Why is Pluto...?

Question

Why is Pluto not a planet anymore even ya know it orbits. Will the tenth planet be that way too? i just heard there was a tenth planet. No one tells me these things.

Answer 1

There are many object orbiting the sun that are not classified as planets. All the asteroids, comets, and Kuiper belt objects are part of our solar system and orbit the sun, but are not planets. It turns out that Pluto is more similar to Kuiper belt objects than it is the classical planets so has been reclassified. That's all.

Answer 2

It just doesn't follow the classification of a planet. Comets and many other things orbit too but they aren't planets.
I used to listen to an astronomist talk at the observatory in Lake Arrowhead. 5 years ago she told me that Pluto wasn't really a planet. She said they were afraid to come out with it because the guy who discovered it was still alive and they didn't want to break his heart. Why would they be concerned about that? Lol!
Anyway, you'll probably hear that Jupiter isn't a planet either because it emits light. Planets do not.

Answer 3

What tenth Planet? I think you are refering to that asteroid or whatever it was. See if they had gone with another definition that would have been a planet. Personally I think Pluto should have been left a planet. Heck it even has a moon.

Answer 4

there is an article on the yahoo.ca homepage right now
basicly its too small and too iregular an orbit
the "tenth planet" was unoficialy called zena, and there were 2 more in the wings before the definition change
orbiting the sun is not enough for planet status, millions of asteroids and thousands of comets orbit the sun in aregular pattern.

Answer 5

It's orbit crosses the path of Neptune's, and it is too small, so it is now classified as a Dwarf Planet.