Tag: engineering

Japan to do test launch of its H3 rocket in June

1:28 pm

Japan’s space agency JAXA is now planning a test launch on June 10, 2026 of its H3 rocket, carrying a dummy payload only in order to test the changes it has made in the rocket after a failed launch in December 2025.

The failure of the eighth H3 rocket was likely caused by an adhesion problem in the satellite mounting structure, which led it to break apart during flight, according to an investigation by JAXA. Similar issues were found in other units, prompting the space agency to fix them so the components can maintain their structural integrity.

In the June launch, a dummy satellite will be mounted on the test vehicle to collect data and verify the effectiveness of the measures. For future launches of actual satellites or space probes, JAXA plans to review the mounting structure design to reduce the risk of failure.

In other words, the method for attaching the payload to the rocket at some points failed, so that the satellite separated prematurely. The June launch will be to test a new mounting system.

Posting has been light the last few days as I deal with recovery from knee surgery.

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Two launches by SpaceX

12:02 am

In the past two days SpaceX completed two more launches. The first, yesterday morning, placed 25 more Starlink satellites into orbit, its Falcon 9 rocket lifting off from Vandenberg Space Force Base in California. The first stage completed its 8th flight, landing on a drone ship in the Pacific.

Then tonight SpaceX launched a GPS satellite for the Space Force, its Falcon 9 rocket lifting off from Cape Canaveral Space Force Station in Florida. The first stage completed its 7th flight, landing on a drone ship in the Atlantic. That drone ship, “Just read the instructions,” is now being shifted to support Starship operations, and will no longer be used for Falcon 9, after supporting 155 first stage landings. What it will do in connection with Starship has not been made clear. The two fairing halves completed their 2nd and 3rd flights respectively.

The Space Force had originally intended to launch this satellite on a ULA Vulcan rocket, but a month ago it shifted the contract to SpaceX because of the nozzle problem that has plagued two different ULA Vulcan launches. Because of this shift, the time from contract award to launch was the quickest by SpaceX for the Space Force.

The leaders in the 2026 launch race:

48 SpaceX
21 China
5 Rocket Lab
5 Russia

For the third straight year SpaceX continues to lead the entire world combined in total launches, 48 to 36.

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NASA’s IG: With only Axiom building NASA’s future spacesuits, the agency’s lunar program faces great scheduling risk

12:23 pm

Axiom's two spacesuits being tested underwater
Axiom’s two spacesuits being tested underwater in October 2025.
Click for original.

According to NASA’s inspector general’s report today [pdf] on the state of NASA’s effort to create new spacesuits for use by its astronauts on future space stations as well as in its Artemis lunar program, the planned schedules for the lunar landing and those stations are threatened because the agency presently has only one contractor, Axiom, building new suits, and has not established any spacesuit standardization rules should it want to issue contracts to others. From the report’s conclusion:

While NASA is taking steps to mitigate schedule risk, it must also contend with the unique risks inherent to a single-provider environment until future competition is introduced. … If Axiom cannot satisfy its contractual requirements in a timely or cost-effective manner, then NASA could be forced to continue using the problematic EMUs throughout the life of the ISS and significantly adjust its lunar plans. [EMUs are the complex suits presently used on ISS, and would not work well for any lunar landing mission.]

While xEVAS [the new suit concept] is flexible enough to allow for additional providers, doing so may not help the Agency meet its more immediate Artemis goals. Critically, NASA must address existing design and safety risks resulting from the lack of standard requirements for spacesuits to be compatible with various lunar spacecraft and assets.

As shown by the photo above, the development of Axiom’s spacesuit has been proceeding, and seems likely to be available for next year’s Artemis-3 Earth orbit test mission. At the same time, it is still behind schedule, a fact that has been mitigated because NASA’s entire Artemis program is equally behind schedule.

The report lists three commercial companies that might be able to provide alternative suits, and thus some redundancy, as shown by the image below.
» Read more

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Hubble looks at the Trifid Nebula again

9:59 am

Trifid Nebula as seen by Hubble
Click for original image.

Cool image time! The picture to the right, cropped to post here, was taken by the Hubble Space Telescope and released today. It shows a small section of the Trifid Nebula, located about 5,000 light years away.

This location has been imaged numerous times in the past by Hubble. The area shown illustrates some fundamental aspects of stellar and nebula formation. The dark area in the lower right is a thick dust cloud. Several energetic O and B supermassive stars are out of view at the top. The radiation from these stars (indicated by the blue), is hitting that dust cloud and literally destroying it. It appears that the foreground “horn” exists because a larger object is blocking the radiation, allowing dust to survive in the background.

I have no explanation for the background “horn”.

This new image was taken in parallel with an image of the entire Trifid Nebula, taken by the new Rubin Telescope in Chile. Though Rubin cannot see with the same resolution as Hubble, its image is quite worthwhile viewing.

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New Glenn launches for 3rd time, reuses first stage and lands it, but fails to put satellite in correct orbit

11:54 am

New Glenn's first stage, just prior to landing
New Glenn’s first stage, just prior to landing

Blue Origin in the early morning hours today successfully completed the third launch of its New Glenn rocket, lifting off from Cape Canaveral Space Force station in Florida and placing in orbit AST SpaceMobile’s Bluebird-7 cellphone satellite. For Blue Origin, this launch was the first for a commercial outside customer, a significant step forward for the company, which has sadly earned a reputation for operating too slowly.

