Foto de stock - Aurora Borealis Northern Polar Lights over the boreal forest outside Yellowknife, Northwest Territories, Canada, MORE INFO The term aurora borealis was coined by Pierre Gassendi in 1621 from the Roman goddess of dawn, Aurora, and the Greek name for north wind, Boreas Auroras are the result of the emissions of photons in the Earth´s upper atmosphere, above 80 km 50 miles, from ionized nitrogen atoms regaining an electron, and oxygen and nitrogen atoms returning from an excited state to ground state

Imagen: Aurora Borealis Northern Polar Lights over the boreal forest outside Yellowknife, Northwest Territories, Canada, MORE INFO The term aurora borealis was coined.

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