The northern lights or northern lights as many call it is a rare event that happens on Planet Earth in late Autumn, only at the North and South poles of our Planet.
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Many people wonder why this phenomenon, What exactly happens? and where the beautiful colors that the sky emits come from.
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The answer is the following, this phenomenon is exclusive of the atmospheric interaction with the solar rays that hit the magnetic field of the Earth, sending electrons charged with energy towards the poles, both North and South, causing the emergence of the plasma, the which we know as auroras. These can be observed at certain times of the year, between the months of September and October.
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They are called Aurora Borealis, when they occur at the North Pole and Australasian auroras when they occur at the South Pole. Their colors derive in function of the chemical composition of the gases that predominate at different heights, generating colors such as red, blue, green, purple and yellow.

Colors:
Green and yellow
When the Oxygen is at a height of 100 Km
Red
When the oxygen is 320 km high.
Purple and Blue

When nitrogen predominates

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Countries fortunate in being able to appreciate Northern and Northern auroras.
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Borealis (North Pole)
1) Downtown Alaska
2) Northern Canada
3) North Greenland
4) North of Iceland
5) North of Siberia

Australes (South Pole)
1) Southern Australia.
2) Antarctica