Tag: engineering

An icy Martian crater filled with brain terrain

11:42 am

An icy Martian crater filled with brain terrain
Click for original image.

Cool image time! The picture to the right, rotated, cropped, and reduced to post here, was taken on March 26, 2026 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It shows what the scientists label an “ice-rich crater fill.”

And yup, that’s what we got. The floor of this 2.8-mile-wide unnamed crater is filled with what planetary scientists have labeled brain terrain, a feature found only on Mars that they associate with the sublimation of near surface ice, but as yet do not fully understand its entire formation process. In the upper right is a full resolution inset of that brain terrain, to give a good sense of its strange nature.

On that floor there are also several small fresh impact craters, as well as older small impacts that have faded almost to obscurity due to that mysterious process forming the brain terrain.

Its iciness of the terrain is also indicated by the rim of the crater, which is distorted as well as blobby. At impact or subsequently the ground here was soft like mud, and thus easy to shape into these cushioned features. Thus, though the rim was almost certainly circular after impact, time and the muddy nature of this ground allows it to get bent and warped.

Nor is it surprising there is near surface ice at this location. We are at 41 degrees south latitude, well away from the dry Martian tropics. This picture simply provides more evidedence that once you get above 30 degrees latitude, it will not be hard to find water on Mars.
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New long term analysis of solar activity suggests the Sun is undergoing some form of internal structural change

9:36 am

Sunspot activity for the past two cycles
NOAA’s chart of sunspot activity.
Click for the most recent update.

The uncertainty of science: Scientists doing a new analysis of more than forty years of solar data have concluded that some form of “subsurface structural changes associated with successive 11-year [sunspot] cycles” are taking place, with those changes “ever more progressively confined just beneath the solar surface.”

Using almost 40 years of helioseismic data from six telescopes around the world in the Birmingham Solar Oscillations Network (BiSON), the researchers uncovered a gradual change in structure just beneath the surface that has spanned multiple cycles, with the current solar cycle 25 showing particularly strong signatures of these changes.

Lead author Professor Bill Chaplin, from the University of Birmingham, said: “The Sun has its own ‘active biorhythm’ creating rising and falling magnetic activity that shapes space weather. However, traditional surface measures don’t capture the full story – that the Sun may be entering a different mode of behaviour unfolding over decades.

“We have uncovered evidence of systematic changes in the solar activity cycle. Crucially, magnetic activity is becoming more tightly confined near the surface with each cycle.”

The confinement appears to be within the first 600 miles below the surface, which for the Sun is barely skin deep.

In reading the paper [pdf], it is very clear they have detected these changes, but are as yet unable to apply them to any larger fundamental processes. They are observing the Sun change, but don’t know why. It could be simply random fluctuations of behavior, or it could be part of the Sun’s normal behavior related to its magnetic field and the nuclear fusion that makes it burn.

In either case, this lack of deeper understanding means it is impossible as yet to predict what will happen next, or how those future changes will impact us here on Earth.

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New study using Chandrayaan-2 data again suggests ice in crater near Moon’s south pole

9:06 am

The Moon's south pole region

The uncertainty of science: A new study by scientists in India using data from the Indian lunar orbiter Chandrayaan-2 has once again found evidence strongly suggesting the existence of water ice in several permanently shadowed craters near Moon’s south pole.

The findings are based on observations made by the Chandrayaan-2 orbiter’s Dual Frequency Synthetic Aperture Radar (DFSAR), a sophisticated microwave imaging instrument capable of probing beneath the lunar surface.

Among the craters examined, scientists found particularly strong evidence of subsurface ice in a 1.1-kilometre-wide crater located within the larger Faustini crater near the Moon’s south pole. Researchers said the crater displayed a distinctive “lobate-rim morphology”- a flow-like structural pattern that may indicate the impact event penetrated an ice-rich subsurface layer.

On the map above the green dot to the right of the south pole marks the location of the small crater inside Faustini Crater. Their conclusions were based first on microwave data suggesting subsurface ice, and second on the lobate shape of this crater’s rim, which has a kind blobby look implying the material is muddy and impregnated with ice.

Increasingly the data from all sources seems to suggest that if there is ice in these permanently shadowed craters, it is likely impregnated in the soil, and will require processing to extract.

