You’d need a telescope to see the rings.
But you could (theoretically) figure out we live in a Copernican system with the naked eye.
“You’d need a telescope to see the rings.”
Exactly my point. And while Uranus can be seen with the naked eye, even it wasn’t discovered until 1781. Neptune and Pluto are out of the question. The claim by some that the Sumerians had this knowledge by any method is nonsense. As far as Copernicus goes, I’m not sure even he believed what he had devised (he waited until he lay on his deathbed to announce his findings). The development of the Copernican System is one of the primal monuments of human ingenuity.