Star Quiz

Okay, here is the ONLY real test on the subject of Astronomy in this entire course. Astronomy, by defnintion, is the study of stars, and therefore different from planetology, solar physics, cosmology, etc. I know that there is a great deal of material covered in the Star Unit, and that it is too much for a high school course. However, there are a few basic things about stars that I believe you ought to know. You can go back and forth within the Star Unit to get answers for any of your questions.

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I have 20 questions listed below. You are required to answer the 2 math questions and 13 others of your choosing.

1. In the lifetime of ANY star, what is the most important physical property.

2. Our Sun is described as a G2V star. What does that designation mean?

3. Astronomers who take pictures of stars at night can really not tell how far away it is. What do they learn about the star from the picture?

4. What is the nearest star to our Sun, and how far away is it?

5. What two forces work against each other during a star's lifetime, and why are all stars spheres?

6. Eventually, out Sun will expand to become a Red Giant. Why will it be red?

7. When our Sun becomes a White Dwarf, approximately how small with it become, and what will prevent gravity from making it smaller.

8. What would happen to a star whose core mass is between 1.4 and 3 solar masses. How small would this star be, and what will prevent gravity from making it smaller?

9. What is a Pulsar?

10. What is the ultimate fate of a star whose mass is over 10 solar masses at the end of its life?

11. Crosby, Stills, Nash, and Young sang a song at Woodstock, claiming that we are stardust. According to astronomers, where did the heavy elements in the world, and in our bodies come from?

12. If I were to throw you into the Event Horizon of a Black Hole, what would I observe?

13. If I were to throw you into the Event Horizon of a Black Hole, what would you experience?

14. Near the and of the lifetime of most stars, they go through a period of time on the HR Diagram called the Asymptotic Giant Branch. What is happening to a star at this stage of its lifecycle?

15. Why do Red Dwarf stars live so much longer than Blue Giant stars?

16. What do the letters AAVSO stand for, and what do its members study?

17. REQUIRED MATH QUESTION: If a star has an apparent magnitude (m) of 14, and an absolute magnitude (M) of -2, how far away is it from Earth, measured in parsecs and light years?

18. REQUIRED MATH QUESTION: If a Black Hole has a mass of 20 solar masses, what is the escape velocity at a radius of 20 km from the center? Is it possible to go this speed? One solar mass is 1.989x10^30 kg, and remember, you must convert 20 km into 20,000 m.

19. What process forms a planetary nebula?

20. What did you like the most about this Unit?

REMEMBER, If you do not push the "submit" button, your work is for naught.


       


Well done, I hope. You can go back to Stars at anytime, or if you are done you can go to the Syllabus .


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