In the 16th century, Copernicus put forth his controversial concept of a heliocentric solar system, in which the planets revolved around the sun — not the Earth.
16世纪，哥白尼提出了颇具争议的日心说，认为行星围绕太阳运转而非地球。
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It was there, 18 centuries before the Copernican revolution, that Aristarchus posited a heliocentric solar system and Eratosthenes calculated the circumference of the Earth.