ANSWERS: 2
  • In a few billion years? IE by the time we've hopefully left Earth anyway
  • Eventually the sun's corona will envelope Earth (approx 4.5 billion years in the future, if I recall correctly) as the sun expands (having expended it's nuclear fuel). Life (as we know it) will have gone extinct some thousands of years prior to that due to the heat and radiation generated by that expansion.

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