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.
Atlas V Arc of Light: Rocket launched with twin Radiation Belt Storm Probes sent to explore the Van Allen Belts that surround Earth. Astrophotographer Mike Killian took this photo from Cape Canaveral Air Force Station in Florida Aug.
is one of the most complex galaxy clusters known, located about billion light years from Earth. The Hubble data is colored in cyan and yellow, with the Chandra data in blue and violet. Happy Birthday, Hubble: Seeing the Universe in a New Light