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
European Astronomical Society , the president of the Society is Thierry Courvoisier (Switzerland). Maarten Baes (Belgium) serves as the "EAS Newsletter" editor. Since 2008 the European Astronomical Society has awarded the annual Tycho Brahe Prize, named in honour of the influential sixteenth century Danish astronomer Tycho Brahe. The prize is given in recognition of the development or exploitation of European instruments, or major discoveries based largely on such instruments. Since 2010 the EAS awards the Lodewijk Woltjer Lecture to honour astronomers of outstanding scientific distinction. Since 2013 the EAS is also awarding the MERAC Prizes for young European astronomers. There are yearly three