宇航员 (yǔhángyuán): This term refers to an astronaut who travels and works in space.
太空站 (tàikōngzhàn): This term translates to 'space station' and represents a large spacecraft where astronauts live and work for extended periods.
卫星 (wèixīng): This term means satellite, which is an object that orbits around a planet or celestial body.