The Expedition 24 crew on the International Space Station captured a unique shot of some multi-layer, multi color clouds over Greece. Polar mesospheric, or noctilucent ("night shining"), clouds usually are seen at twilight, following the setting of the sun below the horizon and darkening of Earth's surface, but in this instance they could be seen at sunrise.
NASA has plenty of explanation with the picture, but I still found it a bit confusing. The picture is nice, though. There is lots more to see on the NASA website, and you can submit your email to receive the Image of the Day.
NASA Image
Friday, September 03, 2010
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