Tag: engineering

Europe and India sign agreement to work together on manned space flight

9:35 am

The European Space Agency (ESA) yesterday announced that it has signed an agreement with the Indian government that will lay the groundwork for them to work together on manned space exploration, first in connection with their future space station plans and later on lunar exploration.

ESA and ISRO declared their intent to work together on the interoperability of rendezvous and docking systems to allow their respective spacecraft to work together in low Earth orbit. They will also examine further activities related to astronaut training, analogue space missions – where teams test aspects of space missions in ground-based simulations – and parabolic flight activities.

…Future cooperation possibilities include ESA astronaut flight opportunities to the planned Bharatiya Antariksh Station (BAS) and early scientific utilisation, as well as developing infrastructure in low Earth orbit. The two space agencies are also discussing alignment on payloads and robotic scientific missions to the Moon.

Faced with the decommissioning of ISS in 2030, as well as the likely end to several major Artemis components (Orion and Lunar Gateway) that ESA has had a major part, it appears Europe has quickly begun looking for other alternatives. It already has partnered with the American consortium building the Starlab space station, but this new agreement with India gives it more options.

India meanwhile gets aid and support from Europe. It could even be that both are negotiating transferring some of Europe’s Lunar Gateway modules to India’s space station.

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SpaceX gets approval to sell Starlink in India

9:18 am

Almost immediately after India’s government issued this week new tightened regulations for allowing private satellite constellations to sell their services in India, it also apparently completed negotiations with SpaceX to allow it to sell Starlink in India based on these rules.

According to sources, the DoT [Department of Transportation] granted the LoI [Letter of Intent] after Starlink accepted 29 strict security conditions, including requirements for real-time terminal tracking, mandatory local data processing, legal interception capabilities, and localisation of at least 20% of its ground segment infrastructure within the first few years of operation.

Starlink’s nod came amid heightened national security sensitivities, coinciding with India’s pre-dawn Operation Sindoor strikes on terror camps across the border in response to the Pahalgam massacre. However, DoT officials clarified that the decision to approve Starlink was independent of these military developments.

At the moment SpaceX’s chief competitors, OneWeb and Amazon’s Kuiper constellation, have not yet obtained the same permissions. This allows SpaceX to grab a large portion of the market share in India before either of these other companies.

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Seepage coming from under an ancient Martian flood lava flow?

12:13 pm

Seepage at edge of lava flow?
Click for original image.

Cool image time! The picture to the right, cropped, reduced, and enhanced to post here, was taken on April 3, 2025 by the high resolution camera on Mars Reconnaissance Orbiter (MRO).

I have enhanced the image to make it easier to see the details. It appears we are looking at three layers. At the base (on the left side of the picture) is a relatively smooth bottom layer with the highest number of scattered craters. On the top (on the right side of the picture) is a somewhat rough layer with fewer craters.

In between is a middle layer that appears to be seeping out from under the top layer.

The science team seems to agree with my last guess, as they label this image “Possible basal seepage at flow boundary.” The flow boundary is the edge of a lava flood that scientists believe covered a distance of about 1,400 miles at speeds ranging from 10 to 45 miles per hour.
» Read more

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India tightens its satellite regulations for foreign companies

9:27 am

In what is a likely response to the increased military conflict with Pakistan, India’s government has announced new satellite regulations for foreign companies that will likely impact the operations of both Starlink and OneWeb.

The country’s Department of Telecommunications (DoT) announced 29 additional regulations May 5, citing national security interests, which also apply to companies that already hold licenses for providing space-based communication services directly to users.

The rules include a requirement for call logs and other user data to be stored in India, and new obligations for interception and monitoring under national law. Satellite operators must also show how they plan to source at least 20% of their ground infrastructure equipment from India within five years of commercial launch.

The article at the link suggests that these new regulations will have a greater impact on OneWeb than Starlink. Yet, OneWeb already has approval to sell its services in India, while Starlink has not.

The article also included one interesting tidbit from a Starlink official, noting that the company expects to have 6.5 million subscribers by the end of this year. Based on the company’s subscriber fees, that translates into many billions in revenue. Very clearly SpaceX no longer needs NASA to develop Starship.

