An ageing NASA space telescope that a robotic spacecraft was sent to rescue in a failed mission this summer was due to meet a fiery end in Earth’s atmosphere on Wednesday, nearly 22 years after it was launched into orbit.
The Neil Gehrels Swift Observatory, weighing roughly 3,200 pounds (1,452 kilograms), was expected to tumble out of orbit and largely burn up as it fell back to Earth. NASA said fragments surviving re-entry were unlikely to threaten populated areas, and the US Space Force put the odds of harm coming to anyone on Earth at one chance in 2,100.
Swift had no onboard propulsion system of its own, and had been drifting towards its demise for months. NASA ended the observatory’s operations in late October to prepare for re-entry, after its orbit had fallen to about 171 miles (275 kilometres) above Earth.
Astronomers had hoped to extend Swift’s mission for several more years by giving the satellite a lift. In July, NASA and Arizona-based startup Katalyst launched a specially built rescue vehicle called LINK, designed to rendezvous with Swift, latch onto it and tug the observatory back into a higher, more sustainable orbit.
But the LINK spacecraft began spinning uncontrollably soon after reaching space, and by mid-August mission managers had abandoned the effort, resigned to letting Swift continue to its fate. Katalyst had designed, built and tested the vehicle on an unprecedented nine-month production schedule under a $30 million NASA contract.
The aborted rescue attempt, the first US mission of its kind, took on wider significance as a demonstration of a new orbital grappling technology seen as pivotal to the outcome of the US-China space race. It was closely watched as a trial run of a satellite-maintenance technology with potential dual-use military space applications.
Swift, a $500 million first-of-its-kind multi-wavelength space observatory, had been studying gamma-ray bursts and other cosmic phenomena since 2004, using its array of three telescopes. Gamma-ray bursts are the most powerful known explosions in the universe, emanating from the cores of distant galaxies.
Originally designed for a two-year prime mission, Swift remained in operation far longer, observing a wide range of cosmic objects, from galaxies powered by supermassive black holes and stars emitting X-ray flares, to comets and asteroids streaking through our own solar system.
The precise timing and location of the re-entry were not confirmed in the sources checked at the time of writing, and forecasts varied. The US Space Force predicted re-entry at about 3:30 a.m. EST (0830 GMT) on Wednesday, with an uncertainty of 11 hours, while the Aerospace Corporation predicted 10:19 UTC, plus or minus two hours. NASA said any surviving fragments would fall between 20.6 degrees south latitude and 20.6 degrees north latitude, a band spanning much of the tropics.
Note: the featured image is a NASA illustration of the Swift Observatory from 2005, not a photograph of the re-entry.
Sources: Reuters, “NASA’s Swift satellite telescope heads for fiery re-entry 22 years after launch”, 4 November 2026, https://www.reuters.com/science/nasas-swift-satellite-telescope-heads-fiery-re-entry-22-years-after-launch-2026-11-04/ ; NASA, “NASA’s Swift Observatory to Re-Enter Atmosphere”, 2 November 2026, https://science.nasa.gov/blogs/swift/2026/11/02/nasas-swift-observatory-to-re-enter-atmosphere/ ; The Aerospace Corporation, Swift re-entry prediction, https://aerospace.org/reentries/28485
