| 单词 | ptolemaic system |
| 释义 | Ptolemaic systemnoun Astronomy.a system elaborated by Ptolemy and subsequently modified by others, according to which the earth was the fixed center of the universe, with the heavenly bodies moving about it. Origin of Ptolemaic systemFirst recorded in 1765–75 Words nearby Ptolemaic systemPTN, PTO, ptochocracy, Ptolemaeus, Ptolemaic, Ptolemaic system, Ptolemaic universe, Ptolemaist, Ptolemy, Ptolemy I, Ptolemy II Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for Ptolemaic systemPtolemaic system nounthe theory of planetary motion developed by Ptolemy from the hypotheses of earlier philosophers, stating that the earth lay at the centre of the universe with the sun, the moon, and the known planets revolving around it in complicated orbits. Beyond the largest of these orbits lay a sphere of fixed starsSee also epicycle (def. 1) Compare Copernican system 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 Ptolemaic systemPtolemaic system [ tŏl′ə-mā′ĭk ] The astronomical system of Ptolemy, in which Earth is at the center of the universe and all celestial bodies revolve around it. The Sun, Moon, and planets revolve at different levels in circular orbits, and the stars lie in fixed locations on a sphere that revolves beyond these orbits. See more at epicycle. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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