What about Eris, formerly known as Planet X, the one they found beyond Pluto...? It's had a few other names before the official dubbing, and unfortunately it was the reason they redefined what makes a "planet" ... which got Pluto demoted to a "planetoid" along with the new Eris and 2 or 3 others in our Solar System. I'm done ranting science now <.///.> just would've liked to see her too.
Follow the order from our Solar System: Sun, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto (although now it's not considered as a planet). Plus the original concept of Planet Hugger.
Pluto is Pluto! Just because it doesn't orbit around the sun the same way as all the other planets doesn't mean it's just tossed out! I'm telling my kids that. I grew up with a planet names Pluto and just because it moves in space different then the other planets a lot of people don't call it a Planet anymore! It gets closer to the sun then Neptune for godsake!