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Director Buell JannuziWelcome to the website of the Department of Astronomy and Steward Observatory of the University of Arizona. Our students, staff, and faculty work together to improve our understanding of the universe in which we live and to share what we learn in effective and inspiring ways.  

We offer undergraduate and graduate degree programs as well as a broad selection of general education courses. Descriptions of course offerings as well as pathways to degrees are available in the Academics section.

The University of Arizona is a world leader in space sciences related research. The research activities pursued by the staff, students, and faculty of the Department of Astronomy and Steward Observatory are introduced in the Research section.

- Professor Buell Jannuzi, Director of Steward Observatory

For the public
For Public

Public events include our Monday Night Lecture Series, world-reknowned Astronomy Camp and Mt Lemmon Sky Center.

For Students

A good place to start if you want to become an undergrad major or grad student, or need to find our schedule of classes.


For Scientists
For Scientists

Find telescopes and instruments, telescope time applications, staff and mountain contacts, and faculty and staff scientific interests.