Astrophysics (Index)About

altazimuth mount

(alt-azimuth mount, altitude-azimuth mount, azimuth-elevation mount)
(simple two-axis telescope mount)

An altazimuth mount (aka alt-azimuth mount, altitude-azimuth mount, azimuth-elevation mount) is a straight-forward mount of a telescope on a horizontal axle, in turn, mounted on a vertical axle. The design can provide the means to view any portion of the visible sky. Such a telescope can be termed an altazimuth telescope.

The main alternative is the equatorial mount, which has an axle parallel to the Earth's axis of rotation, so a simple, constant velocity rotation allows it to track objects in the sky. Equatorial mount was once preferred, but being bulkier, makes a significant difference for large telescopes, and with the development of computer control, the coordinated adjustments necessary to track objects similarly same with an altazimuth telescope are easily handled.


(telescopes,mount)
Further reading:
http://en.wikipedia.org/wiki/Altazimuth_mount

Referenced by pages:
Large Altazimuth Telescope (BTA-6)
equatorial mount
horizontal coordinate system
Mercator Telescope
William Herschel Telescope (WHT)

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