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Validity of Pluto as a planet

Argue against the fact that Pluto shouldn't be considered a planet.

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Points that Pluto is not a planet:

1. Pluto has a diameter of 0.17 Earth's diameters -- smaller than the Earth's Moon.
<br>2. While the orbits of most planets in the Solar System are in one plane the orbit of Pluto is inclined. This fact suggests that Pluto doesn't even ...