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Inflow, Outflow Cycle of Gas Near Black Hole
Artist impression of Abell 2597 showing the central supermassive black hole expelling cold, molecular gas -- like the pump of a giant galactic fountain. Recent data suggests that the expelled gas will eventually fall back towards the black hole, restarting the cycle.
Neither a hole nor really black, a stellar black hole is actually the superdense remains of a very big star that imploded, violently collapsing in on itself, during a supernova.
