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projection of the earh's axis on the celestial sphere |
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| points directly above the terrestial poles |
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| point in the sky directly above the observer |
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| line from horizon to horizon that passes through the zenith and the celestial pole |
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| point in time when the sun crosses the meridian. |
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| highest point each star reaches on any given night |
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| imaginary circle that lies 90 degrees from either the north or south celestial pol |
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| projection of the earth's equator on the celestial sphere |
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| the apparent path of the sun across the sky |
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| named after the greek word meaning wanderer |
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| path of the planet from night to night that runs along the eliptic |
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zone 18 degrees wide in the sky, centered on the eliptic, of which the planets follow |
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| occurs on the first day each year when the star can be seen just before dawn |
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| occurs on the last day of each year when the star can be seen at dusk |
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a total of 88 arbitrary groupingd of stars on the celestial equator |
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| shift of the celestial pole and equinoxes caused largely by the gravitational influence of the sun and the moon |
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| number of years required for one precession cycle |
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| two points at which the ecliptic crrosses the celestial equator |
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| vernal and autumal are exampples of... |
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| position in the sky at which the sun is at its maximum declination from the celestial equator |
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| what occurs during summer and winter? |
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| sun crosses the celestial equator moving north |
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| sum crosses the celestial equator moving south |
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| sun reachest point farthest north of the celestial equator |
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| sun reachest point farthest north of the celestial equator |
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| sun reachest point furthest south of the celestial equator |
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| a building aligned east to west |
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| comes from the greek word meaning abandonment |
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| moon is at the farthest point in its orbit during a solar eclispe, only the solr photosphere is visible (as a bright ring) |
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| darker part of a sunspot or, main cone of shadow cast by the moon during a solar eclispe, or the earth during a lunar eclispe |
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| the ligter part of the sunsot, partial shadow around the main cone of shadow cast by the moon suring solar eclispe or the earh during a lunar eclispe |
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| line that connects the only two points where the moon passes throught he earth's orbital plane |
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| about 5 degerees, 18.6 years in a cycle |
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| interval of 6585 dyas or about 18 years used to predict eclispses |
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