A Robot Is Being Launched Today to Rescue a Falling NASA Telescope

A 20-Year-Old Telescope on the Brink

The Neil Gehrels Swift Observatory is a three-instrument gamma-ray telescope that has spent more than two decades monitoring the cosmos, detecting roughly 100 gamma-ray bursts per year. But after all that time in orbit, it's now in serious danger. Swift has been sinking faster and faster because of recent intense solar activity and needs to get to a higher, more stable orbit as soon as possible to survive. Without an orbital boost, Swift has a 90% chance of reentering Earth's atmosphere before the end of 2026.

When Swift launched in 2004, it was placed into a circular orbit with altitudes between 585 and 604 kilometers. Over the 21 years it has been operating, its altitude has dropped to just 373 to 378 kilometers. To slow the descent, the operations team at Penn State altered how they managed the spacecraft — selecting observation targets that steer Swift into the most streamlined position and reducing power consumption to place its large solar panels in a more aerodynamic orientation. Those workarounds bought some time, but not enough. A more dramatic solution was needed.

The $30 Million Rescue Plan

The $30 million salvage operation got underway this week with the planned launch of a robotic lifesaver — a spacecraft built by startup Katalyst Space Technologies, hired by NASA to boost the Swift Observatory to a higher orbit where it can continue hunting for some of the universe's biggest explosions. The mission is scheduled to launch no earlier than today, Wednesday, July 1, at 5:43 a.m. EDT from Kwajalein Atoll in the Marshall Islands. A robotic servicing satellite called LINK, built by Katalyst Space, will blast into orbit on a Northrop Grumman Pegasus XL rocket, then rendezvous with, grapple, and slowly raise Swift's altitude over several months.

LINK is a 1.6-ton spacecraft equipped with three robotic arms. After deployment, LINK will undergo two weeks of checkouts, then spend two to three weeks rendezvousing with and inspecting Swift, followed by one to two weeks docking with the telescope. The boost phase of the mission is then expected to last around three months. The spacecraft will spend that time slowly raising Swift's orbit from 224 miles to 373 miles, potentially returning the telescope to science operations by September.

Swift Is Irreplaceable — and Overdue for a Rescue

While not every satellite in distress can be saved, Swift is special. True to its name, Swift is designed to pivot quickly to capture late-breaking astronomical events such as gamma-ray bursts and exploding stars. With more discoveries expected by the Webb Space Telescope and the soon-to-launch Roman Space Telescope, Swift, if saved, would be busier than ever as "NASA's first responder." The observatory has cost $500 million to build, launch, and operate as of 2026.

If this daring servicing mission is successful, it will be the first time a commercial robotic mission has captured a NASA spacecraft that is uncrewed and not originally designed to be serviced in space. As Katalyst CEO Ghonhee Lee put it, "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 development timeline alone is staggering: Katalyst completed environmental testing just eight months after the contract was awarded — a process that typically takes 24 months.

A New Era for Space Sustainability

Today's launch also marks the 46th and presumably final mission for the Pegasus XL rocket — itself a piece of aerospace history, having debuted in 1990. Pegasus was deemed the only system able to meet all orbit, timeline, and budget requirements, thanks to its pioneering air-launched design that delivers payloads to low Earth orbit with flexibility and speed that many other rockets cannot match. NASA's Hubble Space Telescope — also at risk of orbital decay — could be next in line for a similar rescue.

Katalyst sees Swift as the jumping-off point for an entirely new repair business in space. The company's next-generation robotic rescuer, scheduled to fly next year, will tackle satellites as high as 22,300 miles up. The company's CEO envisions hundreds of robots in orbit one day — not only fixing and hoisting satellites, but also refueling them and building solar farms, data centers, and other platforms. Whether today's launch succeeds or not, it signals a fundamental shift in how humanity thinks about the tools it sends into space: not as disposable hardware, but as assets worth fighting to keep.