Jesus said there were "other sheep, not of this fold" and "many resting places [in His Father's resting place] and again Psalms talks about a people "that were a new people [that is, that had not known Earth, in Heaven]"
Do these scriptures point to alien technology being able to discover foreign worlds (including ours)? That depends on the world; I think for us, the situation we find ourselves in is prohibitive to alien worlds, simply because they are so far away.
I have a theory (and it is just a theory) that alien worlds might be able to communicate at the quantum level; but I don't know if that extends to manifesting UFOs in alien airspace (our airspace).