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FAA grounds Starship/Superheavy pending completion of SpaceX’s investigation

8:01 am

According to an announcement yesterday by the Federal Aviation Administration (FAA), Starship and Superheavy are presently grounded pending the completion of SpaceX’s investigation of the engine failures in the Superheavy booster.

After a thorough assessment of the operation, the FAA has determined the May 22 SpaceX Starship Flight 12 launch resulted in a mishap. The mishap involved the Super Heavy booster as it flew back to the Gulf of America after stage separation. There are no reports of public injury or damage to public property. 

The FAA is requiring SpaceX to conduct a mishap investigation. The FAA will oversee the SpaceX-led investigation, be involved in every step of the process, and approve SpaceX’s final report, including any corrective actions.

The propaganda press will make of more this than it should. Based on the FAA’s procedures since Trump took over from Biden, the agency is not going to slow things down. It mostly just observes closely the investigation after any mishap, and as soon as the company is itself satisfied with the solution and has instigated its planned fixes, the FAA issues its stamp of approval and allows flights to proceed immediately.

For example, it acted in this manner for the Starship/Superheavy tests in 2025. It also did the same for Blue Origin in its investigation of its recent New Glenn failure. In both cases there were no delays waiting for the agency to retype the company’s conclusions. The approval was immediate. Expect the same now.

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Space Force awards SpaceX $2.29 billion contract for military data constellation

9:13 am

In what is intended as an upgrade to the Starshield military variation of SpaceX’s Starlink constellation, the Space Force yesterday awarded SpaceX a $2.29 billion contract to launch a “data transport constellation in low Earth orbit (LEO) for the Space Data Network (SDN), which the service is developing as its central communications network to link sensors to shooters.”

Under the Other Transaction Authority agreement, the company is to deliver “a fully operational prototype capability by the end of 2027,” Space Systems Command (SSC) said in a press release.

The SDN Backbone, formerly known as MILNET and based on SpaceX’s Starshield militarized variant of its commercial Starlink constellation, will serve as the backhaul data transport layer for the broader SDN. While the award to SpaceX is thus not a surprise, the size of the contract is.

It appears that the Pentagon has been so satisfied with its use of both Starlink and Starshield that it was quite willing to give SpaceX this new larger contract.

The good part of this story is that SpaceX is providing good service to the American people, through the Pentagon. The bad part of this story is that it is getting so little competition from the rest of the aerospace industry. This was work that Amazon could have won, had its Leo constellation been operational and competitive. It is not, as yet, and so it loses business. As the saying goes, “He who hesitates is lost.” And sadly a lot of old and even new aerospace companies have been hesitating.

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A review of what happened and what’s next for Starship/Superheavy

8:06 am

Link here. This article is a very nice and thorough review of what happened during SpaceX’s 12th test flight of Starship/Superheavy last week. What I like about it most is that it outlines what happened with very little speculation. No one outside of SpaceX is in a position to do this properly, and some speculation has been I think over the top. The article at the link avoids this.

It also provides a quick and reasonable summary about what is likely to happen next:

Next up will be Booster 20 and Ship 40 for Flight 13. This mission may launch in the July-August timeframe, pending testing and any mitigation efforts relating to the issues found during Flight 12. The launch pad appears to be in good shape, removing it from being a potential bottleneck to Booster 20’s Static Fire test, although that is not expected for weeks.

The article also provided this added news item that SpaceX revealed during last week’s test flight that has mostly fallen under the radar among news outlets (including here):

SpaceX also revealed plans for a lunar Starlink constellation using laser-linked relay satellites and confirmed that Fram2 commander Chun Wang has signed up for Starship’s first crewed interplanetary mission — a two-year Mars flyby. Wang will first fly with Dennis and Akiko Tito on the previously contracted crewed lunar flyby, potentially as early as 2034.

That’s two Starship missions apparently paid for by Wang, one around the Moon followed by a Mars fly-by. With the lunar fly-by targeting 2034, the Mars fly-by is likely a decade away, at the earliest.

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German rocket startup signs deal with Nova Scotia spaceport

7:50 am

Proposed Canadian spaceports
Proposed Canadian spaceports

The German rocket startup Isar Aerospace, which has not yet had a successful launch, has now signed a launch agreement with Maritime Launch Services, the company that has been trying to create a spaceport in Nova Scotia for more than a decade without success.

