US Air Force's X-37B space plane reaches 500 days in orbit despite unknown mission


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.¬†

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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

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

X-37B’S MYSTERY MISSIONS¬†

The U.S. Air…



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