After two delays in two days, Nasa has finally launched the Link spacecraft tasked with preventing one of its most successful space telescopes from gradually falling back to Earth.

A first-of-its-kind mission to raise the orbit of NASA’s Neil Gehrels Swift Observatory is poised for launch no earlier than Thursday, July 2, 5:09 a.m. EDT

A three-armed spacecraft is rushing to the rescue of a NASA telescope that’s in danger of crashing back to Earth.