Looks like the old debate has returned and astronomers are once again arguing over Pluto's planet status.
I personally would like to see Pluto remain in its "NOT A PLANET" status. But for a somewhat unorthodox reason. I often use the fact that Pluto is no longer considered a planet as a way to point out one of the important differences between science and religion. It is a great example of new technology... providing new information... that causes the scientific communty to admit fault in it's existing information. No adherence to tradition, no injured pride, no accusations of heresy and no excommunication. You just inform the world that billions of books, posters, documentaries and science fair models are WRONG. And when the world replies "COME ON!" Science replies "TOUGH SH*T" this is science.
And if you are thinking "Hey man Pluto should be a Planet, It always has been, its an accepted fact." Well then you have missed your calling. You should have been a church elder in the 1600s. You could have helped to stifle the work of Galileo Galilei. Tradition has no place in science.
And with that in mind, if you can cut Pluto some slack because of 70 years of planet status then what are you gonna do for the geocentric model of the solar system which held sway for SIX THOUSAND years.
But don't take it from me. Take it from The Chairman of the Board (of The Planetary Society) Neil deGrasse Tyson