Халықаралық ғарыш станциясының "Звезда" модулі

Russian International Space Station module

Zvezda (Звезда, meaning "star"), Salyut DOS 8, also known as the Zvezda Service Module, is a module of the International Space Station (ISS). It was the third module launched to the station, and provided all of the station's life support systems, some of which are supplemented in the US Orbital Segment (USOS), as well as living quarters for two crew members. It is the structural and functional center of the Russian Orbital Segment (ROS), which is the Russian part of the ISS. Crew assemble here to deal with emergencies on the station. The module was manufactured in the USSR by RKK Energia, with major sub contracting work by GKNPTs Khrunichev. Zvezda was launched on a Proton launch vehicle on 12 July 2000, and docked with the Zarya module on 26 July 2000.

The basic structural frame of Zvezda, known as "DOS 8", was initially built in the mid 1980s to be the core of the Mir 2 space station. This means that Zvezda is similar in layout to the core module (DOS 7) of the Mir space station. It was in fact labeled as Mir 2 for quite some time in the factory. Its design lineage thus extends back to the original Salyut stations. The space frame was completed in February 1985 and major internal equipment was installed by October 1986. The Mir 2 space station was redesigned after the failure of the Polyus orbital weapons platform core module to reach orbit. Zvezda is around 1/4 the size of Polyus, and has no armaments.

The rocket used for launch to the ISS carried advertising; it was emblazoned with the logo of Pizza Hut restaurants, for which they are reported to have paid more than US$1 million. The money helped support Khrunichev State Research and Production Space Center and the Russian advertising agencies that orchestrated the event. Management and integration of the Service Module into the International Space Station began in 1991. Structural construction was performed by RKK Energia, then handed over to the Khrunichev Design Bureau for final outfitting. Joint reviews between the Russian Space Agency (Roscosmos) and the NASA ISS Program Office monitored construction, solved language and security concerns and ensured flight readiness and crew training. Several years of delay were encountered due to funding constraints between Roscosmos and RKK Energia requiring repeated delays in First Element Launch. On 26 July 2000, Zvezda became the third component of the ISS when it docked at the aft port of Zarya. (The U. S. Unity module had already been attached to Zarya). Later in July, the computers aboard Zarya handed over ISS commanding functions to computers on Zvezda. On 11 September 2000, two members of the STS 106 Space Shuttle crew completed final connections between Zvezda and Zarya; during a 6 hour, 14 minute EVA, astronaut Ed Lu and cosmonaut Yuri Malenchenko connected nine cables between Zvezda and Zarya, including four power cables, four video and data cables and a fiber optic telemetry cable. The next day, STS 106 crew members floated into Zvezda for the first time, at 05:20 UTC on 12 September 2000. Zvezda provided early living quarters, a life support system, a communication system (Zvezda introduced a 10 Mbit/s Ethernet network to the ISS ), electrical power distribution, a data processing system, a flight control system, and a propulsion system. These quarters and some, but not all, systems have since been supplemented by additional ISS components.

Due to Russian financial problems, Zvezda was launched with no backup and no insurance. Due to this risk, NASA had constructed an Interim Control Module (ICM) in case it was delayed significantly or destroyed on launch.