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Nicolaus Copernicus (view source)
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[[Image:Nicholas_copernicus.gif|thumb|right|150px|Nicholas Copernicus]]
[[Image:Nicholas_copernicus.gif|thumb|right|150px|Nicholas Copernicus]]
'''Nicolaus Copernicus''' (Polish:Mikołaj Kopernik, 1473-1543) was a [[Polish]] scientist, who published a model of the [[solar system]] that combined the [[heliocentrism]] of [[Aristarchus]] with the epicycles of [[Ptolemy]]. "Finally we shall place the Sun himself at the center of the Universe. All this is suggested by the systematic procession of events and the harmony of the whole Universe, if only we face the facts, as they say, 'with both eyes open.'"
Copernicus worked for years on his book describing his theory, and published it near the very end of his life. He entitled it, "De revolutionibus orbium coelestium" ("On the Revolutions of the Heavenly Spheres"), and published it in 1543. The major parts of Copernican theory are:
== Life ==
Copernicus was born in 1473 in Thorn as the youngest of four children. Between 1491 and about 1494 he studied liberal arts, as well as [[astronomy]] and [[astrology]] at the University of [[Cracow]]. He left before completing his degree, resuming his studies in [[Italy]] at the University of [[Bologna]], where he intensively dealt with astronomy.<ref>http://www.britannica.com/biography/Nicolaus-Copernicus</ref>
Copernicus worked for years on his book describing his theory of the [[solar system]], and published it near the very end of his life. He entitled it, "De revolutionibus orbium coelestium" ("On the Revolutions of the Heavenly Spheres"), and published it in 1543. The major parts of Copernican theory are:
# Heavenly motions are uniform, eternal, and circular or compounded of several circles (epicycles).
# Heavenly motions are uniform, eternal, and circular or compounded of several circles (epicycles).
# The center of the universe is near the [[Sun]].
# The center of the universe is near the [[Sun]].