| 单词 | radio astronomy |
| 释义 | radio astronomynounthe branch of astronomy that utilizes extraterrestrial radiation in radio wavelengths rather than visible light for the study of the universe. Origin of radio astronomyFirst recorded in 1945–50 Words nearby radio astronomyradioactive series, radioactive tracer, radioactive waste, radioactivity, radioallergosorbent test, radio astronomy, radioautograph, radioautography, radio beacon, radio beam, radiobicipital Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for radio astronomyradio astronomy nouna branch of astronomy in which a radio telescope is used to detect and analyse radio signals received on earth from radio sources in space 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 radio astronomyradio astronomy The study of celestial objects by measurement of the radio waves they emit. Radio astronomy has enabled the detection and study of objects such as pulsars, quasars, radio galaxies, and other objects, some of which emit considerably less radiation at other wavelengths. Radio astronomy has contributed to the discovery of cosmic background radiation and has enhanced the understanding of solar activity and the structure of galaxies. See also radio telescope. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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