Chet Raymo in Science Musings:
Sometimes it’s fun to think about things that no one has thought about before.
Some things are thought about for the first time because to do so requires genius. For example: Darwin thinking about evolution by natural selection, Einstein thinking about relativity, or Watson and Crick thinking about the DNA double helix. Being the first to think about those sorts of things can win you a Nobel prize.
Other things are thought about for the first time because they are so utterly commonplace that no one has bothered to think about them before. These are the kind of things I like to think about.
Consider starlight. What could be more commonplace than starlight?