Aurora is a natural light display in the sky. It is usually of greenish color but sometimes red or blue. This natural occurrence usually occurs near the poles of the Arctic in the north and Antarctic in the south.
In the Southern hemisphere, the effect is known as the Southern Lights. Aurora occurs when electrically charged particles accelerate along the magnetic field lines into the upper atmosphere. There they collide with gas atoms, causing the atoms to give off light.
Why is Aroura green? Aroura is mostly green because when solar particles collide with our atmosphere at altitude of around 60 to 150 miles where there are high concentrations of oxygen. When the Oxygen is excited at these altitudes it causes the Aurora to appear in shades of green.
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