Unfortunately, according to an update from Blue Origin the satellite was deployed but in an “off nominal orbit.” An update just posted by AST states the satellite is a loss and is being de-orbited. This satellite would have been the seventh in AST SpaceMobile’s 45-60 satellite constellation designed to act as cell towers in space. AST hopes to have at least half the constellation in orbit by the end of ’26. Several major phone companies, such as AT&T, Verizon, and Vodaphone in Europe, have already signed on.

For Blue Origin, the launch wasn’t a total failure. The rocket’s first stage had flown in November 2025 on the second New Glenn flight, and was refitted (with a new set of engines) to fly again on this flight, the rocket’s third. It not only did its job, getting the upper stage into space, it successfully landed for the second time on New Glenn’s barge in the Atlantic. This fast reuse and successful landing should do a great deal to improve the company’s slow reputation. Unfortunately, the failure to deliver the customer’s satellite will counter that most significantly.

As for Blue Origin, this was its first launch in 2026, and it was also unsuccessful. The leader board for the 2026 launch race remains unchanged:

The leaders in the 2026 launch race:

46 SpaceX
21 China
5 Rocket Lab
5 Russia

For the third straight year SpaceX continues to lead the entire world combined in total launches, 46 to 36.

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EU releases revised Space Act proposal, and it is as odious as the earlier drafts

11:24 am

The European Union
This label would be more accurate if it read
“NOT made in the European Union”

The Council of the European Union (EU) in Brussels at the end of March released [pdf] a revised draft of its proposed Space Act that would impose a single regulatory framework for all space activities across the entire EU.

I have just finished reading this odious 157-page monstrosity, and I can say without question if passed it will not only isolate Europe from all international space commercial activity, it will squelch any possibility that Europe will develop its own space industry.

The first draft of the law, first put forth in 2025, was routinely blasted by American officials, by think tanks in and out of Europe, and by industry representatives. It imposed byzantine regulations on Europe’s space industry while also demanding that non-European companies be required to follow these rules as well, national sovereignty be damned.

The newly released draft does the same, but now does so in a manner that is somewhat vague and unclear.

That lack of clarity includes what is required to comply with the regulations. “There are a lot of things where it says you need to do X. What counts as X? Who knows,” said Gabriel Swiney, director of the Office of Space Commerce’s policy, advocacy and international division. “It will probably be determined at some point by some European committee or standards body.”

“Without regulatory clarity with what the regulatory picture should be, it’s really going to have a stifling effect on what industry is striving to do,” said Janna Lewis, senior vice president of policy and general counsel for Astroscale U.S.

The first draft was delayed and apparently rejected because the member nations of the EU opposed it. It appears this new version, having done nothing to ease their concerns, might already be on its way to the dead letter office.

We shall see. If there is anything dear to the hearts of the EU bureaucrats in Brussels, it is imposing insane regulations on others. It appears those bureaucrats haven’t given up — despite opposition by numerous European governments — and are working hard to win that right in space.

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Final ground testing begins of Katalyst’s Swift rescue spacecraft

5:46 am

Katalyst's proposed Swift rescue mission
Katalyst’s proposed Swift rescue mission.
Click for original image.

Only seven months after NASA awarded the satellite repair startup Katalyst the contract to save the Gehrels-Swift space telescope, the company has delivered the completed LINK spacecraft to the Goddard Space Flight Center in Maryland for final ground testing.

Katalyst will move forward with LINK’s vibration and thermal tests using NASA Goddard’s in-house facilities in the coming weeks before installation into Northrop Grumman’s Pegasus rocket at the agency’s Wallops Flight Facility in Virginia.

Gehrels-Swift has been one of NASA’s most productive space telescopes. Unfortunately its orbit is decaying and if nothing is done to raise that orbit it will burn up in the atmosphere in 2029 or so. To extend this timeline engineers have stopped almost all science work in February.

Katalyst hopes to launch LINK as soon as later this year. It was able to get it built so quickly because it was already under construction as the company’s first demo of its repair technology. When NASA put out a bid for boosting Swift, the company shifted gears and reconfigured LINK for this mission.

If successfully, the achievement will be a major coup for this startup.

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Engineers shut down another instrument on Voyager-1

5:31 am

The Voyager missions
The routes the Voyager spacecraft have
taken since launch. Not to scale.

Due to the continuing and expected decline in power, engineers have now shut down another instrument on Voyager-1 in the hope of keeping the spacecraft operating for just a few more years.

On April 17, engineers at NASA’s Jet Propulsion Laboratory (JPL) in Southern California sent commands to shut down an instrument aboard Voyager 1 called the Low-energy Charged Particles experiment, or LECP. The nuclear-powered spacecraft is running low on power, and turning off the LECP is considered the best way to keep humanity’s first interstellar explorer going.

The LECP has been operating almost without interruption since Voyager 1 launched in 1977 — almost 49 years. It measures low-energy charged particles, including ions, electrons, and cosmic rays originating from our solar system and galaxy.

