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A comment on Rumours swell over new kind of gravitational-wave sighting. Parent comment

Re:Rumours swell over new kind of gravitational-wave sighting by 4ad on Saturday August 26, 2017 @01:37PM (#15106446)
All massless particles like photons and gravitons travel at the same speed, the speed of light. Yes, gravitational waves travel at the speed of light, and yes, of course they are affected by doppler shift.
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