Manderup Parsberg Manderup Parsberg Manderup Parsberg (December 24, 1546 - November 11, 1625) was a Danish nobleman and politician who was member of the Royal Privy Council to King Christian IV of Denmark. As a student at the University of Rostock he participated in a duel against his third cousin Tycho Brahe in which he cut off most of his nose. The two later became good friends, and he married Tycho's distant cousin Anne Pedersdatter Brahe (1578-1633). Parsberg was lord to Hagesholm. When, in a funeral oration for Brahe, an allusion was made to their unfortunate duel, Parsberg protested and sought redress
Two-body problem in general relativity The Kepler problem derives its name from Johannes Kepler, who worked as an assistant to the Danish astronomer Tycho Brahe. Brahe took extraordinarily accurate measurements of the motion of the planets of the Solar System. From these measurements, Kepler was able to formulate Kepler's laws, the first modern description of planetary motion: Kepler published the first two laws in 1609 and the third law in 1619. They supplanted earlier models of the Solar System, such as those of Ptolemy and Copernicus. Kepler's laws apply only in the limited case of the two-body problem. Voltaire and Émilie du Châtelet were the