Silent, colorless, tranluscent and of very large size flying at a elevation of 5000 feet.Object was boomerang shaped viewed flying northwest to southeast direction at a high rate of speed, flying 5000 feet high. Object incredible in size, about two football fields in width and totally silent. Object was colorless, almost transluscent only the outline shape was visible. Observers on a nonlit street, moon just starting to rise from east skyline. No evidence of clouds at all.