The 2 Skinnee J's tried to tell us this all before, but some didn't listen. (Check out the song from them off the album Supermercado, Pluto is a Planet, it really is a Pro-Pluto Political Rocker) Well, Pluto is a planet, along with Ceres, Charon and 2003 UB313, or better known as Xena. IAU has proposed a definition for a planet to be any object orbiting a star that has been pulled by its own gravity into a ball shape and is not a satellite of another planet.
Ceres was a planet in 1801, but got demoted to asteroid over a century ago. It rejoins the planet race after this long segregation. When asked about the reinstatement, Ceres quipped, "For over 100 years I have been ridiculed, laughed at, pointed at- ooohhh, look at him, used to be a planet, but now just an asteroid, hahahahhaHAHAHAHA, (pointing and snickering)". Clearly a delicate topic for Ceres, he went on to speak about his committment to the planet community and hopes that other planets out there get their recognition as well.
Charon is sort of been Pluto's moon, but the problem was that they orbit eachother, so they now both gain Planet status. Pluto has spoke vehemently before about the Earth's opposition to Same-planet unions, stating that, "The only reason Earth doesn't want to give my Charon planet status is for tax and insurance reasons, and now they want to demote me from being a planet because I am that kind of planet. Well, I am planet, so is Charon, and hear us roar!" Now, with the new IAU definition, both will be planets, and be our solar systems first 'double planet'. It is still unclear of the tax and insurance benefits that may follow.
Finally, 2003 UB313, or Xena will also gain planet status. It is the farthest known planet-elect in the solar system, and was unable to be reached for comment on Tuesday. Currently thought to be starring in an upcoming roll with Kevin Sorbo for a Hercules/Xena epic movie, she has been very busy.