Tag: spaceflight

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 agencies of Canada and Europe agree to exchange classified information

1:51 pm

Canada:
Canada: “We let our government do it all!”

In what appears to be the increasing policy of the Canadian Liberal government to align its space program with Europe, the Canadian Space Agency this week signed an agreement with the European Space Agency that will make it possible for them to freely exchange classified information.

The European Space Agency (ESA) and Canada have signed a General Security of Information Agreement (GSOIA), which will establish a legally binding framework for the exchange of classified information. The agreement was signed on 14 April at the 41st Space Symposium in Colorado Springs, USA, by ESA Director General Josef Aschbacher and President of the Canadian Space Agency Lisa Campbell, on behalf of the Government of Canada.

The GSOIA will ensure that both parties uphold the highest standards of security while enabling the secure exchange of sensitive information entrusted to authorised institutions and industrial partners. It provides a robust foundation for cooperation in areas where the protection of classified information is essential. In particular, the agreement will facilitate closer collaboration in strategic domains such as space-based surveillance, disaster response and security-related technologies. It will also support the development of dual-use capabilities, including advanced sensing systems, secure communications and emerging space technologies.

Canada is the only country not in Europe that is a partner in ESA. This deal, plus Canada’s recent commitment to provide a half billion dollars of funding to ESA projects, illustrates the Liberal government’s policy to look to Europe more for its space effort, rather than the United States.

This appears also to be part of the Liberal government’s shift away from capitalism and towards a government-based space effort, a decision that is certain to produce few results while wasting a lot of money.

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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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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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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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Scientists: First data from Europe’s Proba-3 satellites suggest the Sun’s slow solar wind is faster and more chaotic than expected

3:20 pm

Figure 4 showing variable speeds of slow solar wind
Click for original image.

The uncertainty of science: According to the first published paper [pdf] from Europe’s two Proba-3 satellites, scientists have found the slow solar wind that comes from the Sun is sometimes far faster than expected, and is also far more chaotic. From the second link above:

Just like wind on Earth, solar wind can be fast or slow, smooth or gusty. Fast solar wind usually flows in a smooth current from magnetic structures called coronal holes. In contrast, slow solar wind is variable and gusty, making understanding how it works more difficult.

Scientists think that slow solar wind is generated by the Sun’s magnetic field lines changing how they are connected, merging and separating again. This process pushes out blobs of plasma (electrically charged gas) in so-called ‘streamers’: large, bright rays in the corona.

…Previously, scientists found that close to the Sun’s surface, slow solar wind should have speeds around 100 km/s. Instead, Andrei’s team tracked some blobs of plasma moving at 250–500 km/s.

The graph to the right, Figure 4 in the paper, shows Proba-3’s tracking of a variety of these blobs. Not only did some move faster than expected (the arrows above the gray line marking earlier data), their speeds changed with time, with some actually speeding up.

The reason the Sun’s fast wind is relatively stable is that it emanates from magnetic structures dubbed coronal holes because the magnetic field lines there are is somewhat calm and stable. The slow wind meanwhile comes out through much more active and unstable regions of the magnetic field, with its field lines jumping about as well as connecting and unconnecting from the field’s structure in a chaotic manner.

This research suggests that the slow wind is chaotic and thus unpredictable, almost like the weather on Earth.

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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 survives re-entry, crew splashes down safe

5:27 pm

Orion just after main parachute deployment
Orion just after main parachute deployment

Orion successfully survived re-entry tonight with its questionable heat shield, with the capsule splashing down off the coast of California at 8:07 pm (Eastern).

All four astronauts are healthy and safe. As of posting they were still in the capsule, floating on the ocean, with recovery crews on their way to it. [Update: those recovery crews, six boats with more than 40 people, are taking an ungodly amount of time to latch onto the capsule and begin recovery. Over an hour after splashdown the crew is still in the capsule.]

The Artemis-2 mission is now over, though the final condition of that heat shield still needs to be analyzed. In addition, engineers need figure out how to fix a bunch of other issues that took place during the mission:

  • A leak in an internal helium tank on Europe’s service module
  • Communication drop-outs several times
  • the endless issues with Orion’s toilet

There were other minor issues that cropped up repeatedly, none significant but all of which should be fixed. And though it will be helpful to determine how this heat shield performed, it should be noted that the data is essentially irrelevant to future missions. The next mission, Artemis-3, will use a completely different design, and test it for the first time on a manned flight. That flight however will be in Earth orbit, so the stress on the shield will be far less than this return, even with the changed re-entry path.

Though many will call this lunar fly-by “historic,” it will likely be little remembered by future generations. It did little to move the settlement of the solar system forward. No truly useful engineering was tested. The rocket and capsule are engineering dead-ends. Neither will be of much use for establishing colonies on the Moon or Mars, as SLS is still too expensive and too difficult to stack and launch and Orion is too small for any interplanetary missions, being nothing more than an overweight and very expensive ascent/descent capsule.

