In August of 2006 Pluto was demoted and no longer considered a planet thanks to the IAU.
Now here's a a few things from an old news article that warrant some attention: Pluto Demoted: No Longer a Planet in Highly Controversial Definition
How convenient! When there were so few astronomers available, Pluto's planetary status was put to vote. At that...less than 5% of the world's astronomers had the chance to vote. I call, FOUL!