Space company Isar Aerospace and Spaceport operator Maritime Launch Services (MLS), have signed a Letter of Intent to advance sovereign orbital launch readiness from Nova Scotia, Canada. The agreement brings together Isar Aerospace’s orbital launch system and MLS’s launch site, Spaceport Nova Scotia, which is strategically located for launches to support reliable access to mid- to high-inclination and polar orbits for Earth observation and communication satellites and constellations, supporting commercial and government missions

Isar’s Spectrum rocket failed seconds after launch in its first attempt in 2025, launching from Norway’s Andoya spaceport. Since January the company has tried again several times but was forced to scrub each time. At present the launch is tentatively scheduled for June.

MLS’s history is even more convoluted. Initially a decade ago it partnered with a Ukrainian rocket company to offer launch services at Spaceport Nova Scotia. After years of delays that deal ended for good when Russia invaded the Ukraine. Since then MLS has tried to interest both satellite and rocket companies, all to no avail. This new deal was probably made possible due to financial help from the Canadian government, which in March 2026 signed a 10 year deal with MLS worth $200 million, with the intent to encourage a “sovereign orbital capability” for Canada. Since there are no rocket companies in Canada capable of doing this, it appears that capability will now come from Germany.

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NASA outlines new program of unmanned missions to Moon

2:15 pm

NASA's Moon base plans as of May 2026
NASA’s Moon base plans as of May 2026.

NASA officials today outlined its new reshaped program of unmanned missions to Moon, designed it says to lay the first groundwork for the manned lunar base to follow.

You can watch the press conference here. The map to the right comes from one viewgraph during that conference, and apparently shows the planned lunar base area, which officials said could cover about 100 square miles. Though officials said this is in the south pole region, I have not been able to identify the precise location, using the global map produced by Lunar Reconnaissance Orbiter. The large crater northeast of the base does not appear to be Shackleton Crater.

The schedule includes four already planned missions, two new missions awarded to Blue Origin in a $188 million contract to deliver two new rovers, and a new hopper mission mission to be delivered by Firefly’s Blue Ghost lander. The schedule is as follows:
» Read more

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Colorful Martian dunes

12:00 pm

Colorful Martian dunes
Click for original image.

Cool image time! The picture to the right, cropped to post here, was taken on March 15, 2026 by the high resolution camera on Mars Reconnaissance Orbiter (MRO).

The science team labels the image a “dune field.” What struck me immediately however was the vast range of colors, something that is usually not seen on Mars. Within a very short distance we go from bright orange to dark blue, with the change sometimes exceedingly sharp.

The orange is likely coarser rocks or bedrock, while the dark blue patches are likely piles of sand that has piled up due to prevailing winds. Why the dunes on the upper plateau change from bright orange to dark blue however is an unknown.

And why the patches of dust remain undefined is also a mystery. Dust on Mars is generally organized into dunes by the wind. It isn’t here.
» Read more

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NASA approves lunar habitation module design from Italy’s space agency

10:06 am

While the American company Redwire appears in the lead to win a European contract to build its lunar lander’s robot arm, it appears the Italian Space Agency (ASI) has gotten NASA’s preliminary approval to begin work on its Multi-purpose Habitation module (MPH) for the lunar base.

The Italian Space Agency [ASI] announced on 22 May that its Multi-Purpose Habitation (MPH) module had been cleared by a NASA review board to progress toward a Preliminary Design Review in 2027. The first MPH module is expected to launch in 2033.

…With the successful completion of the SDR [System Definition Review] and SRR [System Requirements Review], ASI and Thales Alenia Space can now prepare for the Preliminary Design Review (PDR), which will assess whether the module’s preliminary design is mature enough to meet NASA’s requirements before the programme advances into detailed design and hardware development.

It should be noted that the MPH appears to be a revision of the habitable module that ESA and Thales Alenia were building for the now dead Lunar Gateway station. This new deal is likely NASA’s effort to give ESA comparable work to make up for the loss of its Gateway contribution.

At the same time, ASI will face heavy competition from American companies for this work, as it isn’t the only one proposing habitable modules for the American lunar base. In March 2026 Voyager Technologies and Max Space announced a partnership to build their own inflatable habitable lunar modules. Just as ESA can only make rare exceptions when it gives work to American companies, NASA is obliged to do the same with its European contracts.

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Redwire completes testing on robot arm prototype for ESA

9:45 am

The European division of the American space manufacturing company Redwire last week delivered to the European Space Agency (ESA) a full developed and tested robot arm prototype, as per a 2024 contract.

