Question 1

In the diagram below, the approximate absolute magnitude of a Type II Cepheid with a period of 30 days is ____________________.

Accepted Answer

The answer of In the diagram below, the approximate absolute...

Question 2

Why are all spiral tracers young?

Accepted Answer

The answer of Why are all spiral tracers young?...

Question 3

Pulsating variable stars are useful in determining

Accepted Answer

A)   the mass of a star for which the distance is known.
B)   the temperature of a star for which we know the luminosity.
C)   the radius of the bulge of our galaxy.
D)   the distance to globular clusters.
E)   the mass of the Milky Way galaxy.

Question 4

Spiral tracers tend to be old, luminous stars.

Accepted Answer

A) True 
 B)False

Question 5

Discuss how Harlow Shapley determined the structure of the Milky Way galaxy from his study of globular clusters.

Accepted Answer

The answer of Discuss how Harlow Shapley determined the structure...

Question 6

The traditional "top-down" hypothesis of the formation of our galaxy cannot explain

Accepted Answer

A)   why not all globular clusters are the same age.
B)   why the youngest globular clusters are in the outer halo.
C)   why the oldest stars are metal poor but not completely metal free.
D)   streams and rings of scattered stars in the halo.
E)   all of the above.

Question 7

What is the difference between an open cluster, an association, and a globular cluster? In which components of the galaxy does each lie?

Accepted Answer

Open clusters, also known as galactic cl...

Question 8

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 9

Who first used RR Lyrae variable stars to determine distances in our Milky Way Galaxy?

Accepted Answer

A)   Henrietta Leavitt
B)   Edwin Hubble
C)   John Glenn
D)   Carl Sagan
E)   Harlow Shapley

Question 10

____________________ 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 11

Nucleosynthesis

Accepted Answer

A)   is the process by which energy is produced at the center of the galaxy.
B)   is the process by which hydrogen and helium are converted into heavier elements.
C)   describes the structure of a globular cluster.
D)   describes how the magnetic field of the galaxy traps cosmic rays.
E)   describes the method by which neutral hydrogen produces 21-cm radiation.

Question 12

Figure 12-1 pc = 10(m - M + 5) /5  A)  100 pc B)  10,000 pc C)  20 pc D)  300 pc E)  2500 pc" class="answers-bank-image d-inline" rel="preload" >
-Refer to Figure 12-1. A Type I Cepheid has been located in an open cluster. The period of the Cepheid variable is 30 days and the variables apparent visual magnitude, m, is 10. First, use 12-1 to estimate the absolute visual magnitude, M . Calculate the distance to this open cluster? Hint: dpc = 10(m - M + 5) /5

Accepted Answer

A)   100 pc
B)   10,000 pc
C)   20 pc
D)   300 pc
E)   2500 pc

Question 13

The rotation curve of the galaxy provides evidence for the existence of the ____________________ which extends beyond the halo of the galaxy.

Accepted Answer

The answer of The rotation curve of the galaxy provides...

Question 14

Giant molecular cloud complexes are located in spiral arms.

Accepted Answer

A) True 
 B)False

Question 15

The center of our galaxy lies in the direction of the constellation of

Accepted Answer

A)   Ursa Minor.
B)   Ursa Major.
C)   Sagittarius.
D)   Orion.
E)   Monoceros.

Question 16

Radio maps of our galaxy show spiral arms because

Accepted Answer

A)   the arms have larger Doppler shifts.
B)   the gas in the spiral arms is very hot.
C)   the dust in spiral arms is denser.
D)   the gas in spiral arms is denser.
E)   the stars in the spiral arms emit most of their energy at radio wavelengths.

Question 17

Shapley found the distance to the center of the galaxy by studying the distance to open clusters.

Accepted Answer

A) True 
 B)False

Question 18

Describe the central 25 pc of our galaxy.

Accepted Answer

The central 25 pc of our galaxy, the Mil...

Question 19

In the edge-on sketch of a spiral galaxy, pick the letter corresponding most nearly to the location of globular clusters.

Accepted Answer

A)   A
B)   B
C)   C
D)   D

Question 20

The center of our galaxy lies in the direction of (but far beyond)  the stars in the constellation of

Accepted Answer

A)   Ursa Minor.
B)   Ursa Major.
C)   Sagittarius.
D)   Orion.
E)   Monoceros.

