I was stood looking through the fence at the telescope when a child turned up with his dad. He asked his dad "How do they make it turn round?". His dad said "It's got wheels." The child said "I can see that, but how do they get the wheels to turn on something so heavy?"
My problem as a physicist is that I take to many things forgranted. I hadn't thought about the technical problem of producing a mechanism to turn such a heavy piece of equipment. It's obvious that it turns, because it does! I tend to get stuck in "It's like that, and that's the way it is" thinking. The best physics don't ignore it because it works. They ask howit works and why it works.
