noun
cosmic radio waves
Technical term used in astronomy and space science.
宇宙電波を観測するために、大型の電波望遠鏡が使われる。
Large radio telescopes are used to observe cosmic radio waves.
General term for radio waves; 宇宙電波 specifically refers to radio waves originating from outer space.
Compound of 宇宙 (uchū, 'universe, space') and 電波 (denpa, 'radio waves').