🚀 ~ Mysterious Spacecraft Has Been Orbiting Earth During Past 720 Days, and Only the US Air Force Knows Why (strangesounds) ~ | .. A mysterious spacecraft has been orbiting the Earth for the past 720 days… And only the US Air Force knows why .. |

A mysterious spacecraft has been orbiting the Earth for the past 720 days, and only the US Air Force knows why. Picture: defense.org

This is the fifth mission of the X-37B space plane, an uncrewed and solar-powered military drone. The Orbital Test Vehicle 5 (OTV-5) mission launched way back on September 7, 2017, with the help of a SpaceX Falcon 9 rocket.

On the fourth mission – Orbital Test Vehicle 4 (OTV-4) – it remained in orbit for 717 days, 20 hours, and 42 minutes, which it has now surpassed, with no details yet on when the mission may end.


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