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The sun is a star, so sooner or later it would die out. What would happen is the centre of the sun will get smaller and hotter. Outer layers will be pushed out further by this increased heat, so it'll grow in size. Becoming a Giant Red Star, it will grow to about a hundred times its size and will swallow up Mercury! Then, the sun would shrink to about no bigger than our Earth, changing its color from red to white and becoming a White Dwarf. After all that trouble, it would lose all its energy and heat to become a cold dark body, called a Black Dwarf, giving off no light or heat.

But don't worry, this wouldn't happen 'till thousands of millions of years later. So relax, it wouldn't affect you.

Nothing will really happen to the earth per say because the sun will never be able to become something like a black hole, but if it does blow up it will more than likely kill all the inhabitants of earth and of other planets that may (or may not) produce life in the next couple of billion years.

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14y ago

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