The first space station in the world was built by the former Soviet Union. Salute series space station was built by the former Soviet Union, among which Salute 1 was the first space station for human beings. This series of space stations * * * launched Salute 1 to Salute 7 ***7 space station. Their task is to complete a wide range of scientific research plans such as astrophysics, space medicine and space biology. Investigate the natural resources of the earth and conduct technical experiments under long-term weightlessness.

Salute 1 consists of docking module, track module and service module. The docking module is designed for docking with spacecraft, and it is the only way for astronauts to enter and leave the space station. The orbital module is similar to the guest room of a space "hotel". It consists of two cylinders with diameters of 3 meters and 4 meters respectively. The cabin maintains the same climate as the earth, and is the place where astronauts work, rest, eat and sleep. The service cabin is equipped with engine and fuel. Salute space station weighs 18 tons and is about 14 meters long. It generally runs in an altitude orbit 200 ~ 250 kilometers from the earth's ground.