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Public Evening Lecture Series



Lavinia Steward made her historic contribution of $60,000 to the University of Arizona “…TO BUY TELESCOPE OF HUGE SIZE,” on October 18, 1916.  However, the United States entry into World War I delayed the construction of the Steward Telescope and its 36-inch mirror.  That original Steward Telescope was finally used for the first time on July 17, 1922.  It would take another 9 months before the Steward Observatory and Telescope would be formally and officially dedicated on April 23, 1923.

The Telescope, however, was ready to be used before the official dedication date and Prof. Andrew Ellicott Douglass, the first Director of Steward Observatory, did not leave the telescope idle. He invited members of the campus and Tucson communities to view the wonders of the night sky through this new, large (for the time) telescope.  The date was September 28, 1922, and the Steward Observatory Public Evenings were born.

We are thrilled to able to celebrate 100 years of presenting lectures on astronomy and telescope viewing to the public by offering a special Public Evening Lecture on the 100th Anniversary of the very first Steward Public Evening.  

Please save the dates for the following Public Evening Lectures, which will begin at 7:30 p.m. in Steward Observatory Room N210 and on our NEW ZOOM at the URL:

All of the lectures and the use of the telescope are free of charge and open to the general public.

For more information, contact Dr. Thomas Fleming at 621-5049 or

Sign up for our monthly Astronomy Newsletter for more information about our lectures and other events taking place at


Click here to stream podcasts of previous Public Evening Lectures.


Fall 2022 Centennial Year Lectures



Sep. 19

Dr. Thomas Fleming

Dr. Buell Jannuzi, Director

Steward Observatory

100 Years of Steward Observatory
Sep. 28

Dr. Marcia Rieke

Regents Professor

Dr. Elizabeth Roemer Endowed Chair

Steward Observatory

The Webb Telescope: Starting Steward Observatory's Next 100 Years
Oct. 3

Dr. Daniel Marone

Steward Observatory

Imaging Black Holes with the Event Horizon Telescope
Oct. 17

Dr. Christopher Walker

Steward Observtory

Floating Above Antarctica: The GUSTO Mission
Nov. 14

Dr. Laird Close

Steward Observatory

Adaptive Optics at Steward Observatory
Nov. 28

Dr. Becca Levy

Steward Observatory

A JWST View of Starburst Galaxies: Sweet Data Coming Soon!



Prof. A. E. Douglass           Prof. Marcia Rieke

Sep. 28, 1922 Speaker        Sep. 28, 2022 Speaker

For the public
For Public

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