1. Stars

6. Hertzsprung-Russell Diagram http://www.dustbunny.com/afk/stars/lifecycle/hrdiagram.gif

8. Types of Stars Classification Red 2,000 – 3,500 K M Orange 3,500 – 5,000 K K Yellow 5,000 – 6,000 K G Yellow-white 6,000 – 7,500 K F White 7,500 – 10,000 K A Blue-white 10,000 – 30,000 K B Blue 20,000- 60,000 K O Color Temperature Class

9. http://www.answers.com/topic/stellar-classification

10. Life Cycle of Stars http://hea-www.cfa.harvard.edu/CHAMP/EDUCATION/PUBLIC/ICONS/life_cycles.jpg

17. Life Cycle of Stars http://www.seasky.org/cosmic/sky7a01.html