How To Use Hour circle In A Sentence

• Any object on the same hour circle will have the same right ascension, just as any place on earth on the same meridian of longitude has the same longitude.
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• Whereas terrestrial longitude uses meridians of longitude, right ascension uses hour circles which run between the north and south celestial poles.
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• In order to promote economic integration of the Beijing-Tianjin-Hebei region, China plans to build a two- hour circle to cover major cities in the Bohai Rim Region.
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