As I recall, scripture states that the entire CREATION has been groaning ever since the fall of man and all is anxiouslly waiting, groaning until the sons of God are revealed at the last. I reckon it’s all part of the total creation.
Neat to think that all these worlds we are discovering are home to men still under direct guidance from God. Perhaps they have advanced so far that they do travel from place to place...with the exception of Earth. Maybe the Earth is forbidden to them because of the fall.