I suppose it's nice to speculate...

..about the end of life as we know it. But really, this is at least +5 BILLION FREAKIN' YEARS AWAY! (no link)

Yes, life as we know it will cease to exist, but I think it'll happen long before the sun turns into a red giant, due to the 2nd Coming and the Millenium. Celestial worlds can't be destroyed, can they?