Ancient Greek astronomer who proposed the heliocentric model — that the Earth revolves around the Sun — approximately 1800 years before Copernicus, with his theory being rejected by the ancient world and largely forgotten.
Proposed the correct heliocentric model of the solar system based on careful observation and geometric reasoning — was rejected by his contemporaries, including Hipparchus — demonstrating that correct scientific ideas can be suppressed for millennia by institutional consensus.
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