Definitions for vertical circle

This page provides all possible meanings and translations of the word vertical circle

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  1. vertical circle(noun)

    a great circle on the celestial sphere passing through the zenith and perpendicular to the horizon

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  1. Vertical circle

    In astronomy, a vertical circle is a great circle on the celestial sphere that is perpendicular to the horizon. Therefore it passes through the zenith and the nadir. There is a vertical circle for any given azimuth, where azimuth is the angle measured east from the north on the celestial horizon. The vertical circle which is on the east-west direction is called the prime vertical. The vertical circle which is on the north-south direction is called the Local Celestial Meridian or Principal Vertical. Vertical circles are part of the horizontal coordinate system.

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