Mormon critic like to say that we believe that we will become gods and have our own planet. I'm not sure where they got that part where we will have our planet because we, in fact, do not believe it nor is it taught as one of our beliefs. On the other hand we do believe in becoming gods, so did the ancient Christians also believe this. It's taught in the Bible, the Church Fathers teach this doctrine and I can see how one could deduct that ones would have their own plant although that is not ever stated explicitly in their writings nor in Mormon writings.
Jesus taught that “he that believeth on me, the works that I do shall he do also; and greater works than these shall he do”(John 14.12).
What is meant by, "...and greater works than these shall he do."