Aristarchus of Samos (l. c. 310 - c. 230 BCE) was a Greek astronomer who first proposed a heliocentric model of the universe in which the sun, not the earth, was at the center. Although his theory was noted by other thinkers of his time, it was rejected as implausible, and the geocentric model was retained for 1,700 years afterward.
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Definition
Timeline
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c. 310 BCE - c. 230 BCELife of Greek astronomer and mathematician Aristarchus of Samos.
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c. 270 BCEAristarchus of Samos proposes a heliocentric world view.
