Agop Terzan (born Terziyan) (October 31, 1927 – April 4, 2020) was a Turkish-French astronomer of Armenian descent.
Born in Istanbul, he finished his high school from Getronagan Armenian High School, after he received his bachelor's degree in mathematical and astronomical science in 1945 and master's degree in astronomy in 1949 from Istanbul University, where he worked as a teacher of mathematics at the Central Lyceum of Istanbul.
In 1965, he was awarded a doctorate of mathematical sciences by the University of Lyon, where he studied under Jean Dufay.
[1] Terzan also discovered 158 diffuse nebulae, 124 galaxies, and 1428 high proper motion stars.
[1] He was a member of the French National Astronomy Committee and the International Astronomical Union (IAU).