Ever since it started taking to space, there has been a lot of mystery and controversy surrounding the USAF’s X-37B space plane. Despite the fact that this militarized version of NASA’s orbital vehicle has conducted several spaceflights since its first in 2010, we still have no idea what its true purpose is. But so far, the smart money believes it’s an advanced spy plane.
Click here for original story, Skywatcher and satellite tracker photographs US Air Force’s secret space plane in orbit
Source: Phys.org