text: when earth no longer exists, will another world take our place? when the world that replaces ours has serious problems, will jesus come to that world to save it like he did for us back in bibical times spreading he good news? this planet will probably last until the sun runs out of hydrogen and expands (automatically, not in a quest for fuel) to engulf it in about 10,000,000,000 years.  if we take mainstream christian theology literally, it seems likely that the christian god is also that of every other sentient species in the universe like humans. there are probably billions of them, or more.   one can guess that, therefore, avatars are sent to each of those species, giving them a chance to be "saved".  but remember that what you are taught that god and jesus want has been interpreted by a lot of corrupt religious leaders, and politically motivated translators. it may not even have gone down exactly that way here, much less on other planets.