I have seen many people talking about taking shots of stars and such with long exposures... I'm really new to photography, so I have no idea what anyone is talking about... Will someone help me? 1) What is a long exposure? 2) What effect does it create? 3) Does anyone have a picture so I can see how it's supposed to look? 4) What else can you shoot long exposures of except stars? 5) What purpose does it serve? 5) How do I do it with my 350D? Sorry for all the questions, but I'm sooo freakin new to photography.