Glowing silver cylinder seen in daylight.This occurred on 11/28/2008, 15:40. My son and I where outside playing catch in our front yard. We live near the O'Hare air corridor and routinely see many commercial aircraft. As I caught a toss, I noticed bright, silver, glowing cylinder flying possibly 1000 feet in altitude. My son and I noted that the cylinder had no wings, no tail rudder and made no noise. I estimate that the cylinder may have been 100 plus feet in length. There was no mistaking this object for a commercial aircraft. The object just traveled in a straight line from North to South until it faded into a dot and disappeared into the horizon. The sky was cloudless and it was very light out.