celestial longitude

Noun

Meaning

(astronomy) the equatorial coordinate specifying the angle, measured eastward along the celestial equator, from the vernal equinox to the intersection of the hour circle that passes through an object in the sky; usually expressed in hours and minutes and seconds; used with declination to specify positions on the celestial sphere

Source: WordNet

Synonyms

Hypernyms

Examples

one hour of right ascension equals fifteen degrees Source: Internet

Diagram illustrating the difference between the Sun's celestial longitude being zero and the Sun's declination being zero. Source: Internet

Xiàzhì more often refers in particular to the day when the Sun is exactly at the celestial longitude of 90°. Source: Internet

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