NASA launches daring $30M rescue to save Swift telescope from Earth's pull

NASA is about to attempt something no American space agency has ever tried: sending a robot to catch a falling telescope and push it to safety. The Swift Observatory, which has spent more than two decades scanning the sky for gamma ray bursts and exploding stars, is sinking toward Earth. Solar activity has intensified in recent months, dragging the spacecraft down faster than anyone predicted. By October, it will cross a point of no return—below 185 miles altitude, where the atmosphere will pull it apart. The space agency has hired a startup called Katalyst Space Technologies to prevent that from happening. A robotic spacecraft named Link, built by the company, is scheduled to launch as early as this week from the Marshall Islands aboard a Pegasus rocket. If everything works, it will chase Swift down, grab it with three mechanical arms, and haul it up to a safer orbit 373 miles above Earth.

Swift was never designed for this. Launched in 2004, the telescope cost hundreds of millions of dollars and was built to observe, not to be serviced. No one expected it would need rescuing. But the sun has other plans. As solar flares intensify, they heat Earth's upper atmosphere, making it denser and more resistant to satellites passing through. Swift has been sinking faster and faster. NASA bought time by shutting down all of the telescope's scientific instruments in February, slowing its descent. But that's a temporary measure. The rescue mission represents a gamble—a $30 million bet that a machine can do something that has never been done before in American spaceflight.

Katalyist's Link is roughly the size of a small refrigerator with a 40-foot solar wingspan. Its three arms, each reaching just over three feet, are tipped with finger-like grippers that resemble Lego hands. The spacecraft will need about a month to rendezvous with Swift and catch it, then another couple of months to raise its orbit. If successful, Swift could resume observations by September. The challenge is extraordinary. Swift is a delicate instrument, and Link has never done this before. There is no guarantee it will work. "No one thought it was going to be possible," said Shawn Domagal-Goldman, NASA's astrophysics director. "No one thought we would get as far as we've already gotten today."

What makes this mission worth the risk is what Swift does. True to its name, the telescope is designed to pivot quickly toward sudden astronomical events—gamma ray bursts, supernovae, the violent deaths of stars. It is, in effect, NASA's first responder to the universe's most dramatic moments. With the James Webb Space Telescope already in orbit and the Roman Space Telescope launching soon, Swift's role will only become more important. If the telescope falls, NASA loses not just an instrument but a capability it cannot easily replace. "We don't currently have the budget to build another one," said Nicky Fox, NASA's science mission chief.

The rescue of Swift is also a proof of concept. Only China has attempted a satellite servicing mission like this before, successfully boosting a satellite to a graveyard orbit four years ago. If Katalyst succeeds, it opens a new chapter in spaceflight. The company sees this as the beginning of a repair industry in orbit. Its next-generation robot, still in development, could reach satellites as high as 22,300 miles up. Katalyst's CEO Ghonhee Lee envisions hundreds of robots in space one day, not only fixing and boosting satellites but refueling them, building solar farms, and constructing data centers. The Hubble Space Telescope, which is also losing altitude due to solar activity, could be next. Hubble is 36 years old and has been serviced before by spacewalking astronauts during the shuttle era. "It's a national treasure," Fox said. "People love Hubble." If Link succeeds with Swift, Hubble could receive a life-extending boost in 2028. The question now is whether a machine can do what humans once did—and whether it can do it in time.