Question 1

Merging of galaxies is known as ____________.

Accepted Answer

cannibalis

Question 2

The Local Group of galaxies is dominated by the presence of spiral galaxies.

Accepted Answer

A) True 
 B)False

Question 3

The radio radiation emitted by a radio lobe is mainly synchrotron radiation.

Accepted Answer

A) True 
 B)False

Question 4

The hot spots in a double-lobed radio source

Accepted Answer

A) appear to coincide with the location of the central galaxy responsible for the jets. 
B) are where hot excited gas interacts with the intergalactic medium. 
C) are only found near quasars. 
D) produce enough visible energy to be imaged at visible wavelengths. 
E) are always perpendicular to each other. 
A) appear to coincide with the location of the central galaxy responsible for the jets. 
B) are where hot excited gas interacts with the intergalactic medium. 
C) are only found near quasars. 
D) produce enough visible energy to be imaged at visible wavelengths. 
E) are always perpendicular to each other.

Question 5

Differences among AGNs as viewed from different inclination angles is known as a ________________.

Accepted Answer

The answer of Differences among AGNs as viewed from different...

Question 6

Galactic cannibalism refers to

Accepted Answer

A) binary galaxies. 
B) the merging of galaxies. 
C) galaxies drawing in gas from the intergalactic medium. 
D) the destruction of a galaxy's globular clusters by the galaxy's nucleus. 
E) None of the other choices are correct. 
A) binary galaxies. 
B) the merging of galaxies. 
C) galaxies drawing in gas from the intergalactic medium. 
D) the destruction of a galaxy's globular clusters by the galaxy's nucleus. 
E) None of the other choices are correct.

Question 7

-The above visual wavelength image is an ___________-type galaxy.

Accepted Answer

A) Sa 
B) S0 
C) Sc 
D) SBa 
A) Sa 
B) S0 
C) Sc 
D) SBa

Question 8

What kind of galaxy is this

Accepted Answer

A) elliptical 
B) spiral 
C) Seyfert 
D) lenticular (e.g., S0) 
A) elliptical 
B) spiral 
C) Seyfert 
D) lenticular (e.g., S0)

Question 9

When two galaxies collide, they pass through each other and their stars almost never collide.

Accepted Answer

A) True 
 B)False

Question 10

How do astronomers know that the luminous regions of active nuclei of active galaxies are very small

Accepted Answer

A) Their nuclei are much brighter than expected. 
B) The orbits of stars near the center of the galactic nuclei are faster than expected. 
C) The luminosity of the nuclei varies over short times. 
D) The color of the nuclei is different than expected. 
A) Their nuclei are much brighter than expected. 
B) The orbits of stars near the center of the galactic nuclei are faster than expected. 
C) The luminosity of the nuclei varies over short times. 
D) The color of the nuclei is different than expected.

Question 11

The mass of a single galaxy might be found by

Accepted Answer

A) the double galaxy method. 
B) the rotation curve method. 
C) the cluster method. 
D) any of the methods (i.e., double galaxy, rotation curve, cluster) 
E) none of these methods. 
A) the double galaxy method. 
B) the rotation curve method. 
C) the cluster method. 
D) any of the methods (i.e., double galaxy, rotation curve, cluster) 
E) none of these methods.

Question 12

Seyfert galaxies are spiral galaxies with active cores.

Accepted Answer

A) True 
 B)False

Question 13

The Milky Way is part of 
I.a poor cluster.
II.a rich cluster.
III.the Virgo Cluster.
IV.the Local Group.

Accepted Answer

A) I and III 
B) I and IV 
C) II and III 
D) II and IV 
E) just III 
A) I and III 
B) I and IV 
C) II and III 
D) II and IV 
E) just III

Question 14

_________________ galaxies are very luminous at X-ray and ultraviolet wavelengths and have broad emission lines in their spectra.

Accepted Answer

The answer of _________________ galaxies are very luminous at X-ray...

Question 15

The radio lobes that are on each side of some radio galaxies and jets from them produce mainly

Accepted Answer

A) 21-cm radiation. 
B) synchrotron radiation. 
C) black body radiation. 
D) emission lies due to hydrogen. 
E) absorption lines due to hydrogen. 
A) 21-cm radiation. 
B) synchrotron radiation. 
C) black body radiation. 
D) emission lies due to hydrogen. 
E) absorption lines due to hydrogen.

Question 16

The Large and Small Magellanic Clouds are satellites galaxies of the Milky Way.

