SPUTNIK 1. By, S.Subhashini M.Tech (COS) 1 st year. INTRODUCTION. Sputnik 1 was the first artificial Earth satellite. It was a 58 cm diameter polished metal sphere, with four external radio antennas to broadcast radio pulses.
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The power supply, with a mass of 51 kg was in the shape of an octagonal nut with the radio transmitter in its hole.