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Current estimates are that the sun will run out of fuel in roughly 4.5 billion years. The sun is about half way through its solar life. When that happens, according to our current understanding, the sun will explode and engulf Mercury and Venus. Earth will be close enough to be turned into a cinder; our water and atmosphere will be burned and blown away into space; no life will survive. The sun will collapse into a black dwarf (not a black hole; our sun is not big enough to produce a black hole). That will be that. Long before then, we will have left earth to people other planets, assuming that we survive long enough to learn how.

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17y ago

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