The observatory, which cost half a million U.S. dollars to build, is located at the Pierre and Marie Curie School in Managua.
The telescope's main lens is 11 inches across and can magnify stellar objects by 50 to 800 times.
The second floor, dedicated to the study of physics, is named for Isaac Newton.
The observatory is named Neil Armstrong in honor of the first man to touch the Moon, during the Apollo 11 mission in 1969.
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