The Space Force's mysterious X-37B space plane is set to lift off from Kennedy Space Center this week. Here's what we know about this secret mission.

The hunt will be on shortly, to once again recover a clandestine mission in low Earth orbit.

During its secretive mission, the X-37B will test new laser communications gear and a "quantum" navigation sensor.

OTV-8 is the third X-37B mission to launch on a SpaceX rocket. (Two have employed Falcon 9s and one lifted off on a Falcon ...