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Rare northern lights captured in UK

Aurora borealis photographed at Embleton Bay, Northumberland, UK

The aurora borealis, or northern lights, come in a variety of colors depending on altitude and the behavior of the photons in the Earth's upper atmosphere: At high altitude oxygen red dominates, then oxygen green and nitrogen blue/red, then finally nitrogen blue/red when collisions prevent oxygen from emitting anything. Green is the most common of all auroras. Behind it is … [Read more...]

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