The project is being led by Redwire’s Luxembourg team, which recently completed several project milestones including preliminary design and performance assessment.

Before successful delivery, the MANUS Breadboard Model underwent a comprehensive test campaign to verify the functionality and performance of the manipulator and tool-changer subsystems, and to demonstrate operational scenarios aligned with system requirements. All planned operations, including payload handling, end-effector actuation with wireless data and power transfer, range extender manipulation, and automatic deployment, were executed successfully, confirming overall system readiness. Functional testing validated safe and reliable mechanical performance, demonstrating strong joint-space accuracy and stable interaction among subsystems.

The arm is intended for ESA’s Argonaut lunar lander, allowing it to unload cargo from the lander to the lunar surface. ESA’s 2024 development contract was issued to both Redwire and the Polish company PIAP. PIAP however has not even built the actual prototype. It appears ESA is now moving forward on the full contract phase for the entire rover, and it appears Redwire’s Luxembourg division is in the best position to win the robot arm contract portion.

Not surprisingly, Redwire’s stock surged by 24% following this announcement.

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Voyager wins $16.5 million DARPA contract to give solid-fueled rockets variable thrust

9:29 am

The space station startup Voyager Technologies announced today that DARPA has awarded it a $16.5 million contract to develop a technology for use by all solid-fueled rocket manufacturers that will allow those rockets to have variable thrust while firing.

Until now, once you light a solid-fueled rocket motor (SRM) it works like a firecracker, burning at the same high thrust until it runs out of fuel. The goal is to introduce ways to change that thrust along the way, if need be.

During the 20-month contract, Voyager will combine its expertise with complex system modeling and controls with the propellant and manufacturing specialized to develop and validate proof-of-concept systems, culminating in tailorable SRM hot-fire demonstrations.

The program also focuses on manufacturing scalability and post-manufacturing control architectures, including the integration of structural health monitoring systems to support real-time health monitoring and performance. These activities are intended to prepare the technology for rapid industrial transition across multiple weapon systems, enabling flexible weapons procurement and large-scale production and stockpiling.

The vagueness in this description likely comes from two reasons. First, the technology is likely difficult and still uncertain. Two, when developed this technology is certainly going to be classified, since solid-fueled rockets are used extensively by the War Department in missiles. It will be made available to multiple American manufacturers, but only to them.

Whether this technology can become operational in less than two years remains a large question. We shall see. Nonetheless, as a company Voyager continues to expand its reach, diversifying its effort beyond its Starlab space station.

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SpaceX launches another 24 Starlink satellites

9:11 am

SpaceX this morning successfully launched 24 more Starlink satellites, its Falcon 9 rocket lifting off from Vandenberg Space Force Base in California.

The first stage completed its sixth flight (32 days after its previous flight), landing on a drone ship in the Pacific.

The leaders in the 2026 launch race:

62 SpaceX
29 China
8 Russia
7 Rocket Lab

For the third straight year SpaceX leads the entire world combined in total launches, 62 to 52.

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An outcrop of many parallel layers on Mars

1:52 pm

An outcrop of many parallel layers on Mars
Click for original image.

Cool image time! The picture to the right, rotated, cropped, and reduced to post here, was taken on March 11, 2026 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). The picture has been rotated so that north is to the top.

The science team describes this feature as “dark linear ridges.” Apparently the ground at this location at some point in the past tilted upward, exposing these layers and creating this 250 to 400 foot high escarpment facing south. What makes this even more intriguing is the ground was only uplifted in this one area. If you look at the full image you will see that the surrounding terrain is flat and relatively featureless.

The location is in the high southern latitudes in the Martian cratered highlands. Thus, it is likely that there is some near surface ice in these layers, and in fact the many Martian climate cycles produced by the wide swings in the planet’s rotational tilt likely contributed to making the layers themselves.
» Read more

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The geology of the Moon’s far side, revealed in pictures taken during Artemis-2

9:04 am

A sample of Andrew McCarthy's work
A sample of Andrew McCarthy’s work. Click for original.

When Artemis-2 commander Reid Wiseman took pictures as his Orion capsule swung around the far side of the Moon, he did so as per the instructions of astrophotographer Andrew McCarthy, thus producing enhanced-color photographs capable of distinguishing the lunar geology with more detail.

