Question 1

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 2

Most of the galaxies in the Local Group are:

Accepted Answer

A)  big spirals like our Galaxy and M31. 
B)  small spirals like M33 and the LMC. 
C)  small irregulars like the Magellanic Clouds. 
D)  active galaxies like Centaurus A. 
E)  small ellipticals like the companions to M31 in Andromeda. 
A)  big spirals like our Galaxy and M31. 
B)  small spirals like M33 and the LMC. 
C)  small irregulars like the Magellanic Clouds. 
D)  active galaxies like Centaurus A. 
E)  small ellipticals like the companions to M31 in Andromeda.

Question 3

Explain as exactly as possible the way in which the central engine of active galaxies and quasars actually works.Why is the orientation so important?

Accepted Answer

Matter from an accretion disk falls into

Question 4

Type I supernovae can be used to determine distances to galaxies much better than type II supernovae.

Accepted Answer

A) True 
 B)False

Question 5

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 6

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

Accepted Answer

With 45 members,the Local Group is about

Question 7

A supernova that occurred 30,000 years ago in a galaxy 100,000 light years away will be observed on Earth:

Accepted Answer

A)  30,000 years from now. 
B)  70,000 years ago. 
C)  70,000 years from now. 
D)  100,000 years ago. 
E)  100,000 years from now. 
A)  30,000 years from now. 
B)  70,000 years ago. 
C)  70,000 years from now. 
D)  100,000 years ago. 
E)  100,000 years from now.

Question 8

M-87,the giant elliptical at the heart of the Virgo Supercluster,shows a(n)________ extending outward from its core,moving at relativistic velocities.

Accepted Answer

The answer of M-87,the giant elliptical at the heart of...

Question 9

Distinguish an Sa from an Sc galaxy.

Accepted Answer

Sa spirals have more tightly w

Question 10

How did Hubble use the cosmological redshift to determine distance?

Accepted Answer

The redshift is caused by the Doppler ef

Question 11

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

Accepted Answer

Both are irregular galaxies,wi

Question 12

How does the modern value of Hubble's constant compare to Hubble's original published value?

Accepted Answer

A)  They are very similar. 
B)  The modern value is about 7 times lower than the original value. 
C)  The modern value is about 7 times higher than the original value. 
D)  The modern value is about 700 times lower than the original value. 
E)  The modern value is about 700 times higher than the original value. 
A)  They are very similar. 
B)  The modern value is about 7 times lower than the original value. 
C)  The modern value is about 7 times higher than the original value. 
D)  The modern value is about 700 times lower than the original value. 
E)  The modern value is about 700 times higher than the original value.

Question 13

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 14

Quasars usually have their distances measured by what technique?

Accepted Answer

A)  Type II supernovae 
B)  Cepheids 
C)  Parallax 
D)  Hubble's Law 
E)  Tully-Fisher relation 
A)  Type II supernovae 
B)  Cepheids 
C)  Parallax 
D)  Hubble's Law 
E)  Tully-Fisher relation

Question 15

Not only does the central engine of active galaxies and quasars require a black hole,but also ________ to provide the radiate energy.

Accepted Answer

A)  globular clusters for food 
B)  a very strong magnetic field from neutron stars 
C)  a source of high-energy electrons for synchrotron radiation 
D)  an accretion disk of infalling matter 
E)  a high rate of rotation for the black hole 
A)  globular clusters for food 
B)  a very strong magnetic field from neutron stars 
C)  a source of high-energy electrons for synchrotron radiation 
D)  an accretion disk of infalling matter 
E)  a high rate of rotation for the black hole

Question 16

________ galaxies seem to represent a transition between quasars and similar active nuclei compared to more normal spirals.

Accepted Answer

The answer of ________ galaxies seem to represent a transition...

Question 17

Within the boundaries of the constellations Coma and Virgo are found:

Accepted Answer

A)  all the galaxies in the Local Group. 
B)  the most distant known quasars. 
C)  the largest nearby superclusters of galaxies. 
D)  the closest red dwarfs to the Sun. 
E)  the Large and Small Magellanic Clouds. 
A)  all the galaxies in the Local Group. 
B)  the most distant known quasars. 
C)  the largest nearby superclusters of galaxies. 
D)  the closest red dwarfs to the Sun. 
E)  the Large and Small Magellanic Clouds.

Question 18

Quasar's spectral lines are:

Accepted Answer

A)  emission lines with large redshifts. 
B)  a continuum from the synchrotron radiation. 
C)  fuzzy absorption lines from the merged light of the billions of stars. 
D)  too complex for any interpretation. 
E)  nonexistent, the gas so hot as to be totally ionized, so no lines are seen. 
A)  emission lines with large redshifts. 
B)  a continuum from the synchrotron radiation. 
C)  fuzzy absorption lines from the merged light of the billions of stars. 
D)  too complex for any interpretation. 
E)  nonexistent, the gas so hot as to be totally ionized, so no lines are seen.

Question 19

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

Accepted Answer

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

Question 20

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.

Exam 24: Galaxies: Building Blocks of the Universe

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

Most of the galaxies in the Local Group are:

Explain as exactly as possible the way in which the central engine of active galaxies and quasars actually works.Why is the orientation so important?

Type I supernovae can be used to determine distances to galaxies much better than type II supernovae.

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

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

A supernova that occurred 30,000 years ago in a galaxy 100,000 light years away will be observed on Earth:

M-87,the giant elliptical at the heart of the Virgo Supercluster,shows a(n)________ extending outward from its core,moving at relativistic velocities.

Distinguish an Sa from an Sc galaxy.

How did Hubble use the cosmological redshift to determine distance?

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

How does the modern value of Hubble's constant compare to Hubble's original published value?

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

Quasars usually have their distances measured by what technique?

Not only does the central engine of active galaxies and quasars require a black hole,but also ________ to provide the radiate energy.

________ galaxies seem to represent a transition between quasars and similar active nuclei compared to more normal spirals.

Within the boundaries of the constellations Coma and Virgo are found:

Quasar's spectral lines are:

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

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

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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