When Black Holes Collide (2006)
American astronomers have captured a pair of supermassive black holes poised to
undergo an extreme collision. The black holes lurk at the centre of a cluster of
galaxies, Abel 400. At the moment the two black holes in Abel 400 are widely
separated, each surrounded by a vast accretion disc of gas and dust. For this
picture, though, I imagined the scenario in several billion years, when the holes
reside in a single disk and are about to collide.
