How long does core helium burning last in a star compared with core hydrogen burning?

Question

Quizplus · Accepted Answer

Core helium burning lasts about 1/10 of the time spent burning hydrogen. During hydrogen burning, the star is on the main sequence, which lasts for millions of years. Once all the hydrogen in the core is used up, the star contracts and heats up until helium fusion can begin, but this phase lasts only a few hundred million years before the star transitions again.

How Long Does Core Helium Burning Last in a Star