Alexander Dmitriyevich Dubyago (Александр Дмитриевич Дубяго in Russian) (December 5(18), 1903, Kazan - October 29, 1959, Kazan) was a Soviet astronomer and expert in theoretical astrophysics. He was the son of Dmitry Ivanovich Dubyago. December 5 is the 339th day (340th in leap years) of the year in the Gregorian calendar. ... 1903 (MCMIII) was a common year starting on Thursday (see link for calendar) of the Gregorian calendar or a common year starting on Friday of the 13-day slower Julian calendar. ... Kazan (Russian: ; Tatar: Qazan, Казан) is the capital city of the Republic of Tatarstan, Russia, and one of Russias largest cities. ... October 29 is the 302nd day of the year (303rd in leap years) in the Gregorian Calendar, with 63 days remaining. ... 1959 (MCMLIX) was a common year starting on Thursday of the Gregorian calendar. ... Soviet redirects here. ... An astronomer or astrophysicist is a person whose area of interest is astronomy or astrophysics. ... Theoretical astrophysics is the discipline that seeks to explain the phenomena observed by astronomers in physical terms with a theoretic approach. ...

A crater on the Moon is named after Alexander Dubyago and his father. Dubyago is a lunar crater that lies in the eastern part of the Moon, so that it appears significantly foreshortened when viewed from the Earth. ... Bulk composition of the Moons mantle and crust estimated, weight percent Oxygen 42. ...