The only plus of this mission is that it will likely give NASA’s administrator, Jared Isaacman, the political clout to institute major changes in the entire Artemis program, changes that could make the American colonization of the solar system more likely. There are strong indications that he wants to make better use of the private sector.

And that private sector is poised to bypass NASA, regardless of what NASA wants or tries to do, with capabilities far better then anything we have seen since the Apollo program.

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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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Martian mountains on Mount Sharp

11:45 am

Panorama looking up Mount Sharp
Click for larger full resolution image. For original images go here and here.

Overview map
Click for interactive map.

Cool image time! The panorama above was created using two pictures taken by the high resolution camera on the rover Curiosity on Mars (here and here).

The overview map to the right gives the context. The blue dot marks Curiosity’s position on the day before these pictures were taken, climbing through the foothills on the flanks of Mount Sharp. I do not know if it traveled again before taking these two pictures above. The white dotted line its past travels, while the red dotted line its planned future route. At present Curiosity has climbed about 3,500 feet up the mountain. It is still about 15,000 feet below the peak, which is about 25 miles away and not visible from here.

The yellow lines indicate where I think the panorama is looking, though I admit that I am not sure. The view is distant, since this is high resolution camera. This panorama might actually be looking in a completely different direction, downhill at one of the hills that Curiosity previously drove past. The air is very dusty, which means if the rim of Gale Crater is in the background, 20-30 miles away, we can’t see it.

Regardless, the science team has finally finished its many nine-month-long survey of the boxwork geology, and has sent Curiosity climbing again. I think these pictures are part of their review of the future terrain, as they plan the rover’s route through the lighter-colored sulfate terrain higher on the mountain. If instead they are looking downhill, they were taken both to review previously viewed geology as well as to measure the dustiness of the atmosphere.

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European Union to restructure its space bureaucracy

10:38 am

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

The European Commission of the European Union (EU) announced earlier this week that it is renaming its “European Union Agency for the Space Programme” to the “European Union Space Services Agency (EUSPA)”, with the new agency aimed at running the EU’s various satellite projects, including its Galileo GPS-type constellation, its proposed communications constellations, and its various European security satellite projects.

The proposed regulatory document can be read here [pdf]. More details can be found here:

In the text of the draft regulation, the Commission says the agency is expected to play a crucial role in implementing Union space systems and wider space policy from 2028 to 2034 as part of the European Competitiveness Fund. That places the agency firmly inside the next generation of EU planning for satellite navigation, Earth observation, secure connectivity, space situational awareness and related civil and defence applications.

One of the clearest elements in the proposal is the agency’s planned renaming. The draft regulation states that the current European Union Agency for the Space Programme would become the European Union Space Services Agency. The Commission says this is meant to reflect more accurately the body’s current and future role as an operational actor supporting the delivery of Union space systems rather than simply administering a programme framework. That change in title is therefore intended to signal a broader institutional shift rather than a cosmetic rebranding.

The language above as well as the actual regulation itself I think illustrates well why the European Union is increasingly falling behind the rest of the world in space. The wording is obtuse, complex, and jargon-filled, often aimed at making things seem more significant than they really are.

The number of different bureaucracies involved is also a bad sign. On top is the EU. Under that is the European Commission. Below that is this new agency EUSPA. On the side is the European Space Agency, which though it will have a representative at all EUSPA meetings the division of responsibilities between it and EUSPA is very unclear.

All told, everything about this document and the government bureaucracies involved seems designed to do things slowly and in a manner guaranteed to cost more.

No wonder many member nations of the EU and ESA have decided to go their own way, even as they politely maintain membership in these organizations. Germany, France, Spain, and Italy are all now pushing the development of new commercial independent space companies within their borders, all attempting to launch similar space assets, but with the ability to eventually do it faster and cheaper.

I would expect those new private companies will soon eclipse anything proposed by EUSPA in the coming decade.

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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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Saxavord spaceport lost about $7 million in both ’23 and ’24; Andoya launch scheduled for today

9:00 am

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

According to a report in the Times of London yesterday, the Saxavord spaceport on the Shetland Islands lost about $7 million in both ’23 and ’24.

Annual accounts for Shetland Space Centre, the SaxaVord operating company, show a near 32 per cent rise in revenue to £2.5 million for 2024. The document, recently lodged at Companies House, shows a £5.4 million [$7.25 million] pre-tax loss, compared to £5.1 million [$6.85 million] in 2023.

The spaceport is controlled by billionaire Anders Holch Povlsen, who had been instrumental in using the courts to block launches from the other proposed spaceport in Sutherland, Scotland. Saxavord meanwhile was first proposed about four years ago, but it has also not yet had its first launch. In both cases, the major obstacle has been the United Kingdom’s regulatory bureaucracy run by its Civil Aviation Authority, which has taken years to issue permits and licenses. Those delays have bankrupted two rocket companies, Virgin Orbit and Orbex, because they were unable to launch as scheduled.

