X-37B
AgencyUS Space Force
Year2010
TypeReusable military spaceplane
RocketAtlas V / Falcon 9
CountryUSA
About the Mission
A robotic mini shuttle flown in secrecy by the US military. Has completed multiple missions, one lasting 908 days in orbit. Tests reusable spaceplane technology on long flights. Its cargo and activities are classified, which fuels speculation. About a quarter the size of the space shuttle.