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breckenridgeback t1_jaeuzyk wrote

It won't, directly.

Earth, however, will likely be uninhabitable long before then (barring human actions). The Sun is growing hotter as it ages, and Earth has about another billion years left before the Sun's warming trend begins to evaporate our oceans and trigger a Venus-esque runaway greenhouse effect.

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BaffleBlend t1_jaex1le wrote

On the plus side, assuming (admittedly rather boldly) that there's any life left in the universe by then, Mars will be in the temperature range that Earth once was.

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breckenridgeback t1_jaexs5x wrote

...but it still won't have a magnetic field, so it won't be able to hold on to a thick atmosphere regardless.

Mars already isn't that cold. On a warm day near Mars' equator, you could walk around in a sweater quite comfortably provided you had pressurized oxygen to breathe.

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