2025-2026 Astronomy Course Schedule and Websites

For information about all courses, including those not offered this year, please refer to the Caltech Catalog.

Astrophysics 1 - The Evolving Universe

Spring     Dr. Djorgovski     TBA     TBA     

Astrophysics 20 - Basic Astronomy and the Galaxy

Fall     Dr. Mawet    TR 1:00 - 2:25 pm     257 LAU     Canvas Website

Astrophysics 21 - Galaxies and Cosmology

Winter     Dr. Steidel     MWF 2:00 - 2:55 pm     219 CHL    

Astrophysics 30 - Introduction to Modern Research 

Fall     Dr. Howard   T 7:00 - 8:55 pm     219 CHL     Canvas Website

Astrophysics 31 - Writing in Astronomy

Winter     Dr. Hallinan     F 3:00 - 3:55 pm     219 CHL     

Astrophysics 101 - Physics of Stars

Fall     Dr. Hillenbrand    MWF 3:00 - 3:55 pm    219 CHL    Canvas Website

Astrophysics 102 - Physics of the Interstellar Medium

Winter     Dr. Hopkins     MWF 1:00 - 1:55 pm     219 CHL     

Astrophysics/Physics 104 - Relativistic Astrophysics

Spring     Dr. Phinney     TBA     TBA     

Astrophysics 105 - Optical Astronomy Instrumentation Lab

Spring     Dr. Hallinan     TBA     TBA     

Astrophysics/Ge 107 - Introduction to Astronomical Observation

Spring     Dr. Hillenbrand and Dr. de Kleer     TBA     TBA     

Astrophysics 111 ab -  Introduction to Current Astrophysics Research

Fall     Astrophysics 111a     Dr. Djorgovski   F 11:00 - 11:55 am     219 CHL     Canvas Website

Winter     Astrophysics 111b     Dr. El-Badry     F 11:00 - 11:55 am     219 CHL     

Astrophysics 119 - Astroinformatics

Spring     Dr. Djorgovski, Dr. Graham, Dr. Lombeyda, and Dr. Mahabal    TBA    

Astrophysics 121 - Radiative Processes

Fall     Dr. Kulkarni   TR 10:30 - 11:55 am     219 CHL     Canvas Website

Astrophysics 122 abc - Astronomical Measurements and Instrumentation

Fall     Astrophysics 122a    Dr. Howard and Dr. Kasliwal  TR 1:00 - 2:25 pm    219 CHL   Canvas Website

Spring     Astrophysics 122c     Dr. Ravi     TBA     TBA     

Astrophysics 123 - Structure and Evolution of Stars

Fall     Dr. Fuller      TR 2:30 - 3:55 pm     219 CHL     Canvas Website

Astrophysics 124 - Structure and Evolution of Galaxies

Winter     Dr. Phinney     MW 10:30 - 11:55 am     219 CHL     

Astrophysics 125 - High-Energy Astrophysics

Winter     Dr. Kasliwal and Dr. El-Badry     TR 1:00 - 2:25 pm     219 CHL     

Astrophysics 126 - Interstellar and Intergalactic Medium

Spring     Dr. Steidel     TBA     TBA     

Astrophysics 127 - Astrophysical Cosmology

Spring     Dr. Hopkins   TBA     TBA     

Astrophysics 141 abc - Research Conference in Astronomy

Fall     Astrophysics 141a     Dr. Hillenbrand     F 4:00 - 4:55 pm     370 CHL     Canvas Website

Winter     Astrophysics 141b     Dr. Hallinan     F 4:00 - 4:55 pm     370 CHL     

Spring     Astrophysics 141c     Dr. Fuller     TBA     TBA     

Astrophysics/Ge 198 - Special Topics in the Planetary Sciences

Spring     Dr. Howard    TBA     TBA     

Astrophysics 215 - Seminar in Theoretical Astrophysics

Spring     Dr. Kulkarni     TBA     TBA