#In a first, astronomers watch a black hole’s corona disappear, then reappear
“#In a first, astronomers watch a black hole’s corona disappear, then reappear” This diagram shows how a shifting feature, called a corona, can create a flare of X-rays around a black hole. The corona (feature represented in purplish colors) gathers inward (left), becoming brighter, before shooting away from the black hole (middle and right). Astronomers…