Question 1

The energy radiated by a typical quasar requires that its black hole accrete about

Accepted Answer

A)  one solar mass a century. 
B)  one solar mass a decade. 
C)  one solar mass a year. 
D)  ten solar masses a year. 
E)  one solar mass a day. 
A)  one solar mass a century. 
B)  one solar mass a decade. 
C)  one solar mass a year. 
D)  ten solar masses a year. 
E)  one solar mass a day.

Question 2

It is now believed the majority of mass for most galaxies lies in their dark halos.

Accepted Answer

A) True 
 B)False

Question 3

Whether or NOT we see radio lobes from radio galaxies depends on their ________ relative to our line of sight.

Accepted Answer

The answer of Whether or NOT we see radio lobes...

Question 4

From studies of the masses of individual galaxies and the masses of clusters of galaxies, it is now apparent that up to ________ of the universe is composed of dark matter.

Accepted Answer

The answer of From studies of the masses of individual...

Question 5

Giant elliptical galaxies may be the result of ________ in the centers of rich clusters.

Accepted Answer

galaxy mer

Question 6

To which portion of the Milky Way are the Magellanic Clouds most similar? Why?

Accepted Answer

Like our spiral arms

Question 7

Quasars can emit as much as thousands of times as much energy as normal galaxies.

Accepted Answer

A) True 
 B)False

Question 8

The Magellanic Clouds are good examples of the ________ type of galaxy.

Accepted Answer

The answer of The Magellanic Clouds are good examples of...

Question 9

Based on galactic rotation curves and cluster dynamics, we think dark matter

Accepted Answer

A)  is a minor component of the entire mass of the universe. 
B)  is best detected from the X-rays it produces in the intergalactic medium. 
C)  will have no effect on the fate of the universe. 
D)  comprises over 90% of the entire mass of the universe. 
E)  will doom the universe to collapse, overcoming the red shifts we now observe. 
A)  is a minor component of the entire mass of the universe. 
B)  is best detected from the X-rays it produces in the intergalactic medium. 
C)  will have no effect on the fate of the universe. 
D)  comprises over 90% of the entire mass of the universe. 
E)  will doom the universe to collapse, overcoming the red shifts we now observe.

Question 10

Our galaxy, the Andromeda Galaxy, and about 40 smaller galaxies are members of ________.

Accepted Answer

The answer of Our galaxy, the Andromeda Galaxy, and about...

Question 11

Why would spiral galaxies be less common now than in the early universe?

Accepted Answer

As galaxies collide they chang

Question 12

Some lobes of radio galaxies are in fact moving faster than the speed of light.

Accepted Answer

A) True 
 B)False

Question 13

The magnetic fields carried by jets coming from active galactic nuclei are generated by

Accepted Answer

A)  the combined magnetic fields of the many stars near the galaxy's center. 
B)  the central black hole. 
C)  the movement of the interstellar matter of the galaxy. 
D)  the movement of the stars in the galaxy. 
E)  charged matter in the accretion disk of the central black hole. 
A)  the combined magnetic fields of the many stars near the galaxy's center. 
B)  the central black hole. 
C)  the movement of the interstellar matter of the galaxy. 
D)  the movement of the stars in the galaxy. 
E)  charged matter in the accretion disk of the central black hole.

Question 14

When two galaxies move very closely to each other, their ________ may dramatically rearrange their visible structures.

Accepted Answer

gravitatio

Question 15

The expansion of the universe means that stars in our Milky Way Galaxy are getting increasingly farther apart.

Accepted Answer

A) True 
 B)False

Question 16

Collisions between galaxies is thought to

Accepted Answer

A)  have stopped about 5 billion years ago. 
B)  be commonplace. 
C)  have never occurred. 
D)  be extremely rare. 
E)  have only occurred between 10 and 15 billion years ago. 
A)  have stopped about 5 billion years ago. 
B)  be commonplace. 
C)  have never occurred. 
D)  be extremely rare. 
E)  have only occurred between 10 and 15 billion years ago.

Question 17

The elliptical galaxies are most like what part of our Milky Way? Explain.

