After a star leaves the main sequence, ______________________.
A) it continues to fuse hydrogen into helium in its core
B) it now fuses hydrogen into helium in a shell outside the core
C) it no longer fuses hydrogen into helium anywhere inside the star
D) all hydrogen in the star has been fused, and helium fusion begins

Question

Quizplus · Accepted Answer

After a star leaves the main sequence, it typically begins to fuse hydrogen into helium in a shell surrounding the core, as the core itself contracts and heats up, eventually leading to helium fusion in the core.

After a Star Leaves the Main Sequence, ______________________