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Discoveries from
NASA's Polar Spacecraft
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COASTLINE HUGGING AURORAS
Humans are not alone in showing a preference for coastlines. New
observations suggest that auroras--those brilliant curtains of light seen in the
night sky of the polar regions--may also favor Earth's coastlines on occasion. A
camera designed to image the Earth's aurora from NASA's Polar spacecraft has provided
strong evidence that coastlines do sometimes influence the spatial distribution of
these colorful, shimmering lights. The photographs produced by Polar's state-of-the-art
camera shows auroral arcs sometimes following coastlines for hundreds of miles. At
other times, the coastlines appear to deflect or dim the auroral arc. No theory can
presently account for the formation of such coastline auroras...
(full story)
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