Why inversion? (meets the eye)

I came across this sentense as follow:
"These vast clouds of organization---in which galaxies behave like swarming dust motes--- have taught astronomers that there is much more to the universe than meets the eye."
Why "meets the eye" , not "the eye meets"? Is it an inversion? Why using inversion here?
Thank you for any information related to above questions in advance.

'more than meets the eye' is an idiom, meaning that there is more there than is at first obvious. Often used metaphorically, for example with regards to someone's personality, rather than about something you are literally looking at.

'There's more to him than meets the eye' means that there is something about his skills/character/personality that may not be obvious.

In the original example, it seems to be implying that not everything in the universe can be explained purely by science.

First of all, thank you all for help.
I think there are some cultural differences among different countries. In China, we never say :"sth meets the eye" , but we do say:" the eye meets sth". So that is how my question raised here.
Thank you again for help!