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In page Domenico Maria Novara da Ferrara:

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Novara's writings are largely lost, except for a few astrological almanacs written for the university. But Copernicus's De revolutionibus orbium coelestium (published in 1543, long after Novara's death) records that on 9 March 1497 Novara witnessed Copernicus first observation. Both men were described as "free minds and free souls," and Novara believed that his[citation needed] findings would have shaken Ptolemy's "unshakable" geocentric system.