Comment by saghm

> For Pluto, it is a round lump of rock going around the Sun on it's own separate orbit

That was never the reason anyone got upset at it being "demoted", or else they'd be equally upset about all of the other ones that were never planets in the first place (which in fact are in fact the main argument for why it got reclassified). People just don't like change, especially for things that seem like "facts".