A polar aurora, also called "aurora borealis" in the northern hemisphere and "aurora australis"
An aurora borealis is a luminous phenomenon that occurs when particles of the solar wind, charged with electrons and protons, collide with gases in the Earth's upper atmosphere.
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nothernlightauroraborealiswintercoldnightphotographylonguexposurenorwayelectronsolarwindnightpicture
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