Question 1

Who was Henrietta Leavitt, and what did she do to help map the universe?

Accepted Answer

This Harvard astronomer found the period

Question 2

Which of these is NOT typical of the Galaxy's spiral arms?

Accepted Answer

A)  Hot, young blue stars 
B)  Emission nebulae like M42 
C)  O and B stars 
D)  Open clusters 
E)  Old giant stars like orange Arcturus 
A)  Hot, young blue stars 
B)  Emission nebulae like M42 
C)  O and B stars 
D)  Open clusters 
E)  Old giant stars like orange Arcturus

Question 3

In our vicinity, the Galactic disk is about 100 times wider than it is thick.

Accepted Answer

A) True 
 B)False

Question 4

Star formation ceased first in the

Accepted Answer

A)  nucleus. 
B)  spiral arms. 
C)  bulge. 
D)  halo. 
E)  Galactic disk. 
A)  nucleus. 
B)  spiral arms. 
C)  bulge. 
D)  halo. 
E)  Galactic disk.

Question 5

From the Sun, the distance to the Galactic center is about

Accepted Answer

A)  8 pc. 
B)  8,000 pc. 
C)  100,000 pc. 
D)  225 million pc. 
E)  100 billion pc. 
A)  8 pc. 
B)  8,000 pc. 
C)  100,000 pc. 
D)  225 million pc. 
E)  100 billion pc.

Question 6

Stars in the Galactic disk came billions of years before stars in the Galactic halo.

Accepted Answer

A) True 
 B)False

Question 7

In structure, our Milky Way is most similar to

Accepted Answer

A)  the Large Magellanic Cloud. 
B)  an upscale version of a globular cluster. 
C)  M-31, the Andromeda Galaxy. 
D)  the Orion nebula. 
E)  none of these. 
A)  the Large Magellanic Cloud. 
B)  an upscale version of a globular cluster. 
C)  M-31, the Andromeda Galaxy. 
D)  the Orion nebula. 
E)  none of these.

Question 8

Galactic disks appear blue because

Accepted Answer

A)  they contain no G, K, or M dwarfs. 
B)  they contain only blue reflection nebulae. 
C)  dust obscures the longer, red, wavelengths. 
D)  O and B blue giants are much brighter than G, K, or M dwarfs. 
E)  dark matter gravitationally shifts all wavelengths towards the blue. 
A)  they contain no G, K, or M dwarfs. 
B)  they contain only blue reflection nebulae. 
C)  dust obscures the longer, red, wavelengths. 
D)  O and B blue giants are much brighter than G, K, or M dwarfs. 
E)  dark matter gravitationally shifts all wavelengths towards the blue.

Question 9

The orbits of halo and bulge stars have been compared to

Accepted Answer

A)  planets around the Sun. 
B)  satellites around planets. 
C)  comets around the Sun. 
D)  binary stars. 
E)  the accretion disc around a black hole. 
A)  planets around the Sun. 
B)  satellites around planets. 
C)  comets around the Sun. 
D)  binary stars. 
E)  the accretion disc around a black hole.

Question 10

The location of the Galactic center was first found by Harlow Shapley with

Accepted Answer

A)  radio emissions from Sagittarius A. 
B)  Cepheids of population I in the spiral arms. 
C)  RR Lyrae variables in the globular clusters. 
D)  planetary nebulae in the open clusters. 
E)  infrared observations of the heat from its accretion disk around the black hole. 
A)  radio emissions from Sagittarius A. 
B)  Cepheids of population I in the spiral arms. 
C)  RR Lyrae variables in the globular clusters. 
D)  planetary nebulae in the open clusters. 
E)  infrared observations of the heat from its accretion disk around the black hole.

Question 11

Our solar system is in the Galactic ________ of the Milky Way Galaxy.

Accepted Answer

The answer of Our solar system is in the Galactic...

Question 12

The infall of material in the Galactic halo to the Galactic disk stopped shortly after the formation of globular clusters.

Accepted Answer

A) True 
 B)False

Question 13

Which sequence of formation by age is correct, oldest to youngest?

Accepted Answer

A)  Dark nebulae, planetary nebulae, emission nebulae 
B)  Spiral arms, bulge, halo 
C)  Halo, spiral arms, globular clusters 
D)  Globular clusters, emission nebulae, open clusters 
A)  Dark nebulae, planetary nebulae, emission nebulae 
B)  Spiral arms, bulge, halo 
C)  Halo, spiral arms, globular clusters 
D)  Globular clusters, emission nebulae, open clusters

Question 14

Harlow Shapley found the Milky Way was

Accepted Answer

A)  centered on the Earth. 
B)  much smaller than previously thought. 
C)  rapidly expanding. 
D)  much larger than previously thought. 
E)  uniformly spherical in shape. 
A)  centered on the Earth. 
B)  much smaller than previously thought. 
C)  rapidly expanding. 
D)  much larger than previously thought. 
E)  uniformly spherical in shape.

