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In 1990, as Voyager 1 was leaving the solar system, Sagan fought a long internal battle at NASA to turn the cameras around one last time to photograph Earth. Many engineers opposed it, fearing it might damage the cameras or waste time.
But Sagan’s successful effort resulted in the "Pale Blue Dot" image. He used this tiny, 0.12-pixel speck of Earth to write his famous reflection on how "every human being who ever was" lived on that "mote of dust suspended in a sunbeam".


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