Sarazin's ASTR 2120 Home Page

Introduction to Astrophysics II

Spring 2019

This course provides a physics-based, mathematical introduction to the astronomy of stars, galaxies, and the Universe. Topics covered include: the observed properties of stars; stellar interiors; stellar spectra; binary stars; the Sun as a star; the life and death of stars; black holes; binary stars and X-ray sources; the interstellar medium; our Milky Way galaxy; other galaxies; clusters of galaxies; the large-scale structure of the Universe; active galaxies; the expanding universe; cosmology, the Big Bang, and the early Universe. It is intended primarily for Astronomy, Astronomy-Physics, and Physics majors.

The Center of the Whirlpool Galaxy from the Hubble Space Telescope
Whirlpool Galaxy

Class Announcements


Graduate Teaching Assistant

Class Handouts

Class Lecture Notes

The Center of the Antennae Merging Galaxies from the Hubble Space Telescope
Antennae Galaxies




Websites for More Information

WMAP Image of Heat Radiation from the Early Universe
WMAP Image

Last modified February 16, 2019 at 13:34:46 EST by cls7i r2120