NASA's 3,200-Pound Swift Telescope Burns Up Over Indonesia

The 3,200-pound Swift space telescope reentered Earth's atmosphere at 7:39 a.m. ET on Tuesday, November 4, over the North Sumatra region of Indonesia. NASA confirmed the instrument crashed back to the planet after spending nearly 22 years in orbit. Much of the observatory burned up during the descent. NASA stated that some components are expected to survive and may be found scattered across different hemispheres.

NASA and the U.S. Space Force tracked the reentry path. The agency predicted the event would occur around 3:30 a.m. EST on November 4, with an 11-hour window of uncertainty on either side. NASA previously assessed the risk of harm to people on Earth as unlikely, placing the odds at approximately 1 in 2,100.

Launched almost exactly 22 years ago, the Swift Observatory operated in low-Earth orbit. Its primary mission was to detect gamma-ray bursts and supernovas. The telescope was named for its ability to swerve rapidly toward such cosmic events. Although initially designed for a two-year mission, the instrument continued operations until late October. Solar activity eventually dragged the spacecraft back down toward Earth.

Katalyst Space was contracted by NASA in July to rescue the wayward instrument. The company dispatched a three-armed robot named Link to push the telescope back into a stable orbit. The robot encountered trouble shortly after launch and could not get within seven miles of the target. The robot fell back to Earth in September, and officials decided in August that the Swift observatory would return to the planet. The telescope continued returning observations until late October, when NASA determined it was too low to remain steady. Systems were shut down at that time.

During its operational life, Swift observed more than 2,000 gamma-ray bursts and 1,400 exploding stars. NASA described the telescope as a first responder for the Hubble and Webb space telescopes. Swift issued alerts to those facilities, which then conducted deeper investigations into the detected events.

John Nousek, an astronomer at Pennsylvania State University who led the control team, addressed the end of the mission on Monday. He noted that scientists have known this day would arrive since before the launch. Nousek stated that in low-Earth orbit, what goes up must come down. He expressed hope that lessons from the mission will be applied to new space missions to accelerate discoveries about the universe.

NASA said in a blog post that Swift broadened understanding of cosmic objects, including active galaxies powered by supermassive black holes, stars undergoing X-ray flares, and comets and asteroids in the solar system. Scientists are currently working to determine how to replace the specific work performed by the Swift observatory.