Tycho Brahe

Tycho Brahe (born Tyge Ottesen Brahe) (December 14, 1546 – October 24 1601) was a Danish nobleman known primarily for his work as an astronomer and an astrologer (the two were highly related in his day), as well as an alchemist. He was granted an estate on the island of Hven and the funding to build the Uraniborg, an early research institute, where he built large astronomical instruments and took many careful measurements. As an astronomer, Tycho worked to combine what he saw as the geometrical benefits of the Copernican system with the philosophical benefits of the Ptolemaic system into his own model of the universe, the Tychonian system. His best known assistant was Johannes Kepler, who would later use Tycho's astronomical information to develop his own theories of astronomy.

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He is universally referred to as "Tycho" rather than by his surname "Brahe". Apparently his contemporaries did so and the usage has persisted. His name is pronounced , according to transcription in the International Phonetic Alphabet (in English, it is thought that Teeko is a close approximation of its probable pronunciation).

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While credited with the most accurate astronomical observations of his time, he was unable to carry the implications of the voluminous data he collected to its logical consequences; it was his assistant, Johannes Kepler, whose superior mathematical faculty would enable the full interpretation of his master's acute observations and allow for the discovery of the laws of planetary motion (it should also be noted that none before Tycho had attempted to make so many redundant observations, and the mathematical tools to take advantage of them had not yet been developed). Nonetheless, his mark in science should not be underscored, for he had done what others before him were unable or unwilling to do — to catalogue the planets and stars with enough accuracy so as to determine whether the Ptolemaic or Copernican system was more valid in describing the heavens.

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December 14: December 14 is the 348th day of the year (349th in leap years) in the Gregorian Calendar. There are 17 days remaining....

October 24: October 24 is the 297th day of the year (298th in leap years) in the Gregorian Calendar, with 68 days remaining....

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