I hasn't cleared its orbit of debris thats why its not a planet.
Also its orbit is highly eccentric and irregular.
There are 9 moons in the solar system that are bigger than it.
Its a big ball of ice pretty much.
Yeah it has an atmosphere made just out of nitrogen and its slowly escaping into the Kuiper belt so it doesn't have a proper one.
Its not a planet ok?
English
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New Coke isn't Coke either. Sorry, I don't buy into "new" astronomy definitions of a planet.
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Ok call Ceres,Eris,Quaour,Varuna,Ixion,S1992/kp1,and Sedna planets too
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Don't be an idiot. It's called historical precedence.
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And don't forget Orcus and its little moon Vanth!