Black Holes: Just Two Numbers Is All You Need

Black holes sound wildly complicated. After all, there are all sorts of bizarre things going on: intense gravity, the warping of the fabric of space, the distortion of time itself. But when it comes to describing black holes, it comes down to just two numbers: the mass of the black hole and its spin. credit: Harvard-Smithsonian Center for Astrophysics source: chandra.harvard.edu