I live on an acreage 10 km sw of edmonton, alberta on flight path often used by commercial passenger planes on approach to the edmonton international airport. it was a clear night and i had walked my dog to the end of my driveway approximately 80 feet south of my home. as i turned around and faced north i observed a large equilateral triangle much larger than my two story house fly less than 500 feet directly over my home. it emitted bright glowing white light as it flew with no sound from east to west at a high rate of speed. it was dusk and i witnessed at approx. 5:30 pm on december 20, 2019.