part1_intro - 8/23/2009 Celestial Sphere Useful for mapping...

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8/23/2009 1 Celestial Sphere Useful for mapping the sky A Model – NOT REALITY Assumption Earth is in the middle Earth does not move Stars at the same distance North Celestial Pole South Celestial Pole Celestial Equator Zenith = location directly over your head 90º above the ground Horizon = where the sky and ground meet At the ground (0º) How do you describe other locations?
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8/23/2009 2 North Celestial Pole South Celestial Pole Celestial Equator Celestial Equator Celestial North Pole Your zenith Cedar Falls Latitude = 42.5º N Angle of object from Celestial Equator? Declination (dec.) Angle of an object in sky from Celestial Equator North Celestial Pole South Celestial Pole Celestial Equator Dec = 0º Northern Dec Southern Dec Right Ascension Dec = 90º N Dec = 90º S
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8/23/2009 3 E S W N Zenith Meridian Latitude = 42.5º N Zenith Dec = 42.5º N North horizon South horizon Celestial Equator Dec = 0º Celestial North Pole Dec = 90º N Polaris Height above
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This note was uploaded on 12/25/2011 for the course ASTRONOMY 086 taught by Professor Klazner during the Fall '09 term at Everglades.

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part1_intro - 8/23/2009 Celestial Sphere Useful for mapping...

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