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An average star, which is what our sun is, will actively fuse hydrogen into helium for a few billion years (exact time varies based on mass), then it slowly expands int a giant star. Then, the star's outer layer of gases puff off and become a planetary nebula, where its hot core is exposed as a white dwarf. The star reddens and cools, then stops burning and becomes a black dwarf.

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12y ago
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Q: How does sun-like star evolve and die?
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