If the Universe is expanding, then why aren’t we?
Ethan Siegel

After big bang the Universe expanding without any brakes, but the miracle happened; structure of galaxies and constellations didn’t change. Then, a lot of warping spacetime becomes black holes. A small warped spacetime (a small black hole) orbits a large of warped spacetime (a large black hole), some of them merger/collide. Spacetime ringing, they make a sound. That’s very interesting story.

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