Died: 1996 AD
1908 – Born on September 18th in Georgia and educated at the University of Leningrad, now St. Petersburg State University.
1947-1993 – He was president of Armenian Academy of Sciences.
– He worked at the Pulkovo Observatory, the Byurakan Astrophysical Observatory (BAO), which he founded and directed, Erevan University.
– He was the president of International Astronomical Union.