Supermassive black holes sometimes go on feeding frenzies—here's how they know it's time for dinner


a drawing of a black hole
Space

They’re called “supermassive” for a reason.

About 10 percent of all supermassive black holes we can observe seem to be, at any given time, actively accreting matter—feeding on cosmic gas from their surroundings.
via Popular Science "http://bit.ly/2CCLWWF"

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