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WordNet-Online
Definitions from WordNet | ||||
Definitions from the WebHour CircleNoun Sense 1: In celestial navigation, an hour circle is an imaginary circle on the celestial sphere that passes through the celestial poles and a specific celestial object. It is used to measure the object's hour angle. Sample sentence: During our night sky observation, we used the hour circles to determine the altitude and azimuth of celestial bodies. Noun Sense 2: In horology, the hour circle refers to the ring or scale on a watch or clock that displays the hour numerals or marks. Sample sentence: The intricately engraved hour circle on the antique pocket watch caught everyone's attention. Noun Sense 3: In astronomy, an hour circle indicates the circle passing through a specific right ascension on the celestial sphere. Sample sentence: The hour circle of the equinox is particularly important for determining the positions of celestial objects at different times of the year. Related products on Amazon: | ||||
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