For a long time, we knew only the planets in our cosmic backyard. Today, we know thousands of other worlds are orbiting distant stars.
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About National Geographic: National Geographic is the world's premium destination for critically acclaimed storytelling around science and exploration. Discover amazing wildlife, ancient civilizations, hidden worlds, and the incredible wonders of our Earth. Through world-class scientists, photographers, journalists, and filmmakers, Nat Geo inspires fans of all ages to connect with, explore, and care about the world.
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