29/09/1977 Soviet space station Salyut 6 is launched
Salyut 6 pt 1 - 2 (english)
Salyut 6 pt 2 - 2 (english)
It was the first of second-generation space stations. It possessed several design advances. These included a second docking port, a new main propulsion system and the multispectral telescope. The addition of the second docking port made crew handovers and station resupply by unmanned Progress freighters.