…The choice of which instrument to turn off next wasn’t made in the heat of the moment. Years ago, the Voyager science and engineering teams sat down together and agreed on the order in which they would shut off parts of the spacecraft while ensuring the mission can continue to conduct its unique science. Of the 10 identical sets of instruments that each spacecraft carries, seven have been shut off so far. For Voyager 1, the LECP was next on that list. The team shut off the LECP on Voyager 2 in March 2025.

Both spacecraft now have only three operating science instruments. Engineers hope a major reboot on both spacecraft planned later this year might make each operate more efficiently, allowing both to survive maybe until 2030. At a minimum the hope is to make them last until 2027, which would the fiftieth anniversary of their launch.

The bottom line remains: the nuclear power source on board both is running down. The goal now is less gathering science data and more engineering: How long can we keep these spacecraft alive, at the very outskirts of our solar system?

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The space station startups: NASA’s new space station plan is mistaken

9:01 am

The American space stations under development

At a conference event this week officials from three of the five American space station startups expressed strong disagreement with NASA’s new space station plan.

The new plan would have NASA build and launch its own new core module, dock it with ISS, and have the new stations attach their first modules to it prior to flying freely. NASA proposed this plan because it does not believe there is enough market to sustain the stations independently and NASA doesn’t have the budget to fully fund them.

The officials repeatedly disagreed about the market issue.

“We believe not only we can be ready by 2030” when the International Space Station is slated to be retired, “but we also believe that we can be profitable on the current market, not waiting for the future market we all will develop and will be successful at,” said Max Haot, CEO of Vast [building the Haven-1 and Haven-2 stations].

…Haot and executives from Axiom Space and Starlab Space said their responses to NASA’s request for information — which were due April 8 — show otherwise. “We put in 390 pages of independent analysis, research studies, datas, contracts, those types of things,” said Marshall Smith, CEO of Starlab Space, which is targeting 2029 for its station to be on orbit. “We’re being very clear and what we can do and how that works.”

One prominent revenue stream the panelists pointed to is other space agencies and nations eager to send their astronauts and payloads to space. “We’ve flown 12 people to space that paid us money to do that,” said Jonathan Cirtain, CEO of Axiom Space, referring to the four private astronaut missions it’s conducted to ISS. “We’ve flown 166 payloads today. All of those are paying payloads that generate revenue for the company.” The Texas company plans to begin operating in 2028 when its first two station modules are slated to be in orbit, then gradually grow the station to five modules.

The officials also said the core module idea would actually slow things down. NASA would have to first build and launch it, and would be starting from scratch to do so. It takes years to build such a thing, and it will certainly not be ready by 2030, when ISS is presently supposed to be retired. Moreover, forcing them to dock to this module would force them all to completely change their own plans, something they all find counter-productive.

In announcing NASA’s core module plan, NASA administrator Jared Isaacman also stated that he was open to industry feedback. I suspect that his core module proposal is going to die, and be replaced with the more direct transition from ISS to these private stations, the approach these companies favor.

I should add that the three startups that spoke up at this conference are also the three that are in the lead to build their stations, according to my rankings below. As far as I can tell, they are all tied for first place, with their station development very robust and well financed.
» Read more

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Two launches since yesterday, by Russia and China

8:26 am

The launch beat goes on! Russia and China each completed launches since yesterday, with Russia first placing a classified military payload involving “multiple spacecraft”, its Soyuz-2 rocket lifting off from its Plesetsk spaceport in northeast Russia. The rocket’s flight path took it over the Arctic, so the core stage and four strap-on boosters fell harmlessly in the ocean.

Next, China placed what it claimed was a “high-precision greenhouse gas detection” satellite into orbit, its Long March 4C rocket lifting off from its Jiuquan spaceport in northwest China. China’s state-run press provided no other information. Nor did it indicate where the rocket’s lower stages, using very toxic hypergolic fuels, crashed inside China.

The leaders in the 2026 launch race:

46 SpaceX
21 China
5 Rocket Lab
5 Russia

For the third straight year SpaceX continues to lead the entire world combined in total launches, 46 to 36.

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The movement of surface ash on Mars over a half century

12:08 pm

Viking and Mars Express images side-by-side for comparison
Go here and here for original images.

Overview map

Cool image time! In comparing images of one location on Mars taken a half century apart, scientists using Europe’s Mars Express orbiter have discovered that the dark ash covering this region has shifted south by about 200 miles.

The two images above show the change, with a Viking orbiter image taken sometime in 1976 on the left and the Mars Express image taken in 2026 on the right. Both images have been enhanced to match each other, with the white box marking an area seen in close-up by Mars Express.

The overview map to the right provides the context. This region is inside Utopia Basin, one of the largest ancient impact basins on Mars, thought to have been formed by an impact that occurred a little more than four billion years ago. Much of Mars’ dark volcanic dust is thought to come from the Medusae Fossae Formation, a gigantic volcanic ash field the size of India and located on the other side of the planet, in between all of the red planet’s largest volcanoes. Over the eons that ash has gotten distributed across the globe.

