Behind the Iron Curtain: Cosmonautics Day Posted on April 12, 2008September 14, 2014 by kcmeesha April 12 is the 47th anniversary of the first successful manned space flight. April 12 is celebrated as the Cosmonautics Day. Just remember who was there first. TIME cover 04-21-1961 "Russia's Yuri Gagarin." Illustration of the cosmonaut by Boris Chaliapin. © Time Inc. And Now For Something Completely SimilarBehind The Iron Curtain: Cosmonautics Day (Multimedia Edition)In "Behind the Iron Curtain"Old Newspapers: Cosmonautics DayIn "Behind the Iron Curtain"Behind The Iron Curtain: Building BridgesIn "Behind the Iron Curtain"