| 单词 | celestial sphere |
| 释义 | celestial sphereSEE SYNONYMS FOR celestial sphere ON THESAURUS.COM nounthe imaginary spherical shell formed by the sky, usually represented as an infinite sphere, the center of which is a given observer's position. Origin of celestial sphereFirst recorded in 1875–80 Words nearby celestial spherecelestial marriage, celestial mechanics, celestial meridian, celestial navigation, celestial pole, celestial sphere, Celestine I, Celestine II, Celestine III, Celestine IV, Celestine V Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for celestial spherecelestial sphere nounan imaginary sphere of infinitely large radius enclosing the universe so that all celestial bodies appear to be projected onto its surface Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Scientific definitions for celestial spherecelestial sphere An imaginary sphere with Earth at its center. The stars, planets, Sun, Moon, and other celestial bodies appear to be located on this sphere, and the sphere appears to rotate around the Earth's extended axis once every 24 hours, carrying the celestial bodies with it overhead and giving them their diurnal motions. The celestial sphere is essentially a spherical map of the sky that provides the basis for the coordinate systems used in celestial navigation and in specifying the positions and motions of celestial objects. See more at altazimuth coordinate system ecliptic coordinate system equatorial coordinate system. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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