Three lights in Sky rapidly moving away from one another from a single point.UFO sighting. 7-21-2016. 2300 hours MST. Over Missoula, MT, looking south into a clear dark sky. Clouds low on the horizon did not obstruct view.A single white star-looking light (non-blinking, high elevation) appeared to break apart into three separate non-blinking lights. The lights rapidly, as of being repelled from one another, moved it three separate directions that originated from a single point in the sky.The brightest light was moving straight north. The two other lights (both white) were moving in an almost 33° angle from one another. One was heading south east the other in a south west direction. They initially were moving at what appeared to be an extremely high rate of speed, but from my location they both appeared to slow over a 10 to 15 second time frame before becoming too faint to see. There speed seemed to be equivalent to one another. Perhaps the other two lights were jettisoned from the northbound light.The northbound light remained bright white (non-blinking) and appeared to keep a steady speed. I watched it for almost 2 minutes before it was out of sight. It clearly was moving much faster than other air traffic in the sky.I didn't hear any sounds. I was out walking the dogs on a dark walking path in a non-illuminated area with an unobstructed view of the sky.