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Ispace’s Resilience lander successfully enters lunar orbit

9:15 am

Map of lunar landing sites
Landing sites for both Firefly’s Blue Ghost and
Ispace’s Resilience

Ispace today announced that its lunar lander Resilience, launched in January by SpaceX, has now been successfully inserted into lunar orbit,

Ispace engineers performed the injection maneuver from the Mission Control Center in Nihonbashi, Tokyo, Japan in accordance with the mission operation plan. The orbital maneuver required a main thruster burn lasting approximately 9 minutes, the longest to date during Mission 2. RESILIENCE is now maintaining a stable attitude in its planned orbit above the lunar surface. Mission operations specialists are now preparing for final orbit maneuvers after reaffirming Ispace’s ability to deliver spacecraft and payloads into lunar orbit. A lunar landing is scheduled for no earlier than June 5, 2025 (UTC) (June 6, 2025, JST).

If all goes right, Resilience will touch down in Mare Frigoris in the northern latitudes of the Moon’s near side, as shown on the map to the right.

This is Ispace’s second attempt to soft land on the Moon. Its first attempt, Hakuto-R1, got within three kilometers of the surface in Atlas Crater (also shown on the map), but then its software mistook its altitude, thinking it was only a few feet above the surface and shut down the engines prematurely, causing it to crash.

This second landing is critical for the company’s future. It has contracts for future landers from both NASA and Japan, but a failure now might cause both governments to reconsider those deals.

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Sunspot update: Activity rises slightly in April

1:06 pm

It is the start of the month, so it is of course time for my monthly report on sunspot activity, based on the update that NOAA posts each month to its own graph of sunspots activity. As I have done since the start of Behind the Black in 2010, I take that graph each month and annotate it with extra information to illustrate the larger scientific context.

Sunspot activity in April did nothing to tell us anything about the Sun’s future activity. It rose slightly, but not by enough to suggest that the prediction put forth last month by NOAA scientists that the ramp down to solar minimum has begun is wrong.
» Read more

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FAA approves SpaceX request to increase Starship launch rate at Boca Chica

11:40 am

The FAA today by email announced that it has released the final environmental reassessment that approves SpaceX’s request to increase the number of yearly Starship/Superheavy launches at Boca Chica to as many as 25.

The assessment is now available for public comment, and could still be revised. However, the FAA’s conclusions are clear, as indicated by the highlighted phrase:

The FAA is announcing the availability of the Final Tiered Environmental Assessment and Mitigated Finding of No Significant Impact/Record of Decision (FONSI/ROD) for the SpaceX Starship/Super Heavy Vehicle Increased Cadence at the SpaceX Boca Chica Launch Site in Cameron County, Texas (Final Tiered EA and Mitigated FONSI/ROD).

Under the Proposed Action addressed in the Final Tiered EA, the FAA would modify SpaceX’s existing vehicle operator license to authorize:  Up to 25 annual Starship/Super Heavy orbital launches, including: Up to 25 annual landings of Starship (Second stage); Up to 25 annual landinqgs of Super Heavy (First stage). The Final Tiered EA also addressed vehicle upgrades.

You can read the executive summary of this announcement here [pdf]. The full reassessment can be read here [pdf]. Its conclusion is quite blunt:

The 2022 PEA [Preliminary Environmental Assessment] examined the potential for significant environmental impacts from Starship/Super Heavy launch operations at the Boca Chica Launch Site and defined the regulatory setting for impacts associated with Starship/Super Heavy. The areas evaluated for environmental impacts in this EA [environmental assesssment] included air quality; climate; noise and noise‐compatible land use; visual resources; cultural resources; Department of Transportation Section 4(f); water resources; biological resources (terrestrial and marine wildlife); land use; hazardous materials; natural resources and energy supply; and socioeconomics, and children’s health. In each of these areas, this EA concludes that no significant impacts would occur as a result of SpaceX’s proposed action. [emphasis mine]

As I’ve noted repeatedly, this has all been self-evident for years, as proved by the environmental circumstances at the American spaceports at Cape Canaveral and Kennedy in Florida and Vandenberg in California. Spaceports help the environment by creating large wildlife refuges where no development can occur. We have known this for decades. That the FAA and the federal bureaucracy has in the past five years suddenly begun demanded these long reassessments time after time that simply restate these obvious facts can only be because that bureaucracy wants to justify its useless existence with make-work.

