.

The leaders in the 2026 launch race:

49 SpaceX
22 China
7 Russia
6 Rocket Lab

For the third straight year SpaceX continues to lead the entire world combined in total launches, 49 to 40.

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Isaacman before Congress: Speaking the truth to power

1:24 pm

Jared Isaacman at House hearing yesterday
Jared Isaacman at House hearing yesterday

There has been a lot of attention given by the propaganda press to the testimony yesterday by NASA administrator Jared Isaacman before the House Science Committee, with almost all of that coverage focused on two issues, Trump’s proposal to cut NASA’s budget significantly, and the public statement by Isaacman that two Lunar Gateway modules were delivered “corroded.”

On the corrosion issue, much of the press focused on whether Isaacman’s statement is true (contractors are denying it). I instead was struck by how little pushback there was overall from Congress about Isaacman’s proposal to cancel Gateway entirely. In two hours of testimony, only one congressman brought it up, and even he did not challenge Isaacman’s decision very strongly.

Put simply, it really didn’t matter whether these modules were corroded or not. Congress is not going to challenge Isaacman on this decision. Some politicians might use it in fund-raising letters or at press events as a hammer to win votes or donations, but when it comes time to approve NASA’s budget, they are willing to accept Isaacman’s overall judgment. Gateway will be gone.

As for the budget cuts, I was also struck by the lack of hard opposition from Congress, despite reporting from the propaganda press (like this story) suggesting the cuts were rejected outright. Though repeatedly Isaacman was questioned about those cuts — especially from Democrats — repeatedly he fought back hard, to good effect. He supports Trump’s cuts and does not want more money, because in reviewing NASA’s budget and recent actions, he has found there is ample cash available in Trump’s reduced budget by simply shutting down bad or duplicative projects and focusing his resources more effectively.

The only threatened program that seemed to generate any passion from Congress was Trump’s effort to eliminate NASA’s education STEM program. “We need this program to inspire kids!” they would say. Isaacman would bluntly respond “No we don’t,” noting that NASA issues millions in education grants outside that program (making that program duplicative and unnecessary), and that the best way NASA can inspire kids is to actually fly missions, not send money to some bureaucratic program. Isaacman wants to use that money to make building the lunar base more likely.

Over and over again Isaacman pulled the rug out from under this big-spending congress critters by simply pointing out the truth to them, with one exchange with Zoe Lofgren (D-California) quite typical. She clearly was opposed to Trump’s cuts and wanted to challenge any cancellations being put forth. To do so, however, she wanted Isaacman to provide more detailed information about those cuts. Issacman said sure, I’m glad to provide you everything you want, but then added this:
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ESA: Full-sized model of its Space Rider reusable capsule is ready for landing drop tests

10:08 am

Artist rendering of Space Rider in orbit
Artist rendering of Space Rider in orbit. Click for original.

My heart be still! The European Space Agency (ESA) yesterday announced that a full-sized model of its Space Rider reusable capsule is now ready for landing drop tests from a helicopter.

The avionics – Space Rider’s ‘brain’ – were installed in the second week of March. This computer hosts the Guidance, Navigation and Control algorithms that will steer the parafoil, adapting to the wind – including any gusts– to guide Space Rider to a soft landing.

Roughly the size of a mini-van, the drop-test model is a full-size stand-in for the 4.6-m long reentry module, Space Rider lands on skis with the landing gear permanently open on this model as the mechanism is not part of the drop test.

To get an idea how unserious ESA is, we need to review this project’s overall schedule. This reusable capsule concept — which appears to be a variation of either Varda’s returnable capsule or Boeing’s X-37B — was first tested by ESA in 2015. By 2017 the agency was promising it would be flying commercially by 2025. A decade later and they have not yet begun testing a full scale spacecraft.

And the development pace now is glacial. Last summer ESA did helicopter drop tests of just the “brain” and parafoil. It is now going to do those drop tests again, a year later, with this full scale model. Expect another year to pass — at a minimum — before it tries another set of helicopter drop tests, this time with the first actual Space Rider capsule.

At this pace, Space Rider might fly by 2030, maybe. In the meantime, expect at least a half dozen private capsules to fly commercially, for profit. Following Varda’s success investment capital has poured into this industry. All will go from a blank sheet of paper to a flight model in less than five years.

And even if ESA finally gets Space Rider operational, it has established some very complex rules about who can use it commercially, rules so complex I predict few will be interested.

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Russia launches the smallest version of its Angara rocket

9:34 am

Russia today successfully launched the smallest version of its Angara rocket, dubbed Angara-1.2, from its Plesetsk spaceport in northeast Russia, placing a number of classified payloads into orbit.

Russia’s state-run press released almost no information about this launch, partly because of its military nature but also because it has discovered recently that the Plesetsk spaceport is within range of Ukrainian drones, with one attack causing a launch to be scrubbed.

The leaders in the 2026 launch race:

49 SpaceX
21 China
7 Russia
6 Rocket Lab

For the third straight year SpaceX continues to lead the entire world combined in total launches, 49 to 39.

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China picks two Pakistanis to train for a future Tiangong-3 mission

9:22 am

As part of its Soviet-style propaganda effort to promote its space program, China yesterday announced the names of the two Pakistanis who will train for a future short mission to its Tiangong-3 space station.

The agency said in a statement that Muhammad Zeeshan Ali and Khurram Daud will come to China soon as reserve astronauts for training. After completing all training and evaluations, one of them will participate in a space mission as a payload specialist, becoming the first foreign astronaut onboard the Tiangong space station.

This flight is part of Pakistan’s partnership with China in its International Lunar Research Station (ILRS) project to build a lunar base, created by China to counter the U.S.’s Artemis Accords alliance. Pakistan will also fly a small demo rover on China’s Chang’e-8 unmanned lunar mission, scheduled presently for a 2029 launch.

While the American alliance has now signed 63 nations covering most of the world’s major nations, only thirteen nations and about eleven eleven academic or governmental bureaucracies — mostly third world — have joined China.

This Chinese international manned mission mirrors largely what the Soviets would do during the Cold War, flying someone from one of its captured countries to garner international propaganda points. Do not expect these astronauts to do much concrete work. During the Soviet era, the Russians would joke that these foreign astronauts would all get “red hands” disease, caused whenever they tried to touch anything and a Russian astronaut would then slap their hands, saying firmly “Don’t touch that!”

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