Is it there? Did it disappear? Was it destroyed?
A common question with lots of wrong answers is the status of Pluto. After many years of discussions, scientists around the world decided to create a new category for the new bodies found similar to Pluto. They named them dwarf planets. You see, Pluto's characteristics are very different from the other solar system planets.
1. It is mainly made of ice instead of rock or gas.
2. Its orbit is very different to the other planets. (this is called a different eccentricity by astronomers)
3.It's just too far away.
There are currently 4 other dwarf planets: Ceres, Eris, Haumea, and MakeMake.
Hope this video might help you understand a little bit more.
http://www.youtube.com/watch?v=FqX2YdnwtRc