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Update on launch schedule for India’s manned space program

10:59 am

According to the head of India’s space agency ISRO, V Narayanan, the first unmanned Gaganyaan orbital mission is now targeting a launch in the last quarter of this year, followed by two more unmanned test flights in 2026 and the manned mission of one to three days flying in the first quarter of 2027.

This schedule appears more firm than any previously announced. When first proposed back in 2018, ISRO’s goal was to launch the first manned mission in 2022. And like all government projects, the launch date kept getting pushed back again and again. ISRO officials will blame the COVID panic for these delays, but that’s hogwash. While ISRO shut down for almost two years out of fear of a only slightly more potent illness than the flu, others did not, and ended up stealing almost all of ISRO’s commercial business as a result.

The delays in Gaganyaan also stem from the unrealistic goals first put forth by ISRO. For example, initially the program did not include these unmanned test flights, a lack that was foolish and later corrected.

Based on all reports in the past year, however, it appears that this newest schedule probably reflects reality, and will take place more or less as described.

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Astronomers measure the vibrations of a star 21 light years away

10:22 am

Using an instrument on the ground-based Keck telescope in Hawaii, astronomers have been able to measure the internal vibrations of a star 21 light years away, the equivalent of recording a star’s seismology.

Keck Observatory’s KPF instrument precisely measures the motion of the stellar surface towards and away from the observer. Over four consecutive nights, the team used KPF to collect over 2,000 ultra-precise velocity measurements of the star — enabling them to catch the star’s vibrations in action. This is the first asteroseismic inference of the age and radius for a cool star using KPF.

The astronomers next claim that this data allowed them to date the star’s age as 10.2 billion years old, and that it was about 4% smaller in diameter than measured by other observations. Both these conclusions carry uncertainties, but the former has implications if true for the present theories of stellar evolution, since this star appears to be behaving differently than expected for a star this old.

Astronomers have been doing this kind of stellar seismology for the Sun for several decades. To now have instruments sensitive enough to detect it on stars light years away is truly astonishing.

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Stratolaunch completes first hypersonic test flight for Pentagon

9:58 am

The military this week confirmed that Stratolaunch had successfully completed its first two hypersonic test flights for the Pentagon in December and March.

The hypersonic vehicle named Talon A2 exceeded Mach 5—the threshold for hypersonic speed—in two Pentagon-backed test flights conducted in December 2024 and March 2025, the Defense Department confirmed May 5.

The flights mark the first time since the X-15 program, which ended in 1968, that the U.S. has conducted reusable hypersonic testing.

At the moment the military’s hypersonic test program is really getting its money’s worth from private enterprise. Stratolaunch is doing tests using a reusable vehicle. Rocket Lab is doing suborbital flights using a revised version of its Electron rocket’s first stage. Varda will do hypersonic tests with its capsule when it returns from orbit. And startups Ursa Major and Radian have won contracts to do their own test flights.

For literally decades the military’s hypersonic test program had limped along, barely able to do tests more than once every few years. Then however it was run entirely by the government. Now that the military has stopped trying to be the designer and builder but simply a customer, it is getting what it needs fast and with a great deal of variety.

Ain’t freedom and competition and private enterprise wonderful?

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NASA engineers complete 17-day balloon flight, testing a new “super pressure” technology

8:54 am

Map of flight
Click for original map

NASA engineers have decided to end a flight test of a new “super pressure” balloon after flying for seventeen days and circling Antarctica.

While the mission successfully met its minimum requirements for qualification of the balloon, the team had been monitoring minor performance issues and suspected that the system had a small leak. The balloon was maintaining its predicted float altitude during daytime hours; however, it started to show considerable drops in altitude, especially as it passed through areas of colder temperatures like storm systems.

…Teams continued to closely monitor the health and performance of the balloon as it continued flight, and its ability to safely make it to the next predicted land crossing in South America for recovery of the balloon and payload. However, at approximately four additional days until land, all ballast expended to manage altitude stability, and recent altitude excursions during night periods down to 60,000 feet, continued flight became unlikely. NASA ultimately decided to terminate the flight to ensure the greatest level of control and safety during descent. “Due to the mission’s trajectory coupled with system performance, termination and recovery at the next land over flight was not possible due to unacceptable public risk,” said Garde.

