Six weeks after he terminated the nomination of Jared Isaacman to become NASA administrator, President Trump moved on Wednesday evening to install a new temporary leader for the space agency.

The newly named interim administrator, Sean Duffy, already has a full portfolio: He is serving as the secretary of transportation, a Cabinet-level position that oversees 55,000 employees at 13 agencies, including the Federal Aviation Administration.

"Sean is doing a TREMENDOUS job in handling our Country's Transportation Affairs, including creating a state-of-the-art Air Traffic Control systems, while at the same time rebuilding our roads and bridges, making them efficient, and beautiful, again," Trump wrote on his social media network Wednesday evening. "He will be a fantastic leader of the ever more important Space Agency, even if only for a short period of time."

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Northwood Space has completed initial testing of the second generation of its phased array antenna technology, which can simultaneously communicate with spacecraft across a range of orbits, from near Earth all the way out to geostationary space.

The prototype gateway was able to connect with several satellites in space during recent testing, said Bridgit Mendler, co-founder and chief executive of Northwood Space. This successful demonstration has given Northwood confidence to move into commercial deployment of the company's antennas within the coming months.

"This system, with planned multinational deployment this year, will be the first building block in our network that over the next three years aims to support 500 simultaneous spacecraft across multiple frequencies, data rates, and orbits," she said.

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Welcome to Edition 8.01 of the Rocket Report! Today's edition will be a little shorter than normal because, for one day only, we celebrate fake rockets—fireworks—rather than the real thing. For our American readers, we hope you have a splendid Fourth of July holiday weekend. For our non-American readers, you may be wondering what the heck is happening in our country right now. Alas, making sense of <waves hands> all this is beyond the scope of this humble little newsletter.

As always, we welcome reader submissions, and if you don't want to miss an issue, please subscribe using the box below (the form will not appear on AMP-enabled versions of the site). Each report will include information on small-, medium-, and heavy-lift rockets as well as a quick look ahead at the next three launches on the calendar.

Will Orbex ever launch an orbital rocket? Orbex, a launch services company based in the United Kingdom, has announced the postponement of its first orbital launch to 2026 due to infrastructure limitations and other issues, Orbital Today reports. At the Paris Air Show at Le Bourget, Orbex chief executive Miguel Bello Mora announced that the company is now targeting next year for the liftoff of its Prime rocket from SaxaVord in Scotland. He said the delay is partly due to the limited launch infrastructure at SaxaVord and a "bottleneck" in site operations.

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There is a growing buzz in the astronomy community about a new object with a hyperbolic trajectory that is moving toward the inner Solar System.

Early on Wednesday, the European Space Agency confirmed that the object, tentatively known as A11pl3Z, did indeed have interstellar origins.

"Astronomers may have just discovered the third interstellar object passing through the Solar System!" the agency's Operations account shared on Bluesky. "ESA’s Planetary Defenders are observing the object, provisionally known as #A11pl3Z, right now using telescopes around the world."

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A little less than four years from now, a killer asteroid will narrowly fly past planet Earth. This will be a celestial event visible around the world—for a few weeks, Apophis will shine among the brightest objects in the night sky.

The near miss by the large Apophis asteroid in April 2029 offers NASA a golden—and exceedingly rare—opportunity to observe such an object like this up close. Critically, the interaction between Apophis and Earth's gravitational pull will offer scientists an unprecedented chance to study the interior of an asteroid.

This is fascinating for planetary science, but it also has serious implications for planetary defense. In the future, were such an asteroid on course to strike Earth, an effective plan to deflect it would depend on knowing what the interior looks like.

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A European company that seeks to develop orbital spacecraft for cargo, and eventually humans, took a step forward this week with a test flight that saw its "Mission Possible" vehicle power up and fly successfully in orbit before making a controlled reentry into Earth's atmosphere.

However, after encountering an "issue," the Exploration Company lost contact with its spacecraft a few minutes before touchdown in the ocean.

In an update on LinkedIn Tuesday morning, the company characterized the test flight as a partial success—and a partial failure.

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After a decade of construction, a large new reflecting telescope publicly released its first images on Monday, and they are nothing short of spectacular.

The Vera C. Rubin Observatory's primary mirror is 8.4 meters in diameter, which makes it one of the largest optical telescopes in the world. However, the real secret sauce of the telescope is its camera—the automobile-sized Legacy Survey of Space and Time camera—which has a resolution of 3,200 megapixels. Which is rather a lot.

