My wife and i like to sit out back and stargaze. we often see unexplainable objects in the sky and have started looking for these. tonight we saw a bright oval object appear overhead very high up...If i had to guess, i'd say 15,000 ft. but it is just a guess. the object was traveling east very fast when it lit up. it literally made a hard 90 degree turn to the south-west as the light faded it sped off across the sky and out of sight...The event lasted only seconds but we both saw it. very exciting observation!