Astrophotographer Andrew McCarthy is known for turning the moon into something it decidedly isn’t to the naked eye; a colorful, mineral-rich landscape that looks more like a geological survey than the grey orb hanging in the night sky. His technique relies on stacking hundreds or thousands of images together to suppress noise and amplify the subtle spectroscopic differences between different surface materials. The result is both scientifically accurate and visually arresting.
Linking up with Artemis

As Space.com details, just weeks before the Artemis II launch window, McCarthy DM’d mission commander and NASA astronaut Reid Wiseman with a proposal: could Wiseman shoot the moon the same way McCarthy shoots the moon? It turns out he could. “He was immediately onboard,” McCarthy said. “It was a dream come true, obviously, for me, but I saw it as this very unique opportunity.”

McCarthy worked up a plan alongside Wiseman and NASA’s lunar photography team, the same group that had trained the Orion crew on their camera kit. As regular readers will already know, the primary workhorse was a Nikon D5 DSLR paired with an 80–400 mm Nikkor lens, a decade-old body chosen specifically for its exceptional high-ISO performance. Wiseman shot burst sequences at varying exposures throughout the flyby, generating a dataset McCarthy could stack back on Earth.

The picture to the right is a small sample of McCarthy’s work.

Hat tip to reader Ferris Akel.

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SpaceX launches 29 more Starlink satellites

8:38 am

SpaceX early this morning successfully placed another 29 Starlink Satellites into orbit, its Falcon 9 rocket lifting off from Cape Canaveral Space Force Station in Florida.

The first stage (B1078) completed its 28th flight, landing on a drone ship in the Atlantic, 64 days after its previous flight. With this flight, the booster moves into a tie for seventh place with the Columbia shuttle and another Falcon 9 booster in the rankings of the most reused launch vehicles:

39 Discovery space shuttle
34 Falcon 9 booster B1067
33 Atlantis space shuttle
33 Falcon 9 booster B1071
32 Falcon 9 booster B1063
31 Falcon 9 booster B1069
28 Columbia space shuttle
28 Falcon 9 booster B1077
28 Falcon 9 booster B1078

Sources here and here.

The leaders in the 2026 launch race:

61 SpaceX
29 China
8 Russia
7 Rocket Lab

For the third straight year SpaceX leads the entire world combined in total launches, 61 to 52.

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NASA practically eliminates any Starliner flights before ISS retires

10:11 am

Starliner docked to ISS
Starliner docked to ISS in 2024.

In a procurement announcement on May 18, 2026, NASA added another three to six crewed flights to ISS to its contract with SpaceX, covering all missions possible through 2030, which in turn practically eliminates the possibility it will buy any manned flights on Boeing’s Starliner capsule.

In a May 18 procurement filing, NASA announced its intent to add six post-certification missions, or PCMs, to SpaceX’s commercial crew contract on a sole-source basis. The agency would order up to three of those missions at the time it added them, formally starting preparations for them.

…Adding six missions to the contract would cover three years of ISS operations, at a rate of one mission every six months. With the currently contracted missions, running through Crew-14, flying through the fall of 2027, the extension would provide coverage through late 2030, when the ISS is slated for retirement. NASA has previously stated the last crewed mission would likely spend a year at the station.

Though it is not stated yet exactly how much SpaceX will earn with these additional missions, based on previous contracts the revenue will likely range from $1 to $2 billion. Overall, SpaceX has probably received somewhere between $4 to $6 billion additional earnings that was supposed to go to Boeing.

Instead, Boeing is now out of the picture entirely, though NASA is being very coy about saying so. It will earn nothing from Starliner, at least in connection with hauling crews or cargo to ISS. And because its contract with NASA was fixed price and the company could not meet its final milestones to get the bulk of its payments, it will have cost the company about $2 billion beyond what NASA had paid it.

It remains unknown whether Boeing wishes to continue the project. NASA officials had suggested earlier this year that it would buy an unmanned cargo mission to ISS to give the company a chance to prove the capsule and get it certified for manned missions. They have since backed off from that plan, scheduling no Boeing missions through the rest of this year.

Though things could still change, it appears Starliner is dead. In history books this Boeing project I think will become the poster boy for the failures of the older big space companies that used to dominate America’s aerospace industry. By the 21st century they didn’t know how to budget, had poor quality control resulting in unreliable products, and designed things that were badly conceived. The result was a bankrupt space industry that was only saved when new companies appeared willing to fill a need these older companies could not.

