Question 1

In Hubble's classification,which type of galaxy has a small bulge and loose,widely spread,poorly defined spiral pattern?

Accepted Answer

A)  SO 
B)  S9 
C)  Sa 
D)  Sc 
E)  SBw 
A)  SO 
B)  S9 
C)  Sa 
D)  Sc 
E)  SBw

Question 2

The first hint that the universe might be expanding came from Vesto Slipher's work with the spectra of spiral nebulae in 1912.

Accepted Answer

A) True 
 B)False

Question 3

While our two companions,the Magellanic Clouds,are irregulars,Andromeda's two companions,M-32 and M-110,are dwarf ellipticals.

Accepted Answer

A) True 
 B)False

Question 4

Why is it that the quasars we see represent a time when the universe was younger?

Accepted Answer

Quasars have very large redshi

Question 5

What is the nearest huge cluster of galaxies to our Local Group?

Accepted Answer

A)  Coma Cluster 
B)  Centaurus Cluster 
C)  Virgo Cluster 
D)  Orion Nebula 
E)  Hercules Cluster 
A)  Coma Cluster 
B)  Centaurus Cluster 
C)  Virgo Cluster 
D)  Orion Nebula 
E)  Hercules Cluster

Question 6

The first clue to the significance of quasars came from the discovery that some of these "stars" were much stronger radio sources than any normal star.

Accepted Answer

A) True 
 B)False

Question 7

The latest evidence from 2MASS suggests our own Milky Way is type SBb.

Accepted Answer

A) True 
 B)False

Question 8

Our own Local Group is dwarfed by the much larger Virgo Cluster,about 50 million light years distant.

Accepted Answer

A) True 
 B)False

Question 9

The Tully-Fisher relation exists between the galaxy's luminosity and its:

Accepted Answer

A)  color. 
B)  age. 
C)  rotation. 
D)  mass. 
E)  size. 
A)  color. 
B)  age. 
C)  rotation. 
D)  mass. 
E)  size.

Question 10

Most galaxies are members of some sort of cluster of galaxies.

Accepted Answer

A) True 
 B)False

Question 11

The lobes of a radio galaxy can be as much as:

Accepted Answer

A)  dozens of light years from the galaxy's nucleus. 
B)  hundreds of light years from the galaxy's nucleus. 
C)  thousands of light years from the galaxy's nucleus. 
D)  millions of light years from the galaxy's nucleus. 
E)  billions of light years from the galaxy's nucleus. 
A)  dozens of light years from the galaxy's nucleus. 
B)  hundreds of light years from the galaxy's nucleus. 
C)  thousands of light years from the galaxy's nucleus. 
D)  millions of light years from the galaxy's nucleus. 
E)  billions of light years from the galaxy's nucleus.

Question 12

A billion solar mass black hole would still have a radius of only:

Accepted Answer

A)  20 AU. 
B)  15 parsecs. 
C)  150 kilometers. 
D)  3 kpc. 
E)  two million light years. 
A)  20 AU. 
B)  15 parsecs. 
C)  150 kilometers. 
D)  3 kpc. 
E)  two million light years.

Question 13

________ galaxies are essentially featureless; their light reveals evidence for the presence of only old red Main Sequence and red giant stars.

Accepted Answer

The answer of ________ galaxies are essentially featureless; their light...

Question 14

What is the nearest huge cluster of thousands of galaxies,to which the Local Group may belong?

Accepted Answer

A)  The Great Wall 
B)  Coma Cluster 
C)  Virgo Cluster 
D)  Corona Borealis Cluster 
E)  Sagittarius Cluster 
A)  The Great Wall 
B)  Coma Cluster 
C)  Virgo Cluster 
D)  Corona Borealis Cluster 
E)  Sagittarius Cluster

Question 15

Which type of galaxy has a stellar disk,but without gas and dust?

Accepted Answer

A)  E0 
B)  E7 
C)  Irr I 
D)  S0 
E)  SE 
A)  E0 
B)  E7 
C)  Irr I 
D)  S0 
E)  SE

Question 16

In color photos,spirals typically have ________ arms with pink H II regions.

