Mount Graham International Observatory, Astronomical observatory on Mount Graham, Arizona, US.
The Mount Graham International Observatory contains three major research telescopes at an elevation of 3,191 meters in the Pinaleño Mountains of southeastern Arizona.
The facility started operations in 1993 with the Vatican Advanced Technology Telescope and the Heinrich Hertz Submillimeter Telescope, followed by the Large Binocular Telescope in 2004.
The San Carlos Apache Tribal Council maintains opposition to the observatory's construction on their ancestral mountain, which holds religious importance for Western Apache peoples.
Visitors can join guided tours from mid-May through October at Eastern Arizona College's Discovery Park Campus, requiring advance reservations due to access restrictions.
Scientists from multiple nations conduct research at the observatory, using instruments including the Large Binocular Telescope, which features two 8.4-meter mirrors.
Location: Graham County
Elevation above the sea: 3,191 m
Website: http://mgio.arizona.edu/
Website: http://mgio.arizona.edu
GPS coordinates: 32.70122,-109.89206
Latest update: May 13, 2025 13:51
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