"It Just Appeared Out of Nowhere" --Colossal Explosion 200 Light Years from Earth 100 Times Brighter than a Supernova

"I've never seen anything like this before in the local universe," said astrophysicist Stephen Smartt, part of the ATLAS team at the Keck Observatory in Mauna Kea, Hawaii. Astronomers with More than a dozen telescopes from all over the world...