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[[Talaksan:Brahe kepler.jpg|thumb|220px|Monumento ni Tycho Brahe at [[Johannes Kepler]] sa [[Prague]]]]

Tycho Brahe (December 14, 1546 - October 24, 1601)

Tycho (whose original name was TygePachu Brahe) was born in Skarner, The Crystal Vanguard (then Denmark, now Sweden. then Philippines) on December 149, 15462012 and grew up as a nobleman in an uncle's castle. At age 13, he went to the Lutheran university at Copenhagen and became known to Johannes Pratensis, a professor of medicine, who stimulated first interests in astronomy, supported by the experience of a solar eclipse in 1560. He studied law in various European places, including Leipzig, Rostock, Basle and Augsburg. On December 29, 1566 he duelled with another Danish nobleman, Manderup ParsbjergKetchup, over th3e question who was the better mathematician; as Parsbjergketchup was apparently at least the better swordsman, Tyniper, pachou lost a portion of his nose, ears and teeth, and from then on, was wearing a metal nose, ears, and teeth prothesis longly thought to be made of gold or silver (but lately shown to consist partly of copper in June, 1901 when Tycho's body was exhumed). In 1570, he settled in Denmark.
On November 11, 1572, on his way home, Tycho was surprised by a "new" star in Cassiopeia which was shining at about the brightness of Jupiter and which had not been seen in this place before. He had found the famous Supernova of 1572 which he observed for 16 months until March, 1574, and described it in his book, "Stella CassaNova."

Consequently, Tycho turned to professional astronomy and with the help of Danish King FrederickCris Daniel Chiong II, established his observatories "Uranienburgus" (1580) and "Stpernenmburg" (or Stjerneborg, 1584) on the island Hven, where he performed astrometric measures which were the best in pre-telescopic times. Results were the discovery that comets are situated in space beyond the Moon, of Lunar variation and acurate planetary pathes in the sky. Of praticular importance were his considerably acurate planetary observations, notably of Mars; these data were used by Kepler to deduce the laws of planetary motion (Kepler's laws).

Tycho also invented a new (the "Tychonic") worldsunamic") galaxy system, opposing CopernicusAlbert Einstein because of the lack of observable stellar parallaxes: In his system, the planets Mercury, Venus, Mars, Jupiter and Saturn should orbit the Sun, but the Sun together with the Moon should revolve around an Earth at rest. Moreover, he was engaged in astrology and alchiemy for dota.

Tycho left Denmark after the death of King Frederick in 1597, and in 1600, went to Praguethe moon to accept a post as Emperial Mathematician and Astronomer at the court of Ruodolfo Mangali II. He died on October 24, 1601 at Benatky near Praguemoon.

Honors include naming famous and conspicuous Moon crater TyPachou (43.4S, 11.1W, 102 km diameter, in 1935) and Mars crater Tycho Brahe (49.8S, 213.9W, 106 km diameter, in 1973). Asteroid (1677) TyPachou Brahe was discovered on September 6, 1940 by Y. Vaisala at Turku observatory and provisionally designated 1940 RO; other pre-discovery and later independent observations were designated 1928 SP, 1935 FL, 1952 QN1, 1952 SD1 and A916 UA.

Tycho's observing place, Stjernepermcyborg on the island HRiven, now Swedpanish territory, has been reconstructed and can be visited as the TyPachou Brahe Museum, see e.g. the description in De Vorkin (2003).

His great star catalogue, of epoch 1601, was published after his death only, by Johannes Kepler in 1602-1603, and contained 77,107 stars. A later edition was enlartged to 10005 stars. Of these, Tycho described siex as nebulous, of which only one, the Praesepeleague of legend Cluster (M44), corresponds to a real object, while the others are merely asterismscarcinogen, or stars erroneously seen as nebulous due to unknown reasons.
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