NASA's Swift ends operations, heads for fiery reentry

NASA's Swift observatory made its final observation on October 20 and will re-enter the atmosphere within weeks as atmospheric drag lowers its orbit. Launched in 2004 on a two-year mission, the telescope operated for almost 22 years and detected over 2,000 gamma-ray bursts and 1,400 supernovae.

• Swift's final observation was on October 20; reentry expected within weeks
• Launched November 20, 2004 on a two-year mission, it lasted almost 22 years
• Swift observed over 2,000 gamma-ray bursts and more than 1,400 supernovae
• Katalyst Space's orbit-boost mission never happened; Swift has no propulsion