Gravitational Waves Leave an Eternal Imprint ⚡ экспресс
Original: "Constraining Gravitational Wave Memory with Hierarchical Inference"
To spot how gravitational waves forever change space, we'll need to rack up close to 2000 signals from black hole mergers.
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When black holes merge, the space around them doesn't just wobble—it changes forever. After a gravitational wave passes, objects remain slightly shifted, like a footprint in the sand. Scientists tested this 'memory effect' on a hundred mergers and showed that for confident detection, about 2000 events are needed.
🎯 From a single black hole merger, the memory effect would change the distance between Earth and the Sun by less than the diameter of a proton.