Aurora

Was always amazed by the interesting pictures of Aurora's in school textbooks.

Starting up, the Dictionary defines Aurora as

- a radiant emission from the upper atmosphere that occurs sporadically over the middle and high latitudes of both hemispheres in the form of luminous bands, streamers, or the like, caused by the bombardment of the atmosphere with charged solar particles that are being guided along the earth's magnetic lines of force.

Some interesting pictures below

Detailed information