But you've heard of this theory that the Sun is bigger than the Earth and you knew it enjoys considerable support, yes?

Yes it makes sense, why would you name them based on apparent size? Everyone knows the scale of these things, we learn them in elementary school. I don't think of the sun as smaller than the Earth, and I definitely don't think of the sun as smaller than the moon. Moon < Earth < Sun < Stars makes perfect sense to me. It (imo) is much clearer than Haiku < Sonnet < Opus < Fable, although I get what Anthropic is going for there too.

And I don't think or know Latin either, but these are pretty universally known words even outside of Latin (besides maybe astra, although "astral" is very close so you should be able to figure it out).