NASA's Neil Gehrels Swift Observatory, a rapid-response space telescope, is gradually losing altitude as its orbit decays. A daring mission planned for this summer aims to reverse that decline by sending a dedicated spacecraft to rendezvous with Swift and raise it to a higher orbit. This would mark the first time such a servicing operation has been attempted for an orbiting telescope.
The observatory has been scanning the cosmos for gamma-ray bursts and other high-energy events since its 2004 launch. Without intervention, the telescope would eventually burn up in Earth's atmosphere, ending more than two decades of scientific observations. The planned boost could grant Swift many additional years of operation.
According to the mission description, the spacecraft will launch from Earth and execute a precision rendezvous with Swift before performing the orbital adjustment. No cost estimates or specific altitude targets have been disclosed. The operation carries inherent risks, including the potential for debris or collision.
If successful, the technique could open the door to similar life-extension missions for other aging satellites, shifting how agencies manage space assets. Astronomers who rely on Swift's rapid-response capabilities for time-sensitive observations would gain continued access to a unique instrument.
Critics of orbital servicing point to the complexity and cost of such missions, questioning whether resources might be better spent on newer telescopes. The outcome of this summer's attempt will likely shape future debates on satellite maintenance versus replacement.