On the northern hemispheres it's Aurora Borealis while the southern lights is Aurora Australis - both are caused by the same phenomena.
The aurora is caused by particles from the sun striking atoms in earth’s atmosphere. These solar particles called “solar wind” are expelled by the sun all the time, and the atmosphere protects us from the particles. When the solar particles hits the atmosphere, oxygen and hydrogen atoms light up, emitting colours like green, red, purple, and white.
