I was unsure of where to post this so that it would get attention. I am preparing a short lecutre about the Earth's atmosphere and I need to know the following(which I have not found answers to elsewhere): How would be experience standing on Earth without an atmosphere? Would we be totally blinded by the sun? Would stars be visible any longer or yet more clear? How much time would it take before we, by the radiation, developed all cancer-types we know of and died? How would be experience night compared to day?