Question 1

The age of the Milky Way galaxy has been estimated to be at least 13 billion years based on

Accepted Answer

A) observations of globular clusters. 
B) observations of open clusters. 
C) 21-cm radiation from H I regions. 
D) the rotation curve of the galaxy. 
E) the energy produced by Sagittarius A*. 
A) observations of globular clusters. 
B) observations of open clusters. 
C) 21-cm radiation from H I regions. 
D) the rotation curve of the galaxy. 
E) the energy produced by Sagittarius A*.

Question 2

The chemical abundance of population I stars

Accepted Answer

A) indicates that they were formed before the population II stars. 
B) indicates that the material they formed from had been enriched with material from supernovae. 
C) indicates that they contain very few heavy metals compared to halo stars. 
D) depends on the temperature of the star. 
E) depends on the mass of the star. 
A) indicates that they were formed before the population II stars. 
B) indicates that the material they formed from had been enriched with material from supernovae. 
C) indicates that they contain very few heavy metals compared to halo stars. 
D) depends on the temperature of the star. 
E) depends on the mass of the star.

Question 3

The Sun is at the center of the Milky Way galaxy.

Accepted Answer

A) True 
 B)False

Question 4

The pink color in the following visual image is from __________.

Accepted Answer

A) a reflection nebula 
B) a dark nebula 
C) an emission nebula 
D) pink stars 
A) a reflection nebula 
B) a dark nebula 
C) an emission nebula 
D) pink stars

Question 5

Our galaxy is suspected to be surrounded by a galactic halo or corona because the disk of the galaxy

Accepted Answer

A) rotates faster than expected in its outer region. 
B) rotates more slowly than expected in its outer region. 
C) is only visible during a total eclipse of our Sun. 
D) is surrounded above, below, and well beyond by the brightly glowing corona. 
A) rotates faster than expected in its outer region. 
B) rotates more slowly than expected in its outer region. 
C) is only visible during a total eclipse of our Sun. 
D) is surrounded above, below, and well beyond by the brightly glowing corona.

Question 6

Henrietta Leavitt discovered the period-luminosity relationship for ____________________.

Accepted Answer

The answer of Henrietta Leavitt discovered the period-luminosity relationship for...

Question 7

The units of proper motion are km/s because proper motion is the motion of stars across the sky.

Accepted Answer

A) True 
 B)False

Question 8

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. 
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 9

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

Question 10

The center of the Milky Way galaxy must be less than 1 AU in diameter and contain at least 4 million solar masses. Therefore, the center of the Milky Way galaxy must be a ____________________,

Accepted Answer

supermassi

Question 11

The production of elements heavier than helium by fusion in stars and during supernova explosions is called ______________________.

Accepted Answer

The answer of The production of elements heavier than helium...

Question 12

Figure 12-1
  
-Refer to Figure 12-1. A Type II Cepheid has been located in a distant globular cluster with a period of 10 days. What is the star's absolute magnitude

Accepted Answer

A) −1 
B) 0 
C) −4 
D) −6 
E) The absolute magnitude of a Cepheid variable cannot be determined unless its distance is known. 
A) −1 
B) 0 
C) −4 
D) −6 
E) The absolute magnitude of a Cepheid variable cannot be determined unless its distance is known.

Question 13

The pink color tracing the spiral arms are from emission nebulae.

Accepted Answer

A) True 
 B)False

Question 14

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 15

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

Accepted Answer

A) edge-on 
B) face-on 
C) nearly edge-on 
D) None of the other choices are correct. 
A) edge-on 
B) face-on 
C) nearly edge-on 
D) None of the other choices are correct.

Question 16

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 17

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 other choices are correct. 
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 other choices are correct.

Question 18

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

Question 19

Why are all spiral tracers young

Accepted Answer

Spiral tracers are young objects, formed

Question 20

Which of the following can't be associated with the spiral arms of a galaxy

Accepted Answer

A) dust and gas 
B) metal-poor stars 
C) young, massive stars 
D) star formation 
A) dust and gas 
B) metal-poor stars 
C) young, massive stars 
D) star formation

The age of the Milky Way galaxy has been estimated to be at least 13 billion years based on

The chemical abundance of population I stars

The Sun is at the center of the Milky Way galaxy.

The pink color in the following visual image is from __________.

Our galaxy is suspected to be surrounded by a galactic halo or corona because the disk of the galaxy

Henrietta Leavitt discovered the period-luminosity relationship for ____________________.

The units of proper motion are km/s because proper motion is the motion of stars across the sky.

Nucleosynthesis

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

The center of the Milky Way galaxy must be less than 1 AU in diameter and contain at least 4 million solar masses. Therefore, the center of the Milky Way galaxy must be a ____________________,

The production of elements heavier than helium by fusion in stars and during supernova explosions is called ______________________.

Figure 12-1 -Refer to Figure 12-1. A Type II Cepheid has been located in a distant globular cluster with a period of 10 days. What is the star's absolute magnitude

The pink color tracing the spiral arms are from emission nebulae.

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

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

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),

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

-The galaxy shown above is ___________.

Why are all spiral tracers young

Which of the following can't be associated with the spiral arms of a galaxy

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

Exam 12: The Milky Way Galaxy

The age of the Milky Way galaxy has been estimated to be at least 13 billion years based on

The chemical abundance of population I stars

The Sun is at the center of the Milky Way galaxy.

The pink color in the following visual image is from __________.

Our galaxy is suspected to be surrounded by a galactic halo or corona because the disk of the galaxy

Henrietta Leavitt discovered the period-luminosity relationship for ____________________.

The units of proper motion are km/s because proper motion is the motion of stars across the sky.

Nucleosynthesis

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

The center of the Milky Way galaxy must be less than 1 AU in diameter and contain at least 4 million solar masses. Therefore, the center of the Milky Way galaxy must be a ____________________,

The production of elements heavier than helium by fusion in stars and during supernova explosions is called ______________________.

Figure 12-1 -Refer to Figure 12-1. A Type II Cepheid has been located in a distant globular cluster with a period of 10 days. What is the star's absolute magnitude

The pink color tracing the spiral arms are from emission nebulae.

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

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

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),

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

-The galaxy shown above is ___________.

Why are all spiral tracers young

Which of the following can't be associated with the spiral arms of a galaxy

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