Which ancient astronomer first suggested the Sun occupied the center of known celestial bodies?

Answer

Aristarchus of Samos.

Around the third century BC, Aristarchus of Samos proposed the heliocentric notion, suggesting the Sun, rather than the Earth, was the center of the known celestial bodies.

Which ancient astronomer first suggested the Sun occupied the center of known celestial bodies?

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Models of the Universe [Geocentric to Heliocentric] - YouTube

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