Sputnik III | NASA Missions and Milestones in Space Flight
20th May 1958: Russia's Sputnik III launched on 15th May 1958. Weighing 1ton 6cwts it is 111ft 8 inches high. Used as a geophysical lab investigating earth's magnetic field it finished orbiting on 6th April 1960. (Photo by Keystone/Getty Images)
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