An all-sky aurora from Churchill, Manitoba, on Feb 17, 2015, in a frame from a 250-frame time-lapse movie. Taken from the Churchill Northern Studies Centre, using an 8mm Sigma fish-eye lens on the Canon 6D for a 360° view of the sky, though with the camera titled about 25° to create an image suitable for projection in a tilted-dome digital planetarium. This a 15-second exposure at ISO 3200 and f/3.5. The temperature was about -30° C.
The Amazing Sky 