Question 15

The period-luminosity relation for Cepheid variables was discovered in 1908 by

Accepted Answer

A)  William Herschel. 
B)  Henrietta Leavitt. 
C)  Harlow Shapley. 
D)  Heber Curtiss. 
E)  Edwin Hubble. 
A)  William Herschel. 
B)  Henrietta Leavitt. 
C)  Harlow Shapley. 
D)  Heber Curtiss. 
E)  Edwin Hubble.

Question 16

Of what is the Galactic halo presumed to be composed? What evidence supports this conclusion?

Accepted Answer

The globular clusters are most obvious,

Question 17

Who discovered the period-luminosity relationship, and why was it so critical?

Accepted Answer

Henrietta Leavitt discovered the period-

Question 18

The leading explanation for the existence of spiral arms is

Accepted Answer

A)  shock waves from cyclic supernovae explosions. 
B)  shock wave from the quasar-like eruption of the Galactic core. 
C)  passages of spiral density waves through the interstellar medium. 
D)  passages of massive globular clusters through the Galactic plane. 
E)  tidal streams of small galaxies being torn up by our monster Galaxy. 
A)  shock waves from cyclic supernovae explosions. 
B)  shock wave from the quasar-like eruption of the Galactic core. 
C)  passages of spiral density waves through the interstellar medium. 
D)  passages of massive globular clusters through the Galactic plane. 
E)  tidal streams of small galaxies being torn up by our monster Galaxy.

Question 19

Density waves may explain

Accepted Answer

A)  the lack of blue stars in the halo. 
B)  the random orbits of halo stars. 
C)  the density of red stars in the bulge. 
D)  the spiral arm structure of the Galaxy. 
E)  the large number of open clusters in the halo. 
A)  the lack of blue stars in the halo. 
B)  the random orbits of halo stars. 
C)  the density of red stars in the bulge. 
D)  the spiral arm structure of the Galaxy. 
E)  the large number of open clusters in the halo.

Question 20

Our Milky Way Galaxy is now known to be quite similar to the nearby Andromeda Galaxy, M-31.

Accepted Answer

A) True 
 B)False

Who was Henrietta Leavitt, and what did she do to help map the universe?

Which of these is NOT typical of the Galaxy's spiral arms?

In our vicinity, the Galactic disk is about 100 times wider than it is thick.

Star formation ceased first in the

From the Sun, the distance to the Galactic center is about

Stars in the Galactic disk came billions of years before stars in the Galactic halo.

In structure, our Milky Way is most similar to

Galactic disks appear blue because

The orbits of halo and bulge stars have been compared to

The location of the Galactic center was first found by Harlow Shapley with

Our solar system is in the Galactic ________ of the Milky Way Galaxy.

The infall of material in the Galactic halo to the Galactic disk stopped shortly after the formation of globular clusters.

Which sequence of formation by age is correct, oldest to youngest?

Harlow Shapley found the Milky Way was

The period-luminosity relation for Cepheid variables was discovered in 1908 by

Of what is the Galactic halo presumed to be composed? What evidence supports this conclusion?

Who discovered the period-luminosity relationship, and why was it so critical?

The leading explanation for the existence of spiral arms is

Density waves may explain

Our Milky Way Galaxy is now known to be quite similar to the nearby Andromeda Galaxy, M-31.

The Night Sky

Light and Telescopes

The Solar System

Earth and Its Moon

The Eight Planets

Small Bodies in the Solar System

Formation of Planetary Systems

The Sun

Measuring the Stars

Star Formation and Evolution

Stellar Explosions

Black Holes

Galaxies

Cosmology and the Universe

Filters

Exam 13: The Milky Way Galaxy

Who was Henrietta Leavitt, and what did she do to help map the universe?

Which of these is NOT typical of the Galaxy's spiral arms?

In our vicinity, the Galactic disk is about 100 times wider than it is thick.

Star formation ceased first in the

From the Sun, the distance to the Galactic center is about

Stars in the Galactic disk came billions of years before stars in the Galactic halo.

In structure, our Milky Way is most similar to

Galactic disks appear blue because

The orbits of halo and bulge stars have been compared to

The location of the Galactic center was first found by Harlow Shapley with

Our solar system is in the Galactic ________ of the Milky Way Galaxy.

The infall of material in the Galactic halo to the Galactic disk stopped shortly after the formation of globular clusters.

Which sequence of formation by age is correct, oldest to youngest?

Harlow Shapley found the Milky Way was

The period-luminosity relation for Cepheid variables was discovered in 1908 by

Of what is the Galactic halo presumed to be composed? What evidence supports this conclusion?

Who discovered the period-luminosity relationship, and why was it so critical?

The leading explanation for the existence of spiral arms is

Density waves may explain

Our Milky Way Galaxy is now known to be quite similar to the nearby Andromeda Galaxy, M-31.

The Night Sky

Light and Telescopes

The Solar System

Earth and Its Moon

The Eight Planets

Small Bodies in the Solar System

Formation of Planetary Systems

The Sun

Measuring the Stars

Star Formation and Evolution

Stellar Explosions

Black Holes

Galaxies

Cosmology and the Universe

Filters