In 1951, in Collier's Weekly , Wernher von Braun published his design for a rotating wheel space station , which referenced Potočnik's idea – however these concepts would never leave the concept stage during the 20th century. The International Space Station (ISS) is a multi-nation construction project that is the largest single structure humans ever put into space. Its main construction was completed between 1998 and 2011, although the station continually evolves to include new missions and experiments. It has been continuously occupied since Nov. 2, 2000.Wiki info
A space station, also known as an orbital station or an orbital space station, is a spacecraft capable of supporting crewmembers, which is designed to remain in space (most commonly as an artificial satellite in low Earth orbit) for an extended period of time and for other spacecraft to dock. A space station is distinguished from other spacecraft used for human spaceflight by lack of major propulsion or landing systems. Instead, other vehicles transport people and cargo to and from the station. As of 2018[update], one fully functioning space station is in Earth orbit: the International Space Station (operational and permanently inhabited). Various other components of future space stations, such as Japan's space elevator and U. S. inflatable modules, are also being tested in orbit. Previous stations include the Almaz and Salyut series, Skylab, Mir, and Tiangong-1 and Tiangong-2 . China, Russia, the U. S. , as well as a few private companies are all planning other stations for the coming decades.