Introductory Astronomy for Majors II Credit Hours: 3 hours. Our sun and other stars, their physical properties and evolution. Interstellar matter and star formation. The origin and evolution of our galaxy, other galaxies, quasars, and the Universe. This course is for intended physics and astronomy majors. Offered spring semester every year. Duplicate Credit: Not open to students with credit in ASTR 1120H Semester Offered: Spring Level: Undergraduate