Astrolabe Glossary and Notes


The horizontal angular distance in degrees along an observer’s horizon between the north or south point of the meridian line and the perpindicular line drawn from the celestial body to the horizon. On astrolabes, this distance is commonly measured from the closest meridian line and does not exceed 90°. In modern astronomy, the azimuth is the direction of a celestial body measured clockwise in degrees from the north. The azimuth is commonly used along with the altitude.
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