I went outside around 8pm to get the luggage out of the car, we're visiting family in Bullhead City, Arizona. I looked skyward and to the west noticed a strange glowing fuzzy light approaching. It was flying slow like a small airplane. It had one bright light on the bottom of it towards what would be the front. There was a fan like light shining out each side from this light. It appeared to be in a dust cloud or fog, but the sky was totally clear. It also had three rectangular soft yellow lights in a row behind the bright light. As it got a mile or two to the east it dimmed to black and was no longer visible. It was completely silent and had no typical aircraft identification lights of any kind