Agop Terzan is a French

French people

The French are a nation that share a common French culture and speak the French language as a mother tongue. Historically, the French population are descended from peoples of Celtic, Latin and Germanic origin, and are today a mixture of several ethnic groups...

–Armenian astronomer. Born in Istanbul

Istanbul

Istanbul , historically known as Byzantium and Constantinople , is the largest city of Turkey. Istanbul metropolitan province had 13.26 million people living in it as of December, 2010, which is 18% of Turkey's population and the 3rd largest metropolitan area in Europe after London and...

, he received his BA in Mathematical and Astronomical Science in 1945. He received a Master's degree in Astronomy in 1949, and a PhD from Lyon University in 1965.

He discovered 710 variable stars during the 1960s and 11 globular clusters, including Terzan 5

Terzan 5

Terzan 5 is a heavily obscured globular cluster belonging to the bulge of the Milky Way galaxy. It was one of six globulars discovered by French astronomer Agop Terzan in 1968 and was initially labeled Terzan 11. The cluster was cataloged by the Two-Micron Sky Survey as IRC–20385...

 and Terzan 7

Terzan 7

Terzan 7 is a sparse and young globular cluster that is believed to have originated in the Sagittarius Dwarf Elliptical Galaxy and is physically associated with it. It is relatively metal rich with Fe/H] = -0.6 and an estimated age of 7.5 Gyr...

 (both discovered in 1968). Subsequently he discovered 4430 new variable stars. Terzan has also discovered 158 diffuse nebulae, 124 galaxies, and 1428 high proper motion stars.

He is a member of the French National Astronomy Committee and the International Astronomical Union

International Astronomical Union

The International Astronomical Union IAU is a collection of professional astronomers, at the Ph.D. level and beyond, active in professional research and education in astronomy...

(IAU).