Saxavord hopes its first launch will occur later this year, from the German rocket startup Rocket Factory Augsburg. That company had hoped to launch in 2024 — after more than a year delay due to red tape — but an explosion during the final static fire test of the first stage ended those plans.

Meanwhile, the first orbital launch from Norway’s Andoya spaceport is now expected later today by the German rocket startup Isar Aerospace. This will be the second launch of its Spectrum rocket, the first failing just after lift-off in 2025. This second attempt had been scrubbed in January and March, and is now scheduled for 1 pm (Pacific) today. I have embedded its live stream below.
» Read more

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Russia’s latest plans for its post-ISS space station

8:12 am

The present Russian plans to transition from ISS to its Russian Orbital Station
Click for full resolution image.

Anatoly Zak yesterday posted the picture to the right, showing a presentation by Russian officials of Roscosmos’ latest plans for its transition from ISS to their own Russian Orbital Station (ROS). Though it is in Russian, I think I can glean from it some significant take-aways about Russia’s future space plans.

First, if these plans proceed as planned (doubtful based on Russia’s track record in the past three decades), at some point in the next four years they will attach a new module to ISS, docking with the Prichal docking hub, launched in 2021. Then in 2030 they will undock this new module as well as Prichal and the Nauka module, which also launched in 2021, and use these three modules as the core of their new station.

That 2030 date is significant, as it is an admission by Russia that it intends to stay with ISS until then. Up till now Roscosmos has only committed to ISS through 2028, even though NASA and its partners at ESA and Japan have set 2030 as ISS’s present retirement date.

Second, they plan to add more modules to this core station, beginning in 2031, and by 2034 to have completed a four-module cross-shaped station with Prichal as the central hub. That completion date is one year later than the timeline Russia announced in 2024, when it claimed ROS would be completed in 2033. That 2024 timeline also said ROS’s first module would be launched in 2027, but the graphic to the right no longer gives any date for that launch. I suspect 2027 is extremely unlikely.

Finally, don’t expect the new modules promised in the 2031-2034 timeframe to launch on schedule either. As I note above, all Russian space projects in this century have routinely been delayed repeatedly, with most never launching at all.

This plan also makes no mention of an agreement with India in December 2025 to coordinate the construction of its station with Russia’s, flying both in the same inclination presently used by ISS. This is not really a surprise, as both projects will operate independently, so that delays in one do not impact the other.

Hat tip BtB’s stringer Jay.

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China launches 18 more Qianfan internet satellites

5:16 pm

Earlier today China successfully placed 18 more Qianfan internet satellites into orbit, its Long March 8 rocket lifting off from its coast Wenchang spaceport.

This was the seventh launch for this Starlink competitor, which is also called Spacesail or G60, bringing the total number of satellites launched to 137, out of a planned constellation of as many as 10,000. The first phase of the constellation however only requires 648. Though China hopes to reach that number before the end of this year, it will be a year late, based on the constellation’s international licensing requirement. Moreover, there have been stories suggesting this project is short of cash.

The leaders in the 2026 launch race:

42 SpaceX
17 China
5 Rocket Lab
4 Russia

SpaceX continues to lead the entire world combined in total launches, as it did in both ’24 and ’25, 42 to 31.

China was supposed to do another launch this afternoon, but as of posting there is no report announcing it.

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Update on SpaceX’s Starship/Superheavy launchpad improvements at Boca Chica

9:35 am

Link here. The article provides many details about the design improvements and testing that SpaceX is doing at the Boca Chica launchpad prior to the next Starship/Superheavy orbital test flight, now expected sometime in mid-May.

All the improvements appear designed to allow for quicker reuse of the pad, including protecting it better when both Starship and Superheavy return to be captured by the chopstick towers. For example:

On the tower, work has progressed on the Ship Quick Disconnect (SQD) arm, which connects to the Starship upper stage for propellant loading. This week, technicians added steel reinforcements to the lower side of the arm’s shoulder section. These additions are believed to strengthen the structure while enabling the arm to retract more quickly during launch.

A faster swing-out reduces the risk of damage from the intense exhaust plume of Super Heavy’s 33 Raptor engines at liftoff. This improvement should minimize post-launch refurbishment and contribute to a higher launch cadence. The core work on the SQD arm itself appears largely complete, and scaffolding may soon be removed as final preparations continue.

Other work includes a new tower roof structure to protect it from the rocket’s engine exhaust, and other work on the pad itself to facilitate faster fueling. These additions have been accompanied by testing to make sure they work.

All this work appears intended to make it possible to launch frequently once the next test launch is completed.

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