Otte Brahe Otte Brahe Otte Brahe (; 2 October 1518 – 9 May 1571) was a Danish (Scanian) nobleman and statesman, who served on the privy council (Rigsraad, "Council of the Realm"). He was married to Beate Clausdatter Bille and was the father of astronomer Tycho Brahe. Brahe was born in Tosterup to Tyge Brahe and Sophie Rud. He was nephew of Anne Rud and Henrich Krummedige. Brahe married Beate Clausdatter Bille in 1544. Both the Brahes and the Billes were among the most powerful noble families in Denmark during their lives. Both families owned farms, forests, and land as well as
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