A Robotic Spacecraft Is Racing to Catch a Falling NASA Telescope in Orbit

A Space Telescope on the Brink

For more than two decades, NASA's Neil Gehrels Swift Observatory has been circling Earth studying gamma-ray bursts — the most powerful explosions in the universe, triggered by events like the births of black holes and collisions between ultra-dense stars. Now, the beloved telescope is in serious trouble. Swift has been falling toward Earth for months — not because anything went wrong, but because decades of atmospheric drag and a recent surge in solar activity have pulled the 22-year-old gamma-ray telescope lower and faster than anyone anticipated.

NASA's prediction models suggest that the telescope's orbit could drop to an altitude considered critically low — below 185 miles — in October. Swift may be one big solar storm away from doom if the sun fires off a major storm before a rescue spacecraft can reach it, and it is on track to fall below an altitude of 186 miles by October. At that point, the telescope's fate would essentially be sealed.

A First-of-Its-Kind Rescue Mission

A first-of-its-kind mission to raise the orbit of the Swift Observatory is set to launch today, Thursday, July 2, at 5:09 a.m. EDT from Kwajalein Atoll in the Marshall Islands. A robotic servicing spacecraft called LINK, built by Katalyst Space, will blast into orbit on a Northrop Grumman Pegasus XL rocket attached to the belly of the Stargazer aircraft. After launch, LINK will attempt to rendezvous with, grapple, and slowly raise Swift's altitude over several months, preventing it from re-entering Earth's atmosphere later this year. The launch has already been delayed twice by unfavorable weather conditions.

LINK is roughly the size of a refrigerator, equipped with three ion engines, three robotic arms, and a suite of sensors — built from a blank sheet of paper to a flight-ready vehicle in nine months. To save Swift, NASA hired Arizona-based Katalyst Space Technologies to build LINK, giving the company just nine months to design, construct, test, and launch a satellite to do something that has never been done: grab a spacecraft that was not designed to be serviced, then carry it back to its original orbit. "Frankly, I have to be honest: No one thought it was going to be possible," said Shawn Domagal-Goldman, NASA's Astrophysics Division director.

The High-Stakes Capture

The capture is the riskiest stage of LINK's mission. The tentative plan is for the spacecraft's robotic arms to grasp solid metal panels on the corners of Swift. But the observatory is covered in something like aluminum foil for thermal insulation, and no one knows what state this layer is in because no one has seen Swift up close for 20 years. When LINK arrives in orbit, it will first do a photoshoot, imaging Swift in different orientations and lighting conditions to figure out which part it should try to grasp.

Rather than accept the loss, NASA awarded a $30 million contract in September 2025 to Katalyst Space Technologies to design, build, and launch a rescue mission in less than a year. That investment looks modest compared to what's at stake. If the LINK mission succeeds, it will restore a $300 million satellite — in 2004 dollars — to full capability for only $30 million in today's dollars. Success would give Swift at least five additional years of operation and provide a blueprint for future rapid-response servicing contracts.

What It Means Beyond Swift

If this daring mission is successful, it will be the first time a commercial robotic mission has captured a NASA spacecraft that is both uncrewed and not originally designed to be serviced in space. That precedent could reshape how the space industry thinks about aging satellites. Katalyst CEO Ghonhee Lee put it plainly: "Swift wasn't designed to be serviced. By demonstrating we can quickly and cost-effectively extend its lifetime, we're creating a blueprint for servicing spacecraft that were never designed for on-orbit maintenance."

The full orbit-raising process is expected to take several months, meaning Swift's return to science operations is unlikely before late 2026 at the earliest. But the implications stretch far into the future. As space agencies and private companies increasingly rely on long-duration missions, the ability to repair or reposition satellites could become critical. If LINK succeeds today, it won't just save one telescope — it will prove that no satellite in low-Earth orbit ever has to be written off as lost again.