A revolutionary NASA telescope is making its way back to Earth—but will not survive the journey. The United States Space Force has honed its estimate for the Neil Gehreis Swift Observatory’s fiery atmospheric reentry.

Most of the spacecraft will burn up as it reenters Earth’s atmosphere. Some of the bigger, heavier pieces, however, are expected to survive all the way to the surface on its reentry.

The Swift Observatory is expected in the coming days to plummet back to Earth, with some it potentially surviving the fiery descent. What to know.

Nasa's Neil Gehrels Swift Observatory has spent 22 years observing some of Space's most dramatic events, now its mission has ended.