De Revolutionibus Orbium Coelestium

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Today is Copernicus' 538th birthday. On his death bed he published 'On Revolutions of the Celestial Spheres'. The first biggest push towards heliocentrism i.e. planets revolving around the sun. The puzzle today spells the roman numerals for 112, the atomic number of the element Copernicum (Cn) named after Nicolaus Copernicus.
See Also: http://en.wikipedia.org/wiki/Nicolaus_Copernicus

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