NASA Launches Mission to Save Aging Swift Space Telescope from Atmospheric Reentry
The Neil Gehrels Swift Observatory, a NASA space telescope operational for nearly 22 years, has been crucial in detecting gamma-ray bursts, intense energy flashes from extreme cosmic events like massive star collapses and neutron star collisions. These detections alert telescopes worldwide to study such phenomena in real time. However, increased solar activity and atmospheric drag have caused the telescope to lose altitude faster than expected, risking uncontrolled reentry as soon as this fall.
To prevent the premature loss of this vital research instrument, NASA issued an urgent call last year for a technological rescue solution. In September, Arizona-based Katalyst Space Technologies was selected and given only nine months to design, build, and launch a dedicated rescue spacecraft. The resulting "Swift Boost" mission launched on July 3 at 4:36 a.m. Eastern Time from Kwajalein Atoll in the Marshall Islands after several weather and software-related delays.
The launch was unconventional: the robotic spacecraft named LINK was mounted on a Pegasus XL rocket attached beneath a Stargazer L-1011 aircraft. The plane ascended to about 40,000 feet over the Pacific Ocean before releasing the rocket, which ignited and propelled LINK directly into Swift's orbit. NASA confirmed successful contact with LINK shortly after launch.
In the coming weeks, LINK will undergo system checks before approaching Swift. The mission's most challenging phase will be capturing the telescope using three robotic arms and docking with it, despite Swift never being designed for servicing or docking. If successful, LINK will slowly raise Swift’s orbit to approximately 600 kilometers, extending its operational life by about ten years.
NASA emphasizes that not every satellite losing altitude warrants a rescue mission. Sean Domagal-Goldman, head of NASA’s Astrophysics Division, stated, "This is not just another spacecraft; it’s a unique astrophysical observatory." The mission could pioneer future satellite servicing, potentially allowing aging satellites to be refurbished and extended rather than discarded when their orbits decay.
