The Swift observatory has spent nearly two decades peering into the most violent explosions in the universe. Now it’s falling. And NASA is attempting something no one has ever done before.
A Race Against Physics
The situation was becoming urgent. Swift, the gamma-ray burst hunting telescope, launched in 2004 with no thrusters to maintain its orbit. Nearly twenty-two years later, aerodynamic drag has been slowly pulling it downward. The spacecraft that once flew at 363 miles above Earth had dropped to just 225 miles. Without intervention, it would burn up in the atmosphere sometime this fall.
But here’s what makes this story special: NASA decided to try saving it.
“I consider this a success already, just from the fact that we’re even going to try this,” said Shawn Domagal-Goldman, director of NASA’s astrophysics division. That’s quite a statement from someone overseeing what everyone acknowledged was a long shot.
The challenge was daunting. Swift is losing altitude faster than anticipated thanks to recent solar activity, which puffs up Earth’s upper atmosphere and increases drag on low-orbiting satellites. NASA estimated the spacecraft would fall below the safe approach threshold of 186 miles around October. That gave them less than a year to design, build, and launch a rescue mission.
Enter Katalyst
NASA asked three companies if they could pull off what sounded like science fiction: build a satellite to chase down an unprepared spacecraft and boost its orbit using robotic arms. Katalyst Space Technologies, a startup founded in 2020, came back with the most compelling proposal.
They didn’t have luxury of time. NASA’s normal process for soliciting mission proposals can take months or even years. This time, they skipped that entirely and directly contacted teams already on contract for technology development work.
“We didn’t send out a solicitation because we didn’t have time to,” Domagal-Goldman explained. That’s the kind of practical urgency that usually gets smothered in bureaucratic process.
Katalyst was already working on a commercial servicing demonstration. They pivoted that private investment toward NASA’s immediate need, accepting additional risk to meet an impossible deadline. In some cases, suppliers couldn’t deliver parts fast enough, so Katalyst engineers built components in-house. The test campaign got streamlined. Everything got compressed.
“We’re in an unusual situation where the schedule dictates how much risk we’re willing to accept, rather than the other way around,” said Kieran Wilson, Link’s principal investigator at Katalyst. That admission is surprisingly honest for a project of this magnitude.
The Last Pegasus Flight
The Link servicing spacecraft weighs just under a half-ton, perfect for Northrop Grumman’s Pegasus XL rocket. This is significant because it’s the final Pegasus mission scheduled to fly after 45 missions since 1990. The rocket was originally ordered by Stratolaunch, the company founded by late Microsoft co-founder Paul Allen, but became available after his death in 2018.
Swift’s unusual orbit, swinging between 20 degrees north and south latitude, made it hard to reach from Cape Canaveral without a dedicated expensive launch. The air-launched Pegasus offered the flexibility needed.
The launch is set for June 27 from the remote equatorial Pacific Ocean near Kwajalein Atoll. The L-1011 carrier jet will release the rocket at about 39,000 feet, then three solid-fueled motors will carry Link to orbit.
What Happens Next
If everything works, Link will chase down Swift, grab it with three robotic arms, and boost the observatory back to a safe altitude. It would be the first time a servicing spacecraft has captured an unprepared satellite in orbit.
“This is really a blueprint for commercial and government partnerships,” said Robert Lamontagne, vice president for strategic partnerships at Katalyst.
But let’s be real. This is space. Things go wrong. The schedule was brutally compressed, testing was streamlined, and there are plenty of residual risks ahead. The team is optimistic, but they’ve earned that optimism through hard work and some necessary risk-taking.
What stands out here isn’t just the technical achievement, though that’s remarkable. It’s the mindset shift. NASA looked at a dying spacecraft and asked “why not?” instead of “can we?” Sometimes that’s exactly what space exploration needs.
This article is based on reporting from Ars Technica.
The clock is ticking, and by all accounts, the people involved are ready to meet it.
