Viktor AMBARTSUMYAN, USSR Astrophysicist. Professor, Yerevan University, since 1947; full member, Armenian Academy of Sciences, since 1943; full member, USSR Academy of Science, since 1953; President, Armenian Academy of Sciences, and Director, Byurakan Astrophysical Observatory, since 1947; Presidium member, USSR Academy of Science, and member, Committee Lenin Prizes for Science and Technology, USSR Council of Ministers, since 1960.
Specialist in theoretical astrophysics and stellar astronomy. 1941-1943 developed and founded new theory of light scattering in turbid media. 1947 discovered and studied new young star clusters.
Devised a method of computing the mass ejected by nova stars and developed the theory of radial equilibrium of planetary nebulae. 1934-1946 Professor, and Head, Chair of Astrophysics, Leningrad University. 1939-1953 corrcsp. member, USSR Academy of Science.
1943-1947 V.-President, Armenian Academy of Sciences. 1948-1955 V.-President, International Astronomical Union. Member or honorary member of several foreign acad. of science and learned society.
Member, All-Union Society for the Dissemination of Political and Science Knowledge. Deputy, USSR Supreme Soviet of 1950, 1954 and 1958 convocation. Member, Draft Bills Commission, Soviet of the Union, USSR Supreme Soviet of 1958 convocation.