We were out watching the perseid meteor showers. clear night; dark sky. this cylindrical-shaped "cloud" appeared overhead and it was a cloudless night. seemed to be like an ordinary white/gray cloud except for the distinct shape that remained constant. also, seemed to be bright on the inside without any definitive shape or structure.....Just very bright on the inside that seemed to fade into the cloud-like appearance towards the perimeter. slowly glided towards the east. speed remained slow and constant. no sound. suddenly disappeared over the trees. i life on a golf course and there are trees outside our patio. it was definitely not a cloud.