What is CTIO ?
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Cerro Tololo Inter-American Observatory
this observatory is at a height of 2, is 200 meters from the sea level. by 31 universities from the USA, and 5 University of the world operated.
most of the budget of this centre by the Observatory optics and the U.S. national supply.
This is the Observatory at 10 km north of the Observatory Cedar in Chile are located.