In this case, it not only covers large areas of Utopia Basin, but over a half century the prevailing winds in the thin Martian atmosphere has been enough to shift the edge of this particular ash field south by 200 miles.

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India’s space agency: In ’25 it did 20 maneuvers to avoid collisions in space

10:29 am

India's space agency ISRO, as transparent as mud
India’s space agency ISRO.

India’s space agency ISRO today released its annual Space Situational Report, describing the collision possibilities that now exist due to the large increase in orbiting objects. According to this report, in 2025 ISRO did 20 maneuvers to avoid collisions in space.

More than 150,000 alerts issued by the Combined Space Operations Center (CSpOC) of USSPACECOM for ISRO’s Earth orbiting satellites were analysed using more accurate orbital data from operational flight dynamics. There were 4 collision avoidance maneuvers (CAM) for GEO [geosynchronous orbits], while 14 CAMs, including one for NISAR [A NASA/ISRO radar telescope], which is designated as Risk Mitigation Maneuver in NASA terminology, were performed for LEO [low Earth orbiting] satellites. Wherever feasible, collision avoidance requirements were met by adjusting orbit maintenance maneuvers to avoid exclusive CAMs.

In addition, ISRO had to twice shift the orbit of its Chandayaan-2 lunar orbiter because of an orbital conflict with NASA’s Lunar Reconnaissance Orbiter (LRO).

The report has a lot more interesting details, as ISRO is also trying to increase its ability to track everything in orbit, rather than rely on data from the American military or American commercial tracking companies, which has been the policy in the past.

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Saxavord spaceport faces new regulatory and financial issues

9:19 am

Proposed or active spaceports in North Europe
Proposed or active spaceports in North Europe

The long-delayed Saxavord spaceport on the Shetland Islands in Great Britain appears to now face two new problems that could block future launches, one regulatory and the second financial.

First the financial issue: The spaceport, which has lost about $7 million in both ’23 and ’24, appears to be in technical default of a loan of a bit more than $14.3 million. In this case, the lender is willing to ignore the technical issue, assuming the spaceport meets certain conditions presently being negotiated.

The regulatory issue however is more serious, and could block the spaceport’s expected first launch later this year by the rocket startup Rocket Factory Augsburg.

Despite claiming to be ready for launch, the spaceport has also been subject of a formal complaint to the SIC [Shetland Islands Council] over allegations that the facility has not yet been granted a completion certificate or approval for occupation. The complaint alleges that the fire detection and alarm systems appear not to have been installed and that the premises may be in use without adequate fire precautions. It asks the council to confirm whether the premises has been subject to regulatory oversight and whether it has undertaken an inspection of the site.

The SIC said in response: “Concerns have been raised with the council and these are being looked at by our building standards service. A site inspection is scheduled this week as part of the live building warrant process, including to establish the current position in relation to the building on the site that falls within the council’s building standards remit. Any further action will be considered in light of the findings of that inspection.”

In other words, if the local council finds the fire detection and alarm systems not installed and within its regulatory responsibility, it will deny Saxavord its launch permit.

Meanwhile, the spaceport has been trying for years to get other rocket companies interested in using Saxavord, to no avail. Rocket startups have enough difficulties. They quite rightly don’t need the added delays caused by the UK’s red tape, delays that contributed to the bankruptcy of two different rocket startups. For example, most of the regulatory delays — lasting years — have initially come from a variety of national agencies, with Great Britain’s Civil Aviation Authority leading the way. This new issue is local, an additional bureaucratic layer that must be satisfied.

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Vast unveils a proposed docking port more than 3x larger than standard space station ports

8:01 am

Vast's larger port compared to standard ports now used at ISS
Click for short movie.

The space station startup Vast yesterday unveiled its proposed Large Docking Adapter, designed to provide a docking port more than three times wider than the standard space station ports presently used on ISS.

The image to the right provides an clear comparison. The two smaller ports on the left are presently used on ISS. Vast’s new port is on the right.

Vast, the company developing next-generation space stations, announced today at the 41st Space Symposium the Large Docking Adapter, including its current development, its availability for purchase, and Vast’s plans to open-source its interface.

Future space stations will use larger modules, have greater overall mass, and dock with a new generation of bigger crewed vehicles. New docking standards and universal hardware are required for the future generation of space vehicles and habitats. The Large Docking Adapter is engineered to support higher mass and increased structural demands while enabling varying types of modules and vehicles to dock together. By open-sourcing the interface, slated for May 2026, Vast is intending to encourage industry-wide collaboration and accelerate the development of interoperable space systems.

Animations of the adapter at this Vast website suggest strongly that the company wants to encourage SpaceX to use the adapter on Starship. Since the company is releasing the design as open-source, it also wants everyone to use it as the standard.

Such a port could also be used on a variety of other spacecraft designs presently under development, and if used would enhance their capabilities significantly.

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Voyager wins slot to fly tourist mission to ISS in 2028

4:24 pm

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

NASA today announced that it has awarded Voyager Technologies a slot to fly a tourist mission to ISS in 2028.

The mission, named VOYG-1, is expected to spend as many as 14 days aboard the space station. A specific launch date will depend on overall spacecraft traffic at the orbital outpost and other planning considerations.

