1. Have you thoroughly read chapter 9?

2. What is a black hole?

3. How big is a googol?

4. What is the origin of the Crab Nebula?

5. Will our sun go through a red giant stage?

6. In what stage will our sun end up in 10 billion years?

7. Write the mathematical symbol for infinity.

8. What is the difference between nuclear fission and nuclear fusion?

9. What is a pulsar?

10. Sagan says on page 237, "Unhappily, no supernova explosions have been observed in our Galaxy since the invention of the telescope, and astronomers have been chafing at the bit for centuries." Though technically still true, a relatively nearby supernova was discovered in February 1987 (since Sagan produced Cosmos). Do a little library research to tell me the last name of the Ian who discovered it, and in what South American country, what the supernova is called (numerical designation), and where it is located (what satellite galaxy).