a.Its core contracts, but its outer layers expand and the star becomes bigger but cooler and therefore remains at the same brightness.
b.Its core contracts, but its outer layers expand and the star becomes bigger and brighter.
c.It contracts, becoming smaller and dimmer.
d.It contracts, becoming hotter and brighter.
e.It expands, becoming bigger but dimmer.What happens when a star like the sun exhausts its core hydrogen supply?uh... f?
f. If the sun uses up its core hydrogen supply we are all screwed.What happens when a star like the sun exhausts its core hydrogen supply?http://en.wikipedia.org/wiki/Sun#Life_cy鈥?/a>
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Its core contracts, but its outer layers expand and the star becomes bigger and brighter.
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