and anyways, for someone who doesn't study astronomy, they probably don't visualize the entire solar system and what is in the middle and such, they probably just think about the rising and setting of the sun, and figure that the sun has a pretty steady rate of doing that, while the moon doesn't always show, and changes and such... maybe he doesnt know that either and thinks of the moon like it is a really big star that is always in the sky you just can't see it when the sun is out...