ASTRO 20 - Stars, Galaxies, and Cosmology

    Recent Professors
    D. Trelawny
    Recent Semesters
    Spring 2026
    Class Size
    35 students
    Credits
    4
    Prerequisite
    Advisory: MATH 103.
    Spring 2026 Sections
    View Spring 2026 sections of ASTRO 20
    Transfers To
    UC and CSUCal-GETC Area 5A · Cal-GETC Area 5C · IGETC Area 5A · IGETC Area 5C · CSU GE Area B1 · CSU GE Area B3
    Description
    This course is a descriptive introduction to the nature and evolution of stars and galaxies as well as the origin and evolution of the universe. An emphasis will be placed on the observational evidence used by cosmologists to help develop their theories. A study of the types of stars, including the sun, binary stars, variable stars, white dwarfs, neutron stars is included. Types of galaxies and their distribution in the universe, dark matter, dark energy, supernovae, and black holes will be examined. There may be optional field trips. (A, CSU, UC, Cal-GETC)
    Usually Held
    Tue 12:30pm–3:20pm, Tue Thu 11:00am–12:15pm