Astronomy
The MeaningThe word "Astronomy" means star in Greek. It means the study of outer space. The Greeks were known to be experts in Astronomy.
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Aristarchus
Many Greeks studied the sun, moon, and stars but Aristarchus came up with the idea of the sun being the center of the universe. Many Greeks were upset about this idea.
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HipparchusHipparchus was a Greek scientist who studied more then 850 stars. He also made estimates of the distance between Earth and the sun and moon.
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