Robert Goddard launches first successful liquid fuel rocket.
Soviet Union launches Sputnik 1
Sputnik 2 carries first living being to space
United States launches Explorer 1
Yuri Gararin is the 1st man launched into space.
Alexei Leonov is the 1st man to walk ins pace
Apollo completes first manned mission for Apollo program.
Neil Armstrong - 1st man to land on and walk on the moon.
Soviets were the first to successfully put a space station in orbit.
American space orbiter Mariner 9 surveys Mars