Editing Salyut programme (section)

=== Second generation – long-duration inhabitation of space ===
[[File:Moscow Polytechnical Museum, Salut space station.jpg|thumb|Mockup of Soyuz and Progress spacecraft docked to Salyut 6, Moscow Polytechnical Museum]]
In 1977, another marked step forward was made with the second generation of Salyut stations. The aim was to continuously occupy a space station with long-duration expeditions, for the first time in spaceflight.

Although Salyut 6 and Salyut 7 resembled the previous Salyut stations in overall design, several revolutionary changes were made to the stations and programme for the aim of continuous occupation. The new stations featured a longer design life and a second [[Spacecraft docking|docking port]] at the aft of the stations – crew exchanges and station "handovers" were now made possible by docking two crewed Soyuz spacecraft at the same time. Furthermore, the uncrewed Progress resupply craft was created based on the crewed Soyuz, to resupply the crew and station with air, air regenerators, water, food, clothing, bedding, mail, propellants, pressurant, and other supplies. While the Progress docked to the station's second docking port, the crew's Soyuz spacecraft could remain docked to the station's first port. The Progress spacecraft even delivered hardware for updating onboard experiments and permitting repairs to the station, extending its life.<ref name=Mir>{{cite web |url=http://ston.jsc.nasa.gov/collections/TRS/_techrep/RP1357.pdf|title=Mir Hardware Heritage|last=Portree|first=David|date=March 1995|publisher=NASA|access-date=24 August 2012|url-status=dead|archive-url=https://web.archive.org/web/20090907191412/http://ston.jsc.nasa.gov/collections/TRS/_techrep/RP1357.pdf|archive-date=7 September 2009}} {{PD-notice}}</ref>

==== Salyut 6 (DOS-5) ====
[[File:Salyut 6.jpg|thumb|DOS-5 ([[Salyut 6]]) space station with two docked spacecraft]]
{{excerpt|Salyut 6}}

==== Salyut 7 (DOS-6) ====
[[File:Model of Salyut-7 with two Soyuz spacecrafts.JPEG|thumb|A full-scale model of a [[Salyut 7]] space station and two docked spacecraft. On the left a Soyuz can be seen docked to the fore port, and on the right a Progress is docked at the aft port. The display is in front of one of the pavilions of the [[Exhibition of Soviet National Economic Achievement]].]]
{{excerpt|Salyut 7}}