Black holes twist spacetime #shorts

Black holes don’t just curve space, they twist it too - dragging it along as they spin. So according to Einstein’s theory of general relativity we can describe gravity mathematically as massive objects curving space itself. And in 1918, two Austrian physicists, Josef Lense and Hans Thirring, were using Einstein’s equations to work out the gravity around a spinning object and realised that curved space gets dragged along by the spinning object. The object doesn’t just curve the space, it adds s