Question

What is the principle behind formation of auroras?

Answer 1

Aurora is a luminous phenomenon seen in the night sky in high latitudes, occurring most frequently at Earth’s geomagnetic poles. The display of aurora appears as colored arcs, bands and curtains, usually green or red.

The aurora is formed by the interaction of atoms and molecules in the upper atmosphere with charged particles streaming from the sun, attracted to auroral regions by the Earth’s magnetic field. The aurora is known as aurora borealis in the northern hemisphere and as the aurora australis in Southern hemisphere.