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Tessmann Planetarium - Welcome to our dome

​The Tessmann Mission​

To spark the flame of understanding and inspiration for our college students, staff, and community through education and exploration of our Universe.​

The Tessmann Planetarium is a 100-seat planetarium located on the campus of Santa Ana College in Santa Ana, California, in the heart of Orange County.  This facility has been inspiring students to study and discover careers in science, education and engineering for almost fifty years by bringing to life the wonders of the universe for anyone with an interest in astronomy and the space program.

As scientists unravel the complexities of the cosmos, key findings are revealing amazing new frontiers for exploration. Come along on a journey about what we already know and about the mysteries we have yet to solve. Travel beyond the night sky and into deep space to find out how discoveries over the past 100 years have led us to the pivotal moments that have brought us unprecedented knowledge of the universe and our place in it.

To glimpse the exciting future of cosmic exploration, make a reservation today.

View Schedule/Order Tickets Online​


Santa Ana College is accredited by the Accrediting Commission for Community and Junior Colleges, Western Association of Schools and Colleges, 10 Commercial Blvd., Suite 204, Novato, CA 94949, (415) 506-0234, an institutional accrediting body recognized by the Council for Higher Education Accreditation and the U.S. Department of Education. Additional information about accreditation, including the filing of complaints against member institutions, can be found at: