Recent SemestersSpring 2027, Fall 2026, Summer 2026, Spring 2026, Fall 2025Class Size35–104 studentsCredits3 Transfers ToUC and CSUCal-GETC Area 5A · IGETC Area 5A · CSU GE Area B1DescriptionIntroduction to the origin, evolution and structure of the solar system, stars, galaxies and the Universe. Milestones in the science of astronomy from ancient times to the space age. Historical development of astronomical ideas leading to current models. Special focus on the latest discoveries from both ground- and space-based instruments. Consideration of current controversies in astronomy and the future of astronomical research. Enrollment Limitation: ASTR A100H ; students who complete ASTR A100 may not enroll in or receive credit for ASTR A100H .Usually HeldTue Thu 12:45pm–2:10pm, Tue Thu 9:35am–11:00am, Mon Tue Wed Thu 9:00am–12:20pm, Mon Wed 5:30pm–6:55pm 