What happens when a star exhausts its core hydrogen supply? what happens when a star exhausts its core hydrogen supply?

What happens when a star exhausts its core hydrogen supply? what happens when a star exhausts its core hydrogen supply? it contracts, becoming hotter and brighter. it contracts, becoming smaller and dimmer. its core contracts, but its outer layers expand and the star becomes bigger and brighter. it expands, becoming bigger but dimmer. its core contracts, but its outer layers expand and the star becomes bigger but cooler and therefore remains at the same brightness?

Asked on September 7, 2017 in No Category.
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