cosmic ray
noun
: a stream of atomic nuclei of extremely penetrating character that enter the earth's atmosphere from outer space at speeds approaching that of light
Examples of cosmic ray in a Sentence
Recent Examples on the Web
There, the minerals were protected from incoming cosmic rays that would have otherwise changed their chemical makeup over time.
—
Nell Greenfieldboyce, NPR, 27 May 2025
Radiation exposure results from galactic cosmic rays and solar particle events.
—Eileen Falkenberg-Hull, MSNBC Newsweek, 27 May 2025
Carbon 14 is produced by interactions of nitrogen atoms in the atmosphere with cosmic rays.
—Tereza Pultarova, Space.com, 19 May 2025
This is the study of the Sun and the effects of solar activity, including cosmic rays and space weather, on Earth and other planets.
—Eric Berger, ArsTechnica, 23 Apr. 2025
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Nell Greenfieldboyce, NPR, 27 May 2025
Radiation exposure results from galactic cosmic rays and solar particle events.
—Eileen Falkenberg-Hull, MSNBC Newsweek, 27 May 2025
Carbon 14 is produced by interactions of nitrogen atoms in the atmosphere with cosmic rays.
—Tereza Pultarova, Space.com, 19 May 2025
This is the study of the Sun and the effects of solar activity, including cosmic rays and space weather, on Earth and other planets.
—Eric Berger, ArsTechnica, 23 Apr. 2025
See All Example Sentences for cosmic ray
Cite this Entry
“Cosmic ray.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cosmic%20ray. Accessed 4 Jun. 2025.
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