3. Aurora Borealis

Aurora Borealis or northern lights is a naturally occurring spectacular display of lights in the sky. It can be seen in Northern and Southern hemisphere.

Interesting Facts About Aurora Borealis

Northern lights can be observed from Alaska, northern parts of Canada, Greenland, Iceland, Sweden and Finland.
It appears in various color such as red, yellow, green, blue and violet in time span between 6 PM TO 4 AM.
It is formed by the collision between gaseous particles on Earth atmosphere and charged particles coming from Sun.
It is extends from 80 km to 640 km in the night sky.