Spore is fun for a much more casual experience once you get to space stage. Get to the center of the galaxy and either befriend or become enemies with The Grox. Kerbal Space Program is my favorite, but more challenging.

All live on earth dies if the sun went supernova. The Sun isn’t massive enough to go supernova. It’ll turn into a Red Giant star and incinerate Mercury and Venus for sure. All life on Earth will die anyway when that eventually happens. Basically, that’s the end of humanity unless we can colonize other places like solar systems, before then.