Northern Lights fanatics have been left "bewildered" after a child blue-coloured spiral resembling a galaxy appeared amid the aroura within the skies of Alaska.Although it may need appeared just like the sudden look of a portal, or the beginnings of an alien invasion, the sky spiral was brought on by extra gas launched from a SpaceX rocket that launched from California about three hours earlier. "Sometimes rockets have fuel that needs to be jettisoned (dropped from the aircraft). When they do that at high altitudes, that fuel turns into ice," area physicist Don Hampton, a analysis affiliate professor on the University of Alaska Fairbanks Geophysical Institute defined."And if it happens to be in the sunlight, when you're in the darkness on the ground, you can see it as a sort ...