Clump of active galactic cores that stretch 4 billion light-years from end to end. The structure is a light quasar group (LQG), a collection of extremely luminous Galactic Nulcei powered by supermassive central black holes.
In August of 2007 astronomers located a gigantic hole in the universe. This empty space, stretching nearly a billion light-years across, is devoid of any matter. A radical and controversial theory proposes that it is a "Universe-in-mass Black hole"
Major black hole discovery shines new light on how the universe formed
Major Black Hole Discovery Shines New Light on How the Universe Formed | NBC News
January 05 2017 : Abell 3411 and Abell Astronomers Discover Powerful Cosmic Double Whammy Astronomers have discovered what happens when the eruption from a supermassive black hole is swept up by the collision and merger of two galaxy clusters.