I question I have always pondered and have asked professors at both BYU and BYU-Idaho. Hoping some of our LDS friends can clarify. And I’ll be using references and terminology unique to the LDS church.
We know that under the direction of Heavenly Father, Jesus Christ and Michael organized this earth. Other worlds? We do not know if they took part in it’s creation. Now, when Christ came down and sacrificed His life, He completed the Atonement. Does Christ’s Atonement cover the entire Universe? Since we believe in a progression of gods, would there have to be other Christ’s in other Universes who performed the same thing for their Universe and god? Same plan of salvations?
Also, everyone i’ve talked to about this tells me “this is deep doctrine that really doesn’t pertain to us since it’s outside our knowledge”. I always have a problem with that because why would Heavenly Father tell us about progression of gods and then not let us explore that knowledge? If He didn’t want us to know about other worlds and what goes on over there, why do we know about them in the first place?