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China launches three astronauts to its Tiangong-3 space station

9:21 am

China today successfully launched three astronauts to its Tiangong-3 space station, its Long March 2F rocket lifting off from its Jiuquan spaceport in northwest China.

The Shenzhou capsule docked with the station 3.5 hours after launch. The overall mission is planned as a standard six-month mission, though depending on how the crew fare one will continue and attempt to complete a yearlong mission.

China’s state-run press provided no information on where the rocket’s lower stages and four strap-on boosters (using extremely toxic hypergolic fuels) crashed inside China. That press however made a big deal about how one of the astronauts comes from Hong Kong, no longer free and now under the full thumb of the communist government.

The leaders in the 2026 launch race:

60 SpaceX
29 China
8 Russia
7 Rocket Lab

For the third straight year SpaceX leads the entire world combined in total launches, 60 to 52.

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FAA clears New Glenn for launch

12:18 pm

The Federal Aviation Administration (FAA) yesterday approved the results of Blue Origin’s investigation into the failure of the upper stage of the company’s New Glenn rocket to reach orbit on the rocket’s third launch in April 2026.

The Blue Origin tweet announcing this FAA decision provided little information, saying only this:

The FAA has approved our NG-3 report, and corrective measures have been implemented. Prior to our second GS2 [upper stage] burn, we experienced an off-nominal thermal condition, and, as a result, one of the BE-3U engines didn’t achieve full thrust to reach our target orbit.

Blue Origin says it is preparing for the next New Glenn launch, but provided no information about when. The company is under heavy pressure to up its launch rate, which compared to SpaceX, Rocket Lab, and ULA appears almost pitiful in its slowness. It had had a contract with Amazon to do 27 Leo satellite launches, but that total has been reduced to 24 due to the lack of launches. It is also unable to do any military launches until it flies New Glenn successfully four more times.

Getting New Glenn off the ground successfully and quickly is becoming critical for the company.

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One of the three Chinese astronauts to launch this weekend will do a yearlong mission

12:02 pm

The Tiangong-3 station, as presently configured
The Tiangong-3 station, as presently configured,
with two Shenzou capsules docked to its main hub.

Though the decision won’t be made as to who until the mission is ongoing, one of the three Chinese astronauts scheduled to launch this weekend to China’s Tiangong-3 space station will do a yearlong mission, rather than the standard six month missions that they have been doing since the station became operational.

Chinese astronauts Zhu Yangzhu, Zhang Zhiyuan and Li Jiaying (or Lai Ka-ying in Cantonese) will carry out the Shenzhou-23 crewed spaceflight mission. The astronaut selected for the year-long stay will be determined based on how the mission unfolds in orbit, CMSA spokesperson Zhang Jingbo said at a press conference.

During the year-long residency, China will implement its first space-based human body research program to collect crucial data on astronaut exposed to long-duration spaceflight environments, Zhang noted.

I guarantee this is the preliminary to a longer mission that will break the 14.5 month record set by Valeri Polykov on Russia’s Mir station in 1994-95. China’s station program is solid and robust, and even includes plans to double the size of Tiangong-3 in the coming years. There will be nothing preventing them from doing missions even longer, from two to three years, as they develop the knowledge for interplanetary travel.

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SpaceX completes a largely successful 12th orbital test flight of Starship/Superheavy

4:41 pm

Starship and Superheavy in flight

SpaceX today successfully completed its 12th orbital test flight of Starship/Superheavy, with Superheavy lifting off and getting Starship into its preliminary flight path and Starship then firing its engines and getting into a workable orbit that naturally decayed over the Indian Ocean.

There were issues with several Raptor-3 engines, being used in flight on both Superheavy and Starship for the first time. During launch one Superheavy Raptor-3 engines cut off prematurely, forcing the other 32 engines to compensate for the loss. Then, after stage separation (shown in the screen capture to the right) Superheavy’s boost back burn cut off prematurely. As a result, the booster did not come down off the coast for a soft vertical splashdown as planned, but came down in the Gulf, mostly uncontrolled. It did successfully fire some engines for the landing burn, but that splashdown was hard.

As for Starship, it also had one engine shut down prematurely, requiring the other five engines to burn about 90 seconds longer to get the ship up to an acceptable orbit. Because of these engine issues, the engineering team decided to forgo a test restart of one Raptor-3 engine.

