Aurora Borealis in Alaska

Numéro d’image : 11681481
Aurora Borealis in Alaska
Aurora Borealis sweeps over spruce trees and the Brooks Range mountains in Northern Alaska. The Aurora Borealis (northern lights) is an atmospheric phenomenon that occurs at high latitudes,appearing as shimmering bands of coloured light in the sky. It occurs when charged particles in the solar wind are directed towards the poles by Earth's magnetic field. There they collide with atoms in the upper atmosphere,causing them to emit light. The colour of the light depends on the gas involved. Green is produced by excited atomic oxygen. Photographed near Wiseman,Northern Alaska
Licence : Droits gérés
Crédit: Science Photo Library / Madeley, Chris
Taille de l’image : 5669 px × 3780 px
Model Release : Non requis
Property Release : Non requis
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