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
On top of that, ionizing radiation in space from cosmic rays and other sources poses a unique challenge, degrading the solar panels, the radiative coolers, and the chips themselves.
—
IEEE Spectrum,
11 June 2026
The phenomenon was discussed in the debrief as possibly tied to cosmic rays or heavy particles passing through the eye.
—
Sarah Rumpf-Whitten,
FOXNews.com,
22 May 2026
On Earth, the Large Hadron Collider can smash atoms together and accelerate particles to near light speeds — but in space, there are high-energy cosmic rays with over 10 million times more power than even those zippy particles.
—
Robert Lea,
Space.com,
13 May 2026
Not all involve capes or cosmic rays.
—
Gabrielle Principe,
The Conversation,
5 May 2026
See All Example Sentences for cosmic ray
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IEEE Spectrum,
11 June 2026
The phenomenon was discussed in the debrief as possibly tied to cosmic rays or heavy particles passing through the eye.
—
Sarah Rumpf-Whitten,
FOXNews.com,
22 May 2026
On Earth, the Large Hadron Collider can smash atoms together and accelerate particles to near light speeds — but in space, there are high-energy cosmic rays with over 10 million times more power than even those zippy particles.
—
Robert Lea,
Space.com,
13 May 2026
Not all involve capes or cosmic rays.
—
Gabrielle Principe,
The Conversation,
5 May 2026
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 26 Jun. 2026.
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