Noctilucent
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Born of Meteor Dust, Unusual Clouds Appear in the Night Sky
Martin Koitmäe via Flickr Nautilus Members enjoy an ad-free experience. Log in or Join now . If you look to the darkening sky after the end of a long summer day, you might see tendril-like clouds with a blueish tinge that hang at the edge of space. They appear when conditions are right, generally at […]