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Bozidar Mitrovic

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Astronomy LecturethSeptember 28 2011Autumnal equinox Around Sept 21Neither of the two poles is tipped more toward the SundayHence the Sundays are parallel to the earths equatorial planeThe sun is on celestial equator the eclipticthe apparent path of the sun on celestial sphere crosses the ecliptic The sun rises directly east and sets directly westThe night and day are about 12 hours each EquinoxAfter that day the north pole starts tipping away from the sunThe sun moves below the celestial equator the ecliptic is below celestial equator The sun rises south of east and sets south of westFor an observer in the northern hemisphere days are less than 12 hours long and the nights last longer than 12 hours Winter Solstice Around Dec 22The Sun stops its movement below celestial equator Solstice The North pole i
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