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Reference Terms
from Wikipedia, the free encyclopedia

Aurora (astronomy)

The aurora is a glow observed in the night sky, usually in the polar zone.

It is also known as "northern lights" or "aurora borealis," which is Latin for "northern dawn" since in Europe especially, it often appears as a reddish glow on the northern horizon as if the sun were rising from an unusual direction.

Note:   The above text is excerpted from the Wikipedia article "Aurora (astronomy)", which has been released under the GNU Free Documentation License.
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October 27, 2016

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updated 12:56 pm ET