Indeed. we could be wiped out in one mass extinction event but the earth and other planets will just carry on orbiting for eternity.. or until the sun expands enough to consume the planets.. or implodes into a black hole that sucks everyone in.
By the way I learnt from a 5 year old boy today that Venus is a mini version of the sun, capable of holding its own solar system. haha. These kids are so smart now.. maybe there's hope for the future