Meaning of celestial longitude in English:

celestial longitude


  • The angular distance of a point east of the First Point of Aries, measured along the ecliptic.

    Compare with right ascension

    ‘But in fact, from day to day the earthbound observer does see the midday Sun at a different point along the same celestial longitude - up or down relative to the horizon.’
    • ‘By the time he returned home in January 1678, he had recorded the celestial longitudes and latitudes of 341 stars and observed a transit of Mercury across the Sun's disk.’
    • ‘Technically, a conjunction describes a precise alignment of heavenly bodies that happen to have the same celestial longitude - that is, they appear to line up in the sky, one directly above the other.’
    • ‘The Moon's motion along the ecliptic is measured in degrees and minutes of celestial longitude, but its orbit does not align exactly with the ecliptic.’
    • ‘In this case, Mayan astronomers apparently focused on two cycles related to the number of days that elapse between consecutive passages of Mars through a given celestial longitude while traveling across the sky.’