Noctilucent or night-shining clouds lie near the
From about 80 kilometers above Earth's surface,
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
are also known as
polar mesospheric clouds and may be
connected to global change
in the lower atmosphere.
This serene view features a lovely display of noctilucent clouds
over water recorded last month near the coastal town of Vaxholm, Sweden.
The picture was taken near local midnight.
P-M Hedén (Clear Skies,