It was determined as recently as 2010 that Pluto does not qualify as a true planet due to its gaseous mass formation, illegitimate shape, and irregular orbit. We are back to eight planets until final confirmation of Planet X as the true ninth planet.
Pluto's orbit is longer and slower than other planets.
Pluto is different from the inner planets in that it has not cleared it's orbit from asteroids.
None of the eight planets has an orbit that crossesanother. Dwarf planets (which include Pluto) and Dwarf Planet candidates do cross orbits of planets and each
Pluto does not have an orbit clear of asteroids and debris. Planets do.
Pluto's orbit passes inside the orbit of Neptune.
Pluto is farther from the Sun than the eight planets. It takes 248 years to complete one orbit. This means that one year on Pluto equals 248 Earth years.
Pluto is a dwarf planet. It is smaller than the other planets. It also has a very irregular orbit.
Pluto's orbit is quite unusual. It takes 248 Earth years for Pluto to complete one orbit around the Sun. Its orbit is also more oval-shaped, or elliptical, than those of the 8 major planets. That means that sometimes Pluto is a lot nearer to the Sun than at other times, At times Pluto's orbit brings it closer to the Sun than Neptune.
Pluto is smaller than any of the eight planets. Also, it hasn't "cleared its surroundings" - I guess that basically this means that it is not the dominant object in the surroundings of its orbit.
The least eccentric orbit is Venus The most eccentric orbit is Pluto (aside from Pluto, Mercury)
Pluto is located in what is know to be the Kuiper belt on the outside of our solar system. recently, scientists have discovered tens of thousands of other "planets" in this area, and many of them are as large or larger than Pluto Pluto has characteristics of a planet, like a moon, and an orbit, but because of its size and elliptical orbit, it is not a planet. It is actually the first member of a new category called dwarf planets. the newest dwarf planet is Eris which is slightly larger than Pluto.
Pluto doesn't orbit the sun. it cant because a bunch of other icy planets are in the way. Pluto belongs to a different belt which i forget it's name :) that's why Pluto isn't classified as a planted anymore (as of 2008)