Hundreds of comparatively small black holes could also be circling the supermassive black holes that lurk on the centres of galaxies. The concept wouldn’t solely assist clarify how small black holes develop bigger, it might additionally give us a brand new understanding of why supermassive black holes seem so brilliant.

The centres of galaxies are terribly dense, so matter – together with comparatively small, or stellar-mass, black holes – tends to build up there. A few of this matter falls in direction of every galaxy’s central supermassive…