Astronomy Picture of the Day
NASA Astronomy Picture of the Day

Current solar images

Frederick A. Ringwald

Professor of Physics
Director, Fresno State's Observatories
Department of Physics
California State University, Fresno

Ph.D. in Physics, Dartmouth College, 1993

Curriculum Vitae / Publications and Preprints
Professor Ringwald's 2021 Spring Schedule

2021 Spring Classes:
Phys 4C Light and Modern Physics
Phys 150 Astrophysics
PSci 21 Elementary Astronomy
Coordinating: PSci 21 Elementary Astronomy Labs

Classes from Previous Semesters

Current space weather / Sunspot numbers
Accurate time / My picture

Research opportunities
for Fresno State students

Gallery of images from the Campus Observatory,
the Sierra Nevada, and Mount Laguna

Adventure! Excitement!


Research Interests: Multiwavelength observational astronomy of cataclysmic variables, nova shells, accretion disks and outflows, X-ray binaries and black holes, common envelope evolution, stellar magnetism, exoplanets, starburst galaxies, quasars, time-series analysis; also spaceflight and astronomical instrumentation.


Images taken at Fresno State's Campus Observatory At left: Some images from
Fresno State's Campus Observatory.


Email: ringwald[at]csufresno.edu and replace [at] with @

(559) 278-8426 : Phone


Office hours (via Zoom, send email, or phone me, from 2021 January 21 to May 6):

MoTuWeTh 5:30-7:00 p.m.


Postal mail address:
2345 E. San Ramon Ave., M/S MH37
Fresno, CA 93740-8031, U.S.A.



Here is the department brochure that I edited. It's a pdf file that you can read with Adobe Acrobat Reader, a free program available here. Here is a recruiting slide.
Last updated 2021 January 20. Webpage by Professor Ringwald
Department of Physics, California State University, Fresno. Please read this disclaimer.