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© Sierra College Astronomy Department

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Ancient Astronomy Mesopotamian/Babylonian Astronomy

Made the first long term records of astronomy

Created the 12 zodiacal constellations

Developed the angle measuring system we use

Used leap months in calendar

Discovered patterns of planetary motions by keeping track of synodic periods

Interest in planetary positions was due to their interest in astrology, the belief that the positions of celestial objects influence events on the Earth

They developed mathematical description of planetary motions and could make crude predictions

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