Important Innovations Collection: Mystery USAF Space Plane

US Air Force's X-37B Mystery Space Plane

Source:  US Air Force

Now 700 Days in Orbit on its Fifth Mission
The X-37B, the US Air Force's mystery space plane, has been circling the Earth for the past 700 days on its fifth classified mission.  The space plane is solar powered, robotic and reusable.  The Air Force says it is testing technology for future reusable spacecraft missions and also carries scientific experiments.  But beyond that, the mission is a mystery.  For a great news blog, go to
Important Innovations Collection: Mystery USAF Space Plane: 700 Days into a Secret Mission Source:  US Air Force X-37B Military Space Plane The US Air Force's X-37B space plane has been orb...

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