It's a weird issue because really it's all vaguely arbitrary distinctions. There's nothing really different between the various celestial bodies and at the sam

It's a weird issue because really it's all vaguely arbitrary distinctions. There's nothing really different between the various celestial bodies and at the same time they're all so vastly different from each other. You have planetary satellites larger than some planets. A couple of planets that are pretty much failed stars. Even things like comets and asteroids, they're really just defined by behavior. I mean the definition of asteroid is basically "not a planet or comet". It's basically all "stuff in space".