4 Surprising Facts About the Universe We Just Discovered in a Cosmic Breakthrough

News from space always arrives late — and in a discovery announced Monday, that meant 130 million years late.

It was that long ago that two neutron stars in Galaxy NGC 4993, in the Hydra constellation, spiraled in toward one another and collided in a titanic eruption, sending out waves of energy that literally shook our world. The shaking happened on Aug. 17 at 8:41 a.m. E.T.