Enormous Black Hole Discovered in Perseus Constellation

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http://www.universetoday.com/98678/oddball-galaxy-contains-the-biggest-black-hole-yet/

Size comparison of the black hole, which is as massive as 17 billion Suns, to Neptune's orbit:
 
What's pictured is really just the event horizon. It has nothing to do with the 'size' of the black hole. The event horizon is the gravitational influence where the escape velocity is = to the speed of light! The actual size of the 'matter' making up the black hole could be a lot smaller!
 
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