Accepted Answer

They are "all halo", with only

Question 18

As we look at larger and larger scales in the universe, we find

Accepted Answer

A)  smaller and smaller masses. 
B)  almost exclusively visible matter. 
C)  a larger and larger percentage of the matter is visible. 
D)  a larger and larger percentage of the matter is dark. 
E)  an equal amount of visible and dark matter. 
A)  smaller and smaller masses. 
B)  almost exclusively visible matter. 
C)  a larger and larger percentage of the matter is visible. 
D)  a larger and larger percentage of the matter is dark. 
E)  an equal amount of visible and dark matter.

Question 19

What lines of evidence show that the Milky Way Galaxy is indeed a spiral galaxy?

Accepted Answer

The plane of the disk is obscured by dus

Question 20

What type of galaxy are the two Magellanic Clouds? How do we know this visually?

Accepted Answer

Both are irregular galaxies, w

The energy radiated by a typical quasar requires that its black hole accrete about

It is now believed the majority of mass for most galaxies lies in their dark halos.

Whether or NOT we see radio lobes from radio galaxies depends on their ________ relative to our line of sight.

From studies of the masses of individual galaxies and the masses of clusters of galaxies, it is now apparent that up to ________ of the universe is composed of dark matter.

Giant elliptical galaxies may be the result of ________ in the centers of rich clusters.

To which portion of the Milky Way are the Magellanic Clouds most similar? Why?

Quasars can emit as much as thousands of times as much energy as normal galaxies.

The Magellanic Clouds are good examples of the ________ type of galaxy.

Based on galactic rotation curves and cluster dynamics, we think dark matter

Our galaxy, the Andromeda Galaxy, and about 40 smaller galaxies are members of ________.

Why would spiral galaxies be less common now than in the early universe?

Some lobes of radio galaxies are in fact moving faster than the speed of light.

The magnetic fields carried by jets coming from active galactic nuclei are generated by

When two galaxies move very closely to each other, their ________ may dramatically rearrange their visible structures.

The expansion of the universe means that stars in our Milky Way Galaxy are getting increasingly farther apart.

Collisions between galaxies is thought to

The elliptical galaxies are most like what part of our Milky Way? Explain.

As we look at larger and larger scales in the universe, we find

What lines of evidence show that the Milky Way Galaxy is indeed a spiral galaxy?

What type of galaxy are the two Magellanic Clouds? How do we know this visually?

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

The Milky Way Galaxy

Cosmology and the Universe

Filters

Exam 14: Galaxies

The energy radiated by a typical quasar requires that its black hole accrete about

It is now believed the majority of mass for most galaxies lies in their dark halos.

Whether or NOT we see radio lobes from radio galaxies depends on their ________ relative to our line of sight.

From studies of the masses of individual galaxies and the masses of clusters of galaxies, it is now apparent that up to ________ of the universe is composed of dark matter.

Giant elliptical galaxies may be the result of ________ in the centers of rich clusters.

To which portion of the Milky Way are the Magellanic Clouds most similar? Why?

Quasars can emit as much as thousands of times as much energy as normal galaxies.

The Magellanic Clouds are good examples of the ________ type of galaxy.

Based on galactic rotation curves and cluster dynamics, we think dark matter

Our galaxy, the Andromeda Galaxy, and about 40 smaller galaxies are members of ________.

Why would spiral galaxies be less common now than in the early universe?

Some lobes of radio galaxies are in fact moving faster than the speed of light.

The magnetic fields carried by jets coming from active galactic nuclei are generated by

When two galaxies move very closely to each other, their ________ may dramatically rearrange their visible structures.

The expansion of the universe means that stars in our Milky Way Galaxy are getting increasingly farther apart.

Collisions between galaxies is thought to

The elliptical galaxies are most like what part of our Milky Way? Explain.

As we look at larger and larger scales in the universe, we find

What lines of evidence show that the Milky Way Galaxy is indeed a spiral galaxy?

What type of galaxy are the two Magellanic Clouds? How do we know this visually?

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

The Milky Way Galaxy

Cosmology and the Universe

Filters