So when you start looking at all the stuff out there in that big old space thing, a few things come clear. As time passes and things break apart, they cool. So anything of a certain age or certain size has cooled from a ball of lava to say - a rock. That changes things, because atmospheres disappear and the places become big crater balls. There are moons around Saturn and Jupiter with active volcanos. They're still seismically active, just like Earth.
So this got me wondering, will the Earth eventually cool and harden to rock? When this happens, the giant mass of iron at the center of the planet will stop spinning and the magnetic field that protects us from the worst of the sun will stop. Freaky stuff.
So tonight I did some looking at it seems that in fact, the Sun will go red giant and vapourize the planet way before that happens. The earth would take 10,000,000,000 years to solidify, but the sun will destroy the earth in 7,600,000,000 years. The sun takes it by a hair. If we don't do it first.
Refreshing.
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I've read that there is also a better chance of another giant asteroid hitting Earth and killing all humans before the sun dies.
Yeah as far as wiping out humanity, the sun is the least of our worries.
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