I don't see a discussion of the actual technical definition. Only bad semantics. Wikipedia, in brief: "In the end stages of planet formation, a planet will hav

I don't see a discussion of the actual technical definition. Only bad semantics. Wikipedia, in brief: "In the end stages of planet formation, a planet will have "cleared the neighbourhood" of its own orbital zone, meaning it has become gravitationally dominant, and there are no other bodies of comparable size other than its satellites or those otherwise under its gravitational influence." Note that this definition has to make an allowance for Earth, because our moon is "of comparable size" by some definitions, but it is also under Earth's influence. (Pluto and its moon co-orbit a point beyond the surface of Pluto so if Pluto is a planet why not Charon)