Call them Northern Lights, or Aurora Borealis this natural phenomenon is not available for viewing in many parts of the world. Which I think is unfortunate as they are spectacular.

They dance and shift, waves of light appear, intensify then fade as they drift about, change form and multiply only to fade away. They may form fingers of light as seen here or clouds not unlike storm clouds.

Some say they sing, I have never heard any sound coming from them, but I wouldn't be shocked if it were true.
They can be thin bands of light barely visible or light up the night sky to such a degree that the whole countryside is lit with their brilliance.

I live in one of the better place for observing them, so I think it only fair to share as best as I can.

With that in mind I share here one evening of Northern Lights watching in my yard.