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Astronomy Picture of Day: Iridescent Clouds
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Astronomy Picture of Day: Iridescent Clouds# Astronomy - 天文
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Iridescent Clouds
Credit & Copyright: Arne Danielsen
Explanation: Why would clouds appear to be different colors? A relatively rare phenomenon
known as iridescent clouds can show unusual colors vividly or a whole spectrum of colors
simultaneously. These clouds are formed of small water droplets of nearly uniform size.
When the Sun is in the right position and mostly hidden by thick clouds, these thinner clouds
significantly diffract sunlight in a nearly coherent manner, with d
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