Behind The Black – Robert Zimmerman

Final ground testing begins of Katalyst’s Swift rescue spacecraft

April 18, 2026 5:46 am Robert Zimmerman

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

April 18, 2026 5:31 am Robert Zimmerman

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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Juan Luis Rubiales – Three knives

April 17, 2026 6:01 pm Robert Zimmerman

An evening pause: Some magic to herald the weekend. Note that near the beginning of his actual performance the sound drops out for 40 seconds. Stick with it, the loss is irrelevant.

Hat tip Cotour.

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April 17, 2026 Quick space links

April 17, 2026 2:59 pm Robert Zimmerman

Courtesy of BtB’s stringer Jay. This post is also an open thread. I welcome my readers to post any comments or additional links relating to any space issues, even if unrelated to the links below.

NASA approves providing Europe’s Mars Franklin rover its rocket, landing engines, and radioisotope heater units
The agency has chosen to purchase a Falcon Heavy for the planned 2028 launch. Meanwhile, the rover’s lander remains unfinished, though Airbus and Sener have contracts to create it. Russia was originally supposed to provide it, but was kicked out of the project when it invaded the Ukraine in 2022.

Video of a 1959 Project Orion test using chemical explosive charges to lift a capsule
This was only a preliminary demonstration. Project Orion’s eventual goal was to prove you could propel a spacecraft through a series of nuclear explosions in order to generate thrust.

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The space agencies of Canada and Europe agree to exchange classified information

April 17, 2026 1:51 pm Robert Zimmerman

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

April 17, 2026 9:01 am Robert Zimmerman

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

April 17, 2026 8:26 am Robert Zimmerman

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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Candy Dulfer – Lily Was Here

April 16, 2026 6:01 pm Robert Zimmerman

An evening pause: Performed live 2010.

Hat tip Doug Johnson.

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Latvia to sign Artemis Accords

April 16, 2026 3:27 pm Robert Zimmerman

NASA announced today that Latvia will be signing on to the Artemis Accords on April 20, 2026, becoming the 62nd nation to join this American alliance in space.

The Republic of Latvia will sign the Artemis Accords during a ceremony at 9 a.m. EDT Monday, April 20, at NASA Headquarters in Washington. NASA Administrator Jared Isaacman will host Dace Melbārde, Latvia’s minister for education and science; Jānis Beķeris, chargé d’affaires at the Embassy of the Republic of Latvia to the United States; and Jacob Helberg, under secretary of state for economic affairs at the U.S. Department of State.

With this signing, all three of the Baltic states that were once occupied and part of the Soviet Union have now joined this American alliance. So have the former Soviet provinces of the Ukraine and Armenia, as well as the nations of Bulgaria, Czech Republic, Slovakia, Hungary, Poland, Romania, and Slovenia, all of which were once part of the Soviet Bloc, behind the Iron Curtain. In fact, almost all of Russia’s neighbors in Europe have allied themselves with the U.S. Artemis space alliance. It does appear that Putin’s stupid effort to recapture the Ukraine has backfired badly, encouraging these nations to come to us out of fear of the aggressive tyrant on their borders. These nations also probably recognize that Russia’s space effort is a Potemkin Village, hollow and of little worth. If they want to go to space, they need to align themselves with American technology.

The full list of all signatories to this American space alliance:

Angola, Argentina, Armenia, Australia, Austria, Bahrain, Bangladesh, Belgium, Brazil, Bulgaria, Canada, Chile, Colombia, Cyprus, Czech Republic, Denmark, Dominican Republic, Ecuador, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, India, Israel, Italy, Japan, Latvia, Liechtenstein, Lithuania, Luxembourg, Malaysia, Mexico, the Netherlands, New Zealand, Nigeria, Norway, Oman, Panama, Peru, Poland, Portugal, Romania, Rwanda, Saudi Arabia, Senegal, Singapore, Slovakia, Slovenia, South Korea, Spain, Sweden, Switzerland, Thailand, the Philippines, the United Kingdom, the United Arab Emirates, the Ukraine, the United States and Uruguay.

