Copernicus

When I read about Copernicus' hypothesis on why the earth was round and why it was not the center of the earth it caught me by surpise. Today we have the technology to go into space, and also during OUR lifetime we've known that the world is round and that that we go around the sun. It blows my mind that Copernicus was able to come up these educated guess' on his own, without the ability to go into space of have satellites take pictures to prove he was right. Although he died before his book was published, he defnitley would have looked insane for even thinking what he had written about, when he was actually correct. I can't imagine how much research and testing was involved for him to get the points he wanted to proved his hypothesis valid.