Cerro Tololo Interamerican Observatory is a complex of astronomical telescopes and instruments located approximately 80 km to the East of La Serena, Chile at an altitude of 2200 Meters.
De Cerro Tololo Inter-American Observatory ass e Komplex vun astronomeschen Teleskopen an Instrumenter um Cerro Tololo, ongeféier 80 km ëstlech vu La Serena am Chile op enger Héicht vun 2200 Meter.