I've noticed that there are (at least) two kind of photos of the famous Buzz Aldrin posing. and Other one is more gray, and other one has greater contrast with darker boundaries. What's the story behind this difference? I don't have a link now, but I recall I once read somewhere that the grayer one is the original. Am I correct to guess, that NASA has some artists whose purpose is to make photos more romantic? And some photos get secondary versions that are supposed to look better?