Physicists have firmed up a theoretical limit on the mass of a black hole by figuring out when it will disrupt the disc that feeds it.
PKS 1302-102 is one of the few known quasars with a pair of black holes within its accretion disc. It is also a curious case for astronomers as it will produce a powerful explosion when these two black holes merge. The scientists trying to determine the scale of this merger estimate that it could result in an enormous release of energy.
Astronomers capture an image of the continuing eruption of the most powerful explosion since the big bang.
