An international team has observed the light echo of an enormous X-ray flare, which was apparently produced when a single star was disrupted by a super-massive black hole. The importance of this observation is that it offers researchers a new ...

Many galaxies have super-massive black holes at their core, which expel powerful jets of particles at nearly the speed of light. Using the National Radio Astronomy Observatory’s very long baseline array, scientists recently confirmed the leading theory, according to which ...