Accepted Answer

The answer of In color photos,spirals typically have ________ arms...

Question 17

Why does the Cepheid "standard candle" have limited usefulness beyond 20 Mpc?

Accepted Answer

A)  Distant galaxies are seen in the past, when Cepheid variables behaved differently than they do today. 
B)  Distant galaxies are so young they do not contain Cepheids. 
C)  Cepheids are too faint to be seen beyond that distance, even with HST. 
D)  The light variability of Cepheids diminishes with distance so they do not appear to vary there. 
E)  Older distant Cepheids are of Population II, where the period-luminosity relation no longer works. 
A)  Distant galaxies are seen in the past, when Cepheid variables behaved differently than they do today. 
B)  Distant galaxies are so young they do not contain Cepheids. 
C)  Cepheids are too faint to be seen beyond that distance, even with HST. 
D)  The light variability of Cepheids diminishes with distance so they do not appear to vary there. 
E)  Older distant Cepheids are of Population II, where the period-luminosity relation no longer works.

Question 18

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

Accepted Answer

Like our spiral arms

Question 19

Explain what a standard candle is and how it could be used to determine a galaxy's distance.

Accepted Answer

A standard candle is an object with a we

Question 20

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

Accepted Answer

A) True 
 B)False

Exam 24: Galaxies: Building Blocks of the Universe

In Hubble's classification,which type of galaxy has a small bulge and loose,widely spread,poorly defined spiral pattern?

The first hint that the universe might be expanding came from Vesto Slipher's work with the spectra of spiral nebulae in 1912.

While our two companions,the Magellanic Clouds,are irregulars,Andromeda's two companions,M-32 and M-110,are dwarf ellipticals.

Why is it that the quasars we see represent a time when the universe was younger?

What is the nearest huge cluster of galaxies to our Local Group?

The first clue to the significance of quasars came from the discovery that some of these "stars" were much stronger radio sources than any normal star.

The latest evidence from 2MASS suggests our own Milky Way is type SBb.

Our own Local Group is dwarfed by the much larger Virgo Cluster,about 50 million light years distant.

The Tully-Fisher relation exists between the galaxy's luminosity and its:

Most galaxies are members of some sort of cluster of galaxies.

The lobes of a radio galaxy can be as much as:

A billion solar mass black hole would still have a radius of only:

________ galaxies are essentially featureless; their light reveals evidence for the presence of only old red Main Sequence and red giant stars.

What is the nearest huge cluster of thousands of galaxies,to which the Local Group may belong?

Which type of galaxy has a stellar disk,but without gas and dust?

In color photos,spirals typically have ________ arms with pink H II regions.

Why does the Cepheid "standard candle" have limited usefulness beyond 20 Mpc?

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

Explain what a standard candle is and how it could be used to determine a galaxy's distance.

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

Charting the Heavens: The Foundations of Astronomy

The Copernican Revolution: The Birth of Modern Science

Radiation: Information from the Cosmos

Spectroscopy: The Inner Workings of Atoms

Telescopes: The Tools of Astronomy

The Solar System: Comparative Planetology and Formation Models

Earth: Our Home in Space

The Moon and Mercury: Scorched and Battered Worlds

Venus: Earth's Sister Planet

Mars: A Near Miss for Life?

Jupiter: Giant of the Solar System

Saturn: Spectacular Rings and Mysterious Moons

Uranus and Neptune: The Outer Worlds of the Solar System

Solar System Debris: Keys to Our Origin

Exoplanets: Planetary Systems Beyond Our Own

The Sun: Our Parent Star

The Stars: Giants,Dwarfs,and the Main Sequence

The Interstellar Medium: Gas and Dust among the Stars

Star Formation: A Traumatic Birth

Stellar Evolution: The Life and Death of a Star

Stellar Explosions: Novae,Supernovae,and the Formation of the Elements

Neutron Stars and Black Holes: Strange States of Matter

The Milky Way Galaxy: A Spiral in Space

Galaxies and Dark Matter: The Large-Scale Structure of the Cosmos

Cosmology: The Big Bang and the Fate of the Universe

The Early Universe: Toward the Beginning of Time

Life in the Universe: Are We Alone?

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