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NASA's Swift Observatory to End Mission in Fiery Reentry
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In Short: NASA's Swift Observatory, launched in 2004, will end its mission with a fiery reentry after a failed rescue attempt.
NASA's Swift Observatory, launched in 2004, is set to end its mission with a fiery reentry after a failed rescue attempt. The telescope, which has been indispensable for over two decades, is now falling uncontrollably due to atmospheric drag and recent intense solar activity.
Swift was originally in an orbit that ranged from 585 kilometers to 604 kilometers (364 to 375 miles) above Earth. However, the recent solar activity has accelerated its descent, and the Space Force is tracking its dwindling path.
The telescope, which was renamed the Neil Gehrels Swift Observatory in 2018 after its first principal investigator, has been observing gamma-ray bursts and other ultrahigh-energy events. It has contributed to about 7,000 published scientific papers.
Swift's mission was to study gamma-ray bursts, the most powerful explosions in the cosmos. Almost immediately after launch, Swift started making discoveries, says astrophysicist Lynn Cominsky of Sonoma State University.
The telescope's orbit has dropped to less than 171 miles (275 kilometers) above Earth, prompting NASA to shut down its operations. The X-ray Telescope aboard Swift captured its last image of Tycho’s supernova remnant on August 26, 2026.
NASA had initially predicted that Swift would remain above 185 miles (300 kilometers) until October, but recent solar activity has accelerated its descent. The observatory is now barely clinging to orbit, with reentry expected on or around Friday.
A rescue mission, involving a spacecraft commissioned by NASA to loft Swift out of danger, launched in early July. However, technical issues prevented a boost attempt, and the mission was called off on August 19.
The spacecraft, which is falling out of orbit roughly 340 kilometers above Earth, is expected to burn up in the atmosphere. Most of the 1 ½-ton telescope will incinerate upon descent, though dense tungsten components and mirror elements could survive reentry.
Swift has observed more than 2,000 gamma-ray bursts and studied over 1,400 supernova explosions. Its cosmic cremation has the Swift team mourning yet full of gratitude for the observations the telescope made during its 22 years in orbit.
The mission's data has contributed to about 7,000 published scientific papers, according to NASA officials. The Swift team hopes that the lessons learned from Swift can be applied to new generations of space missions to accelerate discoveries about the universe.
The Space Force will continue to track the telescope’s path as it approaches reentry. Any surviving wreckage is expected to plunge into the ocean, with the overwhelming majority of the platform burning into harmless ash across the upper atmosphere.
What this adds
The dramatic situation unfolded roughly 340 kilometers above Earth, where NASA’s Neil Gehrels Swift Observatory is losing altitude due to atmospheric drag and a recent bout of unusually strong solar activity.
NASA’s Swift Observatory, launched in 2004, is set to end its mission with a fiery reentry after a failed rescue attempt. The observatory’s orbit has dropped to less than 171 miles (275 kilometers) above Earth, prompting NASA to shut down its operations.
Background
NASA's Swift Observatory, launched in 2004, will end its mission with a fiery reentry after a failed rescue attempt.
NASA's Swift Observatory, launched in 2004, will end its mission with a fiery reentry after a failed rescue attempt.
What's confirmed
- During more than 22 years, the Swift Observatory made itself indispensable This artist’s rendition shows NASA’s Swift Observatory in orbit around Earth.
- In its later years, Swift observed between five and 10 “targets of opportunity” most days, tallying hundreds or even thousands in a year.
- WASHINGTON — NASA has shut down an astronomy spacecraft in a decaying orbit after a failed attempt to reboost it with a commercial spacecraft.
- But a handful of pieces made of denser-than-lead tungsten and some mirror parts could survive reentry, according to NASA's Brad Cenko, the mission’s chief scientist.
- “Our fervent hope is that the lessons learned by the successes of Swift can be applied to new generations of space missions to accelerate our discoveries about the universe,” Nousek said in an email.
- “We’ve known this day would come since before Swift was launched. At least in low-Earth orbit, what goes up must come down. And that end is catastrophic,” said Pennsylvania State University’s John Nousek, an astronomer who led the control team.
- Swift resumed observations once the rescue attempt was called off, discovering even more gamma ray bursts and other ultrahigh-energy events.
- NASA hired Katalyst Space a year ago to mount a rush rescue.
- The Space Force is tracking the telescope’s dwindling path.
- Intense solar activity over the past few years dragged Swift down faster than usual.
- Space Force predicts the Swift Observatory will come crashing down on or around Friday.
- Its cosmic cremation has the Swift team mourning yet full of gratitude for the observations the telescope made during its 22 years in orbit.
What's still developing
- As Swift’s tenure unfolded, astronomers started asking to borrow the nimble observatory to study a whole range of objects changing on the sky.
- NASA and Katalyst announced Aug. 19 that LINK would not proceed with capturing and boosting Swift.
- Katalyst sought to mount a similar mission to the 36-year-old observatory, and the Swift operation was meant to serve as a preview of that.
- Satellite servicing is a growing field, with government agencies and commercial companies around the world practicing high-flying maneuvers. (Tech billionaires are interested, too: Before he was appointed to the top job at NASA, administrator Jared Isaacman offered to mount a SpaceX mission to raise Hubble’s orbit.) “The technology to enable servicing is on a very good path,” says David Barnhart, an astronautical engineer at the University of Southern California in Los Angeles, citing advancements in rendezvous sensors, propulsion systems and, the all-important element, robotic arms.
- Use of the third instrument, the Burst Alert Telescope, was halted in April to reduce power consumption so Swift’s solar panels could be positioned to further reduce drag.
- While intact fragments occasionally survive intense thermal loads, the overwhelming majority of the 1 ½-ton platform will simply burn into harmless ash across the upper atmosphere. 💬 Orbital mechanics give aging spacecraft very little margin for error once rescue attempts fail. ✨ Tracking teams will stay locked onto the Swift Observatory through its final orbital revolutions as it marks the end of its mission. 📱 Drop your thoughts in the comments below : Are you tracking this week’s satellite reentry, or did the news take you by surprise?
- "Roman is exactly the kind of success story we want to see across NASA," said NASA Administrator Jared Isaacman.
- Using the images from the NASA/ESA/CSA James Webb Space Telescope, astronomers have discovered 24 previously shrouded outflows from newborn stars in the ‘ Cosmic Cliffs,’ a region within the stellar nursery NGC 3324.
- The weird weather pattern didn’t show up in years of observations by NASA’s Cassini mission An image captured by the Hubble Space Telescope shows a 10-sided atmospheric wave surrounding Saturn’s south pole, as seen on August 29, 2025.
- Using Hubble along with telescopes at the Fred Lawrence Whipple Observatory and the Roque de Los Muchachos Observatory, the researchers detected repeating patterns in Betelgeuse’s behavior.
- With the emergence of Starship, New Glenn, and SLS rockets, NASA engineers are reimagining what is possible for future space telescopes and our search for life in the universe.
- NASA administrator Jared Isaacman said at a postlaunch press conference that all systems appear nominal after launch.