Definition of galactic noise in English:

galactic noise

Syllabification: ga·lac·tic noise

noun

Unidentified radio-frequency radiation coming from beyond the solar system.
More example sentences
  • And the Voyager signals are directed towards Earth using microwave frequencies where galactic noise is relatively low, and antenna gain is high.
  • Fortunately, however, the man-made and galactic noise abate even more quickly.
  • So-called galactic noise is radio noise from outside the solar system.

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Word of the day apposite
Pronunciation: ˈapəzit
adjective
apt in the circumstances or relation to something