Talking with neighbor in front yard and just glanced up and saw round silver object moving very rapidly toward w/sw. First impression was that this is a UFO as no wings , etc were visible. It was moving in westly direction and then veered to southwestly direction. Event lasted @ 20 seconds and lost sight due to tall pine trees. Sky is clear and it moved very quickly out of sight. Neighbor did not see it. An airliner flew by @ same altitude 30 seconds later and I would estimate at 1/5 the speed of the object. It was exciting to see this object and wished I had had my video camera. I am a former AF officer.