NASA satellite captures first view of 'night-shining' clouds

A NASA satellite has captured the first occurrence this summer of mysterious iridescent polar clouds that form 50 miles above Earth's surface.

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<p><a href="http://www.physorg.com/news102331465.html">NASA satellite captures first view of 'night-shining' clouds</a></p> <p>A NASA satellite has captured the first occurrence this summer of mysterious iridescent polar clouds that form 50 miles above Earth's surface.</p>