NASA is preparing to launch a $30 million mission to extend the operational life of the Neil Gehrels Swift Observatory, a space telescope that has been monitoring high-energy cosmic events for more than two decades. The observatory, which was launched in November 2004, is descending toward Earth faster than anticipated due to increased atmospheric drag exacerbated by recent solar activity.

The Swift telescope, weighing approximately 1.5 tonnes, has experienced an accelerated loss of altitude after solar flares heated and expanded the Earth’s upper atmosphere. This expansion increased the density of particles in the telescope’s low-Earth orbit, creating drag that the spacecraft—lacking its own propulsion system—is unable to counteract. Swift currently orbits at about 230 miles above Earth but must be boosted to a safer altitude of roughly 370 miles to avoid re-entry, which is expected by October if no intervention occurs.

NASA has contracted Katalyst Space, a startup based in Flagstaff, Arizona, to undertake the mission. The plan involves deploying an autonomous robotic servicing spacecraft called Link, which will launch aboard a Northrop Grumman Pegasus XL rocket from Kwajalein Atoll in the Marshall Islands. After spending roughly a month rendezvousing with Swift, Link will use its three robotic arms to grapple the observatory—despite Swift not being originally designed for in-orbit servicing—and employ its own thrusters to elevate the telescope back to its nominal orbit.

Ghonhee Lee, Katalyst’s CEO, described the operation as a pioneering effort: “This is the first American space robot to go up and do anything like this,” highlighting the mission’s innovative nature and its potential as a model for future satellite servicing missions.

NASA emphasizes Swift’s unique capability to quickly respond to transient cosmic phenomena by capturing data across multiple wavelengths, including visible light, ultraviolet, X-ray, and gamma rays. The observatory has been instrumental in studying gamma-ray bursts, black hole events, and other astrophysical phenomena. Saving the telescope not only preserves this vital scientific asset but also serves as a demonstration of new technologies that could enable spacecraft to be refueled or repaired, extending their operational lives.

Looking ahead, similar orbital boosts could support other aging assets such as the Hubble Space Telescope, which is also experiencing orbital decay. Currently, only China has accomplished a comparable in-orbit satellite servicing feat, involving moving a defunct satellite to a higher “graveyard” orbit.

The mission occurs as low-Earth orbit becomes increasingly congested with satellites, particularly mega-constellations like SpaceX’s Starlink, which alone comprises over 10,000 satellites. As more spacecraft enter and eventually leave this orbital region, concern is growing about the environmental impact of satellite re-entry debris. While atmospheric drag is commonly used as a disposal method, the materials released upon re-entry may pose risks to the atmosphere, including potential damage to the ozone layer.

Researchers such as Leonard Schulz from Technische Universität Braunschweig are calling for greater transparency regarding the compositions of satellites and rocket stages to better assess the ecological implications of re-entry events. The lack of detailed information from commercial operators complicates these efforts.

The Swift rescue mission was rapidly developed after NASA awarded the contract to Katalyst in September 2025. The project progressed from initial concept to impending launch in less than a year, illustrating a quick response to an urgent problem. NASA described the development as evolving from “a PowerPoint presentation” to a fully realized mission ready for execution, underscoring a growing emphasis on satellite servicing in the evolving space landscape.