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Astronomers have discovered the largest known structure in the universe, a clump of active galactic cores that stretch 4 billion light-years from end to end. The structure is a light quasar group (LQG), a collection of extremely luminous Galactic Nulcei powered by supermassive central black holes.

Clump of active galactic cores that stretch 4 billion light-years from end to end. The structure is a light quasar group (LQG), a collection of extremely luminous Galactic Nulcei powered by supermassive central black holes.

Grilled Cheese 5 Ways // #grilledcheese #cheese #sandwich #dinner #lunch #kids #Tasty

Grilled Cheese 5 Ways // #grilledcheese #cheese #sandwich #dinner #lunch #kids #Tasty