Electric-blue night clouds are invading the U.S.

Reposted from Dr. Roy Spencer’s Blog I have personally cussed out Dr. Spencer for adding an item to my bucket list which had been almost complete.~ctm June 11th, 2019 by Roy W. Spencer, Ph. D. Over the next few weeks, mid-latitude observers might experience the best noctilucent cloud viewing of their lifetimes. Extremely high-altitude noctilucent…

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NASA takes AIM on noctilucent clouds

From AIM. High up in the sky near the poles some 50 miles above the ground, silvery blue clouds sometimes appear, shining brightly in the night. First noticed in 1885, these clouds are known as noctilucent, or “night shining,” clouds. Their discovery spawned over a century of research into what conditions causes them to form…