15 May] 1917 – 8 March 2010) was a Soviet and Russian astrophysicist known for his works in cosmic ray physics and neutrino astrophysics.
He entered aspirantura of the faculty in 1944 and six years later defended dissertation "Density spectrum of Extensive Air Showers" for Candidate of Sciences degree.
He defended dissertation "Nuclear-cascade process and EAS" for Doctor of Sciences degree in 1954 and became professor in 1958.
In 1982 Zatsepin was awarded Lenin Prize for creating Station of Cosmic Rays of the Yakut Scientific-Research Base of the Academy of Sciences of the Soviet Union.
For creating the Baksan Neutrino Observatory, and conducting experiments there he was awarded the State Prize of the Russian Federation in 1998.