500 years ago…

About 500 years ago, Nicolaus Copernicus wrote “Commentariolus”, a treatise laying the basis for his heliocentric (sun-centered) planetary system. He was born February 19, 1473 in Poland.Copernicus

See what CREDO reference says on his treatise at http://goo.gl/b95R0.
See what the Library holds on Copernicus at http://goo.gl/g933h.
Check the Tech eJournals on astronomy at http://goo.gl/fNMES.