Enthusiasts of the phenomenon "Aurora Borealis", otherwise known as the northern lights, were lucky enough to see a spectacle in the sky of Alaska, when a blue spiral, similar to a galaxy, appeared for several minutes in the middle of the northern lights.
Saturday morning's celestial show resembled something out of a science fiction movie, with a portal opening to the far reaches of the universe.
The phenomenon was caused by the fuel spill of a SpaceX rocket launched from California about three hours ago.
In some cases, rockets have excess fuel that must be discarded, says space physicist Don Hampton, a professor at the University of Alaska Geophysical Institute in Fairbanks.

The professor says that when fuel is spilled at high altitudes, the fuel turns into ice. "When this happens in the sunlight, and the earth is covered in darkness, you can see a kind of large, and sometimes swirling, cloud." Although not often seen, Mr Hampton said he has seen such occurrences three times.
The twisting moments were captured by the Geophysical Institute's cameras and have been widely shared, creating an internet storm, the professor said.
SpaceX's rocket launched Friday evening from Vandenberg Space Force Base in California with about 25 satellites on board. The timing of the fuel spill and the fact that it was a polar launch made the blue spiral visible over a large area of Alaska.
In January, another spiral was seen over the Big Island of Hawaii. A camera on the summit of Mauna Kea, outside the National Astronomical Observatory of Japan's Subaru Telescope, filmed a spiral swirling in the night sky. Researchers said it was created by sending a military satellite into space via a SpaceX rocket launched in Florida.