Tycho Brahe produce much of his astronomical data, Tycho relied heavily on the then new technique of "prosthaphaeresis", an algorithm for approximating products based on trigonometric identities that predated logarithms. Although Tycho admired Copernicus and was the first to teach his theory in Denmark, he was unable to reconcile Copernican theory with the basic laws of Aristotelian physics, that he considered to be foundational. He was also critical of the observational data that Copernicus built his theory on, which he correctly considered to have a high margin of error. Instead, Tycho proposed a "geo-heliocentric" system in which the Sun and Moon orbited
Tycho Brahe from an observed star or planet, to affect the apparent direction of the body observed. Tycho Brahe also worked in medicine and alchemy. He was strongly influenced by Paracelsus, who considered the human body to be directly influenced by celestial bodies. The paracelsian view of man as a microcosm, and astrology as the science tying together the celestial and bodily universes was also shared by Philip Melanchthon, and was precisely one of the points of contention between Melanchthon and Luther, and hence between the philippists and the gnesio-Lutherans. For Tycho Brahe there was a close connection between empiricism and natural