Exam 12: The Milky Way Galaxy

Who first used RR Lyrae variable stars to determine distances in our Milky Way Galaxy?

Correct Answer
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Pulsating variable stars are useful in determining

Correct Answer
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Describe the central 25 pc of our galaxy.

Correct Answer
Answered by ExamLex AI
The central 25 pc of our galaxy, the Mil...
View Answer

In the edge-on sketch of a spiral galaxy, pick the letter corresponding most nearly to the location of globular clusters.

Correct Answer
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What is the difference between an open cluster, an association, and a globular cluster? In which components of the galaxy does each lie?

Correct Answer
Answered by ExamLex AI
Open clusters, also known as galactic cl...
View Answer

Spiral tracers tend to be old, luminous stars.

Correct Answer
verified

Correct Answer
verified

Shapley found the distance to the center of the galaxy by studying the distance to open clusters.

Correct Answer
verified

The center of our galaxy lies in the direction of the constellation of

Correct Answer
verified

The rotation curve of the galaxy provides evidence for the existence of the ____________________ which extends beyond the halo of the galaxy.

Correct Answer
verified

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

Correct Answer
verified

Giant molecular cloud complexes are located in spiral arms.

Correct Answer
verified

Nucleosynthesis

Correct Answer
verified

The traditional "top-down" hypothesis of the formation of our galaxy cannot explain

Correct Answer
verified

Discuss how Harlow Shapley determined the structure of the Milky Way galaxy from his study of globular clusters.

Correct Answer
verified

Radio maps of our galaxy show spiral arms because

Correct Answer
verified

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

Correct Answer
verified

Why are all spiral tracers young?

Correct Answer
verified

In the diagram below, the approximate absolute magnitude of a Type II Cepheid with a period of 30 days is ____________________.

Correct Answer
verified

The center of our galaxy lies in the direction of (but far beyond) the stars in the constellation of

Correct Answer
verified

Exam 12: The Milky Way Galaxy

Who first used RR Lyrae variable stars to determine distances in our Milky Way Galaxy?

Correct AnswerverifiedShow Answer

Pulsating variable stars are useful in determining

Correct AnswerverifiedShow Answer

Describe the central 25 pc of our galaxy.

Correct AnswerAnswered by ExamLex AIThe central 25 pc of our galaxy, the Mil...View AnswerShow Answer

In the edge-on sketch of a spiral galaxy, pick the letter corresponding most nearly to the location of globular clusters.

Correct AnswerverifiedShow Answer

What is the difference between an open cluster, an association, and a globular cluster? In which components of the galaxy does each lie?

Correct AnswerAnswered by ExamLex AIOpen clusters, also known as galactic cl...View AnswerShow Answer

Spiral tracers tend to be old, luminous stars.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Shapley found the distance to the center of the galaxy by studying the distance to open clusters.

Correct AnswerverifiedShow Answer

The center of our galaxy lies in the direction of the constellation of

Correct AnswerverifiedShow Answer

The rotation curve of the galaxy provides evidence for the existence of the ____________________ which extends beyond the halo of the galaxy.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Giant molecular cloud complexes are located in spiral arms.

Correct AnswerverifiedShow Answer

Nucleosynthesis

Correct AnswerverifiedShow Answer

The traditional "top-down" hypothesis of the formation of our galaxy cannot explain

Correct AnswerverifiedShow Answer

Discuss how Harlow Shapley determined the structure of the Milky Way galaxy from his study of globular clusters.

Correct AnswerverifiedShow Answer

Radio maps of our galaxy show spiral arms because

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 are all spiral tracers young?

Correct AnswerverifiedShow Answer

In the diagram below, the approximate absolute magnitude of a Type II Cepheid with a period of 30 days is ____________________.

Correct AnswerverifiedShow Answer

The center of our galaxy lies in the direction of (but far beyond) the stars in the constellation of

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
Answered by ExamLex AI
The central 25 pc of our galaxy, the Mil...
View Answer

Correct Answer
verified

Correct Answer
Answered by ExamLex AI
Open clusters, also known as galactic cl...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
verified

Correct Answer
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