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The picture above, of Pluto and its moon Charon, is 50 times larger than the scale of this model.
Pluto's orbit is significantly different than the other planets, it is a longer and narrower ellipse. Pluto is thus closer to the Sun than Neptune for 20 years of its 249 year orbit. Pluto crossed Neptune's orbit January 21, 1979, and was closer to the Sun than Neptune until February 11, 1999. This will happen again in September 2226. The composition (frozen Methane and Nitrogen), size, and eccentricity of Pluto's orbit make it different from the four other outer planets that are Gas Giants.
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