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Received today — 26 April 2025

Rocket Report: The pitfalls of rideshare; China launches next Tiangong crew

25 April 2025 at 11:00

Welcome to Edition 7.41 of the Rocket Report! NASA and its contractors at Kennedy Space Center in Florida continue building a new mobile launch tower for the Space Launch System Block 1B rocket, a taller, upgraded version of the SLS rocket being used for the agency's initial Artemis lunar missions. Workers stacked another segment of the tower a couple of weeks ago, and the structure is inching closer to its full height of 355 feet (108 meters). But this is just the start. Once the tower is fully assembled, it must be outfitted with miles of cabling, tubing, and piping and then be tested before it can support an SLS launch campaign. Last year, NASA's inspector general projected the tower won't be ready for a launch until the spring of 2029, and its costs could reach $2.7 billion. The good news, if you can call it that, is that there probably won't be an SLS Block 1B rocket that needs to use it in 2029, whether it's due to delays or cancellation.

As always, we welcome reader submissions. 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.

Fresh details on Astra's strategic pivot. Astra, the once high-flying rocket startup that crashed back to Earth with investors before going private last year, has unveiled new details about its $44 million contract with the Department of Defense, Space News reports. The DOD contract announced last year supports the development of Rocket 4, a two-stage, mobile launch vehicle with ambitions to deliver cargo across the globe in under an hour. While Astra's ill-fated Rocket 3 focused on launching small satellites into low-Earth orbit, Astra wants to make Rocket 4 a military utility vehicle. Rocket 4 will still be able to loft conventional satellites, but Astra's most lucrative contract for the new launch vehicle involves using the rocket for precise point-to-point delivery of up to 1,300 pounds (590 kilograms) of supplies from orbit via specialized reentry vehicles. The military has shown interest in developing a rocket-based rapid global cargo delivery system for several years, and it has a contract with SpaceX to study how the much larger Starship rocket could do a similar job.

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Reusable rockets are here, so why is NASA paying more to launch stuff to space?

24 April 2025 at 23:15

In an era of reusable rockets and near-daily access to space, NASA is still paying more than it did 30 years ago to launch missions into orbit, according to a study soon to be published in the scientific journal Acta Astronautica.

Launch is becoming more routine. Every few days, SpaceX is sending another batch of Starlink Internet satellites to orbit, and other kinds of missions fill up the rest of SpaceX's launch schedule. SpaceX, alone, has ample capacity to launch the handful of science missions NASA puts into space each year. If supply outpaces demand, shouldn't prices go down?

It's not so simple. NASA is one of many customers jockeying for a slot on SpaceX's launch manifest. The US military is launching more missions than ever before, and SpaceX is about to become the Pentagon's top launch provider. SpaceX already launches more missions for NASA than any other rocket company.

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Rocket Report: “No man’s land” in rocket wars; Isaacman lukewarm on SLS

11 April 2025 at 11:00

Welcome to Edition 7.39 of the Rocket Report! Not getting your launch fix? Buckle up. We're on the cusp of a boom in rocket launches as three new megaconstellations have either just begun or will soon begin deploying thousands of satellites to enable broadband connectivity from space. If the megaconstellations come to fruition, this will require more than a thousand launches in the next few years, on top of SpaceX's blistering Starlink launch cadence. We discuss the topic of megaconstellations in this week's Rocket Report.

As always, we welcome reader submissions. 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.

So, what is SpinLaunch doing now? Ars Technica has mentioned SpinLaunch, the company that literally wants to yeet satellites into space, in previous Rocket Report newsletters. This company enjoyed some success in raising money for its so-crazy-it-just-might-work idea of catapulting rockets and satellites into the sky, a concept SpinLaunch calls "kinetic launch." But SpinLaunch is now making a hard pivot to small satellites, a move that, on its face, seems puzzling after going all-in on kinetic launch and even performing several impressive hardware tests, throwing a projectile to altitudes of up to 30,000 feet. Ars got the scoop, with the company's CEO detailing why and how it plans to build a low-Earth orbit telecommunications constellation with 280 satellites.

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A military satellite waiting to launch with ULA will now fly with SpaceX

8 April 2025 at 00:08

For the second time in six months, SpaceX will deploy a US military satellite that was sitting in storage, waiting for a slot on United Launch Alliance's launch schedule.

Space Systems Command, which oversees the military's launch program, announced Monday that it is reassigning the launch of a Global Positioning System satellite from ULA's Vulcan rocket to SpaceX's Falcon 9. This satellite, designated GPS III SV-08 (Space Vehicle-08), will join the Space Force's fleet of navigation satellites beaming positioning and timing signals for military and civilian users around the world.

The Space Force booked the Vulcan rocket to launch this spacecraft in 2023, when ULA hoped to begin flying military satellites on its new rocket by mid-2024. The Vulcan rocket is now scheduled to launch its first national security mission around the middle of this year, following the Space Force's certification of ULA's new launcher last month.

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With new contracts, SpaceX will become the US military’s top launch provider

5 April 2025 at 03:33

The US Space Force announced Friday it selected SpaceX, United Launch Alliance, and Blue Origin for $13.7 billion in contracts to deliver the Pentagon's most critical military to orbit into the early 2030s.

These missions will launch the government's heaviest national security satellites, like the National Reconnaissance Office's large bus-sized spy platforms, and deploy them into bespoke orbits. These types of launches often demand heavy-lift rockets with long-duration upper stages that can cruise through space for six or more hours.

The contracts awarded Friday are part of the next phase of the military's space launch program once dominated by United Launch Alliance, the 50-50 joint venture between legacy defense contractors Boeing and Lockheed Martin.

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SpinLaunch—yes, the centrifuge rocket company—is making a hard pivot to satellites

4 April 2025 at 13:59

Outside of several mentions in the Rocket Report newsletter dating back to 2018, Ars Technica has not devoted too much attention to covering a novel California space company named SpinLaunch.

That's because the premise is so outlandish as to almost not feel real. The company aims to build a kinetic launch system that spins a rocket around at speeds up to 4,700 mph (7,500 km/h) before sending it upward toward space. Then, at an altitude of 40 miles (60 km) or so, the rocket would ignite its engines to achieve orbital velocity. Essentially, SpinLaunch wants to yeet things into space.

But the company was no joke. After being founded in 2014, it raised more than $150 million over the next decade. It built a prototype accelerator in New Mexico and performed a series of flight tests. The flights reached altitudes of "tens of thousands" of feet, according to the company, and were often accompanied by slickly produced videos.

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SpaceX just took a big step toward reusing Starship’s Super Heavy booster

3 April 2025 at 17:11

SpaceX is having trouble with Starship's upper stage after back-to-back failures, but engineers are making remarkable progress with the rocket's enormous booster.

The most visible sign of SpaceX making headway with Starship's first stage—called Super Heavycame at 9:40 am local time (10:40 am EDT; 14:40 UTC) Thursday at the company's Starbase launch site in South Texas. With an unmistakable blast of orange exhaust, SpaceX fired up a Super Heavy booster that has already flown to the edge of space. The burn lasted approximately eight seconds.

This was the first time SpaceX has test-fired a "flight-proven" Super Heavy booster, and it paves the way for this particular rocket—designated Booster 14—to fly again soon. SpaceX confirmed a reflight of Booster 14, which previously launched and returned to Earth in January, will happen on next Starship launch With Thursday's static fire test, Booster 14 appears to be closer to flight readiness than any of the boosters in SpaceX's factory, which is a short distance from the launch site.

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