Tycho Brahe

Tycho Brahe (1546-1601) was a Danish astronomer. He had an observatory called Uranienborg? on the island Ven? in The Sound, Oresund, between Denmark and Sweden.

While a student, he lost part of his nose in a duel. For the rest of his life, he wore a silver replacement.

Because he disagreed with the new king, he leaved his country and moved to Prague in 1599. Then he built a new observatory and worked there till his death.

Tycho was the preeminent observational astronomer of the pre-telescopic period, and his observations of stellar and planetary positions achieved unparalleled accuracy for their time. After his death, his records of the motion of the planet Mars enabled Kepler to discover the laws of planetary motion which provided powerful support for the [Copernican heliocentric theory]? of the solar system. Tycho himself was not a Copernican, but proposed a compromise system in which the planets other than earth orbited the sun while the sun orbited the earth.