The Boeing X-37B is a classified Space Force spaceplane that spends years in orbit, then lands itself on a runway - and its seven missions are rewriting the rules for reusable spacecraft.
The Boeing X-37B has autonomously landed on a runway after missions lasting up to 908 days in orbit, blending aviation and spaceflight engineering across seven missions since 2010.
The Boeing X-37B has completed six fully autonomous orbital missions since 2010 - including one lasting 908 days - and lands itself on a runway every time.
The Air Force's X-20 Dyna-Soar was a pilot-flown reusable orbital spacecraft canceled in 1963 - and its engineering legacy directly shaped the Space Shuttle, X-37B, and Dream Chaser.
Sierra Space's Dream Chaser is a lifting-body spaceplane that lands on a runway like an airplane, returning fragile cargo gently instead of splashing into the ocean.