The observatory is on a remote 2,682-meter-high (8,799 ft) mountain in northern Chile, a region of the planet with some of the best atmospheric "seeing" conditions.

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Welcome to Edition 7.49 of the Rocket Report! You may have noticed we are a little late with the report this week, and that is due to the Juneteenth holiday celebrated in the United States on Thursday. But that hasn't stopped a torrent of big news this week, from exploding Starships to significant reuse milestones being reached in Asia.

As always, we welcome reader submissions, and if you don't want to miss an issue, please subscribe using the box below (the form will not appear on AMP-enabled versions of the site). Each report will include information on small-, medium-, and heavy-lift rockets as well as a quick look ahead at the next three launches on the calendar.

Honda stamps passport to the skies with a hopper. An experimental reusable rocket developed by the research and development arm of Honda Motor Company flew to an altitude of nearly 900 feet (275 meters) Tuesday, then landed with pinpoint precision at the carmaker's test facility in northern Japan, Ars reports. Honda's hopper is the first prototype rocket outside of the United States and China to complete a flight of this kind, demonstrating vertical takeoff and vertical landing technology that could underpin the development of a reusable launch vehicle.

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There's another leak on the International Space Station, and NASA has already delayed one crew launch to the orbiting laboratory as a result.

Beyond that, the space agency is not offering much information about the unfolding situation in orbit. However, multiple sources have confirmed to Ars that the leak is a serious concern for the space agency as it deals with hardware that is approaching three decades in orbit.

To understand the current situation, it is important to review past leaks on the station, which has an aluminum structure. The station has had a slow but increasing leak since 2019. The air leaks are located in the transfer tunnel of the space station's Russian Zvezda service module, one of the oldest elements of the complex, the first elements of which were launched in 1998. The transfer tunnel, known by the Russian acronym PrK, connects the Zvezda module with a docking port where Soyuz crew and Progress resupply spacecraft attach to the station.

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Nearly two weeks have passed since Jared Isaacman received a fateful, brief phone call from two officials in President Trump's Office of Personnel Management. In those few seconds, the trajectory of his life over the next three and a half years changed dramatically.

The president, the callers said, wanted to go in a different direction for NASA's administrator. At the time, Isaacman was within days of a final vote on the floor of the US Senate and assured of bipartisan support. He had run the gauntlet of six months of vetting, interviews, and a committee hearing. He expected to be sworn in within a week. And then, it was all gone.

"I was very disappointed, especially because it was so close to confirmation and I think we had a good plan to implement," Isaacman told Ars on Wednesday.

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Look, no one said building a large harvester to roam around the Moon and sift through hundreds of tons of regolith to retrieve small amounts of helium-3 would be easy. And that's to say nothing of the enormous challenge of processing and then launching any of this material from the lunar surface before finally landing it safely on Earth.

If we're being completely honest, doing all of this commercially is a pretty darn difficult row to hoe. Many commercial space experts dismiss it out of hand. So that's why it's gratifying to see that a company that is proposing to do this, Interlune, is taking some modest steps toward this goal.

Moreover, recent changes in the tides of space policy may also put some wind in the sails of Interlune and its considerable ambitions.

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Negotiations over the US federal budget for fiscal year 2026 are in the beginning stages, but when it comes to space, the fault lines are already solidifying in the Senate.

The Trump White House released its budget request last Friday, and this included detailed information about its plans for NASA. On Thursday, just days later, the US Senate shot back with its own budget priorities for the space agency.

The US budget process is complicated and somewhat broken in recent years, as Congress has failed to pass a budget on time. So, we are probably at least several months away from seeing a final fiscal year 2026 budget from Congress. But we got our first glimpse of the Senate's thinking when the chair of the Committee on Commerce, Science, and Transportation, Sen. Ted Cruz (R-Texas) released his "legislative directives" for NASA on Thursday

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A remarkable schoolyard brawl erupted online Thursday between President Donald Trump and his former "First Buddy" Elon Musk during which the pair traded insults and barbs. The war of words reached a crescendo during the afternoon when Trump threatened Musk's federal contracts.

"The easiest way to save money in our Budget, Billions and Billions of Dollars, is to terminate Elon's Governmental Subsidies and Contracts. I was always surprised that Biden didn't do it!" Trump wrote on his social media network, Truth Social, at 2:37 pm ET.

Anyone with a reasonable grasp of reality understood that the "bromance" between the president of the United States and the most wealthy person in the world was going to blow up at some point, but even so, the online brouhaha that has played out Thursday is spectacular—at one point Musk suggested that Trump was in the Epstein files, for goodness' sake.

