"Copernican system." YourDictionary, n.d. Web. 15 October 2018. <http://www.yourdictionary.com/copernican-system>.
Copernican system. (n.d.). Retrieved October 15th, 2018, from http://www.yourdictionary.com/copernican-system
From Copernicus (“a surname”) + -an + system. After Polish astronomer Nicolaus Copernicus, who formulated and proposed the theory.
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