SALYUT-1 World first space station

Salyut 1 (DOS-1) (Russian: Салют-1; English: Salute 1) was launched on 19 April 1971. It was the first space station to orbit the Earth.
Its first crew launched in Soyuz 10 but were unable to board due to a failure in the docking mechanism; its second crew launched in Soyuz 11 and remained on board for 23 productive days. The world's first successful manned space station mission was however overshadowed when the crew was killed before the re-entry of Soyuz 11 on 30 June 1971 – a pressure equalisation valve in the descent module of the Soyuz had opened prematurely when the three modules of the spacecraft separated, suffocating all three.

Salyut 1, the first space station in the history of space flight, is seen here with the docked Soyuz 10 spacecraft.

Salyut 1 was moved to a higher orbit between July and August 1971 to ensure that it would not be destroyed prematurely through orbital decay. In the meantime, Soyuz capsules were being substantially re-designed to allow pressure suits to be worn during launch, docking maneuvers, and re-entry.^[5] However, Salyut 1 ran out of supplies before the Soyuz redesign effort was concluded, and it was decided to fire the engines for the last time on 11 October, to lower its orbit and ensure prompt destructive re-entry over the Pacific Ocean. After 175 days in space, the first real space station came to an end.

Expedition	Crew	Launch (GMT)	Flight up	Landing (GMT)	Flight down	Duration (days)	Remarks
—	Vladimir Shatalov Aleksei Yeliseyev Nikolai Rukavishnikov	23 April 1971 23:54	Soyuz 10	25 April 1971 23:40	Soyuz 10	2.01	Failed to dock
—	Georgi Dobrovolski Vladislav Volkov Viktor Patsayev	6 June 1971 07:55	Soyuz 11	30 June 1971 02:16	Soyuz 11	23.76	Crew killed during reentry