Caltech's undergraduate Astrophysics (Ay) option provides rigorous training in the fundamental concepts, experimental techniques, and modern research questions of astronomy and astrophysics. Students complete a structured curriculum beginning with core physical sciences and mathematics, followed by advanced coursework in areas such as galaxies, cosmology, observational techniques, and contemporary research. Hands-on experience through laboratory and research courses is emphasized, preparing graduates for further study or technical careers in scientific fields. The program leverages Caltech's leadership in astrophysical research and facilities, including engagement with current research conducted at the institute. Students often join research projects and work closely with faculty, benefiting from small class sizes and an interdisciplinary environment. 来源： https://www.pma.caltech.edu/courses/undergrad