This first flight is part of a two-flight test program this season, with the second super pressure balloon already in flight. Like the first, it is aiming for a 100 day flight circling the globe at the high mid-latitudes comparable to its launch site in New Zealand. You can track its flight in real time here.

As with all NASA test programs like this, the real question will be whether this technology will be used for any practical purpose once the program is completed, or whether it will be shelved away and forgotten. For most such programs, it is the latter that occurs. In this case however there are a number of companies attempting to make money selling tourists flights on less sophisticated high altitude balloons, and those companies might be interested in adopting this technology. There are also several balloon companies that provide surveillance data for the military which might be interested as well.

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It only took $22 billion and 19 years: Lockheed Martin proudly announces the completion of the first Orion capsule capable of manned flight

10:56 am

Orion's damage heat shield
Damage to Orion’s heat shield caused during re-entry in 2022,
including “cavities resulting from the loss of large chunks”.
Nor has this issue been fixed.

My heart be still. On May 1, 2025 Lockheed Martin proudly announced that it had finally completed assembly and testing of the first Orion capsule capable of taking human beings into space.

Lockheed Martin [NYSE: LMT] has completed assembly and testing of NASA’s Orion Artemis II spacecraft, transferring possession to NASA’s Exploration Ground Systems (EGS) team today. This milestone is a significant step for NASA and the Artemis industry team, as they prepare to launch a crew of four astronauts to further the agency’s mission in establishing a human presence on the Moon for exploration and scientific discovery. It will also help build the foundation for the first crewed missions to Mars.

Orion is the most advanced, human-rated, deep space spacecraft ever developed. Lockheed Martin is the prime contractor to NASA for Orion and built the crew module, crew module adaptor and launch abort system. “This achievement is a testament to our employees and suppliers who have worked tirelessly to get us to this important milestone,” said Kirk Shireman, vice president of Human Space Exploration and Orion program manager at Lockheed Martin. “The Orion spacecraft completion for Artemis II is a major step forward in our nation’s efforts to develop a long-term lunar presence. It’s exciting to think that soon, humans will see the Earth rise over the lunar horizon from our vehicle, while also traveling farther from Earth than ever before.”

What disgusting hogwash. First of all, Lockheed Martin was issued the contract to build two capsules, one for testing and one for manned flight, in 2006. It only took the company 19 years to build both. Second, that 2006 contract was supposed to only cost $3.9 billion. Instead, NASA has forked out more than $22 billion.

And what have we gotten? Two capsules, plus a handful of prototype test versions. Worse, this first capsule will be the first to ever carry the life support systems that keep humans alive, as Lockheed Martin admits in its press release:
» Read more

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SpaceX launches a record 29 Starlink satellites

9:53 am

SpaceX early this morning successfully launched 29 Starlink satellites (the most yet on a single launch), its Falcon 9 rocket lifting off from Kennedy Space Center in Florida.

The first stage completed its 20th flight, landing on a drone ship in the Atlantic.

The leaders in the 2025 launch race:

52 SpaceX
23 China
5 Rocket Lab
5 Russia

SpaceX now leads the rest of the world in successful launches, 52 to 40.

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Trump bypasses Boeing to get an newly refurbished 747 Air Force One

12:40 pm

Apparently disgusted with Boeing’s inability to get two Boeing 747s refurbished on budget and before he leaves office in 2028, the Trump administration has now enlisted another aerospace company, L3Harris, to refurbish a 747 formerly used by the Qatar government.

The president hopes to use the refurbished plane by the fall, sources told the outlet, and is regularly checking on its progress . This aircraft will be an interim solution until the Boeing jets are delivered.

The current presidential jets — which have been in service since the George H.W. Bush administration — are nearing their end of life.

Boeing’s conduct here has been truly disgraceful. It got the $3.9 billion fixed-price contract to refurbish two of its own 747s in 2018. Yet, despite having two working 747s — a plane it designed and built — it can’t refurbish them in less than a decade, while going over budget by about $2.4 billion, money it has to lay out because of the fixed-price nature of the contract.

Hat tip to reader James Street.

