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Curiosity Rover Spots Surprisingly Colorful 'Twilight Clouds' on Mars

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NASA ’s Curiosity rover captured a feather-shaped cloud glowing in the Martian sky shortly after sunset on the Red Planet last month .

The clouds are noctilucent (or “night shining”) clouds, caused by the way the Sun 's light scatters in the dusty Martian atmosphere.

NASA researchers published a study in the Geophysical Research Letters describing how the iridescent effect reveals how ice forms and grows in Mars ' atmosphere.

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