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Supermassive Diet: Black Holes Bulk-Up on Dark Matter : DNews — news.discovery.com

It has long been assumed that the size of a supermassive black hole in a galaxy’s core is intimately related to the number of stars that galaxy contains — but it might not be that simple after all. VIDEO: What if the Big Bang Never Happened? Every galaxy is cocooned inside a massive halo of dark matter, the invisible stuff that is thought to account for nearly 85 percent of all matter in the universe. The bigger the galaxy, the bigger the dark matter halo. The stars that we observe in any given galaxy accounts for a tiny fraction of the total mass of that galaxy — the halo can extend for hundreds of thousands of light years from the visible galaxy’s ‘edge.’

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