Kitt Peak National Observatory, Astronomical observatory in Arizona, United States
Kitt Peak National Observatory is an astronomical facility in the Quinlan Mountains of southern Arizona. More than twenty optical telescopes and two radio telescopes stand on the summit at an elevation of 2096 meters (6877 feet).
The National Science Foundation founded the observatory in 1958, choosing the site for its clear skies. A formal agreement with the Tohono O'odham Nation allowed construction on traditional tribal land.
The observatory stands on Tohono O'odham Nation land, where the mountain was traditionally known as I'oligam Du'ag, meaning Manzanita Bush Mountain.
Daytime tours and evening observation programs require advance booking because space is limited. The access road climbs through steep switchbacks and may close during poor weather.
The Mayall Telescope with its 4-meter (158-inch) mirror has mapped millions of galaxies since it began operations. A specialized sky survey now uses this instrument to study the distribution of dark energy across the universe.
Location: Arizona
Inception: 1958
Official opening: 1958
Elevation above the sea: 2,096 m
Website: https://noirlab.edu/public/programs/kitt-peak-national-observatory
GPS coordinates: 31.95833,-111.59667
Latest update: December 5, 2025 22:24
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