Cosmic explosion last year may be 'brightest ever seen' | As

Astronomers say gamma-ray burst may have been result of star collapsing to form black hole

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Netherlands , Dan Perley , Andrew Levan , European Space Agency , Radboud University In Nijmegen , University Liverpool Telescope , Astrophysics Research Institute , Liverpool John Moores University , Liverpool Telescope , Radboud University , Astrophysical Journal ,