Fire ball / boxI had let my dogs out for their evening break before going to bed and while walking in the back yard I usually look up at the stars. I turned to the west and noticed a glowing just above the terminator of daylight and night. I stopped and thought that looks in the general vicinity of Venus, but was the wrong color, shape and size. I watched it for a few moments and noticed it was rectangular in shape and floating to the south. I had to judge it was about five miles or more away from me and was going to be hid by trees across the street. I rushed through the house, and to the nearest intersection but it was gone before I got there.Object was as described rectangular in shape standing up on end where it was taller than it was wide. It appeared as it was flame because it flickered like a fire and Orange-Yellow in color. It was not Venus as I located it behind a tree, nor was it a plane unless it was on fire which I do not think it was as it was traveling from north to south. Also I do not believe it could have been fireworks due to height several thousand feet.