Question 1

If the merger theory is correct,the brightest active galactic nuclei should:

Accepted Answer

A)  be in the smallest elliptical galaxies. 
B)  contain the youngest stars. 
C)  contain the least mass. 
D)  contain supermassive black holes. 
E)  form small irregular galaxies. 
A)  be in the smallest elliptical galaxies. 
B)  contain the youngest stars. 
C)  contain the least mass. 
D)  contain supermassive black holes. 
E)  form small irregular galaxies. D

Question 2

The further away a galaxy is:

Accepted Answer

A)  the older it is. 
B)  the further ahead in the future it will exist. 
C)  the longer ago it existed. 
D)  the larger it appears. 
E)  the more massive it is. 
A)  the older it is. 
B)  the further ahead in the future it will exist. 
C)  the longer ago it existed. 
D)  the larger it appears. 
E)  the more massive it is. C

Question 3

Compared to the Milky Way,how many stars are contained in the most massive galaxies?

Accepted Answer

A)  two to three times as many 
B)  tens of times as many 
C)  hundreds of times as many 
D)  thousands of times as many 
E)  millions of times as many 
A)  two to three times as many 
B)  tens of times as many 
C)  hundreds of times as many 
D)  thousands of times as many 
E)  millions of times as many B

Question 4

Astronomers think most galaxy interactions took place at redshifts of greater than 1 because:

Accepted Answer

A)  stars were bigger. 
B)  galaxies were bigger. 
C)  galaxies were smaller. 
D)  clusters were more diffuse. 
E)  clusters were more compact. 
A)  stars were bigger. 
B)  galaxies were bigger. 
C)  galaxies were smaller. 
D)  clusters were more diffuse. 
E)  clusters were more compact.

Question 5

Giant irregulars are the most massive of all known galaxies.

Accepted Answer

A) True 
 B)False

Question 6

While quasars may have now vanished,the large black holes they formed are still around,just not being fed as well any more.

Accepted Answer

A) True 
 B)False

Question 7

While yet unseen,some gravitational evidence suggests the existence of dark galaxies.

Accepted Answer

A) True 
 B)False

Question 8

________ galaxies may bridge the gap between spiral galaxies and quasars.

Accepted Answer

A)  Hickson 
B)  Arp 
C)  Core-halo 
D)  Seyfert 
E)  Hubble 
A)  Hickson 
B)  Arp 
C)  Core-halo 
D)  Seyfert 
E)  Hubble

Question 9

A red supergiant is observed in a globular cluster in another galaxy (located 150,000 light years away).It is predicted,based on its mass and age of the star that it will supernova in about 10,000 years.Is this star still there?

Accepted Answer

A)  No, it died in a supernova 10,000 years ago. 
B)  No, it died in a supernova 140,000 years ago. 
C)  No, it died in a supernova 150,000 years ago. 
D)  Yes, it will die in a supernova in 10,000 years. 
E)  Yes, it will die in a supernova 160,000 years from now. 
A)  No, it died in a supernova 10,000 years ago. 
B)  No, it died in a supernova 140,000 years ago. 
C)  No, it died in a supernova 150,000 years ago. 
D)  Yes, it will die in a supernova in 10,000 years. 
E)  Yes, it will die in a supernova 160,000 years from now.

Question 10

Due to the galaxy density and collisions,________ are rare in the centers of clusters.

Accepted Answer

A)  irregulars 
B)  quasars 
C)  spirals 
D)  black holes 
E)  blazars 
A)  irregulars 
B)  quasars 
C)  spirals 
D)  black holes 
E)  blazars

Question 11

Most large spirals and ellipticals are comparable to the Milky Way in mass.

Accepted Answer

A) True 
 B)False

Question 12

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

Accepted Answer

As galaxies collide they chang

Question 13

The extended sheet of galaxies that spans 70 Mpc × 200 Mpc and includes about 24,000 galaxies is called the ________.

Accepted Answer

The answer of The extended sheet of galaxies that spans...

Question 14

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 15

The pregalactic blobs had masses similar to:

Accepted Answer

A)  the Earth. 
B)  the Sun. 
C)  globular clusters. 
D)  the Large Magellanic Cloud. 
E)  the Milky Way. 
A)  the Earth. 
B)  the Sun. 
C)  globular clusters. 
D)  the Large Magellanic Cloud. 
E)  the Milky Way.

Question 16

Vast majority of the known volume of the universe lies in the voids.

Accepted Answer

A) True 
 B)False

Question 17

Relate black holes in the early galaxies to quasars.

Accepted Answer

Star-produced black holes in young galax

Question 18

Galaxies in clusters are much more likely to become "active" than ones alone in space.

Accepted Answer

A) True 
 B)False

Question 19

The Sloan Digital Sky Survey uses:

Accepted Answer

A)  a single space-based telescope. 
B)  a single Earth-based telescope. 
C)  an array of Earth-based telescopes. 
D)  several widely distributed Earth-based telescopes. 
E)  several space-based telescopes. 
A)  a single space-based telescope. 
B)  a single Earth-based telescope. 
C)  an array of Earth-based telescopes. 
D)  several widely distributed Earth-based telescopes. 
E)  several space-based telescopes.

Question 20

Why do rich clusters of galaxies contain a larger fraction of ellipticals than poor clusters or groups of galaxies?

Accepted Answer

In the densest clusters,collis

Exam 25: Galaxies and Dark Matter: The Large-Scale Structure of the Cosmos

If the merger theory is correct,the brightest active galactic nuclei should:

The further away a galaxy is:

Compared to the Milky Way,how many stars are contained in the most massive galaxies?

Astronomers think most galaxy interactions took place at redshifts of greater than 1 because:

Giant irregulars are the most massive of all known galaxies.

While quasars may have now vanished,the large black holes they formed are still around,just not being fed as well any more.

While yet unseen,some gravitational evidence suggests the existence of dark galaxies.

________ galaxies may bridge the gap between spiral galaxies and quasars.

A red supergiant is observed in a globular cluster in another galaxy (located 150,000 light years away).It is predicted,based on its mass and age of the star that it will supernova in about 10,000 years.Is this star still there?

Due to the galaxy density and collisions,________ are rare in the centers of clusters.

Most large spirals and ellipticals are comparable to the Milky Way in mass.

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

The extended sheet of galaxies that spans 70 Mpc × 200 Mpc and includes about 24,000 galaxies is called the ________.

What is true of spiral galaxies?

The pregalactic blobs had masses similar to:

Vast majority of the known volume of the universe lies in the voids.

Relate black holes in the early galaxies to quasars.

Galaxies in clusters are much more likely to become "active" than ones alone in space.

The Sloan Digital Sky Survey uses:

Why do rich clusters of galaxies contain a larger fraction of ellipticals than poor clusters or groups of 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: Building Blocks of the Universe

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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