Zvezda Service Module
Zvezda served as the early cornerstone for the first human habitation of the station, providing the early station living quarters, life support system, electrical power distribution, data processing system, flight control system and propulsion system. It also provided a communications system that includes remote command capabilities from ground flight controllers.
Although many of these systems have now been supplemented or replaced by U.S. station components, the Service Module will always remain the structural and functional center of the Russian segment of the International Space Station.
Related category MANNED SPACEFLIGHT
Text copied from the NASA Zvezda Service Module web page.
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