He advanced the study of a millenniums-old mystery: why the moon appears larger on the horizon than it does high in the night sky. He advanced the study of a millenniums-old mystery: why the moon appears larger on the horizon than it does high in the night sky. Deaths (Obituaries), Moon, Psychology and Psychologists, Eyes and Eyesight, Kaufman, Lloyd, Rock, Irvin (Dr), Moon illusion, Long Island University, New York University NYT > Science