It looks like only four or five of them are planets (depending on how you define the barren one). The other three appear to be a cell, a star, and a galaxy. Talk about powers of 10. You get powers of 100 (or a lot more) with those three slices.
That swirly planet on the bottom looks really cool. I can actually describe it as whimsical, yet refined. If that isn't variety, nothing is.
...and Hydro, did you realize, that by blacking out the text in the bubble, you very nearly made the Maxis logo?