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When does a main seuence become a red giant?

Updated: 8/21/2019
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9y ago

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That's basically when it runs out of hydrogen. How long this takes depends a lot on the mass of the star - in a a very high-mass star ths can take just a few million years, in our Sun it takes about 10 billion years, and in red dwarves, it can take trillions of years for this to happen.

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9y ago
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Q: When does a main seuence become a red giant?
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