Changes

== Life ==

== 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 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>https://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:

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: