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Loading contentThe technique behind the ground-based detectors: a laser beam is split down two perpendicular kilometre-scale arms and recombined, and a passing gravitational wave stretches one arm and squeezes the other by a fraction of a proton's width, shifting the interference pattern. LIGO, Virgo, and KAGRA all work this way.
Facts on this topic will be cited from these primary and reference sources.
Direct detections of gravitational waves from compact-object mergers.