Noctilucent cloud shining at twilight. These are extremely high altitude clouds that reflect the Sun's light after it has set below the horizon. It is thought that they are composed of water ice,although the mechanism of their formation remains unclear. Photographed from London,UK | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Sauze, Francoise |
Taille de l’image : | 3321 px × 4954 px |
Model Release : | Non requis |
Property Release : | Non requis |
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