Someone should make an astronomy shitpost site where the goal is to come up with a better definition of planet than the IAU, and people can vote on them and point out edge cases

today's bad definition:
any object in space big enough to be visible by a telescope that's not actively undergoing fusion and isn't orbiting another planet (in which case it's a moon)

obvious edge cases: black holes are planets.
rogue planets are planets, but so are white dwarfs and black holes.

pluto arguably STILL isn't a planet, since it and charon have that barycenter orbit going on. which I think makes them both moons?

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@foone
Are structures partially made up of things undergoing fusion planets?

If no: Earth isn't a planet whenever someone is running their fusion reactor prototype. If yes: galaxies are planets (there's a lot of non fusing gas and dust in them)

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