A space station is a artificial satellite in space that people can live at. All past and current space stations have been in low Earth orbit. Space stations can dock with other spacecraft. This allows transferring cargo and people. At present the International Space Station is the only space station in orbit. The first space station was Salyut 1. Prior stations were the seven Salyut stations, Skylab, Mir and the two Tiangong stations.[1] The Chinese Space Station is planned for the future.[2]
Space stations are used to learn about how being in space for a long time affects the human body. They also are a place for science experiments and research.[3] Space stations have been designed for more than one crew. Each crew member may stay aboard the station for weeks or months, and then is replaced by others. Some have spent more than one year at a time on a space station. This includes Vladimir Titov, Musa Manarov, Sergei Avdeyev and Valeriy Polyakov aboard Mir.[4]