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What is the evolution of the sun?

Updated: 9/16/2023
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14y ago

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The Sun is gradually getting warmer.

In about one billion years, it will have increased in temperature so much that water on Earth will slowly boil away, leaving Earth as a hot dry planet devoid of all life as we know it.

In about 5 billion years, all the hydrogen will have been used up and the Sun will expand as a red giant, it's outer envelope almost touching Earth.

Mercury and Venus will have been obliterated and the Earth with be nothing more than a molten crust.

In another billion years, all available fuel will have been used up and the Sun will shed it's outer layers as a planetary nebula.

All that will be left of our Sun will be it's hot dense core or white dwarf.

Over billion and billions of years, the white dwarf will radiate it's heat back in to space, until no more heat is left. It will then become a black dwarf.

See related link for a pictorial.

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Q: What is the evolution of the sun?
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