29/09/1977 Soviet space station Salyut 6 is launched
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OTD in Space - Sept. 29: Salyut 6 Space Station Launch
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.