Starship then successfully deployed 20 dummy Starlink satellites, followed by two operational Starlink satellites that were modified expressly to provide visual observations of Starship and its heat shield while it is space. Only a few minutes later engineers were able to broadcast those observations, showing Starship as seen from nearby.

Starship then successfully executed its planned maneuver leading to a soft splashdown in the Indian Ocean.

Overall this sets the stage for a quick follow-up. Expect new test flights over the summer and fall, coming almost monthly. The company has made it clear it wants to do a two-week refueling mission with two Starship before the end of the year, as well as begin using Starship to deploy the bigger upgraded Starlink version 3 satellites.

Though this flight did not complete a full orbit, the rocket got Starship into an acceptable orbital path, allowing it to do most of the orbital testing desired. I consider this a success for the 2026 launch race:

60 SpaceX
28 China
8 Russia
7 Rocket Lab

For the third straight year SpaceX leads the entire world combined in total launches, 60 to 51.

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Watching SpaceX’s 12th Starship/Superheavy orbital test flight

9:59 am

After yesterday’s scrub, SpaceX has now rescheduled the 12th test orbital launch of Starship/Superheavy for later today, with a launch window opening at 5:30 pm (Central).

The upcoming flight will debut the next generation Starship and Super Heavy vehicles, powered by the next evolution of the Raptor engine and launching from a newly designed pad at Starbase.

The flight test’s primary goal will be to demonstrate each of these new pieces in the flight environment for the first time, with each element of the Starship architecture featuring significant redesigns to enable full and rapid reuse that incorporate learnings from years of development and test.

I have once again embedded below several different live streams of the flight.
» Read more

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Starlab gets another investor

9:40 am

Starlab design as of December 2025
Starlab design as of December 2025

The consortium building the Starlab space station today announced that the investment firm 1789 Capital has made a “strategic investment” in the station’s construction, though neither would state the amount of that investment.

Starlab Space Stations and 1789 Capital announced 1789 Capital’s strategic investment in Starlab. The investment reflects mounting confidence that Starlab — the U.S.-led joint venture, next-generation commercial space station — represents a durable and commercially grounded cornerstone of the post-International Space Station (ISS) low-Earth orbit (LEO) economy.

…“America built the space age and must lead the next one,” said Omeed Malik, founder and president, 1789 Capital. “We invest in the next chapter of American exceptionalism, and Starlab is turning that vision into reality.” The firm’s investment in Starlab reflects its thesis that critical infrastructure — from the digital to the orbital — represents a generational opportunity where national interest and investor returns are aligned.

When asked, Starlab’s press office simply said “We are not disclosing the value at this time.” This has been the company’s policy when it comes to private investment. In January 2026 it announced another major investor without disclosing the amount invested.

Nonetheless, this new investment strengthens Starlab’s overall position, even if that support is tentative. In my rankings below of the five stations under development, Starlab, Vast, and Axiom remain essentially tied for first place..
» Read more

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Zvezda module on ISS is leaking once again

8:51 am

According to a report today at Ars Technica, the Zvezda module on ISS is once again leaking station air, despite recent repairs to the stress fractures in its hull that had appeared in recent months to halt the air loss.

After a couple of sources reported this to Ars, NASA confirmed the issue on Thursday. On May 1, after Russian cosmonauts unloaded cargo from the Progress 95 cargo spacecraft, Roscosmos noted a “slow pressure drop” in the PrK module.

“Teams performed data analysis, which indicated a loss of about one pound per day,” NASA spokesperson Josh Finch told Ars. “Roscosmos allowed the pressure in the transfer tunnel to gradually decrease while monitoring the rate. The area now is being maintained at a lower pressure, with small repressurizations as needed. There are no impacts to station operations, and NASA and Roscosmos are coordinating on next steps.”

A loss of one pound of air per day is comparable to the leak rate back in 2019, as shown in the lower right corner of the graphic below. It is also one third the loss rate seen for much of the following five years, which is I suppose good news.

Figure 3 from September Inspector General report
Figure 3 from September 2024 Inspector General report, showing Zvezda’s location on ISS, as well as the station’s leak rate at that time.

