I currently work on a military base located in the Southeastern corner of Alberta. When I left work this evening, while travelling South on Hwy 884, I noticed an extremely large, bright, white light to my left in the middle of the training area, (which I know presently is a no-fly zone), moving in a straight line in a NE to SW direction at an incredible rate of speed. Upon looking at my map when I got home, I surmised that the distance this object travelled from my location to the point it disappeared into the clouds was approximately 30 plus kilometers. This all happened in a matter of just 2 seconds. Having been in the military for 20 plus years, I have seen my share of aircraft, both military and civilian, of various sizes, shapes and configurations. What I saw this evening was definitely not a man-made aircraft and was not high enough in the sky to be a meteorite. Due to the brightness and travelling speed of this object, it was difficult to determine its exact size or shape. I have never seen anything move that fast before.