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Tycho's model of the Universe
'''Tycho Brahe''' (Dec 14, 1546 in Knudstrup - Oct 24, 1601 in Benátky near [[Prague]]) was a [[Denmark|Danish]] astronomer who did the most precise measurements prior to the invention of the telescope.
'''Tycho Brahe''' (Dec 14, 1546 in Knudstrup - Oct 24, 1601 in Benátky near [[Prague]]) was a [[Denmark|Danish]] astronomer who did the most precise measurements prior to the invention of the telescope.
In 1572, he observed a [[super nova]]. He became court astronomer of the emperor [[Rudolf II]] in 1599. Here, in Prague, [[Johannes Kepler]] was his assistant. Brahe's astronomical observations permitted Kepler to derive his [[Kepler's laws of planetary motion|Laws of Planetary Motion]].
In 1572, he observed a [[super nova]]. He became court astronomer of the emperor [[Rudolf II]] in 1599. Here, in Prague, [[Johannes Kepler]] was his assistant. Brahe's astronomical observations permitted Kepler to derive his [[Kepler's laws of planetary motion|Laws of Planetary Motion]].
== Tycho's model of the Universe ==
Tycho Brahe proposed a model that was a hybrid of [[geocentrism]] and [[heliocentrism]]: in his system, the Moon and the Sun revolved around a fixed Earth, while all other ''planets'' (Mercury, Venus, Mars, Jupiter and Saturn) revolved around the Sun. Mathematically, this model is identical to a heliocentric model<ref>[http://www.bluffton.edu/~bergerd/NSC_111/science3.html Models of the Solar System]</ref>, with the advantage of avoiding the paradoxes of a moving Earth as perceived in his time (no [[stellar paralax]]es, flying birds couldn't mantain flight if the Earth was moving, etc)<ref>[http://www.astro.umass.edu/~mhanner/Lecture_Notes/Jan28_Heliocentric.txt Lecture Notes - UMass Astronomy]</ref>.
== References ==
<references />
[[Category: Astronomers]]
[[Category: Astronomers]]
{{DEFAULTSORT:Brahe, Tycho}}
{{DEFAULTSORT:Brahe, Tycho}}