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April 16, 2026 Quick space links

April 16, 2026 2:45 pm Robert Zimmerman

Courtesy of BtB’s stringer Jay. This post is also an open thread. I welcome my readers to post any comments or additional links relating to any space issues, even if unrelated to the links below.

Video of a ground test of China’s proposed system to catch rocket first stages using cables
It looks to be a half scale engineering test prototype. The system seems very Rube Goldberg, but for once China is actually doing something original.

Drone pictures showing the aftermath of Blue Origin’s incident at their 2CAT facility
Holes are still visible in the roof with some debris outside.

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The movement of surface ash on Mars over a half century

April 16, 2026 12:08 pm Robert Zimmerman

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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New data from Webb suggests two of Uranus’ outer rings are starkly different

April 16, 2026 11:03 am Robert Zimmerman

Click for original image.

Using new infrared data obtained by the Webb Space Telescope in February 2025 and combined with optical data previously obtained by the ground-based Keck Observatory in 2007 and the Hubble Space Telescope in 2003 and 2013, astronomers now think that two adjacent outer rings of Uranus are completely different from each other, with one ring largely created by icy material thrown off the moon Mab.

The infrared image to the right was taken by Webb, and shows the two subject rings, dubbed v and μ.

Though they orbit the same planet, Uranus’s μ and ν rings are fundamentally different. Prior observations with the combined Keck Observatory and HST showed that the μ ring appeared blue, a signature of extremely small particles, while the ν ring’s reddish hue points to a more typical dusty ring. Why the rings were so different remained a mystery, though.

When JWST came on-line and observed Uranus, the research team used all its data, taken at different infrared wavelengths, in combination with Keck Observatory and HST observations to construct a complete spectrum from the visible through to infrared. By analyzing how sunlight reflects off the rings, the team identified a strong absorption feature near a wavelength of 3 microns (3 millionths of a meter) visible in the infrared for both rings. Beyond that shared feature, the differences become clear when simulating the detailed spectra: the μ ring closely matches the spectral signature of water ice, while the ν ring is clearly composed of rocky material, mixed with approximately 10–15% carbon-rich organic compounds commonly found in the outer solar system.

The μ ring seems to be made up of tiny icy grains knocked off the planet’s small (12-km sized) moon, Mab, by micrometeorite impacts. Interestingly, the icy composition of the μ ring also confirms that the moon Mab is composed mostly of water-ice.

According to the paper’s abstract, the v ring is dusty and, “like typical dusty rings, is sourced from collisions between, and micrometeoroid impacts on, larger but as yet unseen parent bodies orbiting within this ring. These bodies must be composed in part of organic materials [molecules with carbon as one component].”

This data really only raises more questions than it answers. For one, what are those larger objects within the v ring? Without a nearby orbiter there is no way to find them. For another, this new data really doesn’t explain why these two adjacent rings are so different. What processes force such a distinct distribution of materials?

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

April 16, 2026 10:29 am Robert Zimmerman

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

April 16, 2026 9:19 am Robert Zimmerman

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

April 16, 2026 8:01 am Robert Zimmerman

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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Emma Kok & Matheu Hinzen – You’re The One that I Want

April 15, 2026 6:01 pm Robert Zimmerman

An evening pause: Performed live c2025. From the musical Grease.

Hat tip Judd Clark, who notes that this performance is “Quite different than from the last time you showed Emma Kok,” when she was only fifteen.

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Voyager wins slot to fly tourist mission to ISS in 2028

April 15, 2026 4:24 pm Robert Zimmerman

Starlab design as of December 2025

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

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

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

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

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

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

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

April 15, 2026 11:40 am Robert Zimmerman

Proposed or active spaceports in North Europe

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

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

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

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

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

April 15, 2026 11:28 am Robert Zimmerman

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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A very interesting and revealing interview of NASA administrator Jared Issacman

April 15, 2026 11:02 am Robert Zimmerman

NASA administrator Jared Isaacman

Link here. I found this interview with NASA administrator Jared Issacman to be very informative and worth reading, especially in regards to his comments on the proposed cuts to NASA’s budget.

