A Black Hole ‘Double Burps’

Supermassive black holes reside at the center of most, if not all, massive (and possibly low-mass) galaxies. They range in size from millions to billions of solar masses, and they can eat voraciously or not at all, depending on their surroundings. But one thing is clear: Black holes don’t have very good table manners, as a team led by researchers at the University of Colorado Boulder confirmed last week at the 231st Meeting of the American Astronomical Society in Washington, D.C.

The team

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