Photo Location – Alaska, near Denali National Park in Feb.2014.
The northern lights, or Aurora Borealis is formed when charged particles from a solar wind interact with the earth’s atmosphere. The different colors are created by the various molecules in the atmosphere as they interact with the charged particles. The excited oxygen molecules generate the green color we normally associate with an aurora. While the aurora can be generated at any time of the day, it is most easily seen at night by the human eye. The strongest activity is usually around the equinox in September and March.
The term Aurora Borealis was coined by Galileo in 1619 – Aurora for the Roman goddess of the dawn, and Borealis for the Greek name of the north wind. In the southern hemisphere, the same phenomenon is called the Aurora Australis.
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