The imagined view from Planet Nine back toward the sun. Astronomers think the huge, distant planet is likely gaseous, similar to Uranus and Neptune. Caltech/R. Hurt (IPAC) hide caption

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Scientists Find Hints Of A Giant, Hidden Planet In Our Solar System

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Physicists put diamonds at the center of this massive laser, to see what would happen. Matt Swisher/Matt Swisher/LLNL hide caption

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Physicists Crush Diamonds With Giant Laser

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Neptune's Day Is Shorter Than Was Thought

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