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cosmic radiation

   Also found in: Medical, Encyclopedia, Wikipedia, Hutchinson 0.01 sec.
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.cosmic radiation - radiation coming from outside the solar system
CBR, CMB, CMBR, cosmic background radiation, cosmic microwave background, cosmic microwave background radiation - (cosmology) the cooled remnant of the hot big bang that fills the entire universe and can be observed today with an average temperature of about 2.725 kelvin
cosmic ray - highly penetrating ionizing radiation of extraterrestrial origin; consisting chiefly of protons and alpha particles; collision with atmospheric particles results in rays and particles of many kinds
radiation - energy that is radiated or transmitted in the form of rays or waves or particles


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The National Council on Radiation Protection and Measurements (NCRP) has used the ICRP risk-based methodology to determine that radon gas accounts for two-thirds of the total natural background radiation dose based on a comparison of equivalent whole-body doses from radon and from cosmic radiation and terrestrial radionuclides (NCRP 1987).
Restructuring nuclear regulations. (Commentaries) by Mossman, Kenneth L. / Environmental Health Perspectives
While zooming about at 40,000 feet we're exposed to 200 times more cosmic radiation than at ground level.
Unfriendly skies: flying may be hazardous to your health--in more ... by Glickman, Marshall / E
Fabian of the University of Cambridge in England estimates the contribution of black holes to cosmic radiation based on the average density of supermassive black holes near our galaxy and the intensity of the sky's X-ray background.
Massive black holes let there be light by Cowen, R. / Science News
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