"[Copernicus'] famous book De Revolutionibus Orbium Coelestium (On the Revolutions of the Heavenly Spheres), in which he first proposed that the Earth revolves around the Sun, was published after his death. And astronomy was little more than a spare-time occupation for the clerical man whose name now stands as one of the most significant in the history of science." Link.

Polish archaeologists believe they've located Copernicus' remains.