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Aristarchus of Samos
Aristarchus of Samos (310 BCE – ca. 230 BCE) of Samos... ancient Greek astronomer and mathematician who... first... placed the Sun at the center of the known universe with the Earth revolving around it.... His astronomical ideas were often rejected in favor of the geocentric theories of Aristotle and Ptolemy. | Abridged from http://en.wikipedia.org/wiki/Aristarchus_of_Samos
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