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
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It will also be shielded by steel and plastic to block out as much cosmic ray interference as possible.
—
Chris Young, Interesting Engineering, 13 Oct. 2025
Mapping the heliosphere The heliosphere was first theorized by multiple scientists investigating the concept of cosmic rays and the solar wind in the late 1950s, according to NASA.
—Ashley Strickland, CNN Money, 24 Sep. 2025
Its few dozen inhabitants study climate, sea ice, cosmic rays, meteorology, glaciology and biodiversity.
—Jamie Carter, Space.com, 23 Sep. 2025
These particles, known as cosmic rays, are mostly composed of single protons, although heavier atomic nuclei, electrons, positrons (the antimatter counterpart of electrons), and neutrinos are all present as well.
—Ethan Siegel, Big Think, 4 Sep. 2025
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Chris Young, Interesting Engineering, 13 Oct. 2025
Mapping the heliosphere The heliosphere was first theorized by multiple scientists investigating the concept of cosmic rays and the solar wind in the late 1950s, according to NASA.
—Ashley Strickland, CNN Money, 24 Sep. 2025
Its few dozen inhabitants study climate, sea ice, cosmic rays, meteorology, glaciology and biodiversity.
—Jamie Carter, Space.com, 23 Sep. 2025
These particles, known as cosmic rays, are mostly composed of single protons, although heavier atomic nuclei, electrons, positrons (the antimatter counterpart of electrons), and neutrinos are all present as well.
—Ethan Siegel, Big Think, 4 Sep. 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 16 Oct. 2025.
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