Recent SemestersFall 2026, Spring 2026, Fall 2025, Summer 2025, Spring 2025Class Size35–60 studentsCredits1PrerequisiteSuccessful completion of Elementary Algebra or equivalent, or placement by other measures as applicable and completion of or concurrent enrollment in, ASTR 100 or ASTR 115 or ASTR 125 . Transfers ToUC and CSUCal-GETC Area 5C · IGETC Area 5C · IGETC Area 5A · CSU GE Area B3DescriptionConstellation identification, understanding of right ascension and declination, and basic astronomical measurements of our moon, planets, and stars. Occasional telescopic observations using CSM's observatory. With ASTR 100, ASTR 115, or ASTR 125, satisfies lab requirements for UC and California State Universities. Extra supplies may be required.Usually HeldMon 2:25pm–5:30pm, Thu 2:25pm–5:15pm, Tue 2:10pm–5:00pm, Mon 2:10pm–5:15pm 