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The aurora borealis glows directly overhead in the sky above Kenai, Alaska.

The northern lights in blue tones. Interesting colors for the aurora borealis.

from the Guardian

Astronomy Photographer of the Year 2012 nominations – in pictures

The aurora borealis over Høgtuva Mountain in Norway. The Earth's magnetic field funnels particles from the solar wind over the polar regions. More than 80 kilometres above the ground, these collide with molecules in the atmosphere causing them to glow: green and pale red for oxygen and crimson for nitrogen Photograph: Tommy Eliassen/Royal Observatory

from The Telegraph

Environment

The northern lights in the UK

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