Question 1

How does the Tully-Fisher relation allow the calculation of the distance to a spiral galaxy?

Accepted Answer

By measuring the broadening of a spiral'

Question 2

If we are directly in the line of a jet coming out of the lobe galaxy's core, we see a:

Accepted Answer

A) hypernovae. 
B) pulsar. 
C) quasar. 
D) blazar. 
E) magnetar. 
A) hypernovae. 
B) pulsar. 
C) quasar. 
D) blazar. 
E) magnetar.

Question 3

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

Accepted Answer

They are "all halo," with only

Question 4

Why is light variability a critical issue with the sizes of active nuclei?

Accepted Answer

The source of the light cannot be any la

Question 5

Discuss the population, size, and types of galaxies we find in our Local Group.

Accepted Answer

With 45 members, the Local Group is abou

Question 6

Distinguish an Sa from an Sc galaxy.

Accepted Answer

Sa spirals have more tightly w

Question 7

Galaxies are classified into types solely on the basis of their color.

Accepted Answer

A) True 
 B)False

Question 8

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

Accepted Answer

A) True 
 B)False

Question 9

What is true of spiral galaxies?

Accepted Answer

A) They are much less common at larger redshifts. 
B) They are relatively rare in regions of high galaxy density. 
C) They are only found in the center of rich galaxy clusters. 
D) They have never been seen to have large redshifts. 
E) They evolve from giant ellipticals. 
A) They are much less common at larger redshifts. 
B) They are relatively rare in regions of high galaxy density. 
C) They are only found in the center of rich galaxy clusters. 
D) They have never been seen to have large redshifts. 
E) They evolve from giant ellipticals.

Question 10

Active galactic nuclei are usually powered by supermassive black holes.

Accepted Answer

A) True 
 B)False

Question 11

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

Accepted Answer

A) True 
 B)False

Question 12

M-31 in Andromeda is a slightly bigger version of our own Milky Way.

Accepted Answer

A) True 
 B)False

Question 13

The flattest of the ellipticals are class:

Accepted Answer

A) E0. 
B) SBO. 
C) E7. 
D) E9. 
E) SBF. 
A) E0. 
B) SBO. 
C) E7. 
D) E9. 
E) SBF.

Question 14

What are the Magellanic Clouds? What happened in the LMC in 1987?

Accepted Answer

The Magellanic Clouds are our companion

Question 15

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 16

The huge lobe radio galaxy at the center of the Virgo Supercluster is:

Accepted Answer

A) Virgo X-1. 
B) M-87, a giant elliptical galaxy. 
C) M-74, a very bright Seyfert Spiral. 
D) M-82, disturbed by the passage of M-81 nearby. 
E) the Large Magellanic Cloud, disturbed by Supernova 1987A. 
A) Virgo X-1. 
B) M-87, a giant elliptical galaxy. 
C) M-74, a very bright Seyfert Spiral. 
D) M-82, disturbed by the passage of M-81 nearby. 
E) the Large Magellanic Cloud, disturbed by Supernova 1987A.

Question 17

The smallest dwarf irregular galaxies are no richer in stars than the largest known globularclusters.

Accepted Answer

A) True 
 B)False

Question 18

A(n)________ spiral galaxy has a very bright active nucleus with violent motions in theinterstellar gas.

Accepted Answer

The answer of A(n)________ spiral galaxy has a very bright...

Question 19

Most active galactic nuclei are powered by:

Accepted Answer

A) supermassive black holes. 
B) a large number of supernovae. 
C) mergers of compact objects. 
D) black hole mergers. 
E) extra-terrestrial civilizations. 
A) supermassive black holes. 
B) a large number of supernovae. 
C) mergers of compact objects. 
D) black hole mergers. 
E) extra-terrestrial civilizations.

Question 20

In Hubble's classification, which type of galaxy has no stellar disk and no gas or dust?

Accepted Answer

A)  $\text { E0 }$ 
B)  $\text { S0 }$ 
C) Sa 
D) SBc 
E) E9 
A)  $\text { E0 }$ 
B)  $\text { S0 }$ 
C) Sa 
D) SBc 
E) E9

Exam 24: Galaxies: Building Blocks of the Universe

How does the Tully-Fisher relation allow the calculation of the distance to a spiral galaxy?

If we are directly in the line of a jet coming out of the lobe galaxy's core, we see a:

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

Why is light variability a critical issue with the sizes of active nuclei?

Discuss the population, size, and types of galaxies we find in our Local Group.

Distinguish an Sa from an Sc galaxy.

Galaxies are classified into types solely on the basis of their color.

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

What is true of spiral galaxies?

Active galactic nuclei are usually powered by supermassive black holes.

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

M-31 in Andromeda is a slightly bigger version of our own Milky Way.

The flattest of the ellipticals are class:

What are the Magellanic Clouds? What happened in the LMC in 1987?

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

The huge lobe radio galaxy at the center of the Virgo Supercluster is:

The smallest dwarf irregular galaxies are no richer in stars than the largest known globularclusters.

A(n)________ spiral galaxy has a very bright active nucleus with violent motions in theinterstellar gas.

Most active galactic nuclei are powered by:

In Hubble's classification, which type of galaxy has no stellar disk and no gas or dust?

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: Earths 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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