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・ Houphouët-Boigny (disambiguation)
・ Houphouët-Boigny Bridge
・ Houping Miao and Tuzi Ethnic Township
・ Houplin-Ancoisne
・ Houplines
・ Houppelande
・ Houppert Winery Complex
・ Houppeville
・ Houpt, Minnesota
・ Houqua (clipper)
・ Houquetot
・ Hour
・ Hour (disambiguation)
・ Hour 25
・ Hour angle
Hour circle
・ Hour Community
・ Hour Detroit
・ Hour Game
・ Hour Glass (band)
・ Hour Glass (Hour Glass album)
・ Hour Glass (TV series)
・ Hour Magazine
・ Hour of 13
・ Hour of Coming
・ Hour of Decision
・ Hour of Decision (film)
・ Hour of Music
・ Hour of Mystery (British TV series)
・ Hour of Penance


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Hour circle : ウィキペディア英語版
Hour circle

In astronomy, the hour circle of a celestial object is the great circle through the object and the celestial poles. It is perpendicular to the celestial equator. The declination of an object as observed on the celestial sphere is the angle measured along the hour circle of that object to the celestial equator. In other words, it is analogous to meridians or longitudes on a globe. A meridian on the celestial sphere matches an hour circle at any time.
==See also==

* Meridian (astronomy)
* Declination

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Hour circle」の詳細全文を読む



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