This is Part I of hopefully a lengthy series, posted as I graduate to new levels or sections, of a top-down method of creating a game world, starting at the "top" - the celestial body itself. I'll be using Earth and our solar system as my base examples, so let me put its stats up first.
| PLANET | DIA (MI) | SqMi | Land% | Land SqMi | NumCont |
| Earth | 7,930 | 197,000,000 | 30% | 57,000,000 | 7 |
