Question 1

The Milky Way galaxy is an example of a grand-design galaxy.

Accepted Answer

A) True 
 B)False

Question 2

The energy source at the center of our galaxy

Accepted Answer

A) is not visible at optical wavelengths. 
B) produces X-rays. 
C) must be less than 10 AU in diameter. 
D) is not visible at optical wavelengths, produces X-rays, and must be less than 10 AU in diameter. 
E) None of the other choices are correct. 
A) is not visible at optical wavelengths. 
B) produces X-rays. 
C) must be less than 10 AU in diameter. 
D) is not visible at optical wavelengths, produces X-rays, and must be less than 10 AU in diameter. 
E) None of the other choices are correct.

Question 3

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. 
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.

Question 4

Spiral tracers tend to be old, luminous stars.

Accepted Answer

A) True 
 B)False

Question 5

Figure 12-1
  
-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 
A) 100 pc 
B) 10,000 pc 
C) 20 pc 
D) 300 pc 
E) 2500 pc

Question 6

-What is the orientation of the galaxy shown above relative to Earth

Accepted Answer

A) face-on 
B) edge-on 
C) not quite edge-on 
D) not quite face-on 
A) face-on 
B) edge-on 
C) not quite edge-on 
D) not quite face-on

Question 7

Why does the average chemical composition of stars now forming differ from that of older stars

Accepted Answer

The first stars formed from gas that was

Question 8

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

Accepted Answer

Shapley began his research on the star s

Question 9

Where are the Large Magellanic Cloud and Small Magellanic Cloud located

Accepted Answer

A) in the spiral arms 
B) in the disk 
C) in the bulge 
D) None of the other choices are correct. 
A) in the spiral arms 
B) in the disk 
C) in the bulge 
D) None of the other choices are correct.

Question 10

The rapid rotation in the outer disk suggests that our galaxy is more massive than previously thought.

Accepted Answer

A) True 
 B)False

Question 11

Which of the following is not a characteristic of the stars of the disk component of our galaxy

Accepted Answer

A) circular orbits 
B) randomly inclined orbits 
C) higher metal abundance 
D) young stars 
E) star-formation regions 
A) circular orbits 
B) randomly inclined orbits 
C) higher metal abundance 
D) young stars 
E) star-formation regions

Question 12

How is the age of the galaxy determined

Accepted Answer

A) measuring the metallicity of Population II stars 
B) finding the turnoff point in the H-R diagram of globular clusters 
C) from the motion of stars in the galactic halo 
D) counting the number of open clusters in the spiral arms 
A) measuring the metallicity of Population II stars 
B) finding the turnoff point in the H-R diagram of globular clusters 
C) from the motion of stars in the galactic halo 
D) counting the number of open clusters in the spiral arms

Question 13

What is the difference between a population I star and a population II star

Accepted Answer

Population I stars are metal rich, conta

Question 14

Who first determined that the energy/s emitted by (luminosity of) Cepheid variable stars is larger the longer their period of variation is

Accepted Answer

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

Question 15

The above light curve shows a period that indicates ________________________.

Accepted Answer

A) the star gets dimmer quickly and brighter gradually 
B) the star gets brighter quickly and dimmer gradually 
C) the binary star system has an elliptical orbit 
D) the system remains at constant absolute magnitude 
A) the star gets dimmer quickly and brighter gradually 
B) the star gets brighter quickly and dimmer gradually 
C) the binary star system has an elliptical orbit 
D) the system remains at constant absolute magnitude

Question 16

Why are Cepheid variable stars important in our study of the Milky Way galaxy

Accepted Answer

They can be used to calibrate

Question 17

The disk of the galaxy is older than the halo.

Accepted Answer

A) True 
 B)False

The Milky Way galaxy is an example of a grand-design galaxy.

The energy source at the center of our galaxy

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

Spiral tracers tend to be old, luminous stars.

-What is the orientation of the galaxy shown above relative to Earth

Why does the average chemical composition of stars now forming differ from that of older stars

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

Where are the Large Magellanic Cloud and Small Magellanic Cloud located

The rapid rotation in the outer disk suggests that our galaxy is more massive than previously thought.

Which of the following is not a characteristic of the stars of the disk component of our galaxy

How is the age of the galaxy determined

What is the difference between a population I star and a population II star

Who first determined that the energy/s emitted by (luminosity of) Cepheid variable stars is larger the longer their period of variation is

The above light curve shows a period that indicates ________________________.

Why are Cepheid variable stars important in our study of the Milky Way galaxy

The disk of the galaxy is older than the halo.

Here and Now

A Users Guide to the Sky

Cycles of the Sun and Moon

The Origin of Modern Astronomy

Light and Telescopes

Atoms and Spectra

The Sun

The Family of Stars

The Formation and Structure of Stars

The Deaths of Stars

Neutron Stars and Black Holes

Galaxies: Normal and Active

Modern Cosmology

The Origin of the Solar System

Earth and Moon: Bases for Comparative Planetology

Mercury, Venus, and Mars

The Outer Solar System

Meteorites, Asteroids, and Comets

Astrobiology: Life on Other Worlds

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Exam 12: The Milky Way Galaxy

The Milky Way galaxy is an example of a grand-design galaxy.

The energy source at the center of our galaxy

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

Spiral tracers tend to be old, luminous stars.

-What is the orientation of the galaxy shown above relative to Earth

Why does the average chemical composition of stars now forming differ from that of older stars

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

Where are the Large Magellanic Cloud and Small Magellanic Cloud located

The rapid rotation in the outer disk suggests that our galaxy is more massive than previously thought.

Which of the following is not a characteristic of the stars of the disk component of our galaxy

How is the age of the galaxy determined

What is the difference between a population I star and a population II star

Who first determined that the energy/s emitted by (luminosity of) Cepheid variable stars is larger the longer their period of variation is

The above light curve shows a period that indicates ________________________.

Why are Cepheid variable stars important in our study of the Milky Way galaxy

The disk of the galaxy is older than the halo.

Here and Now

A Users Guide to the Sky

Cycles of the Sun and Moon

The Origin of Modern Astronomy

Light and Telescopes

Atoms and Spectra

The Sun

The Family of Stars

The Formation and Structure of Stars

The Deaths of Stars

Neutron Stars and Black Holes

Galaxies: Normal and Active

Modern Cosmology

The Origin of the Solar System

Earth and Moon: Bases for Comparative Planetology

Mercury, Venus, and Mars

The Outer Solar System

Meteorites, Asteroids, and Comets

Astrobiology: Life on Other Worlds

Filters