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cosmic background radiation
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cosmic background radiation
noun Astronomy.
electromagnetic radiation coming from every direction in the universe, considered the remnant of the big bang and corresponding to the black-body radiation of 3 K, the temperature to which the universe has cooled.
Also called cosmic microwave background.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source
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Cosmic background radiation
is always a great word to know.
So is atmosphere. Does it mean:
| the gaseous envelope surrounding a heavenly body |
| a number of heavenly bodies associated and acting together according to certain natural laws |
Dictionary.com's 21st Century Lexicon
| Main Entry: | cosmic background radiation |
| Part of Speech: | n |
| Definition: | microwave radiation in the universe, produced during the Big Bang and subsequently thinned and cooled as the universe expanded; also called background radiation |
| Usage: | science |
American Heritage
Science Dictionary
| cosmic background radiation
Weak radio-frequency radiation traveling through outer space with equal intensity in every direction. It is thought to be residual radiation from a period shortly following the big bang, when the universe was very hot. Also called microwave background. |
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Word Dynamo Rating For Cosmic background radiati
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