After discovering something named 'Atoms' after Sir Henry Longbriar Atom, which are round in some form or another, scientist John Pallejo comes up with the theory of round planets, assuming; "If all things are made up of tiny, round molecules, then everything is round in some form, and if you do sail across the Earth, you will notice you do not fall off the earth and you will notice not everything is at the same level" basically what he said is if you sail across th world you will notice nothing is flat.
And no Tristan, we are not naming the loving planets after what you hink they could be, because they are cigarettegy names.