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celestial horizon |
Also found in: Dictionary/thesaurus, Wikipedia, Hutchinson | 0.12 sec. |
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celestial horizon, one axis of the altazimuth coordinate system altazimuth coordinate system (ăltăz`əməth) or horizon coordinate system, ..... Click the link for more information. . It is the great circle on the celestial sphere midway between the observer's zenith and nadir; it divides the celestial sphere into two equal hemispheres. The observer may be unable to see all the stars that lie above his celestial horizon because of obstructions such as buildings, trees, or mountains; he may be able to see some stars that lie below his celestial horizon because of atmospheric refraction. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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In addition, the club publishes the Celestial Horizons newsletter, posts a Web site, loans telescopes to members and hosts meetings, children's activities and even a booth at the Ventura County Fair, Seck said. |
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