A Black Hole ‘Choir’ Posted on July 28, 2016 by Frank Cisco The blue dots in this field of galaxies, known as the COSMOS field, show galaxies that contain supermassive black holes emitting high-energy X-rays. via NASA http://ift.tt/2aB7Ifz Share this: Share on X (Opens in new window) X Share on Facebook (Opens in new window) Facebook Like Loading... Related