• word of the day

    celestial longitude

    celestial longitude - Dictionary definition and meaning for word celestial longitude

    Definition
    (noun) (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
    Synonyms : ra , right ascension
    Example Sentence
    • one hour of right ascension equals fifteen degrees
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