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Space Force awards twelve companies satellite development contracts worth $237 million

9:38 am

Capitalism in space: The Space Force yesterday announced that it has awarded twelve different aerospace companies contracts worth a total of $237 million for developing a variety of smallsat technologies to be used in future military satellite constellations.

The list of selected companies, announced May 1, includes defense and aerospace firms Lockheed Martin Corp. and General Atomics, as well as specialized space firms such as Blue Canyon Technologies, Loft Orbital Federal, Spire Global, Terran Orbital, and York Space Systems. Also named were Axient, Lynk Global, Orbit Systems, Turion Space, and the Utah State University-affiliated Space Dynamics Lab.

…Under the contract, vendors will build and integrate small satellite buses capable of carrying a variety of military experiments and sensors. These buses, often the size of a microwave or small refrigerator, serve as standardized platforms that can be customized to carry diverse payloads.

These contracts are part of the Trump administrations push to get the military to rely on the private sector for its needs. Though the private sector would general build things in the past for the Pentagon, often the design, construction, and even ownership was held entirely by the government. The companies didn’t have anything they could sell elsewhere. Now the design work is being left entirely to the companies, so that what they develop they will own, and will have the ability to market it to others.

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Ursa Major wins contract for hypersonic test flight of its Draper rocket engine

9:29 am

The rocket engine startup Ursa Major has now won a $28.5 million contract from the Air Force Research Laboratory to do a hypersonic test flight using its Draper rocket engine.

The contract, announced May 1, covers both the flight demonstration and integration of the engine into a test vehicle, with work scheduled through early 2027. The project aims to advance U.S. capabilities in hypersonic weapons, a category of defense systems that has become a top Pentagon priority amid competition with China and Russia.

The Draper engine is designed to produce 4,000 pounds of thrust and was developed by Ursa Major with U.S. Air Force funding. Its key differentiator is its use of storable, non-cryogenic propellants — specifically a kerosene and hydrogen peroxide combination — that remain liquid at ambient temperatures. This contrasts with traditional rocket engines that rely on liquid oxygen, which must be kept at ultra-low temperatures and handled with complex cooling infrastructure.

It certainly does appear that the Pentagon is ramping up its hypersonic research with a slew of contracts to many different new commercial space startups. In addition to this deal, Rocket Lab, Varda, and Stratolaunch have won contracts for similar hypersonic testing, with Rocket Lab winning the most. No wonder a new company like Radian (see previous post) is switching its focus toward this research.

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Rocket startup Radian now also building commercial reentry capsule

9:20 am

The rocket startup Radian Aerospace, which is attempting to build an orbital spaceplane that takes off and lands from a runway, has announced that it is also building a commercial reentry capsule that can be used for hypersonic testing.

The Seattle based company announced April 29 its intent to develop the Radian Reusable Reentry Vehicle (R3V), a spacecraft for hypersonics testing or returning payloads from space that also gives Radian flight experience in key technologies for its future Radian One spaceplane.

Livingston Holder, chief technology officer of Radian, said in an interview that the company was looking was ways to test Dur-E-Therm, the thermal protection system it is creating for Radian One. The company had recently completed tests of the system in a lab at NASA’s Glenn Research Center. “But, testing in a non-flight environment only gets you so far, so we were crafting how to test it in a more relevant environment.”

It appears the company has recognized that its spaceplane will take years to develop, and more years before it can bring in any revenue. An orbital capsule however can be developed much more quickly, and it also appears there are a lot of commercial and military customers for it.

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Giant galactic magnetic filament disturbed by pulsar

12:18 pm

A giant galactic filament disturbed by a pulsar
Click for original image.

Cool image time! The false-color X-ray picture to the right, reduced and sharpened to post here, was released today by the science team for the Chandra X-ray Observatory, showing some interesting astronomical features about 26,000 light years away near the galactic center.

The press release attempts to catch the ignorant press’s interest by referring to the long white filament that crosses this image as “a bone”, implying that this is similar to a medical X-ray of a person’s bones. Hogwash. What we are looking at is a filament of energized particles forced into this long thin shape by the magnetic field lines that exist in the central regions of the Milky Way galaxy.

What makes this X-ray data of interest is shown in the inset. The pulsar appears to have disturbed that filament, pulling those energetic particles away to form a trailing cloud.

