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Copernicus worked for years on his book describing his theory, and did not publish it until 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 work was far from perfect:  Copernicus assumed that the planets moved in circular revolutions (they actually revolve in ellipses, though the orbit of the earth is nearly circular), and Copernicus also thought that the sun stood motionless as some kind of stationery temple in the universe.

Copernicus worked for years on his book describing his theory, and did not publish it until 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 work was far from perfect:  Copernicus assumed that the planets moved in circular revolutions (they actually revolve in ellipses, though the orbit of the earth is nearly circular), and Copernicus also thought that the sun stood motionless as some kind of stationery temple in the universe.

The reception to his work was initially positive within the Catholic Church (contrary to popular belief, [[Galileo]] was not persecuted for supporting the Copernican theory, but because he was disrespectful to the [[Pope]]). However, the reaction was negative among Protestants who felt it conflicted with some literal interpretations of the Bible, such as the account of how Joshua benefited from the sun standing still as it passed over the earth.  "And the sun stood still, and the moon stayed, until the people had avenged themselves upon their enemies. Is not this written in the book of Jasher?  So the sun stood still in the midst of heaven, and hasted not to go down about a whole day."  Joshua 10:13.  But there were few Protestants in Poland then (or now), and Copernicus died without much controversy. To this day, most Protestant countries reject the Copernican theory.

The reception to his work was initially positive within the Catholic Church (contrary to popular belief, [[Galileo]] was not persecuted for supporting the Copernican theory, but because he was disrespectful to the [[Pope]]). However, the reaction was negative among Protestants who felt it conflicted with some literal interpretations of the Bible, such as the account of how Joshua benefited from the sun standing still as it passed over the earth.  "And the sun stood still, and the moon stayed, until the people had avenged themselves upon their enemies. Is not this written in the book of Jasher?  So the sun stood still in the midst of heaven, and hasted not to go down about a whole day."  Joshua 10:13.  But there were few Protestants in Poland then (or now), and Copernicus died without much controversy.  

[[Image:Copernicus_system.gif|thumb|left|300px|The Copernican System]]

[[Image:Copernicus_system.gif|thumb|left|300px|The Copernican System]]