why pluto is not a planet?

Question

describe y pluto is not a planet any more

Answer 1

Its too small, if we considered pluto a planet then many moons and asteroids would qualify as well. Personally I think we should bend the rules because it's pluto. I heart pluto *tear*

Answer 2

The definition of planet was defined in 2006 by the IAU (International Astronomy Union) that a planet must be: A celestial body that: (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has cleared the neighbourhood around its orbit.
As pluto did not did not qualify for these features, it isn't a planet.

Answer 3

Pluto is a dwarf planet

Answer 4

The short answer is that it is too small to be considered a planet. It was reclassified as a "dwarf planet."

Here is a link to the current wikipedia entry:


http://en.wikipedia.org/wiki/Pluto

Answer 5

Pluto is not considered a planet because it is very small and is composed of mostly ice and frozen gasses. Its composition more closely resembles a comet than a planet. (I am reasonably sure Clyde Tombaugh is rolling in his grave over this.)

Answer 6

From what I understood it was more of its irradic orbit more than anything else