Over the course of their hydrogen-fusing lives,stars:
A) move along the main sequence, from left to right.
B) remain in nearly the same location on the main sequence.
C) move along the main sequence, from right to left.
D) move up the red giant branch.

Question

Quizplus · Accepted Answer

Stars remain in nearly the same location on the main sequence while they are fusing hydrogen in their core. This is because the rate of energy production in the core is balanced by the rate of energy transport to the surface. As stars exhaust their hydrogen fuel, they will eventually move off the main sequence and evolve into giants or supergiants.

Over the Course of Their Hydrogen-Fusing Lives,stars