Voyager will submit four proposed crew members to NASA and its international partners for review. Once approved and confirmed, they will train with NASA, international partners, and the launch provider for their flight.

Voyager is the lead company in the consortium that is building the Starlab station, a single very large module to be launched on SpaceX’s Starship.

At this moment three of the five commercial stations that are developing private space stations — Axiom, Vast, and Voyager — now have deals to fly such missions to ISS. The two remaining likely didn’t pass muster with NASA, for different reasons. Max Space is a late comer to this competition, only declaring that it is building its own station this year. Orbital Reef, led by Blue Origin and Sierra Space, is apparently a dead project, with neither company doing anything to sell its project for the past year or so.

In my rankings below of the five American commercial space stations presently in development, the first three are essentially tied at this point.
» Read more

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Sweden’s space agency signs cooperative licensing agreement with the FAA

11:40 am

Proposed or active spaceports in North Europe
Proposed or active spaceports in North Europe

The Swedish Space Agency has signed a cooperative licensing agreement with the FAA to help facilitate orbital launches by American rocket companies from its Esrange spaceport.

While the Esrange Space Centre has been in operation since the 1960s, it has strictly been used for suborbital flights. In 2023, SSC Space, the commercial operator of the facility, inaugurated a new launch complex at Esrange to support orbital missions. While the facility has yet to host a launch, South Korea’s Perigee Aerospace and US launch provider Firefly Aerospace have both committed to using it in the future.

Sweden’s efforts to enable US rocket launches from Esrange took another step forward on 15 April 2026, as the Swedish National Space Agency signed an agreement with the FAA to coordinate the licensing of those missions. The agreement builds on a 2025 Technology Safeguards Agreement between the two countries, which laid the groundwork for US launch providers to export what the US government considers “advanced space technology” to Sweden.

Esrange’s interior location remains a problem, however. Any orbital launch is going to have to fly over other countries, either Finland, Russia, or Norway, and it remains unclear whether those countries will approve. Norway has already expressed opposition.

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A review of India’s government space program suggests it is behind schedule

11:28 am

India's space agency ISRO, as transparent as mud
India’s space agency ISRO.

Link here. The main take-away of the article is that the investigation into the two launch failures of ISRO’s PSLV rocket has stalled everything, including the planned two unmanned orbital test missions of its Gaganyaan capsule, needed before the actual manned mission can fly in early 2027. The first was originally supposed to fly in March, but has been delayed pending completion of the investigation of the PSLV failures.

That investigation however has stalled far more than just Gaganyaan:

The Indian Space Research Organisation (Isro), which had announced an aggressive manifest of 18 launches for 2026, has so far completed only one in the first four months of the year, and that mission [PSLV] ended in failure.

The article also notes a decline in ISRO’S transparency in recent months, a decline that bodes ill for the agency and its programs. I have noted this as well. When ISRO in February 2026 announced the next PSLV launch for this coming June, it released no information from its investigation of the previous two launch failures. If ISRO knows what went wrong, it wasn’t saying. All it has told us so far is that the cause of the two launch failures was for different reasons.

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DESI telescope completes its nominal mission, mapping more than 47 million galaxies

9:56 am

DESI map
Click for original image.

The Dark Energy Spectroscopic Instrument (DESI) on the Mayall 4-meter telescope at Kitt Peak in Arizona, in Arizona has now completed its initial five-year nominal mission, mapping more than 47 million galaxies to produce a rough 3D map of the universe.

By comparing how galaxies clustered in the past with their distribution today, researchers can trace dark energy’s influence over 11 billion years of cosmic history. Surprising results using DESI’s first three years of data hinted that dark energy, once thought to be a “cosmological constant,” might be evolving over time. With the full set of five years of data, researchers will have significantly more information to test whether that hint disappears or grows. If confirmed, it would mark a major shift in how we think about our Universe and its potential fate, which hinges on the balance between matter and dark energy.

The image to the right shows the map, with the blank areas to the left and right regions blocked by the Milky Way.

DESI will continue mapping for at least another three years, refining its data. I suspect when scientists begin analyzing this information they will find there are more than one way to interpret it.

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Amazon buys Globalstar satellite constellation

9:32 am

Amazon Leo logo

As part of an effort by Amazon to make its Leo internet constellation more competitive with SpaceX’s Starlink constellation, the company has just completed a deal for about $11 billion to acquire the Globalstar satellite constellation, which includes Globalstar’s partnership with Apple and its Iphones.

The Seattle-based company’s agreement to acquire the satellite operator behind Apple’s iPhone Emergency SOS feature promises to give it a new constellation of operating satellites, a key slice of mobile spectrum, and Apple as a flagship partner.

…Under a separate long-term agreement announced along with the deal, Amazon Leo will power satellite features on future iPhone and Apple Watch models, including Emergency SOS, messaging, Find My location sharing, and roadside assistance. Amazon will also continue supporting the Apple devices that already rely on Globalstar’s existing network.

In other words, Amazon’s Leo internet constellation is now primed to also provide extensive cell phone service, service that at the moment appears superior to the cell service that Starlink can offer.

