Auroras are natural different colored light displays, which are usually observed in the night sky, particularly in the polar zone. Auroras are produced by solar wind (rarefied flow of hot plasma emitted by the sun) that flowing past the earth and collided with earth magnetosphere (part of atmosphere that contain magnetic field). This magnetic "curtains" have different colors depend on it's molecules. Green and red aurora consists of oxygen molecules, when blues aurora consist of nitrogen molecules. This phenomenon commonly occured in the Poles and occasionally occured in other latitudes, as a result of great geomagnetic storm.
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