"Old Faithful" Cosmic Eruption Shows Black Hole Ripping at Star

M. Kornmesser/ESO via AP

You’ve heard of Old Faithful, the Yellowstone National Park geyser that erupts every hour or two, a geological phenomenon on a nearly predictable schedule.

Now, an international group of scientists who study space have discovered an astronomical “Old Faithful” – an eruption of light flashing about once every 114 days on a nearly predictable schedule.

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