At the same time, it suggests once again that every docking to Zvezda puts stress on its hull, and apparently causes either new cracks or the reopening of old ones. In such a situation, a catastrophic failure of the module remains a possibility that cannot be dismissed. NASA closes the hatch between the Russian and American halves of the station whenever there is a docking, but that is only band-aid covering a much more serious problem.

Without question ISS’s life span is impacted by this issue. The sooner the U.S. can replace it with at least one or two of the private commercial stations under development, the better.

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Rocket Lab launches radar satellite for Japanese company Synspective

8:24 am

Rocket Lab early today successfully completed its ninth launch (out of a 27-launch contract) for the Japanese radar satellite company Synspective, its Electron rocket lifting off from one of its two launchpads in New Zealand.

The leaders in the 2026 launch race:

59 SpaceX
28 China
8 Russia
7 Rocket Lab

For the third straight year SpaceX leads the entire world combined in total launches, 59 to 51.

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Rocket Lab wins $90 million Space Force contract to build two geostationary satellites

8:01 am

Rocket Lab yesterday announced it has been awarded a $90 million contract by the Space Force to build two geostationary satellites for the military’s “space doman awareness” constellation.

Though Rocket Lab has built and launched a number of low Earth orbit (LEO) satellites for both commercial and military customers, these two satellites will be the first in geosynchronous orbit.

Rocket Lab will serve as prime contractor and end-to-end mission provider, responsible for spacecraft design and manufacture, integration of the in-house Heimdall optical payload produced by Rocket Lab Optical Systems, launch integration onto a government-furnished launch vehicle, and on-orbit operations for up to five years following commissioning. The two satellites will be built on Rocket Lab’s Lightning bus, adapted for the thermal, radiation, propulsion, and station-keeping demands of GEO.

Though Rocket Lab is mostly considered a rocket company, it has done an excellent job diversifying its capabilities so as to sell aerospace products across a range of areas. This contract continues that successful trend.

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Starship/Superheavy launch scrubbed at T-40 seconds

4:44 pm

Starship at that hold today
Starship at that hold today

Though SpaceX mission controllers tried several times to restart the countdown when it went into an automatic hold at T-40 seconds due to some technical issues, they eventually decided to scrub the Starship/Superheavy launch today.

At present they expect to try again tomorrow, with a launch window opening at 5:30 pm (central). Expect updates later today or tomorrow.

One trivia fact noted during today’s broadcast. With its new more powerful Raptor-3 engines, Superheavy produces about 18 million pounds of thrust at launch. That is more than twice that of either the Saturn-5 rocket (seven million pounds) or the SLS rocket (8.8 million pounds). And remember, everything about Starship/Superheavy is intended to be reused, with Superheavy already proving its ability to do so.

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An amoeba in space more than a light year in size

12:59 pm

An amoeba in space more than a light year in size
Click for original image.

Time for another cool image. The picture to the right, cropped and reduced to post here, was released today by the science team of the 8.1 meter Gemini North telescope on Mauna Kea in Hawaii. It provides a close-up view of the central blob that forms NGC 1514, a planetary nebula located about 1,500 light years away and nicknamed the Crystal Ball Nebula by Gemini’s PR team.

They might think it resembles a crystal ball, but to my eye this is an amoeba undulating in weightlessness.

Planetary nebulae form when a low- or intermediate-mass star ejects its outer layers near the end of its life, forming a somewhat spherical cloud of gas. They typically have smoother, spherical shapes, making the Crystal Ball Nebula unique for its bumpy shells of gas. As the central star casts away this gas, its inner core is exposed. Radiation from the core energizes the gas, giving it a scorching temperature and chromatic glow. The Crystal Ball Nebula, for example, has an estimated temperature of 15,000 K.

…While it may appear in this image as if there is a single shining light source at the heart of the Crystal Ball Nebula, as Herschel saw, it actually contains two stars. These two stars orbit each other with a period of around nine years — the longest known for any binary pair within a planetary nebula. Scientists believe that one of these stars, which was once several times more massive than our Sun, released its outer layers while in the throes of death. As the progenitor star and its binary companion orbit each other, they mold the expanding shell of gas with their strong, asymmetrical winds, forming the lumpy layers we see today.

The analogy I like to use for this process is that of a blender. The two stars act like the blender’s blades, mixing the outflowing gas from the stars into these spectacular shapes.

The Webb Space Telescope took its own infrared image of this nebula, and showed that its is surrounded by two larger rings of material, also expanding outward.

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