A star's position in the H-R diagram is determined by its
A) temperature and size.
B) temperature and distance.
C) brightness and size.
D) mass and distance.
E) brightness and distance.

Question

Quizplus · Accepted Answer

The H-R diagram is a plot of a star's temperature against its luminosity. A star's temperature is determined by its mass, and its luminosity is determined by its size. Therefore, a star's position in the H-R diagram is determined by its temperature and size.

A Star's Position in the H-R Diagram Is Determined by Its