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Astronomers discover 'monster black holes'
Five monster black holes that were previously hidden by dust and gas have been uncovered by astronomers.
The British-led discovery suggests there may be millions more "supermassive" black holes in the universe than were previously thought.
Supermassive black holes are powerful cosmic "drains" sucking material into a point of infinite density formed from the compressed mass of hundreds of thousands to billions of suns.
High energy X-rays emitted from around the newly identified black holes revealed their presence at the centre of five galaxies.
http://www.telegraph.co.uk/news/science/11719914/Astronomers-discover-monster-black-holes.html
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