What happens when a main-sequence star exhausts its core hydrogen fuel supply?
A. The entire star shrinks in size.
B. The core shrinks while the rest of the star expands.
C. The core immediately begins to fuse its helium into carbon.
D. The star becomes a neutron star.
Answer:B
What happens when a main-sequence star exhausts its core hydrogen fuel supply?
A. The entire star shrinks in size. B. The core shrinks while the rest of the star expands. C. The core immediately begins to fuse its helium into carbon. D. The star becomes a neutron star.