Carnot-Moon (kahr-NO), uninc. city (1990 pop. 10,187), Allegheny co., W Pa., residential suburb 13 mi/21 km WNW of Pittsburgh, near Ohio R.; 40°31'N 80°12'W. Includes communities of Carnot and Moon, each with a pop. of c.5,000. Pittsburgh Internatl. Airport to SW.