Multiple Choice
Consider two stars of the same mass: star 1 has just moved on to the main sequence,and star 2 is about to leave it.How are these two stars different?
A) Star 2 has more helium in its core and a hotter surface.
B) Star 2 has more helium in its core and a cooler surface.
C) Star 1 is more luminous and has a hotter surface.
D) Star 1 is more luminous and has a cooler surface.
Correct Answer:

Verified
Correct Answer:
Verified
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