Steward Observatory

Steward Observatory is a research facility of the University of Arizona that operates telescopes at multiple locations. The Richard F. Caris Mirror Laboratory within this complex manufactures specialized mirrors used by telescopes around the world.

The facility was established in 1916 through a substantial donation and began operating in 1923 with its first large telescope. This early instrument was notable because all its components were manufactured within the United States.

The observatory honors Lavinia Steward, whose generosity made its founding possible. Today, visitors can see how the facility remains deeply connected to the university and helps shape how astronomy is taught and discussed locally.

The site houses both research areas and an active laboratory where visitors can learn about optical engineering and mirror making. It is best to check ahead about access, as not all areas are open to the public.

The laboratory here does not only make mirrors for its own telescopes but supplies observatories around the globe with highly precise optical components. This makes the facility a critical hub in worldwide astronomical research.

Location: Tucson

Inception: 1916

Elevation above the sea: 792 m

Website: https://astro.arizona.edu

GPS coordinates: 32.23319,-110.94899

Latest update: December 10, 2025 16:02