U.S. Air Force Space Plane Has Reached The 500th Day In Orbit Milestone

One of the most mysterious craft ever to be flown by the US military has been in orbit for 500 days. The X-37B space plane, an experimental program run by the Air Force, launched atop a United Launch Alliance Atlas V rocket on May 20, 2015. Pictured is an artist's impression

Daily Mail: US Air Force's X-37B space plane reaches 500 days in orbit - and we STILL don't know its mission

* X-37B drone blasted off on a mysterious mission on May 20, 2015
* Theories range from it being a space bomber to destroying satellites
* The flight is testing a system that makes satellites easy to manoeuvre
* This is probably a small part of the vehicle's true mission, say experts

One of the most mysterious craft ever to be flown by the US military has been in orbit for 500 days.

The X-37B space plane, an experimental program run by the Air Force, launched atop a United Launch Alliance Atlas V rocket on May 20, 2015.

While some details of its payload have been revealed - we still do not know exactly what's on board.

Theories have ranged from it being a space bomber, to a clandestine probe on a mission to 'take out' spy satellites.

Read more ....

Update: Air Force's X-37B Space Plane Mystery Mission Wings by 500 Days in Orbit (Space.com)

WNU Editor: We will probably learn more on what it has been doing in space for 500 days in 50 or more years. But in the meantime .... the speculation is rife.