Aurora

Aurora is a colored ray of light that is above the horizon of areas that are in high latitude that occurs due to the deflection of the Sun wind direction by the earth's magnetic field to the polar region and reaction occurs with molecular particles in the atmosphere. There are two types of Aurora that is located in the north polar region called Aurora Borealis and at the south pole with the name Aurora Australis. Because Borealis is in the north polar region it will only appear between September and October and for Aurora Austalis appears in March and April each year in the southern hemisphere. So the essence of Aurora is only visible in autumn and winter, because that's when the polar regions have received little sun exposure in other words day is shorter than the night.