Submission + - Where does cosmic rotation come from?
StartsWithABang writes: From the smallest scales to the largest, everything in the Universe spins and revolves. This is a good thing for galaxies and solar systems, otherwise there would be no such thing as planets or stars, as everything would simply collapse down into static, catastrophically massive-and-dense objects. But the Universe — as far as we can tell — wasn't born with any intrinsic angular momentum. And yet, everything rotates and revolves! Where did this cosmic rotation come from? From gravitation, the inevitable physics of torques, and the conservation of angular momentum.