Planet comes from the root word PLANE as in a level plane. Accordingly, plane trigonometry was used for hundreds of years for oceanic navigation. Navigation using spherical trigonometry proved disastrous for navigators and had to be abandoned. Consequently, Antarctica was mapped out and discovered to be a circumference. Interestingly, no animals or plant life live there and nature (or the creator) intended it to be uninhabitable. Stop relying on television and Hollywood for your education. Dafreak is a good handle for you because your brain has been turned to mush.