Or not. Amazon is playing catch-up, with Starlink operational and owning the market with millions of signed-up customers. It needs to offer a superior product to convince people to eithe buy it or switch to it. This deal is part of that effort.

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Three launches today, two by SpaceX and one by China

9:37 pm

The launch beat goes on! First, China launched eight satellites using its Kinetic-1 (Lijian-1) rocket, lifting off from its Jiuquan spaceport in northwest China. China’s state-run press provide no further information about the satellites, nor did it provide information about where the rocket’s lower stages crashed inside China.

Next, SpaceX completed two Starlink launches on opposite coasts. First it placed 29 Starlink satellites in orbit, its Falcon 9 rocket lifting off from Cape Canaveral Space Force Station in Florida. The first stage completed its 26th flight, 42 days after its previous flight, landing on a drone ship in the Atlantic.

The company then did its second launch of the day, placing 25 Starlink satellites into orbit, its Falcon 9 rocket lifting off from Vandenberg Space Force Base in California. The first stage completed its 21st flight, 45 days after its previous flight and landing on a drone ship in the Pacific.

The leaders in the 2026 launch race:

46 SpaceX
20 China
5 Rocket Lab
4 Russia

For the third straight year SpaceX continues to lead the entire world combined in total launches, 46 to 34.

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Firefly’s delays launch of its Eclipse rocket to 2027

9:31 pm

Eclipse as of April 2026
Click for original image.

It appears that Firefly has delayed the first launch of its new more powerful Eclipse rocket — being built in partnership with Northrop Grumman — to 2027.

The company made no specific announcement, but in a tweet today touting the rocket’s “fresh look”, with no details, the company linked to its Eclipse webpage (in the first link above) that describes the rocket in detail. In the last paragraph adds that the first launch is now scheduled for “no earlier than 2027”, a delay from the 2026 launch date both companies were originally targeting.

This guarantees that SpaceX’s Falcon 9 is going to get more launch contracts taking Northrop Grumman’s Cygnus capsule to ISS.

Firefly says Eclipse is being built for re-usability, but the graphics of the rocket, as shown above, are puzzling in that they show grid fins but no landing legs.

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Space Force selects Blue Origin as possible lessor of “Sudden Flats” site at Vandenberg for future heavy lift rocket launches

3:46 pm

Vandenberg Space Force Base

The Space Force has chosen Blue Origin to help develop the plans and possibly lease the “Sudden Flats” site — also dubbed Space Launch Complex-14 (SLC-14) — at Vandenberg Space Force Base in California for the launch of heavy lift commercial rockets.

The location is shown in the map to the right. The Space Force had requested proposals for developing the site in December 2025.

Respondents were evaluated based on technical capability, financial maturity and alignment with U.S. government requirements. The selection of Blue Origin reflects their ability to meet these criteria and contribute to the development of heavy or super-heavy launch capabilities at Vandenberg Space Force Base.

SLC-14 is considered the most viable site at [Vandenberg] for heavy and super-heavy launch operations due to its location.

Several crucial milestones must be achieved before any construction or launch activities can commence, to include safety assessments and an environmental impact analysis. The timeline for increased launch activity will depend on the completion of the safety and environmental analysis and subsequent infrastructure development.

I suspect that Blue Origin won this bid because SpaceX didn’t offer a proposal. It already has three launch sites for Starship/Superheavy, and probably decided it didn’t need this site.

Blue Origin meanwhile in November 2025 announced planned upgrades to its New Glenn rocket that would make it as powerful as NASA’s SLS rocket, but much cheaper because its first stage is reusable. The company is likely hoping to build that rocket, dubbed New Glenn 9×4 (based on the number of engines on the first and second stages respectively), and launch it from this site.

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Update on Superheavy/Starship: Both ships doing final static fire testing

2:41 pm

Link here. The report includes a lot of very interesting information about how SpaceX is evolving its launch platforms and the tank farms that fuel the stages in order to make them operate more efficiently. For example:

In the past, on Pad 1, SpaceX had only four Liquid Oxygen (LOX) Pumps and six subcoolers, and three Liquid Methane (LCH4) Pumps with three subcoolers. This setup allowed SpaceX to start booster load at T-41:15 on Flight 11.

On Pad 2, SpaceX has five pumps and about 10 subcoolers worth of capacity on the LOX side, and four pumps alongside about six subcoolers worth of capacity on the LCH4 side. With these upgrades, along with larger supply lines, SpaceX can now load a full booster within 30 minutes, and each LOX ring takes only about 90 seconds to load. This now means SpaceX can load the Superheavy booster faster than a Falcon 9 and carry over 10 times the propellant. [emphasis mine]

Many of the tests have been more to prove out the fueling systems and launchpad than to test Superheavy.

Other tests however have been to prove out the new Raptor-3 engine. The company have increased the number of engines step by step so that the next test will be the first to test all 33 engines. I suspect that test will also be the full dress rehearsal countdown prior to launch.

Starship meanwhile is undergoing testing on the company’s nearby Massey test stand, the one that I think was rebuilt after an explosion last year.

Stay tuned. It appears the next and 12th orbital test flight will not be long in coming.

