Ring of Fire: Northern Lights from space An oval of glowing green light in Earth’s upper atmosphere encircles the magnetic North Pole. NASA Credit: NASA You Might Also Like: What Would Happen If A Large Asteroid Were To Smash Into Earth
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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.