SPUTNIK / SCIENCE PHOTO LIBRARY SPUTNIK / SCIENCE PHOTO LIBRARY
Roald Sagdeev (1932- ), Russian physicist. Sagdeev was head of the Soviet Space Research Institute in Moscow for 15 years, from 1973 until 1988. During that time he presided over a number of important missions, including the joint US-Soviet Apollo- Soyuz, the Venera series to Venus and the international missions to inspect the tail of Halley's Comet. He carried out important research into the behaviour of hot plasma and controlled nuclear fusion.
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