polar arctic northern lights aurora snowscooter borealis sky star in norway svalbard in longyearbyen the moon mountains

adventure alaska antarctic arctic astronomy aurora beautiful beauty black blue borealis cold dark expedition fjord forecast green horizon iceland island landscape light lights longyearbyen magnetic moon mountain mountains natural nature night north northern norway phenomenon polar pole scandinavia season sky snow snowscooter space spitsbergen star svalbard travel tromso view winter