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The Northern Lights
Transcript of The Northern Lights
I was fascinated by them and I wanted to know more. The Northern Lights is a common name for the Aurora Borealis. They were named after the Ancient Roman Goddess of Dawn, Aurora, and the Greek name for "north wind," Boreas.
The Aurora is a naturally occurring light display in the sky, typically in the arctic regions.
The Aurora occur most often in the Auroral Zone, which is 3-6 degrees in latitude, and 10-20 degrees away from Earth's magnetic pole.
The Northern Lights happen because of the collision of electrically charged particles. The charged particles are created by Earth's solar winds, and are directed into the atmosphere by the magnetic field.
Aurora is classified into two groups: diffuse or discrete aurora. Diffuse Aurora is featureless glow, sometimes invisible to the naked eye. Discrete Aurora are sharply defined, within the diffuse aurora. Sometimes discrete aurora may light up the night sky enough to read a newspaper.
Discrete Aurora are more commonly observed at night, because they're harder to see in the sunlight. The colors in the Northern lights are determined by the elements in them.
Oxygen omits green or brownish-red, depending on the amount of energy the particles contain.
Nitrogen releases either blue or red.
Other colors are pink,(a mixture of green and red) and yellow (a combination of green and red).
Green is the dominant color in all of the aurora. . A lot of the other planets have aurora, all revolving around the planet's magnetic field.
. This phenomenon happens at the south pole too, but it's referred to as the aurora australis. They are visible in Antarctica, New Zealand, and Australia.
. In medieval Europe, the Northern Lights were believed to have been a sign from God. http://en.wikipedia.org/wiki/Aurora_(astronomy)
Hope you enjoyed:)