NASA missions help investigate an ‘Old Faithful’ active galaxy

NASA missions help investigate an ‘Old Faithful’ active galaxy
During a typical year, over a million people visit Yellowstone National Park, where the Old Faithful geyser regularly blasts a jet of boiling water high in the air. Now, an international team of astronomers has discovered a cosmic equivalent, a distant galaxy that erupts roughly every 114 days.
phys.org
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