Aurora Borealis Photographed From Alaska
by Science Photo Library
Title
Aurora Borealis Photographed From Alaska
Artist
Science Photo Library
Medium
Photograph - Photograph
Description
Aurora borealis, the Northern Lights, photographed near Fairbanks, Alaska. Auroras are luminous displays that appear in the night sky at high latitudes; they form rays, bands, arcs, streamers & curtains, often coloured blue, red or green. They are caused by electrically charged subatomic particles from the Sun interacting with atoms & molecules in Earth's upper atmosphere (above about 100 km). The reason that they appear at high latitudes is that the particles from the Sun are concentrated over the poles by Earth's magnetic field.
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September 12th, 2018
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