Soyuz 20

Soyuz 20 was an uncrewed spacecraft launched by the Soviet Union. It was a long-duration test of the Soyuz spacecraft that docked with the Salyut 4 space station. Soyuz 20 performed comprehensive checking of improved on-board systems of the spacecraft under various flight conditions. It also carried a biological payload. Living organisms were exposed to three months in space. The primary goal of the mission was to test hardware modifications to the Soyuz 7K-T spacecraft that would extend its operating life from two to three months in preparation for long-duration Salyut crew residencies.

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1975  Wikidata
uncrewed spaceflight, Soyuz 7K-T, low Earth orbit, Soyuz-U, 

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Location: KML, Cluster Map, Maps,

1975-11-17T00:00:00Z

1975-11-17T00:00:00Z

1975 Soyuz 20

1975-11-17T00:00:00Z

1975-11-17T00:00:00Z

rocket launch

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Frameless

Type	Subtype	Date	Description	Notes	Source