First, he admits right off the bat that the heat shield was his biggest concern during the Artemis-2 mission. He also took a swipe at past NASA management over this issue. After noting that the initial inspection of the Artemis-2 shield after recovery showed it experienced little serious damage, he added this: “All that aside, if you’re going to wait three and a half years between missions, just replace the heat shield.” In other words, after Artemis-1 NASA management dithered when it saw the damaged heat shield. It should have immediately moved to replace it.

As for the proposed Trump budget cuts and the opposition to those cuts by many in Congress, Issacman said this:

There’s a lot of passionate people out here [referring I think to the space industry and its advocates]. They can do incredible things, from a scientific perspective. I don’t know how many of them have ever pulled together a financial model, and driven execution on some of these things to say what should or shouldn’t be the right budget.

Now, all that said, of course, we will maximize every dollar that Congress affords to the agency. But it is not healthy, for the agency, to get in this mindset that we have to spend our way out of every problem. And I don’t think it’s good for the country to think we have to print our way out of every problem. [emphasis mine]

This is not the first time Isaacman has indicated he thinks NASA can survive these cuts, and in fact can do as well if not better by using what it gets more wisely. It is however the first time he has put NASA’s budget in the context of the entire federal budget, which is badly out of control. Isaacman does not want more money from Congress because he thinks it is bad for the nation to spend itself into debt. He thinks he has enough to do the job.

The entire interview is worth reading. It indicates a very practical and honest mindset. Everyone might not agree with every proposal Isaacman has put forth, but he is clearly approaching things from a very good place.

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

April 15, 2026 9:56 am Robert Zimmerman

Click for original image.

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

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

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

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

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Amazon buys Globalstar satellite constellation

April 15, 2026 9:32 am Robert Zimmerman

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

April 14, 2026 9:37 pm Robert Zimmerman

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

April 14, 2026 9:31 pm Robert Zimmerman

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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April 14, 2026 Quick space links

April 14, 2026 9:09 pm Robert Zimmerman

Courtesy of BtB’s stringer Jay. This post is also an open thread. I welcome my readers to post any comments or additional links relating to any space issues, even if unrelated to the links below.

Jay sent these to me when I didn’t have the wherewithal to post it. I am doing it now, a bit late.

Rocket Lab touts is satellite deployment system used on Artemis II

First flight of ugraded Angara-5M rocket, carrying a prototype of Russia’s new manned capsule is delayed until 2027-2028
A two to three year delay. Does anyone believe this?

Russia cancels building a reusable version of Angara due to lack of funds
Russia should thank Putin and his incredibly stupid invasion of the Ukraine for bankrupting his country.

Blue Origin touts its “scalable, modular system that creates purified oxygen … using Moon-extracted oxygen”
Once again, we could use less touting and more real hardware from Blue Origin.

New comet might be visible to the naked eye this weekend
Comet C/2025 R3 (Pan-STARRS) is in an orbit that has it fly close to the Sun every 170,000 years. It will only be visible to people in the southern hemisphere.

Vast touts its astronaut flight suit to be used on its Haven-1 single module space station launching next year.
It definitely looks more comfortable and nicer than SpaceX’s Dragon flight suits.

Just released: NASA Moon Base User’s Guide [pdf]
Unlike past NASA releases like this — which try to paint NASA as having all the answers — this short summary is largely focused on the “gaps” in engineering and equipment needed for the Moon base. Thus, it is a guide for the private sector: “This is what we need! If you build it we will buy it!”

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Maria Callas – Bizet’s Carmen Habanera

April 14, 2026 6:01 pm Robert Zimmerman

An evening pause: Performed live 1962. Make sure you have closed captions activated as it provides a translation.

Hat tip Wayne DeVette.

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

April 14, 2026 3:46 pm Robert Zimmerman

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

April 14, 2026 3:20 pm Robert Zimmerman

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

April 14, 2026 2:41 pm Robert Zimmerman

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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All is well

April 13, 2026 11:40 pm Robert Zimmerman

All is well but there are some minor complications that will take up my time for the next few days. I might get time to post soon, but the priority is dealing with my health.

My deepest thanks to everyone for their well wishes. I really appreciate it.

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Winner of the 2003 Eugene M. Emme Award of the American Astronautical Society.