In the first composite image, the largely straight filament stretches from the top to the bottom of the vertical frame. At each end of the grey filament is a hazy grey cloud. The only color in the image is neon blue, found in a few specks which dot the blackness surrounding the structure. The blue represents X-rays seen by NASA’s Chandra X-ray Observatory.

In the annotated close-up, one such speck appears to be interacting with the structure itself. This is a fast-moving, rapidly spinning neutron star, otherwise known as a pulsar. Astronomers believe that this pulsar has struck the filament halfway down its length, distorting the magnetic field and radio signal.

As big and empty as space is, there is still enough stuff within it to cause these kinds of interactions. It just requires the luxury of endless eons, something that we as short-lived humans have trouble conceiving.

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A Martian river of ice

11:54 am

A Martian river of ice
Click for original image.

Cool image time! The picture to the right, cropped, reduced, and sharpened to post here, was taken on January 26, 2025 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). The science team labeled it “Looking for Gullies” because the researchers were likely searching for such geological features on the cliff wall that runs down the right side of the picture.

What is more significant however about this picture is the glacier features in the canyon below that cliff. The downhill grade is to the southwest, and it is very evident that the canyon is filled with glacial-type debris, flowing down that grade. Along the base of the cliff the flow seems focused but squeezed, the larger blocks to the west moving slower and thus acting like a wall themselves. In between the flow moves like rapids in a narrow part of a river, albeit in slow motion.
» Read more

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Astronomers discover a cluster of a thousand very young stars that is flying apart for unknown reasons

10:01 am

Astronomers using data from Gaia, which measured the precise distance and position of more than two billion stars, have discovered a very young cluster of a thousand stars that is flying apart for unknown reasons.

The cluster is about 650 light-years away in Ophiuchus, the Serpent Bearer, and has been nicknamed “Ophion” in honor of its resident constellation. “Ophion is filled with stars that are set to rush out across the galaxy in a totally haphazard, uncoordinated way, which is far from what we’d expect for a family so big,” said Huson in a statement. “What’s more, this will happen in a fraction of the time it’d usually take for such a large family to scatter. It’s like no other star family we’ve seen before.”

You can read the peer-reviewed paper here [pdf]. The scientists proposed several theories that might explain what disrupted this cluster so early in its history, but none are very convincing, with the data available.

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Startup that builds maneuverable surveillance satellites raises $260 million in private investment capital

9:27 am

The startup True Anomaly has raised $260 million in private investment capital in order to fully develop its Jackal maneuverable satellite, designed to travel and inspect other orbiting satellites for the military.

The Colorado-based company announced April 30 that it closed a Series C round that combines equity and debt financing. Venture firm Accel led the round, with participation from Meritech Capital and several existing backers including Eclipse, Riot Ventures, Menlo Ventures, and Narya. Stifel Bank is providing the debt portion of the raise.

Only founded in 2022, True Anomaly has already flown two test missions of Jackel. With these new funds, it plans four more flights in the next year and a half.

There are already a number of other companies building maneuverable satellites. Most however are focused on providing tug services for commercial satellites or for finding and removing space junk. True Anomaly is instead targeting the military as its customer, which appears a smart move because no one else has, up to now.

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Psyche asteroid probe experiences an unexplained engine problem

12:36 pm

Psyche's flight path to the asteroid Psyche
Psyche’s flight path to the asteroid Psyche.
Click for original image.

The probe Psyche, presently on its way to the asteroid of the same name, has experienced a thruster issue with its electric ion-type main engine that has forced engineers to postpone further engine use as they troubleshoot the problem.

Psyche began firing its thrusters in May 2024. On April 1, the spacecraft detected a pressure drop in the line that feeds the xenon gas to the thrusters, going from 36 pounds per square inch (psi) to about 26 psi. As designed, the orbiter powered off the thrusters in response to the decrease.

The mission team has chosen to defer thrusting while engineers work to understand the pressure decrease. The mission design supports a pause in thrusting until at least mid-June before the spacecraft would see an effect on its trajectory. The electric propulsion system has two identical fuel lines, and the team may decide to switch to the backup fuel line to resume thrusting.

This mission has been plagued with problems. First its software was completed late, forcing a year delay in its launch. Next it was discovered — too late to fix — that transistors on the spacecraft had not been properly hardened for the hostile environment of space. Engineers hope these transistors “will heal themselves” once in that environment, but there are no guarantees. [My memory is becoming fuzzy. As many of my readers pointed out, this transistor problem was with Europa Clipper, not Psyche.]

