New body located in the Solar System

I heard they were debating if it was large enough to call a moon. Apparently there is an academic effort going on to have Pluto's planet classification removed.

It would be sad if they remove the "planet" designation from Pluto based on our historical view of the solar system. However, there seem to be quite a few objects as large or larger that distantly orbit the Sun. Sedna in 2003 immediately comes to mind, but I know there have been others in the last few years. Should these be classified as planets as well?

That's the problem. They are looking at other bodies and saying they are Pluto sized or larger, but we don't want to call them a planet. Charon is almost the size of Pluto.

How old is the debate over whether there is a tenth planet - or an eleventh or a twelve, for that matter? While astronomers debate the size of our solar system, school children are learning some interesting things. A few months ago, a friend's son returned from kindergarten to report that his teacher told him there are ten planets in our solar system. The tenth planet has apparently "been around for awhile", but just doesn't have a name yet.

The tenth planet has a name, it's Sedna. If you are talking about the much fabled Planet-X, that's a different body. No one has observed it yet, but they don't think Sedna is it. Once observed it will be named either Nibiru or Vulcan.