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
HEAT 1X Tycho Brahe successful tests of the solid fuel epoxy and the liquid oxidizer nitrous oxide, which was used in their hybrid rocket HATV ("Hybrid Atmospheric Test Vehicle"). The HATV rocket was only 1/3 size of the final rocket, HEAT. This HEAT rocket ("Hybrid Exo Atmospheric Transporter") with liquid oxygen and polyurethane, would carry the MSC ("the micro-spacecraft") above the 100 km boundary and into space. The MSC was named after Tycho Brahe, and the combination was known as the HEAT-1X TYCHO BRAHE. Gravity would then pull the MSC back to the atmosphere, where the MSC landed on water using parachutes. The first