YEREVAN. – Armenia is observing Astronomy Day on Thursday, September 18.

At the Cabinet session held on January 8, 2009, a decision was adopted to declare September 18 Astronomy Day in Armenia.

This event is traditionally accompanied by a variety of thematic events.

But this date was not selected by chance because renowned Armenian scientist Victor Ambartsumian, who is one of the founders of theoretical astrophysics, was born on September 18, 1908 in the Georgian capital city of Tbilisi.

Ambartsumian worked in the field of physics of stars and nebulae, stellar astronomy, dynamics of stellar systems and cosmogony of stars and galaxies, and contributed to Mathematical physics.

Ambartsumian also founded the Byurakan Observatory of Armenia in 1946.