Soviet Space Travel Planets Open To Mankind USSR[ON RESERVE 9 1 26] Original vintage Soviet space race propaganda poster The Way to the Planets is Open to Mankind! ! issued in celebration of the first man in space on 12 April 1961, the pilot and cosmonaut Yuri Gagarin (Yuri Alekseyevich Gagarin; 1934 1968) depicting a man holding out his arms on a Vostok spacecraft in front of a large red flag with the hammer and sickle State Emblem of the Soviet Union on it, white rays radiating from a sun marked