A team of astronomers led by Dr Alex Markowitz from the University of California, San Diego and the Karl Remeis Observatory in Bamberg, Germany, has discovered giant clouds of gas circling supermassive black holes at the centers of galaxies. This is an artist’s concept of a supermassive black hole at the centre of a galaxy. Image credit: NASA / JPL / Caltech. Once thought to be a relatively uniform, fog-like ring, the accreting matter instead...
