NASA'S Fermi Spots 'Superflares' In The Crab Nebula

The Crab Nebula

WASHINGTON -- The famous Crab Nebula supernova remnant has erupted in an enormous flare five times more powerful than any flare previously seen from the object. On April 12, NASA's Fermi Gamma-ray Space Telescope first detected the outburst, which lasted six days.


NASA

Wikipedia about the Crab Nebula:
http://en.wikipedia.org/wiki/Crab_Nebula