Brian Greene (Cosmic String Theory) and Astrophysicist Ethan Siegel have collaborated on a National Geographic coffee-table ...

New images show the rapidly rotating pulsar of the "Guitar Nebula" shooting out a gigantic cosmic plume of plasma, X-rays and ...

At a singularity, the laws of physics as we know them suffer a complete breakdown. So such objects really shouldn’t exist.

"Why do they have the same rotation? They must have a connection with each other — that would be a very strong question that ...