AURORA: THE LIGHT OF POLES

Space view of Aurora Lights 

Firstly, we need to know about the aurora. Auroras are the light which is produced naturally by collision of charge particles with gasses molecules present in the atmosphere. Predominantly sun in high latitude region like arctic and Antarctic.

This light produces always at poles because magnetic field of earth is stronger on the poles and also the density of magnetic field lines is high there. Thus, a large number of charge particles found at the poles. The charge particles collide with the gasses to making them excited that cause  coloured visible light. When the charge particle collides with oxygen molecules then green light is emitted mostly but sometimes it produce red light and when collides with nitrogen molecules then more pink , orange or red colours emitted.

Different types of Aurora Light seen on different places 

These light appearing near the North Pole and South Pole. Scientist name these light as at North Pole light called “Aurora borealis” and at South pole light called “Aurora Australis”. They are visible from space also. Satellite can take picture of the aurora from earth’s orbit. This phenomenon also happens on other plants of the universe. “Voyagers 1 & 2” are the first probes to bring back picture of aurora on Jupiter and Saturn and later Uranus and Neptune. Since then, the Hubble space telescope has taken picture of them as well.

-By Mratyunjay Saxena