Scientists Know Why Uranus Is So Pale
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Uranus is hazy. Those extra particles dull the scattered light and make it look lighter blue than Neptune. Scientists have long wondered why the two planets are different colors. After all, they are of similar size, mass, and composition. They even spin at a similar rate, though in opposite directions. A new simulation shows that it snows more on Neptune, which clears out the atmosphere and makes it look a darker blue.
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Bleach.