NS206_Ch2 - NS 206 Inside the Milky Way? History of...

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NS 206 Inside the Milky Way? History of Astronomy, Copernican Revolution (Chapter 2)
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Midterm Exams 1 st MT Exam 5 November 2008 Wednesday 5:40 7:30 15:40 – 17:30 2 nd MT Exam 3 December 2008 Wednesday 15:40 – 17:30
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The Early Astronomy Astronomy in China – A working calendar was devised – Prediction of seasons – Measurement of the length of the year – Earliest star maps, constellations – Prediction of solar eclipses – Nova observations (e.g., Supernova in 1054)
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Crab Supernova Remnant
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The Early Astronomy • Babylonian Astronomy – A good calendar (360 days long years) vention of sundial; minutes, seconds – Invention of sundial; minutes, seconds – Prediction of the sun, moon and planet positions – Start of astrology (12 constellation of Zodiac)
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The Early Astronomy • Egyptian Astronomy – Religious men were astronomers evelopment of a really good calendar to – Development of a really good calendar to predict the annual flooding of the Nile – Development of primitive geometry and land survey
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Early Greek Astronomy • Ionian School – Thales of Miletos: Geometry, ecliptic, seasons • Pythagorean School – Pythagoras: 7 spheres for 7 planets, all heavenly bodies must be spherical. – Eudoxus of Cnidus (~400 BC): 27 spheres (4
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NS206_Ch2 - NS 206 Inside the Milky Way? History of...

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