The Rema in Toras HaOlah (1:2) states clearly that we assume rabbinic science to be infallible, and ancient rabbinic knowledge of astronomy complete.
Even when you have direct evidence to the contrary?
Chazal say that lice don’t come from eggs (and therefore we can kill them on Shabbos). However, we can observe that lice, in fact, do come from eggs laid by other lice.
If I were to show you a louse hatching from an egg, what would you tell me? That what I’m seeing is not, in fact, happening? That I’m witnessing an illusion? Or would you just close your eyes, put your fingers in your ears and go “la-la-la I see nothing!” at the top of your lungs?
What would you do when presented with direct evidence that Chazal were wrong on a point of science?
The Wolf