I'm not sure what your question is but as you've tried to ask it 3 times it must be important to you so I suggest Copernicus may be the answer you are looking for. Actually Plato said it much earlier but he wasn't really an astonomer.
Just a tip for the future- I think it helps if you use a shorty snappy title and then put your question clearly in the Question Details box. For example "Who was the first..."