Air Force space plane X-37B passes 400 days in orbit
Thursday, January 30, 2014 - 16:01
in Astronomy & Space
The U.S. Air Force's unmanned X-37B space plane has now circled Earth for more than 400 days on a hush-hush mission that is creeping closer and closer to the vehicle's orbital longevity record.The X-37B spacecraft launched on Dec.