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Equatorial Mounting |
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equatorial mounting: see telescope telescope, traditionally, a system of lenses, mirrors, or both, used to gather light from a distant object and form an image of it. Traditional optical telescopes, which are the subject of this article, also are used to magnify objects on earth and in astronomy;
..... Click the link for more information. . equatorial mounting [‚e·kwə′tȯr·ē·əl ′mau̇nt·iŋ] (engineering) The mounting of an equatorial telescope; it has two perpendicular axes, the polar axis (parallel to the earth's axis) that turns on fixed bearings, and the declination axis, supported by the polar axis. Equatorial Mounting a telescope mounting that has two axes of rotation. One axis is directed toward the celestial pole and forms with the plane of the horizon an angle equal to the geographic latitude of the point of observation. The second axis is perpendicular to the first and lies in the plane of the celestial equator. The axes permit the telescope to be turned and directed at a point of the sky with specified coordinates (hour angle and declination). To compensate for the diurnal motion of the stars, the telescope is turned by a clock mechanism around the polar axis at a rate of one revolution per sidereal day. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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