Definition of cosmic noise
: unidentified celestial radio-frequency radiation
especially
: such radiation originating from outside the Milky Way
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“Cosmic noise.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cosmic%20noise. Accessed 19 Jun. 2021.
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The first known use of cosmic noise was in 1947
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