Is the supermassive black hole at the heart of the Milky Way (SagA*) spinning? And how fast? It's tricky to know how fast a black hole is spinning without an accretion disk, but astronomers can estimate using polar outflows of material streaming from the black hole. Researchers observed the region around SagA* with the Chandra X-Ray Observatory and estimated that it is spinning. In fact, it's spinning as quickly as the laws of physics will permit.