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Pythagoras and students develop a model of solar system. The model of Pythagoras used circular paths for the celestial bodies and assumed most celestial bodies are spheres.
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Lunar eclipse delays evacuation of Athenian army from Sicily. The Greeks regarded eclipses as uncertain omens. The delay doomed the Athenian army.
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Anaximander describes model of Earth, Sun, Moon, stars. Anaximander's model was the forerunner of later Greek attempts to explain the heavens in non-mythological terms.