Question 1

Good tracers of the spiral arms of our galaxy are all
I. very old.
II. very young.
III. very luminous.
IV. moving with large radial velocities.

Accepted Answer

A)   I & III
B)   I & IV
C)   II & III
D)   II & IV
E)   I, III, & IV

Question 2

The center of our galaxy is located in the direction of the constellation of Orion.

Accepted Answer

A) True 
 B)False

Question 3

The Herschels' grindstone model of the Milky Way star system was too small because

Accepted Answer

A)   they did not count the brightest stars.
B)   they did not study the southern sky.
C)   they did not have large enough telescopes.
D)   they only observed stars in the disk of the galaxy and not the halo.
E)   they did not know about interstellar dust clouds.

Question 4

What color in the above image best represents the bulge?

Accepted Answer

A)   pink
B)   blue
C)   black
D)   milky white

Question 5

​ Why does the rotation of our galaxy suggest that it is more massive than previously thought?

Accepted Answer

The best observations of the rotation cu...

Question 6

Which mass star experiences more pulsations than the others shown at the time the systems were plotted in the above H-R diagram?

Accepted Answer

A)   9-solar-mass star
B)   5-solar-mass star
C)   3-solar-mass star
D)   RR Lyrae

Question 7

Spiral tracers tend to be old, luminous stars.

Accepted Answer

A) True 
 B)False

Question 8

​ Compare and contrast the properties of disk and halo stars.

Accepted Answer

Most of the stars in the disk are mid...

Question 9

Stars motion within the disk of the Milky Way galaxy are ordered in that they the all go in the same direction, counter-clockwise, as viewed from above (e.g., as viewed from above the north rotational axis of the Sun),

Accepted Answer

A) True 
 B)False

Question 10

Compared to stars within the disk, halo stars

Accepted Answer

A)   orbit at random inclinations to the galactic plane
B)   orbit at different speeds
C)   orbit with paths crossing
D)   All of the other choices are correct.

Question 11

____________________ are groups of 100,000 to 1,000,000 population II stars firmly bound by gravity.

Accepted Answer

The answer of ____________________ are groups of 100,000 to 1,000,000...

Question 12

___________ of the Milky Way contains mostly old (population II)  stars and globular clusters.

Accepted Answer

A)   The disk component
B)   The spherical halo component
C)   The hydrogen gas in the disk
D)   The spiral arms
E)   Sgr A*

Question 13

The orbits of halo stars are typically circular and have a low inclination with respect to the disk.

Accepted Answer

A) True 
 B)False

Question 14

What evidence do we have that the center of our galaxy is a powerful source of energy and a supermassive black hole?

Accepted Answer

A stronomers have been able to use large...

Question 15

The first stars to form in our galaxy

Accepted Answer

A)   had circular orbits.
B)   had highly elongated elliptical orbits.
C)   were population I stars.
D)   all had orbits in the same plane.
E)   formed the galactic clusters we see today.

Question 16

The galaxy shown above is ___________.

Accepted Answer

A)   a grand design
B)   a flocculent
C)   in between a grand design and a flocculent
D)   the Milky Way galaxy

Question 17

The blue color in this visual wavelength image indicates

Accepted Answer

A)   globular clusters.
B)   halo stars.
C)   young stars.
D)   cool stars.

Question 18

Old stars are poor in heavy elements because there were very few previous generations of stars before the old stars formed.

Accepted Answer

A) True 
 B)False

Question 19

The disk of our galaxy consists of

Accepted Answer

A)   the nine known planets.
B)   only stars.
C)   stars, dust, and gas.
D)   quasars.
E)   only black holes.

Question 20

How did Harlow Shapley use the period-luminosity relationship of RR Lyrae variables to determine the size of the Milky Way galaxy?

Accepted Answer

A)   He determined the proper motion of globular clusters in the outer disk of the galaxy.
B)   He found the distances to individual variables free floating in the halo.
C)   He found the distances to open clusters found throughout the disk of the galaxy.
D)   He found the distances to globular clusters distributed about the center of the galaxy.

Exam 12: The Milky Way Galaxy

The first stars to form in our galaxy

Correct AnswerverifiedShow Answer

___________ of the Milky Way contains mostly old (population II) stars and globular clusters.

Correct AnswerverifiedShow Answer

What color in the above image best represents the bulge?

Correct AnswerverifiedShow Answer

The Herschels' grindstone model of the Milky Way star system was too small because

Correct AnswerverifiedShow Answer

Compared to stars within the disk, halo stars

Correct AnswerverifiedShow Answer

Spiral tracers tend to be old, luminous stars.

Correct AnswerverifiedShow Answer

The galaxy shown above is ___________.

Correct AnswerverifiedShow Answer

What evidence do we have that the center of our galaxy is a powerful source of energy and a supermassive black hole?

Correct AnswerverifiedA stronomers have been able to use large...View AnswerShow Answer

The orbits of halo stars are typically circular and have a low inclination with respect to the disk.

Correct AnswerverifiedShow Answer

The disk of our galaxy consists of

Correct AnswerverifiedShow Answer

Stars motion within the disk of the Milky Way galaxy are ordered in that they the all go in the same direction, counter-clockwise, as viewed from above (e.g., as viewed from above the north rotational axis of the Sun),

Correct AnswerverifiedShow Answer

How did Harlow Shapley use the period-luminosity relationship of RR Lyrae variables to determine the size of the Milky Way galaxy?

Correct AnswerverifiedShow Answer

The blue color in this visual wavelength image indicates

Correct AnswerverifiedShow Answer

Old stars are poor in heavy elements because there were very few previous generations of stars before the old stars formed.

Correct AnswerverifiedShow Answer

​ Why does the rotation of our galaxy suggest that it is more massive than previously thought?

Correct AnswerverifiedThe best observations of the rotation cu...View AnswerShow Answer

Good tracers of the spiral arms of our galaxy are all I. very old. II. very young. III. very luminous. IV. moving with large radial velocities.

Correct AnswerverifiedShow Answer

​ Compare and contrast the properties of disk and halo stars.

Correct Answerverified​ Most of the stars in the disk are mid...View AnswerShow Answer

Which mass star experiences more pulsations than the others shown at the time the systems were plotted in the above H-R diagram?

Correct AnswerverifiedShow Answer

____________________ are groups of 100,000 to 1,000,000 population II stars firmly bound by gravity.

Correct AnswerverifiedShow Answer

The center of our galaxy is located in the direction of the constellation of Orion.

Correct AnswerverifiedShow Answer

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A stronomers have been able to use large...
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Why does the rotation of our galaxy suggest that it is more massive than previously thought?

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The best observations of the rotation cu...
View Answer

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Compare and contrast the properties of disk and halo stars.

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Most of the stars in the disk are mid...
View Answer

Correct Answer
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