Swift's 22-year mission ends in orbit

Launched on November 20, 2004, the Neil Gehrels Swift Observatory was designed to detect and study gamma-ray bursts, the most energetic explosions in the universe. It far exceeded its expected lifespan.

Solar activity accelerated its descent

In 2024, increased solar activity heated and expanded Earth's upper atmosphere, increasing drag on the satellite and accelerating its descent. Without a propulsion system to correct its orbit, its days were numbered.

Rescue mission failed in August

In July 2026, NASA launched a thirty million dollar mission to rescue Swift. A robotic spacecraft called LINK was supposed to drag Swift away from Earth by 150 miles, but it failed due to control…

Swift's final observation and shutdown

On October 26, NASA announced Swift was less than 170 miles from Earth's surface. The telescopes could no longer maintain stable observations. Swift conducted its final observation on October 20, then operations ended.

A legacy of cosmic discovery

In its lifetime, Swift observed over 2,000 gamma-ray bursts and nearly as many supernovas. Data from these observations contributed to more than 7,000 research papers. Its archive will fuel discoveries for decades more.

“Swift delivered an incredible, lasting return on investment for the nation, designed for a two-year primary mission but productive for more than 10 times as long.”

Most debris will burn up on reentry

The US Space Force estimates Swift will crash on or around Friday, November 6.Most of the observatory is expected to disintegrate as it reenters the atmosphere.Some pieces made of tungsten and telescope mirrors could survive.

Debris likely to fall in ocean

Large areas of Africa, Australia, India, Southeast Asia, and Central and South America fall within the reentry zone. However, it is most likely that all Swift's remaining pieces will end up in the ocean.