Quiz

1. What is parallax?
2. What is luminosity?
3. How do we measure stellar luminosities?
4. How do we measure stellar temperatures?
5. What is a Hertzsprung-Russell diagram?
6. What is the significance of the main sequence?
7. Who was Ejnar Hertzsprung?
8. Who was Henry Norris Russell?
9. What is the mass of Betelgeuse?
10. What is the parallax of Sirius?

Hint: Search in Wikipedia for Hertzsprung, Russell, Betelgeuse, and Sirius.