Space/Science — HabitableZone

Space/Science » in reply to Incidentally...

re: Incidentally...

By extreme, I'm only thinking along these terms for now:

Extreme: 1) Asteroidal or cometary impact.

2) Our sun shedding it's outer shell, in about 4 billions years from now. Before then, we WILL feel it's heat. Someone I admired here said that it would be in the thousands of years (hopefully, hundreds) as our sun's outer shell starts to 'grow'.

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