gravitasjonsbølge betyr engelsk

gravitational wave [gravitational waves]▼(fluctuation in spacetime that propagates as a wave at the speed of light)
noun
[UK: ˌɡræ.vɪ.ˈteɪʃ.n̩əl weɪv] [US: ˌɡræ.və.ˈteɪʃ.n̩əl ˈweɪv]