All Stacked UpCredit: USAFThe U.S. Air Force’s X-37B space plane prototype, called the Orbital Test Vehicle 1, is primed for its debut launch into space in April 2010.  space.com

All Stacked UpCredit: USAFThe U.S. Air Force’s X-37B space plane prototype, called the Orbital Test Vehicle 1, is primed for its debut launch into space in April 2010. space.com

Cosmos: nuestro espacio: 600 días en órbita: el dron espacial secreto de EE...

Cosmos: nuestro espacio: 600 días en órbita: el dron espacial secreto de EE...

The X-37 and X-40 research efforts were originally started (by NASA and U.S. Air Force, respectively) as completely separate and unrelated programs. However, both programs have since been merged into a single one. Therefore they are both discussed on this page.

The X-37 and X-40 research efforts were originally started (by NASA and U.S. Air Force, respectively) as completely separate and unrelated programs. However, both programs have since been merged into a single one. Therefore they are both discussed on this page.

US military’s mysterious X-37B space plane passes 500 days in orbit, but we still have no clue what it’s actually doing up there.

US military’s mysterious X-37B space plane passes 500 days in orbit, but we still have no clue what it’s actually doing up there.

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