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Three launches, two by SpaceX and one by China

10:10 am

Falcon 9 landing for its seventh time
Falcon 9 landing for its seventh time on today’s
third launch. See below.

Since last night there were three launches globally, two by SpaceX, and one by China.

First, in the wee hours of the morning SpaceX placed 25 more Starlink satellites into orbit, its Falcon 9 rocket lifting off from Vandenberg Space Force Base in California. The first stage (B1063) completed its 32nd flight, landing on a drone ship in the Pacific. With this flight, 43 days after the stage’s previous flight, it moved into a tie for fourth place in the rankings of the most reused launch vehicle:

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

Sources here and here.

Next China launched a classified satellite to test “internet technology”, its Smart Dragon-3 (Jielong-3) rocket lifting off from a sea platform in international waters in the South China Sea. Though China has launched numerous times from this sea platform, previous launches were very close to the shore. This was the first time the platform was moved this far into the ocean.

Finally, SpaceX completed its second launch in less than eight hours, sending Northrop Grumman’s Cygnus capsule on its way to ISS with 11,000 pounds of cargo, its Falcon 9 rocket lifting off from Cape Canaveral Space Force Station in Florida. The first stage completed its seventh flight, landing back at Cape Canaveral. Of the two fairings, one was making its first flight, while the other was on its fifth flight.

This was SpaceX’s fourth Cygnus launch for Northrop Grumman. The company originally launched Cygnus on its own Antares rocket, but when that rocket ran out of its Russian first stage engines it was grounded. The company hired Firefly to build a new first stage, but that project remains uncompleted.

Cygnus is scheduled to berth with ISS in two days, on Monday, April 13, at 12:50 pm (Eastern).

The leaders in the 2026 launch race:

44 SpaceX
19 China
5 Rocket Lab
4 Russia

For the third straight year SpaceX continues to lead the entire world combined in total launches, 44 to 33.

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Orion’s risky return-to-Earth happens tonight at 8:07 pm (Eastern)

9:47 am

The Earth as seen by the Artemis-2 astronauts, from behind the Moon
The Earth and Moon during the lunar fly-by on April 6, 2026.
Click for original image.

After spending ten days in space, including a swing around the back of the Moon, the four-person Artemis-2 crew is now preparing for its return-to-Earth this evening, splashing down off the Pacific coast near San Diego.

At 10:53 p.m. EDT [last night], the Orion spacecraft ignited its thrusters for 9 seconds, producing an acceleration in velocity of 5.3 feet-per-second and pushing the Artemis II crew toward Earth. The crew is now more than halfway home.

About two hours before the burn, there was an unexpected return link loss of signal during a data rate change affecting the transmission of communications and telemetry from the spacecraft to the ground. Two-way communications were reestablished, and flight controllers resumed preparing for the upcoming burn with the crew shortly after.

…The third return trajectory correction burn is scheduled for April 10 at about 1:53 p.m. ahead of re-entry procedures.

This is I think the second time Orion has had a short loss of communications with ground control. In addition, the crew had to cancel a planned manual piloting demonstration of Orion while it flew past the Moon because of a leak in an internal helium tank, used to maintain pressure in the oxygen tank as the propellant is used. The leak was inside the European-built service module, which will be jettisoned before re-entry and burn up in the atmosphere.

Mission managers say this leak has not impacted any engine burns, but it will require attention before the next flight.

The return to Earth however carries the biggest risk of the entire mission. Orion’s heat shield is questionable. During its first use in the 2022 unmanned Artemis-1 flight around the Moon, it did not behave as expected, with large chunks breaking off instead of thin layers ablating away. Though mission engineers have adjusted the flight path through the atmosphere to mitigate stress, there is great uncertainty about that solution.

I have embedded NASA’s live stream of the return-to-Earth below. It begins at 6:30 pm (Eastern), though the first return event, jettison the service module, doesn’t occur until 7:33 pm (Eastern).
» Read more

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Amazon to begin commercial availability of Leo internet service in mid-2026

9:21 am

Amazon Leo logo

In an annual letter [pdf] to shareholders, Amazon’s CEO Andy Jassy announced the company plans on inaugurating its Leo internet constellation to customers in “mid-2026,” assuming the company can get a significant more satellites in orbit in the next few months.

Jassy’s wording was interestingly vague, however, suggesting this target date is very uncertain.

Over the last seven years, we’ve built a low Earth orbit satellite network (Amazon Leo) and put more than 200 satellites into space (which is the third-largest low Earth orbit network operating today). With a few thousand more satellites launching in the coming years, the constellation is expanding rapidly.

…While Amazon Leo is officially scheduled to launch in mid-2026, we already have meaningful revenue commitments from enterprises and governments.

To be precise, Amazon presently has launched 241 satellites, out of the 1,616 it needs to launch by July 2026 to meet its FCC license requirement. Because it is not expected to meet that requirement, the company has asked for a time extension, which the FCC is presently considering. The entire first generation constellation is supposed to have 3,232 satellites, so it seems unlikely Amazon will be able to provide internet service by mid-2026, as promised. It won’t have enough coverage with less than a fourth of its constellation in orbit.

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India conducts another parachute drop test for its Gaganyaan manned capsule

9:03 am

Gaganyaan drop test
Click to watch video of drop test.

