You searched for: “altazimuth”
altazimuth (s) (noun), altazimuths (pl)
An instrument used in navigation which measures the altitude and azimuth (horizontal angular distance from a referenced direction) of celestial bodies: "An altazimuth shows the extent or amount or quantity or degree of something with both horizontal and vertical graduated circles or for the simultaneous observation of horizontal and vertical directions or angles."
Word Entries at Get Words containing the term: “altazimuth”
A way of arranging a telescope mount so that the telescope can move parallel to the horizon (azimuth) and at right angles to the horizon (altitude).
Very easy to mechanize, it is becoming more popular in combination with computer control systems, which can alter the altitude and azimuth angles to follow the path of a star as it rises and sets.