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R-7 ICBM under development to launch it would be finished in time for a 1957 launch. Thus, in December 1956, OKB-1 head Sergei Korolev proposed the development of two simpler satellites: PS, Prosteishy Sputnik, or Primitive Satellite. The two PS satellites would be simple spheres massing 83.4 kg and equipped solely with a radio antenna. The project was approved by the government on 25 January 1957. The choice to launch these two instead of waiting for the more advanced Object

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