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Earth’s Highest Clouds Shine at the “Top of the Orbit”

20 Aug , 2013 by

Looking for a new desktop background? This might do nicely: a photo of noctilucent “night-shining” clouds seen above a midnight Sun over Alaska, taken from the ISS as it passed over the Aleutian Islands just after midnight local time on Sunday, August 4. When this photo was taken Space Station was at the “top of the […]

An Early Start for Noctilucent Clouds

10 Jun , 2013 by

The season for noctilucent “night-shining” clouds is arriving in the northern hemisphere, when wispy, glowing tendrils of high-altitude ice crystals may be seen around the upper latitudes, shining long after the Sun has set. Found about 83 km (51 miles) up, noctilucent clouds (also called polar mesospheric clouds) are the highest cloud formations in the […]

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