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
MF Tycho Brahe in Tomrefjord, Norway. Currently, the ship is owned by Scandlines A/S and operated by Scandlines GmbH. Between 1991 and 1997, M/F "Tycho Brahe" was owned by DSB Rederi. M/F "Tycho Brahe" can carry 1250 passengers, 260 trucks, 240 cars and 9 passenger train coaches at one time. The ship has three railtracks with the total length of 266 meters. M/F "Tycho Brahe" has a sister ship, . The two ships are scheduled to be converted to full electric propulsion with 4 MWh batteries each, being recharged from land by a robot when docked. Two of the four diesel engines will