Soviet Space Program was scheduled to launch a Soyuz rocket as part of the
Soyuz 11 mission. The launch window for the Human Exploration mission was
on Sun, Jun 6th, 1971, 3:55 AM EDT from 1/5, Baikonur Cosmodrome, Kazakhstan. The status of the launch was Success.
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Soyuz 11 launched on 6 June 1971, 07:55:09 UTC. It carried commander Georgy Dobrovolsky, flight engineer Vladislav Volkov and test engineer Viktor Patsayev to orit. Crew arrived to Salyut-1 space station on 7 June 1971 and remained there until their departure on 30 June. It was the only mission to board the space station.
Soyuz 11 returned to Earth on 30 June 1971, 02:16:52 UTC, with mission ending in disaster. During atmospheric re-entry crew capsule depressurised, killing all three crew members.
The Roscosmos State Corporation for Space Activities, commonly known as Roscosmos, is the governmental body responsible for the space science program of the Russian Federation and general aerospace research. Soyuz has many launch locations the Russian sites are Baikonur, Plesetsk and Vostochny however Ariane also purchases the vehicle and launches it from French Guiana.
Georgiy Timofeyevich Dobrovolsky (Russian: Гео́ргий Тимофе́евич Доброво́льский; June 1, 1928 – June 30, 1971) was a Soviet cosmonaut who served on the three-man crew of the Soyuz 11 spacecraft. They became the world's first space station crew aboard Salyut 1, but died in space due to asphyxiation due to an accidentally opened valve. They were the first and, as of 2018, the only humans to have died in space.
Vladislav Nikolayevich Volkov (Russian: Владисла́в Никола́евич Во́лков; November 23, 1935 – June 30, 1971) was a Soviet cosmonaut who flew on the Soyuz 7 and Soyuz 11 missions. The second mission terminated fatally.
Volkov, on his second space mission in 1971, was assigned to Soyuz 11. The three cosmonauts on this flight spent 23 days on Salyut 1, the world's first space station. After three relatively placid weeks in orbit, however, Soyuz 11 became the second Soviet space flight to terminate fatally, after Soyuz 1.
After a normal re-entry, the Soyuz 11 capsule was opened and the corpses of the three crew members were found inside. It was discovered that a valve had opened just prior to leaving orbit that had allowed the capsule's atmosphere to vent away into space, causing Volkov and his two flight companions to suffer fatal hypoxia as their cabin descended toward the earth's atmosphere.
Viktor Ivanovich Patsayev (Russian: Ви́ктор Ива́нович Паца́ев; 19 June 1933 – 30 June 1971) was a Soviet cosmonaut who flew on the Soyuz 11 mission and was part of the second crew to die during a space flight. On board the space station Salyut 1 he operated the Orion 1 Space Observatory (see Orion 1 and Orion 2 Space Observatories), he became the first man to operate a telescope outside the Earth's atmosphere.
After a normal re-entry, the capsule was opened and the crew was found dead. It was discovered that a valve had opened just prior to leaving orbit that had allowed the capsule's atmosphere to vent away into space, suffocating the crew. One of Patsayev's hands was found to be bruised, and he may have been trying to shut the valve manually at the time he lost consciousness.