Valery Korzun Status: Retired 3/5/1953 – Nationality: Russian Type: Government Agency: Russian Federal Space Agency (ROSCOSMOS) Valery Grigoryevich Korzun (Russian: Валерий Григорьевич Корзун, born 5 March 1953) is a Russian cosmonaut. He has been in space twice totalling 381 days. He has also conducted four career spacewalks.