equatorial mounting

British  

noun

1. an astronomical telescope mounting that allows motion of the telescope about two mutually perpendicular axes, one of which is parallel to the earth's axis

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Example Sentences

No part of the equatorial mounting is shown in the figure, as it resembles in every respect the usual Fraunhofer mounting.

From Project Gutenberg

This alteration and the new equatorial mounting have been admirably made by Grubb; the result is completely successful.

From Project Gutenberg

The mechanical parts of this great telescope are by Warner and Swasey of Cleveland, after the well-known equatorial mounting of the Melbourne reflector by Grubb of Dublin.

From Project Gutenberg

The equatorial mounting.—Telescopes are of all sizes, from the modest opera glass which may be carried in the pocket and which requires no other support than the hand, to the giant which must have a special roof to shelter it and elaborate machinery to support and direct it toward the sky.

From Project Gutenberg

Such a support is called an equatorial mounting, and the student should note from the figure that the circles, e, measure the hour angle and declination of any star toward which the telescope is directed, and conversely if the telescope be so set that these circles indicate the hour angle and declination of any given star, the telescope will then point toward that star.

From Project Gutenberg