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Neptune is confirmed as a planet because it is partly made of gas much like other planets.However Pluto is made of ice and rock has no atmoshpere and because of its short distance to the Kuiper belt and its size makes astronomers wonder if this is a planet. Plus it doesn't clear it's path of objects that are in it's way.

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What planet is closest to Pluto neptune or uranus?

Neptune is the planet closest to Pluto


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Neptune is always the eight and last planet from the Sun.However, because of the declassification of Pluto from a planet into a dwarf planet, the rules have changed.When Pluto was a planet, it's orbit intersected that of Neptune, so at one period, Pluto was closer to the Sun than Neptune, whereas at other times, it was the other way around.See the related link for a pictorial which gives a pictorial representation.


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