The robotic X-37B has been circling Earth for nearly 719 days on its latest mystery mission, which is known as Orbital Test Vehicle 5 (OTV-5).
Source: https://www.livescience.com/x-37b-military-space-plane-otv5-duration-record.html
Only the Autodidact is Free
The robotic X-37B has been circling Earth for nearly 719 days on its latest mystery mission, which is known as Orbital Test Vehicle 5 (OTV-5).
Source: https://www.livescience.com/x-37b-military-space-plane-otv5-duration-record.html