Colorful aural lights dance exquisitely across the Pacific Northwest. The light show is a naturally occurring phenomenon at the Earth's poles caused by the interaction of solar wind and the Earth's magnetosphere. (Photo: ESA/NASA)
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Colorful aural lights dance exquisitely across the Pacific Northwest. The light show is a naturally occurring phenomenon at the Earth's poles caused by the interaction of solar wind and the Earth's magnetosphere. (Photo: ESA/NASA)
