Source 11

http://en.wikipedia.org/wiki/Johannes_Kepler
Johannes Kepler was a German mathematician, astronomer, and astrologer. He is best known for his eponymous laws of planetary motion which said that Kepler discovered that the Sun was indeed in the center of the universe like Copernicus had said, but also disproved Copernicus by saying that the planets revolving around the sun were not revolving around it circular, but rather elliptical, with the sun toward the end of the elipse instead of at the center. Kepler lived in an era where there was no clear distinction between astronomy and astrology.