You searched for: “equatorial mount
equatorial mount
A sun-tracking mount, usually clock-driven, whose axis of rotation is parallel to that of the earth.
This entry is located in the following units: equ-, equi- (page 3) -ity (page 7)
Word Entries at Get Words: “equatorial mount
equatorial mount
A telescope mount with one axis parallel to the earth's rotation axis, and the other at right-angles to it.

This enables the telescope, once locked onto a star's position, to track or to follow the star using a motor drive to compensate for the earth's rotation.

Most large telescopes are mounted in this way, but the altazimuth mount, with its simpler construction, is becoming more popular.

An altizimuth mount is a mounting for astronomical telescopes that has separate axes for horizontal and vertical rotation.

Because celestial objects move in arcs across the sky, tracking their motions with an altazimuth mount requires adjustments of both axes.

This entry is located in the following unit: Astronomy and related astronomical terms (page 10)