If that were accepted, and I'm not saying I disagree, then our system actually has 13 planets, including Ceres, Eris, Makemake and Haumea. Add to that Planet X you get 14 planets total, which is not that big a deal. However, it is conservatively estimated that another 100 Pluto-sized dwarf planets exist out in the deep dark, meaning Sol system would have ~114 planets. That's unmanageable, I think. How are the school children going to memorize them all?Originally Posted by RandBlade
Planet 9 is Pluto
And on the surface, that definition of the "planet" category is offering an equivalency between Ceres, Earth and Jupiter, which is hard to argue makes sense. Sure, there are subcategories... I don't know, Whales, humans, octopuses, gnats and worms are all categorized as animals, so, the merits of subcategorization can't be poo poo'd.... We could call them all Planets, Pluto being in the Dwarf Sub-category, Jupiter in the Gas Giant sub-category, Earth being in the Smallish-Rocky-Wet sub-category.
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