Mir

Mir was a space station that operated in low Earth orbit from 1986 to 2001, serving as a microgravity research laboratory for crews conducting experiments in various fields. It was the first modular space station, assembled in orbit from 1986 to 1996, and held the record for the longest continuous human presence in space at 3,644 days. Mir was occupied for a total of twelve and a half years, with a capacity to support a resident crew of three, and was used for a variety of research and technological development purposes.learn more on wikipedia