Sergey Blazhko

Sergey Nikolayevich Blazhko (; November 17, 1870, Khotsimsk – February 11, 1956, Moscow) was a Russian and Soviet astronomer, a corresponding member of the Academy of Sciences of the Soviet Union (1929). He was a graduate of Moscow State University and held a number of positions there including head of the Moscow Observatory from 1920-1931. He discovered a secondary variation of the amplitude and period of some RR Lyrae stars and related pulsating variables, now known as the Blazhko effect.

Awards and honours

• Laureate of the Stalin Prize, 2nd degree (1951)
• Orders of Lenin (1944, 1953)
• Orders of the Red Banner of Labour (1940, 1945)
• Medal "For Valiant Labour in the Great Patriotic War 1941–1945" (1946)

Crater on the Moon and asteroid are named after Blazhko.

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