I was driving north on Highway 53 and spotted a long rectangular object in the sky that was thin in profile but grey/silver in color and somewhat bright due to the sun. In the time it took for me to blink the object just disappeared. I scanned the sky, but it was no where to be found. This was about quarter to 10 in the morning central standard time. I was traveling in between Solon Springs WI and Lake Nebagamon WI, but just outside Solon Springs when I saw the object in the sky slightly above the tree line. Frankly, I stepped on the gas to try to get closer to possibly photograph the object but by the time I thought about doing that the object was gone. It flew above the trees in a straight line going east for a while then it seemed to be moving further away going north east, then it was gone as if it just vanished into thin air.