Hungry black hole 'switches on' as astronomers watch in surprise

Astronomers have witnessed one of the most dramatic "switching on" events ever seen as a distant supermassive black hole began greedily feasting on its surrounding matter.

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Belfast ,United Kingdom ,Chile ,Paul Kuin ,Matt Nicholl ,University Of Belfast ,National Astronomy Meeting ,Hubble Space Telescope ,Very Large Telescope ,Atacama Desert ,Mullard Space Science Laboratory ,University College London ,