UA Science
Save the Date! 100 Year Anniversary Celebration

How a Trio of Observatories Around Tucson is Changing Astronomy

The “Tucson Triangle” is the greatest collection of scopes and spectrographs in the continental U.S.

Amid the burning Arizona sands, three peaks form a triangle of superlatives surrounding Tucson. Atop Mount Graham sits the world’s largest optical telescope. Mount Hopkins is home to North America’s second-largest single-mirror telescope. And Kitt Peak contains the continent’s largest single collection of mountaintop astronomical instruments. More Information.

Student-built satellite uses 'beach ball' for an antenna

CatSat is a small satellite carrying a new communications concept – an inflatable antenna – into space. The project provides a rare opportunity for students at the University of Arizona to get hands-on experience with spaceflight technology.

The project began in 2019 when Chris Walker, a UArizona professor of astronomy, along with a team of faculty members from other departments, submitted a proposal to NASA as part of the NASA CubeSat Launch Initiative. NASA saw potential and agreed to provide a launch vehicle for CatSat.

"The technology demonstrated by CatSat opens the door to the possibility of future lunar, planetary and deep-space missions using CubeSats," said Walker,...

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.