Now its electric ion engine, essential to getting it to Psyche, is not working properly.

If this problem is fixed and Pysche resumes engine firing, it is targeting an arrival at the asteroid Psyche in 2029.

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Chinese crew returns safely after six months in space

9:36 am

A Chinese crew of three safely landed in northern China today after completing a six month mission on China’s Tiangong-3 space station.

The return capsule of the Shenzhou-19 crewed spaceship, carrying astronauts Cai Xuzhe, Song Lingdong and Wang Haoze, touched down at the Dongfeng landing site in north China’s Inner Mongolia Autonomous Region on Wednesday. The three astronauts are all in good health condition, according to the China Manned Space Agency.

Lots of pictures of the landing and recovery at the link, but that’s pretty much the entire text of the press release from China’s state-run press. As that state-run press does routinely, it repeats that same text as the caption under every picture, over and over again, changing it only slightly for the close-up pictures of each astronaut.

A new crew took over for this one on Tiangong-3, beginning their own six month mission. At the moment China has completed three years of continuous occupation out of a planned ten-year mission.

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Firefly launch fails

12:20 pm

In its first launch attempt in 2025, Firefly’s Alpha rocket had a problem shortly after the first stage separated from the upper stage and the upper stage’s engines began firing. The upper stage began swivel somewhat though it appeared to stablize after a few seconds.

Subsequent reports confirmed that the stage failed to reach orbit.

The launch of the FLTA0006 mission appeared to go as planned until stage separation about 2 minutes and 35 seconds after liftoff. A cloud suddenly formed between the two stages, and video showed what appeared to be debris falling away as the upper stage continued its ascent.

A camera on the upper stage also showed debris falling away from it seconds after separation. The nozzle for the single Lightning engine in the upper stage appeared to be seriously damaged, if not missing entirely.

In a statement four and a half hours after launch, Firefly confirmed that the upper stage and its payload failed to reach orbit because of the stage separation issue. “The rocket then experienced a mishap between stage separation and second stage ignition that led to the loss of the Lightning engine nozzle extension, substantially reducing the engine’s thrust,” the company stated.

Alpha has now launched a total of six times, but only two of those launches were completely successful. Two of the other launches got their payloads into orbit, but not at the proper positions. In all the failures but one, the problems were with the upper stage. Today’s failure is another example of this.

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Weather scrubs first test of experimental vertical take-off/landing rocket built by Middle Eastern startup

11:09 am

Middle East, showing Oman's proposed spaceport
The Middle East, showing the location of
Oman’s proposed spaceport at Duqm.

The first test flight of Horus-4, an experimental vertical take-off/landing rocket built by the Middle Eastern startup Advanced Rocket Technologies, was scrubbed yesterday supposedly due to weather.

The launch had been part of the first public event at Oman’s proposed Etlaq spaceport near the coastal city of Duqm.

Oman’s Etlaq spaceport opened its doors to the public for the first time on Monday, hosting a three-day fan zone experience designed to spark interest in space exploration among the country’s youth.

The event had originally been scheduled to culminate with the launch of the Horus-4 experimental rocket, developed by London company Advanced Rocket Technologies (ART). But unsuitable weather forced the test flight to be delayed, with a new launch date to be announced soon.

Pupils from across Duqm – a coastal town about 550km from Oman’s capital city of Muscat – took part in a variety of educational activities. The fan zone, called Etlaq FX, included four tents that were placed about 3km from the spaceport’s operations team and launch pad, with the site overlooking the Arabian Sea.

At the moment the Duqm spaceport is mostly a launch site for small suborbital rockets. Oman however is pushing hard to sell it to rocket companies, with launches of such small rockets by a variety of startups and Middle Eastern nations scheduled throughout the rest of this year.

Of those launches the most ambitious is that of Advanced Rocket Technologies Horus-4. If it flies and lands successfully, it will be a major technological achievement for the company, and the Arab part of the Middle East.

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Astronaut Don Pettit, 70, wants to fly more missions in space

10:54 am

Despite his apparent significant discomfit upon landing last week after seven months in orbit, American astronaut Don Pettit is still eager to fly more times in space, despite celebrating his 70th birthday on the day he returned from ISS.

