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12 years ago
The Sun and stars rise in the east, and set in the west.  Contrast ancient and modern explanations for this observation. 
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12 years ago
The ancients thought there was a vast celestial sphere, spinning over our heads once a day, and that the stars, Sun, Moon, and planets are all carried along for the ride.  We now recognize it is the earth itself that rotates eastward, creating this apparent westward motion of celestial bodies. 
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