Aristarchus discovered that the Earth is a sphere and that the sun is in the center.
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Aristarchus of Samos was a ancient Greek astronomer and mathematician.
Aristarchus of Samos was an astronomer in ancient Greece. While he made great discoveries in math and science, very little is known about his life or death.
Aristarchus of Samos was a mathematician, scholar, and ancient Greek astronomer. His contribution to astronomy was his presentation of the first model of the Sun being at the center of the universe. In his model he placed the planets in its correct distance around the Sun.
He lived on the Greek island of Samos.
Both postulated on the earth's circumference.