On the Hertzsprung-Russell diagram, in which direction does the position occupied by a star move after hydrogen burning ends in the star's core?
A)toward the upper left
B)toward the lower left
C)toward the lower right
D)toward the upper right

Question

Quizplus · Accepted Answer

After hydrogen burning ends in a star's core, it moves toward the upper right on the Hertzsprung-Russell diagram, indicating it becomes cooler and more luminous as it expands into a red giant.

On the Hertzsprung-Russell Diagram, in Which Direction Does the Position