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In a revealing interview published by the All-In Podcast on Wednesday, the private astronaut nominated to lead NASA, Jared Isaacman, spoke at length on what he thought about the nomination process, how he would have led NASA, and the factors that led to the abrupt rescission of his nomination by President Trump.

"I got a call Friday, of last week, that the president has decided to go in a different direction," Isaacman said. "It was a real bummer."

It was a real bummer for most of the space community, myself included. To be clear, I am biased. I have gotten to know Isaacman over the last five years rather well, talking with him about his passion for spaceflight, what is working, and what is not. What I have discovered in Isaacman is a person who cares deeply about the future of US spaceflight and wants to make a meaningful contribution to its advancement. To see him done wrong like this, well, it's a very sordid affair.

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I did not expect to feature NASA astronaut Nichole Ayers in the Tuesday Telescope so soon, but a recent photo she shared is just sublime. (In case you missed it, we wrote about her photo of lightning from space about a month ago.)

This week Ayers has a time-lapse sequence she captured from the Cupola as the International Space Station soared near Central and South America.

"Soooooo much going on in this picture," Ayers wrote on the social media site X. "You can see Nicaragua, Costa Rica, and Panama, with South America off in the distance."

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The Trump administration has confirmed that it is pulling the nomination of private astronaut Jared Isaacman to lead NASA.

First reported by Semafor, the decision appears to have been made because Isaacman was not politically loyal enough to the Trump administration.

"The Administrator of NASA will help lead humanity into space and execute President Trump’s bold mission of planting the American flag on the planet Mars," Liz Huston, a White House Spokesperson, said in a statement released Saturday. "It's essential that the next leader of NASA is in complete alignment with President Trump’s America First agenda and a replacement will be announced directly by President Trump soon."

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I'm incredibly excited, as part of the Ars Live series, to host a conversation with three of the very best space reporters in the business on Thursday, May 29, 2025, at 3 pm EDT about the future of NASA and its deep space exploration ambitions.

Joining me in a virtual panel discussion will be:

• Christian Davenport, of The Washington Post
• Loren Grush, of Bloomberg
• Joey Roulette, of Reuters

The community of professional space reporters is fairly small, and Chris, Loren, and Joey are some of my smartest and fiercest competitors. They all have deep sourcing within the industry and important insights about what is really going on.

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On Tuesday afternoon, just a few hours before a launch attempt of the ninth flight test of SpaceX's Starship vehicle, Elon Musk spoke with Ars Technica Senior Space Editor Eric Berger to talk about where his space company goes from here.

In recent weeks, Musk has dialed back his focus on politics and said he wants to devote the majority of his time to SpaceX and his other companies. So what does that mean?

The conversation came just ahead of the opening of Starship's launch window, at 6:30 pm CT (23:30 UTC) in South Texas. Here is a lightly edited transcript of the interview.

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In recent written testimony to a US House of Representatives subcommittee that oversees the military, the senior official responsible for purchasing launches for national security missions blistered one of the country's two primary rocket providers.

The remarks from Major General Stephen G. Purdy, acting assistant secretary of the Air Force for Space Acquisition and Integration, concerned United Launch Alliance and its long-delayed development of the large Vulcan rocket.

"The ULA Vulcan program has performed unsatisfactorily this past year," Purdy said in written testimony during a May 14 hearing before the House Armed Services Committee's Subcommittee on Strategic Forces. This portion of his testimony did not come up during the hearing, and it has not been reported publicly to date.

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Welcome to Edition 7.44 of the Rocket Report! We had some interesting news on Thursday afternoon from Down Under. As Gilmour Space was preparing for the second launch attempt of its Eris vehicle, as part of the pre-launch preparations, something triggered the payload fairing to deploy. We would love to see some video of that. Please.

As always, we welcome reader submissions, and if you don't want to miss an issue, please subscribe using the box below (the form will not appear on AMP-enabled versions of the site). Each report will include information on small-, medium-, and heavy-lift rockets, as well as a quick look ahead at the next three launches on the calendar.

Rotating detonation rocket engine takes flight. On Wednesday, US-based propulsion company Venus Aerospace completed a short flight test of its rotating detonation rocket engine at Spaceport America in New Mexico, Ars reports. It is believed to be the first US-based flight test of an idea that has been discussed academically for decades. The concept has previously been tested in a handful of other countries, but never with a high-thrust engine.

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