Astronomy 123: Stellar Astrophysics

Spring 2017
Prof. David Cohen

Science Center 161
Mondays 1:15 AM - 4:15 PM



Orion belt HR diagram solar spectrum eta Car: HST





There is a colloquium this week – on Friday at 12:30 in SC 199 – by cosmologist Katie Mack from the University of Melbourne. It is entitled, "Dark Matter in the Cosmic Context."

Natasha is bringing snack next Monday.

We'll have an in-class midterm on the Monday after break (March 13). It will be closed book and you'll be able to bring a page (front and back) of hand-written notes.

Archive of old announcements.


We will start chapter 4 this week – on stellar atmospheres. Our discussion in seminar will be based on assignment 6 [pdf].

Here are three readings from Ostlie and Carroll: (1) radiation pressure etc. [pdf], (2) random walk/diffusion [pdf], (3) mass-luminosity relationship [pdf]

Archive of old assignments.


Class Information

Books and other resources

seminar snack schedule


astrophysical constants and astronomical data in cgs

SIMBAD for information about astronomical objects

ADS for finding research articles

Astronomy Picture of the Day

our seminar Moodle page

department website



Maintained by David Cohen.

Last modified: February 21, 2017