The Cerro Tololo Inter-American Observatory

The Cerro Tololo Astronomical Observatory is located about 500km north of Santiago, Chile, about 52km ESE (80km by road) of La Serena, at an altitude of 2200 meters. It lies on a 34,491Ha (85,227 ac.) site known as "Estancia El Tortoral" which was purchased by AURA on the open market in 1967 for use as an astronomical observatory.


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http://www.ctio.noao.edu/