posted on Jul, 13 2003 @ 04:49 PM
Well, Pluto is a planet simply because it orbits the sun on its own... though there are some scientists who think that it should just be reclassified
as a planetoid, as there are many other objects like it at the edge of the solar system (if you consider Pluto a planet, you have to consider Qouar
(sp) and Ixion planets, too, they say).
So far as knocking-off orbits within the solar system... since Pluto's total mass isn't changing, only changing state, its orbit should stay the