Pettit landed in Kazakhstan with his two Russian Soyuz MS-26 crewmates on April 20, 2025 local time in Kazakhstan, his 70th birthday. Cameras cut away as he was extracted from the capsule, raising concerns about his health. During a post-mission briefing today he explained that “I was right in the middle of emptying the contents of my stomach onto the steppes of Kazakhstan” and the cameraman kindly gave him the privacy he needed. He added that his body reacts to the return to Earth about the same way every time regardless of duration.

He looked fit today, just a week later.

At the briefing Pettit noted how returning to Earth can be very discomfiting, but with a little effort and time recovery occurs. He also noted how weightlessness is wonderful for older humans.

“I love being in space,” he said. “When you’re sleeping, you’re just floating, and your body, all those little aches and pains heal up. You feel like you’re 30 years old again and free of pain, free of everything. So I love being on orbit. It’s a great place to be for me and my physiology.”

Whether Pettit gets another flight is unclear. There are a lot of medical research reasons to fly an older individual like him in space. Whether NASA wants to do it is another question. The agency has generally been very timid about doing such things.

Pettit also claimed at this briefing that ISS could fly well past 2030, and shouldn’t be de-orbited then as planned. He however likely spent almost all his time in orbit on the American half, and likely has limited information about the stress fractures in the Russian Zvezda module.

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Since last night four more launches globally

10:26 am

UPDATE: The Firefly launch was a failure. There was a problem during stage separation. See post above.

The worldwide pace of launches continues now relentlessly. Since my last launch post yesterday afternoon, there were four more launches across the global.

First, China launched a “group” of satellites for an “internet constellation,” its Long March 5B rocket lifting off from its coastal Wencheng spaceport. The rocket used a new upper stage which allowed its core stage to shut down sooner and thus not enter orbit to later crash uncontrolled (as earlier Long March 5B cores would do). Instead it fell back into the ocean after launch.

Next, SpaceX sent another 23 Starlink satellites into orbit, its Falcon 9 rocket lifting off from the Kennedy Space Center in Florida. The first stage, flying for the very first time, landed successfully on a drone ship in the Atlantic.

Third, Arianespace, the commercial division of the European Space Agency (ESA), used the Italian rocket company Avio’s Vega-C rocket to place an ESA Earth observation radar satellite dubbed Biomass into orbit, lifting off from French Guiana. This was Arianespace’s second launch in 2025. Though Arianespace managed the launch, it is being phased out. By next year all future launches of Vega-C will be sold and managed by Avio instead, cutting out this bureaucratic middle-man.

Fourth, the American rocket startup Firefly attempted to place a Lockheed Martin demo payload into orbit, its Alpha rocket lifting off from Vandenberg in California. The Lockheed Martin payload is part of a deal that could include as many as 25 launches over the next five years. This was Firefly’s first launch in 2025.

A scheduled launch by Russia of its Angara rocket on a classified military mission was apparently scrubbed, though no information at all has been released as to why the launch did not occur.

The leaders in the 2025 launch race:

50 SpaceX
23 China
5 Rocket Lab
5 Russia

SpaceX now leads the rest of the world in successful launches, 50 to 40.

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ULA launches Amazon’s first 27 Kuiper constellation satellites; SpaceX launches more Starlinks

4:17 pm

Two more launches today. First, SpaceX completed another Starlink launch, placing 27 satellites into orbit, its Falcon 9 rocket lifting off from Vandenberg in California, with its first stage completing its 25th flight, landing on a drone ship in the Pacific.

Next, ULA successfully launched the first 27 Kuiper internet constellation satellites for Amazon, its Atlas-5 rocket lifting off from Cape Canaveral in Florida.

As of posting the Kuiper satellites have not yet been deployed. As this was ULA’s first launch this year, the company is not included in the leader board for the 2025 launch race.

49 SpaceX
22 China
5 Rocket Lab
5 Russia

SpaceX now leads the rest of the world in successful launches, 49 to 38. Two more launches are still scheduled for today, one by SpaceX placing more Starlinks into orbit, and a second a classified Angara launch out of its Plesetsk spaceport in northeastern Russia.

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