Question 1

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

Accepted Answer

A) True 
 B)False

Question 2

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

Accepted Answer

A) True 
 B)False

Question 3

You observe a spiral galaxy with a large central bulge and tightly wrapped arms.It would be classified an:

Accepted Answer

A)  Sc. 
B)  Sb. 
C)  Sa. 
D)  SO. 
E)  E7. 
A)  Sc. 
B)  Sb. 
C)  Sa. 
D)  SO. 
E)  E7.

Question 4

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

Accepted Answer

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

Question 5

Which of the following is true about the ages and masses of spiral and elliptical galaxies?

Accepted Answer

A)  Ellipticals are all older and more massive than spirals. 
B)  Spirals are older, and much more massive than ellipticals. 
C)  Both types are about the same age, but spirals vary less in mass. 
D)  Spirals are younger and much more massive than any elliptical. 
E)  Ellipticals are older, and show a far wider range of masses than do spirals. 
A)  Ellipticals are all older and more massive than spirals. 
B)  Spirals are older, and much more massive than ellipticals. 
C)  Both types are about the same age, but spirals vary less in mass. 
D)  Spirals are younger and much more massive than any elliptical. 
E)  Ellipticals are older, and show a far wider range of masses than do spirals.

Question 6

While examining the spectrum of a galaxy you find all the hydrogen lines are shifted to longer wavelengths.This galaxy is:

Accepted Answer

A)  moving away from us. 
B)  moving towards us. 
C)  expanding explosively. 
D)  blue shifted. 
E)  not forming new stars. 
A)  moving away from us. 
B)  moving towards us. 
C)  expanding explosively. 
D)  blue shifted. 
E)  not forming new stars.

Question 7

An intermediately wound barred spiral galaxy would,in Hubble's system,be:

Accepted Answer

A)  BS2. 
B)  BSE.5. 
C)  SBb. 
D)  S2B. 
E)  SIrr. 
A)  BS2. 
B)  BSE.5. 
C)  SBb. 
D)  S2B. 
E)  SIrr.

Question 8

Most galaxies are spirals.

Accepted Answer

A) True 
 B)False

Question 9

Relate synchrotron radiation to the central engine of active galaxies.

Accepted Answer

This non-stellar radiation is produced b

Question 10

Hubble's Law starts as a plot of recessional ________ versus distance to the galaxies.

Accepted Answer

The answer of Hubble's Law starts as a plot of...

Question 11

Which statement about the Local Group is FALSE?

Accepted Answer

A)  It contains about 45 member galaxies. 
B)  Its notable spirals include the Milky Way, M31, and M33. 
C)  Most of its members are dwarf elliptical and irregular galaxies. 
D)  It contains the large radio galaxy Centaurus A. 
E)  It is about three million light years across. 
A)  It contains about 45 member galaxies. 
B)  Its notable spirals include the Milky Way, M31, and M33. 
C)  Most of its members are dwarf elliptical and irregular galaxies. 
D)  It contains the large radio galaxy Centaurus A. 
E)  It is about three million light years across.

Question 12

Which of the following paraphrases Hubble Law?

Accepted Answer

A)  The faster the galaxy spins, the more massive and luminous it is. 
B)  The greater the distance to a galaxy, the greater its redshift. 
C)  The greater the distance to a galaxy, the fainter it is. 
D)  The more distant a galaxy is, the younger it appears. 
E)  The older the galaxy appears to us, the more luminous it is. 
A)  The faster the galaxy spins, the more massive and luminous it is. 
B)  The greater the distance to a galaxy, the greater its redshift. 
C)  The greater the distance to a galaxy, the fainter it is. 
D)  The more distant a galaxy is, the younger it appears. 
E)  The older the galaxy appears to us, the more luminous it is.

Question 13

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 14

The Tully-Fisher relation is much like the mass-luminosity relationship,except that the galaxy's rotation is used to find its mass; the greater the mass,the faster the rotation rate.

Accepted Answer

A) True 
 B)False

Question 15

Some lobes of radio galaxies are in fact moving faster than the speed of light.

Accepted Answer

A) True 
 B)False

Question 16

Synchrotron radiation found with active nuclei implies strong ________ fields directing and accelerating the electrons trapped in them.

Accepted Answer

The answer of Synchrotron radiation found with active nuclei implies...

Question 17

The Large and Small Magellanic Clouds fall into Hubble's class:

Accepted Answer

A)  SBc. 
B)  Pec. 
C)  E6. 
D)  Irr I. 
E)  E3. 
A)  SBc. 
B)  Pec. 
C)  E6. 
D)  Irr I. 
E)  E3.

Question 18

That quasars were at cosmological distances yet appeared like ordinary faint stars meant:

Accepted Answer

A)  they were the brightest stars ever observed. 
B)  they must be very large. 
C)  they must contain many O and B type stars. 
D)  they must be producing such large quantities of energy than even fusion could not explain their output. 
E)  they must be very small, but bright due to gravitational lensing. 
A)  they were the brightest stars ever observed. 
B)  they must be very large. 
C)  they must contain many O and B type stars. 
D)  they must be producing such large quantities of energy than even fusion could not explain their output. 
E)  they must be very small, but bright due to gravitational lensing.

Question 19

Type Sc are the dustiest of the galaxies.

Accepted Answer

A) True 
 B)False

Question 20

Most galaxies in the Local Group are:

Accepted Answer

A)  dwarf spirals. 
B)  small irregulars similar to the Magellanic Clouds. 
C)  larger spirals than either the Milky Way or M-31 in Andromeda. 
D)  dwarf ellipticals, similar to the companions of M-31. 
E)  brown dwarfs, with even more dust than our own Galaxy. 
A)  dwarf spirals. 
B)  small irregulars similar to the Magellanic Clouds. 
C)  larger spirals than either the Milky Way or M-31 in Andromeda. 
D)  dwarf ellipticals, similar to the companions of M-31. 
E)  brown dwarfs, with even more dust than our own Galaxy.

Exam 24: Galaxies: Building Blocks of the Universe

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

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

You observe a spiral galaxy with a large central bulge and tightly wrapped arms.It would be classified an:

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

Which of the following is true about the ages and masses of spiral and elliptical galaxies?

While examining the spectrum of a galaxy you find all the hydrogen lines are shifted to longer wavelengths.This galaxy is:

An intermediately wound barred spiral galaxy would,in Hubble's system,be:

Most galaxies are spirals.

Relate synchrotron radiation to the central engine of active galaxies.

Hubble's Law starts as a plot of recessional ________ versus distance to the galaxies.

Which statement about the Local Group is FALSE?

Which of the following paraphrases Hubble Law?

Most active galactic nuclei are powered by:

The Tully-Fisher relation is much like the mass-luminosity relationship,except that the galaxy's rotation is used to find its mass; the greater the mass,the faster the rotation rate.

Some lobes of radio galaxies are in fact moving faster than the speed of light.

Synchrotron radiation found with active nuclei implies strong ________ fields directing and accelerating the electrons trapped in them.

The Large and Small Magellanic Clouds fall into Hubble's class:

That quasars were at cosmological distances yet appeared like ordinary faint stars meant:

Type Sc are the dustiest of the galaxies.

Most galaxies in the Local Group are:

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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