I'm sitting at anchor (Lynyard Cay) under a full moon and it's almost like daylight. We've all seen this, many times. But I don't get it. The moon is a tiny part of the sky, much smaller than a dime. It's not a mirror, it's covered in dust. Yet that one small disk can reflect enough light back here for me to see everything around me. How can that be? I've had four years of physics classes and it still seems impossible. Do any of you get how this happens?