Ugh.
There are so many ways that planets could be reclassified, including the questionable "historical value" method, which requires Pluto be classified as a planet purely because it has been for so long. Also (depending on how you do classify it) the first and only planet discovered in the USA. As it happens, there are quite probably hundreds, if not thousands or millions of Pluto-like planetoids in the dark reaches of the far outer Solar system. If they can't be called planets, then Pluto can't be, as many are bigger than it is. Pluto was only considered to be a planet on its discovery because what turned out to be Charon was thought to be part of Pluto's mass. However, if Pluto and Charon are classed as Twin planets, then that might be a way around that particular issue. Though nowhere near the end of it.
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