Chances are that such communication will never take place because of the vast distances separating us from exosolar planets (planets outside our solar system). Until we discover Star Trek Warp Core technology that enables us to propel humans at speeds exceeding the speed of light (something that is theoretically impossible according to Relativity), back and forth visitations are improbable. And until we develop a faster than light form of communication, active 2-way interstellar communication is also improbable. Other worlds are just too far away.
The Lord positioned his populated worlds far apart for a wise purpose. Can you imagine how disruptive it would be to the Lord’s plan if we contacted other telestial, mortal worlds like ours? They might tell us that their prophets are saying that the Son of God was crucified on another world. We might reply, “Yes. That happened here 2000 years ago!”
Or what might happen if we contacted a post-judgment telestialized or terrestialized world? They might say something like: “You guys better keep the commandments or you will end up where we are.” I am not even going to speculate on contacting a celestialized world because I don’t think it is possible. Imagine if we tried to reach a celestialized planet by space travel. Our spaceships would burn up on approach because it could not withstand the glory of a celestialized world. And if we tried to communicate with them they would know it beforehand and jam our incoming transmissions.
Ok, I am having fun with this, but the point is that the Lord doesn’t want us to know much about His other worlds right now. When the Lord showed Moses this earth, Moses asked the Lord to tell him things “concerning this earth, and the inhabitants thereof.” The Lord agreed. Then the Lord showed Moses other worlds which He had created. Moses got a little greedy and asked the Lord to tell him things concerning other worlds in “the heavens, and then thy servant will be content.” The Lord replied with a gentle rebuke: “Moses, my son, I will [only] speak unto thee concerning this earth upon which thou standest.” In His infinite wisdom the Lord withheld information about other worlds.
Our knowledge about other worlds will likely be limited while in mortality. I am fine with that. When the Lord returns He will reveal mysteries in the heavens and earth. I can wait. Until then we will have to rely on our limited scientific knowledge and imagination.