ASTRONOMY  220  STUDY QUESTIONS FOR EXAM II
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There will be a Review Session a few days before the Exam in CSS
2400. The Review Session will be informal - Bring Questions.  Exam II
(75 points) will be given on Friday, April 17 in CSS 2400 from
11:00-11:50. The exam will consist of 20 multiple choice questions (40
points), and several short answer questions (35 points).


1. Describe the electromagnetic spectrum.
2. Explain how the surface temperature of stars can be determined
	from stellar spectra.
3. Explain how the composition of stars is studied.
4. How can the Doppler effect be used to determine motion of stars?
5. Describe the stellar parallax method. What are the limitations?
6. Upon what factors does luminosity depend?
7. Explain how pulsars generate pulses of radio waves.
8. Describe the properties of a black hole.
9. Describe the evolution of a star like the Sun. How will Earth be affected?
10. What is the source of the Sun's energy today?
11. How does a massive star's evolution differ from that of the Sun?
12. Will the Sun become a supernova in the future? Explain.
13. What 2 forces work against each other throughout a star's life?
14. How did astronomers first describe the arrangement of stars in
	our galaxy? Explain their observations and reasoning.
15. What is our modern view of the arrangement of the galaxy? 
	Explain observations and reasoning.
16. Describe what it would be like to live on a planet whose "sun"
	is a member of an open star cluster? ---a globular star cluster?
	---near galactic center?
17. How does the separation between stars near the Sun compare to
	that within star clusters or near galactic center?
18. What kinds of interactions become more likely in a cluster or near 
	galactic center compared to the solar neighborhood?
19. Explain the differences between wide and close binaries.
20. Describe the three possible cases involving Roche lobes in
	close binaries.
21. What model have astronomers developed to explain novae?
22. Describe how X-rays are produced in some close binary systems.
23. Be able to discuss the specific examples of close binaries
	given in class.


TERMS:
electromagnetic radiation	stellar parallax         	red giant
gamma ray                     	planetary nebula          	white dwarf
X-ray                         	spectral classes         	supernovae
ultraviolet                   	luminosity               	neutron star
visible                       	eclipsing binaries       	black hole
infrared                      	radial velocity          	Milky Way
radio waves                   	hydrogen fusion          	spectrum
interstellar dust             	spiral arm			open cluster
Doppler effect                	Wien's law                    	binary star
red shift                     	globular cluster         	E = mc^2
blue shift                    	Roche lobe			nuclear bulge
close & wide binaries         	accretion disk           	nova
Cygnus X-1	             	Algol				photon sphere
supernova 1987A   		spectroscopic binary		event horizon
electron degeneracy pressure	neutron degeneracy pressure	pulsar