Longest Time in Space

The astronaut who has spent the longest continuous time in space is Valeri Vladimirovich Polyakov who was aboard the Mir space station for 437 days 18 hours from 9 Jan 1994 to 22 March 1995.

Cosmonaut_Polyakov_Watches_Discovery's_Rendezvous_With_Mir_crop
Valeri Vladimirovich Polyakov

 

Gennady Ivanovich Padalka holds the record for the most time spent in space overall at 879 days over 5 missions.

Padalka_on_station
Gennady Ivanovich Padalka

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