It is the second flight of the second Boeing X-37B vehicle and the fourth flight of the program. United States Air Force Orbital Test Vehicle is an unmanned 5000 kg, 8.8 m-long reusable mini-spaceplane capable of autonomous re-entry and landing. The OTV-4 mission was to test Aerojet Rocketdyne's XR-5A Hall-effect thruster and conduct a NASA investigation for testing various materials in space. The mission concluded after 717 days in orbit, marking the first time X-37B landed on the Shuttle Landing Facility at the Kennedy Space Center.
Low Earth OrbitA SpaceX Falcon 9 rocket launched the eighth Dragon spacecraft on the sixth operational cargo delivery mission to the International Space Station. The flight was conducted under the Commercial Resupply Services contract with NASA.
Low Earth Orbit B1015 - Maiden Flight Just Read the Instructions (Original)