NASA's Neil Gehrels Swift Observatory reenters Earth's atmosphere

NASA’s Neil Gehrels Swift Observatory reentered Earth’s atmosphere over Indonesia at approximately 7:39 a.m. ET on Wednesday, November 4, 2026, according to data from the US Space Force cited by CNN and Space.com. The 3,200-pound spacecraft, which launched on November 20, 2004, had been in orbit for nearly 22 years.

Failed rescue mission

Earlier this year, NASA awarded a $30 million contract to Arizona-based Katalyst Space to design and operate a robotic spacecraft to extend the observatory's life. The company produced a three-armed spacecraft called LINK, which launched on July 3, 2026, with the goal of grappling the telescope and boosting it into a higher orbit. However, the mission failed a few weeks after launch as the satellite experienced problems with its propulsion system and orientation-maintaining reaction wheels, causing it to spin out of control.

Atmospheric drag and solar activity

The observatory's descent was accelerated by increased solar activity. As the sun reached the peak of its 11-year cycle in 2024, intense flares and coronal mass ejections caused Earth’s atmosphere to expand, increasing atmospheric drag on the spacecraft. NASA stated that the spacecraft was no longer able to compensate for the increased drag and entered safe mode. A team of researchers at Penn State, which serves as the observatory's Mission Operations Center, sent the final kill-switch command to Swift on October 20.

Scientific legacy

Originally designed for a two-year mission to study gamma-ray bursts, the Swift Observatory remained productive for over two decades. According to NASA, the observatory's contributions include:

• Studying over 1,400 supernova explosions.
• Observing more than 2,000 gamma-ray bursts.
• Monitoring asteroids, comets, and black holes.
• Contributing to approximately 7,000 scientific papers.

NASA's Neil Gehrels Swift Observatory ended science operations on October 23, 2026, according to BBC Newsround. While NASA predicted that most of the vehicle would burn up during reentry, the agency had previously stated the "risk of harm coming to anyone on Earth is unlikely, approximately 1 in 2,100."

Why it matters

Despite the loss of Swift, NASA has expressed interest in similar life-extension missions for other instruments. The agency recently issued a Request for Proposals (RFP) to commercial companies regarding how to boost or service the Hubble Space Telescope. According to the RFP, NASA analysis shows a 10% chance Hubble will deorbit by 2032 and a 50% chance by 2033.

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Sources

• cnn.com: NASA’s Swift Observatory has met a fiery end | CNN
• bbc.co.uk: Nasa telescope falling back to Earth after 22 years of dramatic discoveries - BBC Newsround
• space.com: NASA's Swift space telescope crashes back to Earth after failed rescue attempt | Space

This article was drafted with AI assistance and checked against the sources above. Company claims are reported as claims. Cover image is AI-generated.