Planetary Radio: Space Exploration, Astronomy and Science

Former Soviet Space Program Director Roald Sagdeev on the Sputnik 1 Anniversary

Planetary Radio: Space Exploration, Astronomy and Science

Former Soviet Space Program Director Roald Sagdeev on the Sputnik 1 AnniversaryLearn more about your ad choices. Visit megaphone.fm/adchoices See omnystudio.com/listener for privacy information. See omnystudio.com/listener for privacy information.

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