Temperature Luminosity What is a Hertzsprung- Russell diagram? An H-R diagram plots the luminosity and temperature of stars.
Properties of Stars II The Hurtzprung-Russell Diagram How long do stars live? Star clusters.
Announcements
Announcements Reading for next class: Chapters 21 & 22 Cosmos Assignment 3, Due Monday, April 19 1. Astronomy Place tutorial “Measuring Cosmic Distances”,
