Question 1

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

Accepted Answer

A) True 
 B)False

Question 2

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

Question 3

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

Question 4

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 5

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

Accepted Answer

​ 
Most of the stars in the disk are mid

Question 6

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. 
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 7

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

Question 8

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. 
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 9

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 10

The blue color in this visual wavelength image indicates

Accepted Answer

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

Question 11

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 12

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 13

Spiral tracers tend to be old, luminous stars.

Accepted Answer

A) True 
 B)False

Question 14

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. 
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 15

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 16

​ 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 17

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 18

____________________ 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 19

What color in the above image best represents the bulge?

Accepted Answer

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

Question 20

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

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

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

The disk of our galaxy consists of

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

Compare and contrast the properties of disk and halo stars.

Compared to stars within the disk, halo stars

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.

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

The galaxy shown above is ___________.

The blue color in this visual wavelength image indicates

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

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),

Spiral tracers tend to be old, luminous stars.

The first stars to form in our galaxy

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

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

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

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

What color in the above image best represents the bulge?

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

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

Origin of the Solar System and Extrasolar Planets

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

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

The disk of our galaxy consists of

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

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

Compared to stars within the disk, halo stars

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.

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

The galaxy shown above is ___________.

The blue color in this visual wavelength image indicates

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

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),

Spiral tracers tend to be old, luminous stars.

The first stars to form in our galaxy

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

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

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

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

What color in the above image best represents the bulge?

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

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

Origin of the Solar System and Extrasolar Planets

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

Compare and contrast the properties of disk and halo stars.

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