Question 1

Edwin Hubble classified elliptical galaxies according to their:

Accepted Answer

A)  size. 
B)  color. 
C)  apparent shape. 
D)  velocities. 
A)  size. 
B)  color. 
C)  apparent shape. 
D)  velocities.

Question 2

What is the most important factor determining the type of AGN an observer sees for any particular source?

Accepted Answer

The orientation of t

Question 3

An astronomer discovers a highly luminous,compact emission source in the center of a distant galaxy.What is the most likely power source for this emission?

Accepted Answer

A supermas

Question 4

Why is it important for astronomers to find galaxies with Type Ia supernova and Cepheid variables?

Accepted Answer

The Cepheid variable technique

Question 5

Which of the following properties are NOT typical of active galactic nuclei?

Accepted Answer

A)  strong absorption lines 
B)  strong emission lines 
C)  strong radio emission 
D)  compact size 
A)  strong absorption lines 
B)  strong emission lines 
C)  strong radio emission 
D)  compact size

Question 6

Why are the jets from radio galaxies compelling evidence that black holes power active galactic nuclei?

Accepted Answer

A)  their extreme luminosity 
B)  their relativistic speed 
C)  their compact bases 
D)  all of the above 
A)  their extreme luminosity 
B)  their relativistic speed 
C)  their compact bases 
D)  all of the above

Question 7

The figure below shows a schematic diagram of an active galactic nucleus.Which region is responsible for broad emission lines?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
A)  A 
B)  B 
C)  C 
D)  D

Question 8

A low-mass galaxy is situated 10 kiloparsecs from a flocculent spiral galaxy.Which of the following is most likely to describe the low-mass galaxy?

Accepted Answer

A)  irregular 
B)  spiral 
C)  barred spiral 
D)  elliptical 
A)  irregular 
B)  spiral 
C)  barred spiral 
D)  elliptical

Question 9

What type of galaxy is shown in the image below?

Accepted Answer

The answer of What type of galaxy is shown in...

Edwin Hubble classified elliptical galaxies according to their:

What is the most important factor determining the type of AGN an observer sees for any particular source?

An astronomer discovers a highly luminous,compact emission source in the center of a distant galaxy.What is the most likely power source for this emission?

Why is it important for astronomers to find galaxies with Type Ia supernova and Cepheid variables?

Which of the following properties are NOT typical of active galactic nuclei?

Why are the jets from radio galaxies compelling evidence that black holes power active galactic nuclei?

The figure below shows a schematic diagram of an active galactic nucleus.Which region is responsible for broad emission lines?

A low-mass galaxy is situated 10 kiloparsecs from a flocculent spiral galaxy.Which of the following is most likely to describe the low-mass galaxy?

What type of galaxy is shown in the image below?

Getting Started: Science, astronomy, and Being Human

A Universe Made, a Universe Discovered

A Universe of Universal Laws

A Universe of Universal Laws

The Architecture and Birth of Planetary Systems

Home Base: Earth and Moon

Sibling Worlds: Mercury, Venus, and Mars

Gas, ice, and Stone: the Outer Planets

Life and the Search for Habitable Worlds

The Sun As a Star

Measuring the Stars: the Main Sequence and Its Meaning

Nursery of the Stars: the Interstellar Medium and Star Formation

To the Graveyard of Stars: the End Points of Stellar Evolution

Down the Rabbit Hole: Relativity and Black Holes

Our City of Stars: the Milky Way

The Cosmic Web: the Large-Scale Structure of the Universe

Cosmology

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Exam 16: A Universe of Galaxies

Edwin Hubble classified elliptical galaxies according to their:

What is the most important factor determining the type of AGN an observer sees for any particular source?

An astronomer discovers a highly luminous,compact emission source in the center of a distant galaxy.What is the most likely power source for this emission?

Why is it important for astronomers to find galaxies with Type Ia supernova and Cepheid variables?

Which of the following properties are NOT typical of active galactic nuclei?

Why are the jets from radio galaxies compelling evidence that black holes power active galactic nuclei?

The figure below shows a schematic diagram of an active galactic nucleus.Which region is responsible for broad emission lines?

A low-mass galaxy is situated 10 kiloparsecs from a flocculent spiral galaxy.Which of the following is most likely to describe the low-mass galaxy?

What type of galaxy is shown in the image below?

Getting Started: Science, astronomy, and Being Human

A Universe Made, a Universe Discovered

A Universe of Universal Laws

A Universe of Universal Laws

The Architecture and Birth of Planetary Systems

Home Base: Earth and Moon

Sibling Worlds: Mercury, Venus, and Mars

Gas, ice, and Stone: the Outer Planets

Life and the Search for Habitable Worlds

The Sun As a Star

Measuring the Stars: the Main Sequence and Its Meaning

Nursery of the Stars: the Interstellar Medium and Star Formation

To the Graveyard of Stars: the End Points of Stellar Evolution

Down the Rabbit Hole: Relativity and Black Holes

Our City of Stars: the Milky Way

The Cosmic Web: the Large-Scale Structure of the Universe

Cosmology

Filters