Swift, you spent a lifetime watching the biggest explosions in the universe. May your final descent create a brilliant spark of your own.
Swift began its watch on Nov. 20, 2004, when it lifted off aboard a Delta II rocket from here in Florida.
Science operations for our Neil Gehrels Swift Observatory have now ended.
With the spacecraft orbiting less than 171 miles (275 kilometers) above Earth, atmospheric drag prevents the satellite’s telescopes from steadily gazing at their cosmic targets. 🧵