My brain immediately translated "Luna -> Terra -> Sol -> Astra" to "Moon -> Earth -> Sun -> Galaxy", an overall growing of size. While sure, "astra" doesn't directly translate to "galaxy", it's the base of the word "astronomical" and "astronomy".

I feel like people who don't get it immediately are just being deliberately obtuse.

i think you underestimate how much you "just getting it" stems from being terminally online - this is a HN model release thread after all

Astra means stars.

The more obvious, to me, interpretation was distance from us so I would've expected Terra -> Luna -> Sol -> Astra.

When I think of space and astronomical scales, I think of distance as much more common concern.

I don't doubt that you feel that way, and there's no way I can really provide you any evidence. But I wasn't trying to be obtuse.