Very hard question I bet you can't answer?

Sun + Aurora Borealis + ________________

What third astrological term fits?

Must also consider spiritual and mythological connotations of the selection. (Ancient cultures; views and explanations of above phenomona)

Figure out a third term that corrolates with the first two, and explain your rational.

Very hard question I bet you can't answer?internet security software

I think it is the Inner Earth or Outer Space.

Very hard question I bet you can't answer?moto guzzi

i bet you lost the bet.

the midnight sun, aurora borealis, and arctic mirages. The rich cultural heritage, expressed in the famous Icelandic Sagas, dates back to the early medieval era of Nordic and Celtic settlement and discovery.

http://www.infohub.com/TRAVEL/SIT/sit_pa...

also:

the Midnight Sun, Aurora Borealis %26 Polar Nights: The most spectacular place to observe the Midnight Sun it is in the northern fjords of Norway, and specially in the Nordkapp, between late May and late July. The Midnight Sun is always at its best north of the Artic Circle. The Aurora Borealis (northern lights) is best seen on the Artic Circle in very clear and dark winter nights. They have been seen in southern Scandinavia sometimes, but it is very important that you are in a dark and clear night, away from the city. Winter travelers can experience the Polar Nights.

http://goscandinavia.about.com/od/scandi...
Inner Earth.