High latitudes of the Earth's upper atmosphere in the luminous phenomenon is the solar wind interaction with the Earth's magnetic field results. Scientists are of the view that: The electric solar wind particles collision with the Earth's magnetic field, guided by the Earth's magnetic field, the flow of the magnetic South Pole and the magnetic North Pole, from the ground in about 80 ~ 120 kilometers around, and the atmosphere of the gas molecules (especially nitrogen and oxygen) in collision of these air molecules are excited and luminous.
Aurora gorgeous, absolutely wonderful. This is because in the upper atmosphere contains different elements of the gas, which after the collision by the light. Usually the most common to see the Northern Lights is the green and yellow is the result of the section with energy particle collisions from the ground only 40 miles generated by oxygen molecules; when nitrogen molecules by particle collisions, will issue a red light; ionizing of nitrogen will issue a Blu-ray; and nitrogen and will issue a red light. Therefore, people can see red, blue, green, purple and white light covered the sky.
The emergence of Aurora need to have two conditions, first, the temperature must be low, and the other is better weather.
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