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@ ch0k1
2025-03-12 02:06:43
Scientists Think Light May Hold the Memory of Ancient Cataclysms
https://www.popularmechanics.com/space/deep-space/a64088911/gravitational-memory/
If two black holes crashed into each other billions of years ago, even though we weren’t around to observe, could we find out?
Well, as it turns out, maybe we could. Einstein’s theory of general relativity describe how the gravity of massive objects and extreme phenomena—such as black hole mergers and core-collapse supernovae (which sometimes end up as black holes)—causes ripples that permanently warp spacetime and traverse the void at the speed of light. These ripples are known as gravitational waves, and the effects of these waves thought to be permanently imprinted on their surroundings as “gravitational memory.”
originally posted at https://stacker.news/items/910979