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.
Peering into a gateway opened 50 years ago, Maarten Schmidt's March 1963 discovery of the quasar, a cosmic beacon from matter plunging into a black hole, gave astronomers a glimpse into the early universe.
Galaxy Aarp 273 - Arp 273 is a group of interacting galaxies, lying 300 million light years away in the constellation Andromeda. It was first described in the Atlas of Peculiar Galaxies, compiled by Halton Arp in
The most significant scientific discovery of the decade has just been announced: Einstein’s gravitational wave theory proven by the sound of two black holes colliding.It took scientists from 16 countries, 2 miles-long tubes and