17. How long can an astronaut or cosmonaut stay in space? (A K2S Question)
From The Space Library
So far the single trip record is held by cosmonaut Valeri Polyakov who has stayed in space for 438 days in a row. http://www.worldspaceflight.com/bios/stats.htm (See CDROM)
Answer provided by Col. USAF (Ret.) Rick Searfoss
Question and Answer extracted from the book Kids to Space - by Lonnie Schorer
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