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NLCs Around South Pole Diminished in 2011
Comparison of Noctilucent Clouds (NLCs) at Earth's South Pole for 2010 and 2011 show diminished amount of clouds in 2011. The reason for this is unknown at present. Credit: NASA/AIM
Comparison of Noctilucent Clouds (NLCs) at Earth's South Pole for 2010 and 2011 show diminished amount of clouds in 2011. The reason for this is unknown at present. Credit: NASA/AIM