Astrophile
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- Aug 30, 2013
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A student in 2020 would get a better grade for drawing a solar system with eight planets plus an asteroid belt (including the dwarf planet Ceres), the Kuiper belt (including Pluto, Eris and other dwarf planets), and the Oort cloud.That's why a student in high school in 1970 can get a good grade for drawing a solar system with nine planets; and a student in 2020 can get a good grade for drawing a solar system with eight.
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