Aurora Borealis

Foto: National Geografic

A streak of auroral light mimics the curve of an illuminated bridge near Sommarøya in northern Norway on January 7.

The glowing display of curtains, arcs, and bands in the sky is called aurora borealis, or northern lights, in the Northern Hemisphere and aurora australis, or southern lights, in the Southern Hemisphere.
Detalii: National Geografic.