The aim of this book is to study how stars form, how they sustain their light output for long periods of time, what happens to them as they age, their impact on the production of the elements and what becomes of them when they exhaust their fuel. Please note that activities in this book involve readings from the textbook, The Physics of Stars, by Phillips and published by Wiley, and also include activities on the web, spreadsheet calculations and activities from the CD ROM Blocks 1-4 Image Archive.