NASA animated AIM observations of the night-shining clouds to mark the occasion. 
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NASA animated AIM observations of the night-shining clouds to mark the occasion. Learn more about your ad choices. Visit megaphone.fm/adchoices

NASA animated AIM observations of the night-shining clouds to mark the occasion.&nbsp;
Learn more about your ad choices. Visit megaphone.fm/adchoices

Notilucent cloud season just started in the Arctic

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