... Credit: Processing - Noel Carboni , Imaging - Greg Parker, New Forest Observatory Explanation: Is this coat hanger a star cluster or an asterism? This cosmic hang-up has been debated over much of last century, as astronomers wondered whether this binocular-visible object is really a physically associated open cluster or a chance projection. ... On the far right of the image is the open cluster of stars NGC 6802 . ... Publications with keywords: asterism - open cluster . ... NGC 7129 and NGC 7142 . ...