Sergei Avdeyev (1956-)

Longest Time in Space.

Sergei Avdeyev Soviet Cosmonaut (Russian) who selected in 1987, until august 2005 sergei held the record for the longest time in spent in space (747 days).This was accumulated during three stays aboard Mir: Jul. 27, 1992-Feb. 1, 1993 (188.9 days), Sep. 3, 1995-Feb. 29, 1996 (179.1 days), and Aug. 13, 1998-Feb. 28, 1999 (379.6 days). On these missions, Avdeyev carried out 10 spacewalks lasting a total of 42 hours. On Aug. 16, 2005, he was surpassed by his compatriot Sergei Krikalev as the longest-duration spacefarer.