32.5 MB (1.7 MB compressed)
5000 x 2269 pixels
42.4 x 19.3 cm ⏐ 16.7 x 7.6 in (300dpi)
ECKHARD SLAWIK / SCIENCE PHOTO LIBRARY ECKHARD SLAWIK / SCIENCE PHOTO LIBRARY
Noctilucent clouds over trees at twilight. Noctilucent clouds are very thin and form high above the Earth at heights of 75-90 kilometres. Because they are so thin and high, they can only be seen at twilight, shining in the glow of the setting Sun, and usually only at high and low latitudes. Photographed during the June solstice (21 June 2019), in Waldenburg, in southern Germany.
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