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So what? Is 10 some mental limit of names for most population? If I can memorize 8 I can handle 12 or 15, or neither. Making up sub-categories is such a typical bureaucrat's approach to problems.

Why should giant planets be in same category as normal ones? Why mixing ringed with non-ringed? Why mixing moonless with moon-enabled? Gas/liquid ones and solids? I could go on for a long time.



> If I can memorize 8 I can handle 12 or 15, or neither.

Current estimates expect about 200 Pluto-sized objects in the Kuiper belt and about 10'000 in the surrounding region.

Compared with 4 rocky planets, 2 gas giants and 2 ice giants.




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