An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

1) A → mounting for → telescopes that permits both → vertical and → horizontal → rotation.
2) A telescope having such a mounting.
See also: → altazimuth coordinate system, → altazimuth instrument, → altazimuth mounting.

Altazimuth, from alt(itude) + → azimuth.

Farâzâ-sugân, from farâzâ, → altitude, + sugân, → azimuth.

The coordinate system in which the position of a body on the → celestial sphere is described with respect to an observer's → celestial horizon and → zenith. The coordinates of a point in this system are its → altitude on the → vertical circle, and its → azimuth westward (clockwise) along the celestial horizon from the observer's south. Same as → horizon coordinate system.

→ altazimuth; → coordinate; → system.

A telescope that moves vertically along the → altitude circle of a celestial body and horizontally along its → azimuth circle.

→ altazimuth; → instrument.

A → telescope mounting which has its two axes of movement aligned with the → horizon and the → zenith.

→ mounting; → mounting.