An Etymological Dictionary of Astronomy and Astrophysics

The internal structure and all observable characteristics of a star
(such as luminosity and temperature) are determined uniquely by its mass, chemical composition, and age. Same as → Russell-Vogt theorem.

See also: Named after the German astronomer Heinrich Vogt (1890-1968) and the American astronomer Henry Norris Russell (1877-1957); → theorem.