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A subset of these questions will comprise Exam 3 in Multiple Choice, T/F, Fill-In, etc., format. You are highly encourage to work on these problems as you read the through the text material for Week 10-14 material (see syllabus).
1. _T____ Our solar system is found in the Milky Way
2. What is the predicted diameter of the dark matter distribution of the Milky Way galaxy?
3. Most of the mass of the Milky Way seems is in what form?
4. What kinds of galaxies are most common?
5. __T___ While galaxies often collide, their stars rarely do.
6. _____ The Milky Way is smaller than most members of the Local Group.
7. Why are the supermassive giant ellipticals found at the centers of the rich galaxy clusters?
9. What two measurements of stars in the galaxy allow us to calculate the Galaxy's entire mass?
10. __T___It would be very unlikely to find a massive, young star out in the halo of our Galaxy.
11. _____The black hole at the center of our galaxy contains two to three million solar masses.
12. What is the diameter of the disk of the Galaxy?
13. Mapping the Milky Way in optical light is difficult because of ________ in the disk.
14. Where is the Sun located within our galaxy?
15. In the formation of our Galaxy, the stars in the ________ formed first.
16. In shape of orbit and types of stars, elliptical galaxies are most like the Milky Way’s:
17. _____ Most galaxies are spirals.
18. Variable stars are stars whose ________ changes over time.
19. The most tightly wound spiral arms belong to which galactic classification?
20. How do elliptical galaxies compare to spiral galaxies?
Part II
21. The Galactic disk contains _____ stars. 22. The roughly spherical region of faint old stars in which the rest of the Galaxy is embedded is the Galactic _____. 23. Why can’t we study the central regions of the Galaxy using optical telescopes? 24. How do motions of the disk and halo stars differ? 25. ______ Most elliptical galaxies contain only old stars. 26. Galaxies are classified using the _____ classification scheme. 27. Galaxies of type _____ have the least amount of gas and dust; type _____ have the most. 28. What are the differences between the various types of spiral galaxies? 29. What are the contents of the Local Group? 30. What is the Virgo Cluster? 31. What is Hubble’s law? 33. _____ Most galaxies appear to be receding from the Milky Way Galaxy.
34 Distant galaxies are measured to be ______ (larger/smaller) in size (diameter) than those nearby.. 35. What are the largest structures in the universe? 36. What is the cosmological principle? 37. Why are recent observations of distant supernovae so important to cosmology? 38. Where and when did the Big Bang occur?
39. What kinds of objects are not found in the Galaxy’s halo?
40. _____ Stars in the Milky Way exhibit differential rotation.
41. Variable stars can be identified by their _____ .
42. The spiral arms of the Milky Way cannot be “tied” to the orbiting stars because _______ .
43. The most circular elliptical galaxies are type ______ .
44. What galaxy type contains only old stars?
45. The Tully-Fisher method for measuring distances is done using which kind of object?
47. Which most accurately describes how galaxies have grown?
48. Beyond what scale is it believed that the universe is homogeneous?
49. The critical density of the universe is about _____ hydrogen atoms per cubic meter.
50. According to the cosmic background radiation, the temperature of the universe is _______ .
51. The Hubble constant gives (can be used to calculate) which age for the universe?
52. There is strong evidence that the universe is _______ .
53. One reason the cosmic microwave background radiation is important is because _____ .
54. What important discoveries were made last this century using RR Lyrae variables?
55. What does the rotation curve of our Galaxy tell us about its total mass?
56. What is Olbers’s paradox?
1. _T____ Our solar system is found in the Milky Way
2. What is the predicted diameter of the dark matter distribution of the Milky Way galaxy?
3. Most of the mass of the Milky Way seems is in what form?
4. What kinds of galaxies are most common?
5. __T___ While galaxies often collide, their stars rarely do.
6. _____ The Milky Way is smaller than most members of the Local Group.
7. Why are the supermassive giant ellipticals found at the centers of the rich galaxy clusters?
9. What two measurements of stars in the galaxy allow us to calculate the Galaxy's entire mass?
10. __T___It would be very unlikely to find a massive, young star out in the halo of our Galaxy.
11. _____The black hole at the center of our galaxy contains two to three million solar masses.
12. What is the diameter of the disk of the Galaxy?
13. Mapping the Milky Way in optical light is difficult because of ________ in the disk.
14. Where is the Sun located within our galaxy?
15. In the formation of our Galaxy, the stars in the ________ formed first.
16. In shape of orbit and types of stars, elliptical galaxies are most like the Milky Way’s:
17. _____ Most galaxies are spirals.
18. Variable stars are stars whose ________ changes over time.
19. The most tightly wound spiral arms belong to which galactic classification?
20. How do elliptical galaxies compare to spiral galaxies?
Part II
21. The Galactic disk contains _____ stars. 22. The roughly spherical region of faint old stars in which the rest of the Galaxy is embedded is the Galactic _____. 23. Why can’t we study the central regions of the Galaxy using optical telescopes? 24. How do motions of the disk and halo stars differ? 25. ______ Most elliptical galaxies contain only old stars. 26. Galaxies are classified using the _____ classification scheme. 27. Galaxies of type _____ have the least amount of gas and dust; type _____ have the most. 28. What are the differences between the various types of spiral galaxies? 29. What are the contents of the Local Group? 30. What is the Virgo Cluster? 31. What is Hubble’s law? 33. _____ Most galaxies appear to be receding from the Milky Way Galaxy.
34 Distant galaxies are measured to be ______ (larger/smaller) in size (diameter) than those nearby.. 35. What are the largest structures in the universe? 36. What is the cosmological principle? 37. Why are recent observations of distant supernovae so important to cosmology? 38. Where and when did the Big Bang occur?
39. What kinds of objects are not found in the Galaxy’s halo?
40. _____ Stars in the Milky Way exhibit differential rotation.
41. Variable stars can be identified by their _____ .
42. The spiral arms of the Milky Way cannot be “tied” to the orbiting stars because _______ .
43. The most circular elliptical galaxies are type ______ .
44. What galaxy type contains only old stars?
45. The Tully-Fisher method for measuring distances is done using which kind of object?
47. Which most accurately describes how galaxies have grown?
48. Beyond what scale is it believed that the universe is homogeneous?
49. The critical density of the universe is about _____ hydrogen atoms per cubic meter.
50. According to the cosmic background radiation, the temperature of the universe is _______ .
51. The Hubble constant gives (can be used to calculate) which age for the universe?
52. There is strong evidence that the universe is _______ .
53. One reason the cosmic microwave background radiation is important is because _____ .
54. What important discoveries were made last this century using RR Lyrae variables?
55. What does the rotation curve of our Galaxy tell us about its total mass?
56. What is Olbers’s paradox?