Why does Galileo's Siderius Nuncius so exaggerate the size of the crater Eratosthenes?
He's struck by it, obviously; but he places it more centrally and records it as being much larger than it actually is. It's as if he's looking for an aesthetic harmony, or balance, in what he sees. Or more fancifully: it's because he wants to give the moon a mouth. ('Ooo!' says the moon.) This is because Galileo, and his magic optic tube, and his book, is, in a manner of speaking, giving the moon a mouth ... giving it voice, that is.