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P-M Hedén (Clear Skies, TWAN)
Explanation:
Noctilucent or night-shining clouds lie near the edge of space. From about 80
kilometers above Earth's surface, the icy clouds can still reflect sunlight
even though the Sun itself is below the horizon as seen from the ground.
Usually occurring at high latitudes in summer months, the diaphanous
apparitions are also known as polar mesospheric clouds and may be connected to
global change in the lower atmosphere. This impressive 360 degree panorama made
from 34 separate images captures an impressive display of noctilucent clouds
all over the sky. It was recorded last month from Vallentuna, Sweden. The
photographer reports that the display was like a noctilucent cloud storm, one
of the best he's ever witnessed.
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