India’s space agency ISRO today successfully completed its second helicopter drop test of a dummy capsule, testing the parachute release system that its Gaganyaan manned capsule will use on return to Earth.

In this test, a simulated Crew Module, weighing about 5.7 tonnes, that is equivalent to the mass of the Crew Module in the first uncrewed Gaganyaan mission (G1), was lifted by an Indian Air Force Chinook helicopter to an altitude of about 3km and released over a designated drop zone in sea, near to Sriharikota coast.

Ten parachutes of four types were deployed in a precise sequence during the descent of the Crew Module, gradually reducing the velocity for safe touchdown. Subsequently, the simulated Crew Module was successfully recovered in coordination with Indian Navy. The IADT-02 test validated the parachute-based deceleration systems in the Crew Module.

The manned mission is presently scheduled for early next year, after a series of unmanned orbital test flights are completed in ’26. This schedule is significantly later than ISRO’s original schedule. When the program was first proposed in 2018, ISRO said the manned mission would happen in 2022.

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China launches another set of satellites for its Guowang internet constellation

8:52 am

China yesterday successfully completed the 21st launch for its Guowang (Satnet) internet satellite constellation, its Long March 6A rocket lifting off from its Taiyuan spaceport in northeast China.

Though China’s state-run press provided no information on the number of satellites in the payload, all previous launches using the Long March 6A had carried five satellites. If so, that would mean the constellation now has 164 satellites in orbit, out of a planned 13,000. This fits with the information in the article at the link, which states the constellation now has “nearly 170 satellites” in orbit.

China’s state-controlled press also made no mention about where the rocket’s core stage (using very toxic hypergolic fuels) and its four solid-fueled strap-on boosters crashed inside China.

Another launch attempt today by the German rocket startup Isar Aerospace was scrubbed due to “a leak in a composite overwrapped pressure vessel (COPV).” COPV tanks are used inside the main tanks. As the propellant in that main tank is used, the COPV releases helium to maintain the tank’s pressure. No new launch date has been announced.

The leaders in the 2026 launch race:

42 SpaceX
18 China
5 Rocket Lab
4 Russia

For the third straight year SpaceX continues to lead the entire world combined in total launches, 42 to 32. It has another Starlink launch scheduled for this evening.

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Now on Starlink!

9:37 pm

Starlink logo

My posting this afternoon today was interrupted because I was spending the day going up and down from my roof as I and friend Ken worked to install my new Starlink antenna.

As always with these kinds of jobs, there were moments that reminded me of a motto of mine when I used to assembly Ikea furniture as a part-time job: “It’s ‘Do everything twice day!'” In the end, the problems were minor and quickly solved, such as discovering that the Starlink ethernet cable from the power supply to the router could only be plugged in in one direction. The plugs on either end looked identical, but we struggled for almost twenty minutes trying to get the plug to click into the router, to no avail. Then a light bulb went off, and we decided to flip the cable. Lo and behold, both ends clicked in instantly.

Setting up the account and the Wi-Fi and the computers went very quickly, mostly thanks to my lovely wife Diane. Starlink only allows you to do this stuff on a smart phone, and I won’t touch one of those with a 200-foot pole. She got it all going within a very short time.

I had hesitated doing this for the past two years, mostly because it involved a lot of other non-Starlink-related time-consuming stuff too boring to describe but that we both wanted to avoid. We finally got that stuff taken care of in the past month and could make the switch.

The Zimmerman household is linked to the world, through space. Seems entirely appropriate.

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ESA paid Arianespace about $96 million for an Ariane-6 launch

9:24 am

According to a story today on European Spaceflight, the European Space Agency (ESA) paid its commercial division Arianespace €82 million [about $96 million] for its Ariane-6 launch in November 2025 of ESA’s Earth observation Sentinel-1D satellite.

The European Space Agency has disclosed that launching the Sentinel-1D Earth observation satellite aboard an Ariane 62 rocket in November 2025 cost €82,070,773. As part of its involvement in the development of the European Union’s Copernicus Earth observation satellite constellation, ESA is responsible for placing contracts with European industry for the development, launch, and operation of satellites. As part of this responsibility, the agency publishes an annual list of all contracts awarded with a value of more than €15,000. In 2025, this included the disclosure of the cost of launching Sentinel-1D aboard an Ariane 6 rocket in its two-booster variant [dubbed Ariane-62].

This is the first time ESA or Arianespace have revealed any price figures for using Ariane-6, and shows that Arianespace is attempting to price Ariane-6 competitively with SpaceX’s Falcon 9 rocket. The article notes that SpaceX charged ESA about $90 million for an earlier Sentinel launch.

Because Falcon 9 is mostly reusable, SpaceX’s profit margin is far higher than Arianespace’s. Ariane-6 is expendable, and thus costs more. Thus, if necessary SpaceX could significantly lower its price, but hasn’t because it hasn’t yet felt any competitive pressure to do so. When the new reusable rockets from Stoke Space and Rocket Lab begin launching sometime this year, then launch prices will drop considerably, and Ariane-6 will find itself very over-priced, with no way to lower its cost enough to compete.

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