US Air Force's secretive space plane lands after two years in orbit
Monday, May 8, 2017 - 14:51
in Astronomy & Space
After almost two years in orbit, the X-37B Orbit Test Vehicle has returned to Earth - but what has it been doing?
Updated by artificial intelligence Tue, 13 Jun 2023, 2:53:47 UTC Learn more
- Tell your friends
- Get science news via