Salyut 7 (Russian: Салют-7; English: Salute 7) (aka DOS-6) was a space station in low Earth orbit from April 1982 to February 1991. It was first manned in May 1982 with two crew via Soyuz T-5, and last visited in June 1986, by Soyuz T-15. Various crew and modules were used over its lifetime, including a total of 12 manned and 15 unmanned launches. Supporting spacecraft included the Soyuz T, Progress, and TKS spacecraft.
It was part of the Soviet Salyut programme, and launched on 19 April 1982 on a Proton rocket from Site 200/40 at the Baikonur Cosmodrome in what was then the Soviet Union. Salyut 7 was part of the transition from "monolithic" to "modular" space stations, acting as a testbed for docking of additional modules and expanded station operations. It was also the tenth space station of any kind launched.
Read more about Salyut 7: Description, Crews and Missions, Technical Problems, Expeditions, Specifications, Visiting Spacecraft and Crews