Bohdan Paczy%C5%84ski

Bohdan Paczyski or Bohdan Paczynski was a Polish astronomer notable in the theory of the stellar evolution, accretion discs, and gamma ray bursts.

Paczyski was born onFebruary 1940 in Vilnius, Lithuania, to a lawyer and a teacher of Polish literature. In 1945 his family chose to leave for Poland and settled in Krakw, and then in 1949 in Warsaw. At the age of 18, Paczyski published his first scientific article in Acta Astronomica. Between 1959 and 1962 he studied astronomy at the University of Warsaw. Two years later he received a doctorate under the tutelage of Stefan Piotrowski and Wodzimierz Zonn.

Source: Wikipedia