Originally Posted by eburacum45

Sorry, Soldier; there are no humans anywhere in the visible universe except those born on Earth. If an intelligent beng comes from another world with a separate biosphere they are not human, even if by some incredible chance they resemble humanity.
The chances of any extraterrestrial being closely resembling humans is very low; the chance of aliens as humanoid as those from Star Trek are only slightly higher. To be honest I don't know whether you would count Luke Skywalker and his companions as alien or not; they were, in the story, born in a galaxy long ago and far away. But the chances of such a human-like race anywhere in the Hubble volume outside of Earth is infinitesimal.