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Sunday, October 25, 2026

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NASA · Sunday, October 25, 2026

NASA's Swift telescope ends its science work after 22 years

The File desk · Oct. 25, 2026, 6:41 a.m. ET

Confirmed1 primary sources

Status

Confirmed from NASA's article of Friday, Oct. 23, 2026. The spacecraft's science mission has ended. NASA says it is expected to re-enter in the next few weeks and does not, in this article, describe a danger on the ground.
  • Confirmed
    Swift took its last science observation on Oct. 20. It is now below 171 miles, too low for steady pointing.
  • Confirmed
    NASA launched it on Nov. 20, 2004, for a two-year mission.
NASA's Neil Gehrels Swift Observatory has stopped doing science. The spacecraft is now less than 171 miles up, too low for its telescopes to hold a steady gaze, and it took its last look on Oct. 20. NASA launched it on Nov. 20, 2004.1
Swift was built for a two-year job and kept working for more than ten times that long, Shawn Domagal-Goldman, director of NASA's astrophysics division, said in the article. In that time it observed more than 2,000 gamma-ray bursts, the brightest explosions astronomers record. It studied more than 1,400 supernovae. NASA says Swift data contributed to about 7,000 published papers.2
Why it matters (Estimate). Swift was the satellite astronomers used when a star exploded and they had only minutes to point something at it. Those alerts fed thousands of papers. With the telescopes no longer able to hold a target, that rapid watch on the violent sky is over, and the spacecraft itself is on the way down.
The article says Swift is expected to re-enter the atmosphere in the next few weeks. It does not describe a risk to people on the ground.
How we know

Notes

  1. 1.NASA, “NASA's Swift Mission Ends,” Oct. 23, 2026. https://science.nasa.gov/missions/swift/nasas-swift-mission-ends/ “NASA's Neil Gehrels Swift Observatory has ended its science mission now that the spacecraft is orbiting less than 171 miles (275 kilometers) above Earth's surface.” “Swift conducted its final observation on Oct. 20. It is expected to re-enter the atmosphere in the next few weeks.” Launched Nov. 20, 2004. An illustration on the page is credited to NASA's Goddard Space Flight Center Conceptual Image Lab. This story does not reproduce it.
  2. 2.Same article. Shawn Domagal-Goldman: designed for a two-year primary mission “but productive for more than 10 times as long.” “Swift has observed more than 2,000 gamma-ray bursts.” “It has studied more than 1,400 supernova explosions.” “Swift data has contributed to about 7,000 published scientific papers.”

What is still unknown or disputed

  • The day of re-entry. NASA says the next few weeks and does not give a date.
  • Where any surviving pieces would fall. Not in the article, and not speculated on here.
  • Which observatory picks up the gamma-ray alerts Swift used to catch. Not in the article.

Primary sources

Every claim in this story is drawn from the documents below. If a fetch failed, that is recorded on the card.

  1. Source 1

    NASA's Swift Mission Ends

    NASA · October 23, 2026

    Swift ended science operations after its final observation on Oct. 20, orbiting below 171 miles.

    https://science.nasa.gov/missions/swift/nasas-swift-mission-ends/