A space station is a place built for astronauts to live and work in, which is sent into space and then keeps going around the earth.
space station in British English
noun
any large manned artificial satellite designed to orbit the earth during a long period of time thus providing a base for scientific and medical research in space and a construction site, launch pad, and docking arrangements for spacecraft
Also called: space platform, space laboratory
space station in American English
or space platform
a spacecraft designed to remain in orbit for a long period of time and to serve as a station from which to launch other spacecraft, as a research center, etc.