9 julio 2015
What looks like a shooting target is actually an image of nested rings of X-ray light centered on an erupting black hole. On June 15, NASA’s Swift satellite detected the start of a new outburst from V404 Cygni, where a black hole and a sun-like star orbit each other. Since then, astronomers around the world have been monitoring the ongoing light show.
http://feeds.sciencedaily.com/~r/sciencedaily/~3/6QsrovTkfmU/150709180210.htm
