Monster black hole spews energy as regularly as Yellowstone’s ‘Old Faithful’

At the heart of a galaxy more than 570 million light-years away, energy flares into space so consistently that astrophysicists have dubbed the galaxy Old Faithful, like the famously predictable geyser in Yellowstone National Park. This is the first time such regular and frequent flares have been spotted emanating from a distant galaxy’s core.

About once every 114 days, flares emerge from the center of galaxy ESO 253-3 (the events actually took place nearly 600 million years ago, but scientists are now seeing them for the first time because of how far light from the galaxy has to travel to reach Earth). 

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