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Summer Speaker Series: Deep Waters to Deep Space: Father Angelo Secchi’s Amazing 19th Century Science

August 10, 2023 @ 3:00 pm - 7:00 pm


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At Lake Tahoe, most people have heard the word “Secchi” in reference to the Secchi disk, a 10-inch white disk used to measure lake clarity. The Secchi disk remains the standard design used in both marine and deep-freshwater investigations because it is an inexpensive and straightforward method of measuring water clarity.

However, there is much more to the invention and the inventor. Join Brother Guy Consolmagno, American research astronomer, physicist, religious brother, director of the Vatican Observatory, and President of the Vatican Observatory Foundation, to discover the story behind inventor Angelo Secchi.

Angelo Secchi was a pioneer in astronomical spectroscopy and was one of the first scientists to state authoritatively that the Sun is a star. He invented the heliospectrograph, star spectrograph, and telespectroscope. He showed that certain absorption lines in the spectrum of the Sun were caused by absorption in the Earth’s atmosphere. He developed the first system of stellar classification, which is fundamental to the study of astrophysics. His recognition of molecular bands of carbon radicals in the spectra of some stars made him the discoverer of carbon stars. In addition to astronomy, Secchi was active in oceanography, meteorology, and physics.

This special lecture is accompanied with (but not eclipsed by) an opening poster presentation by our 2023 summer interns who will discuss their projects related to some of the latest TERC research including new approaches for invasive Asian clam management, new insights related to the mass die-off of the Mysis shrimp, and methods for reforestation site selection.

Doors open at 4:00 p.m. for a special student poster session highlighting TERC summer projects. Presentation begins at 6:00 p.m.

Admission is $10 and free for students with a student ID. Refreshments and a no-host bar will be available from 5:30 – 6 p.m. The lecture will begin at 6 p.m. in the conference room at Granlibakken Tahoe, 725 Granlibakken Rd, Tahoe City (please note our new event location).

For more information call 775-881-7560, or visit http://tahoe.ucdavis.edu/events/.

This presentation will be simultaneously webcast live. Join us remotely at 6pm on Thursday, August 10 by clicking on the following link to stream this lecture from your personal device. https://ucdavis.zoom.us/j/92024189848

Click here for more information and to register.


August 10, 2023
3:00 pm - 7:00 pm


UC Davis Tahoe
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Granlibakken, Tahoe City
725 Granlibakken Rd.
Tahoe City, CA 96145 United States
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(530) 583-4242