When a star has stopped contracting and settled down, where is it in the H-R diagram?
A) on the main sequence
B) below the main sequence in the lower left
C) in the upper right as a red giant
D) It is not on the H-R diagram at that time
E) in the instability strip

Question

Quizplus · Accepted Answer

When a star has stopped contracting and has reached a stable state of nuclear fusion in its core, it is on the main sequence of the H-R diagram.

When a Star Has Stopped Contracting and Settled Down, Where