Accepted Answer

A) True 
 B)False

Question 17

Of the following, which of the following is the largest object

Accepted Answer

A) the Milky Way galaxy 
B) the Large Magellanic Cloud 
C) the Local Group 
D) the Andromeda galaxy 
A) the Milky Way galaxy 
B) the Large Magellanic Cloud 
C) the Local Group 
D) the Andromeda galaxy

Question 18

All __________ galaxies are spiral galaxies that have small, luminous nuclei.

Accepted Answer

A) active 
B) radio 
C) Seyfert 
D) double-lobed radio 
E) blazar 
A) active 
B) radio 
C) Seyfert 
D) double-lobed radio 
E) blazar

Question 19

__________ can be used to determine the galaxy's mass if the galaxy is reasonably close, so that the Doppler shift of the galaxy disk material can be measured at several distances from the galaxy's center relative to the center.

Accepted Answer

A) The Hubble constant 
B) A galaxy's color 
C) A galaxy's rotation curve 
D) A galaxy's diameter 
E) The velocity dispersion method 
A) The Hubble constant 
B) A galaxy's color 
C) A galaxy's rotation curve 
D) A galaxy's diameter 
E) The velocity dispersion method

Question 20

The above visual wavelength image is of an interacting spiral galaxy.

Accepted Answer

A) True 
 B)False

Merging of galaxies is known as ____________.

The Local Group of galaxies is dominated by the presence of spiral galaxies.

The radio radiation emitted by a radio lobe is mainly synchrotron radiation.

The hot spots in a double-lobed radio source

Differences among AGNs as viewed from different inclination angles is known as a ________________.

Galactic cannibalism refers to

-The above visual wavelength image is an ___________-type galaxy.

What kind of galaxy is this

When two galaxies collide, they pass through each other and their stars almost never collide.

How do astronomers know that the luminous regions of active nuclei of active galaxies are very small

The mass of a single galaxy might be found by

Seyfert galaxies are spiral galaxies with active cores.

The Milky Way is part of I.a poor cluster. II.a rich cluster. III.the Virgo Cluster. IV.the Local Group.

_________________ galaxies are very luminous at X-ray and ultraviolet wavelengths and have broad emission lines in their spectra.

The radio lobes that are on each side of some radio galaxies and jets from them produce mainly

The Large and Small Magellanic Clouds are satellites galaxies of the Milky Way.

Of the following, which of the following is the largest object

All __________ galaxies are spiral galaxies that have small, luminous nuclei.

__________ can be used to determine the galaxy's mass if the galaxy is reasonably close, so that the Doppler shift of the galaxy disk material can be measured at several distances from the galaxy's center relative to the center.

The above visual wavelength image is of an interacting spiral galaxy.

Here and Now

A Users Guide to the Sky

Cycles of the Sun and Moon

The Origin of Modern Astronomy

Light and Telescopes

Atoms and Spectra

The Sun

The Family of Stars

The Formation and Structure of Stars

The Deaths of Stars

Neutron Stars and Black Holes

The Milky Way Galaxy

Modern Cosmology

The Origin of the Solar System

Earth and Moon: Bases for Comparative Planetology

Mercury, Venus, and Mars

The Outer Solar System

Meteorites, Asteroids, and Comets

Astrobiology: Life on Other Worlds

Filters

Exam 13: Galaxies: Normal and Active

Merging of galaxies is known as ____________.

The Local Group of galaxies is dominated by the presence of spiral galaxies.

The radio radiation emitted by a radio lobe is mainly synchrotron radiation.

The hot spots in a double-lobed radio source

Differences among AGNs as viewed from different inclination angles is known as a ________________.

Galactic cannibalism refers to

-The above visual wavelength image is an ___________-type galaxy.

What kind of galaxy is this

When two galaxies collide, they pass through each other and their stars almost never collide.

How do astronomers know that the luminous regions of active nuclei of active galaxies are very small

The mass of a single galaxy might be found by

Seyfert galaxies are spiral galaxies with active cores.

The Milky Way is part of I.a poor cluster. II.a rich cluster. III.the Virgo Cluster. IV.the Local Group.

_________________ galaxies are very luminous at X-ray and ultraviolet wavelengths and have broad emission lines in their spectra.

The radio lobes that are on each side of some radio galaxies and jets from them produce mainly

The Large and Small Magellanic Clouds are satellites galaxies of the Milky Way.

Of the following, which of the following is the largest object

All __________ galaxies are spiral galaxies that have small, luminous nuclei.

__________ can be used to determine the galaxy's mass if the galaxy is reasonably close, so that the Doppler shift of the galaxy disk material can be measured at several distances from the galaxy's center relative to the center.

The above visual wavelength image is of an interacting spiral galaxy.

Here and Now

A Users Guide to the Sky

Cycles of the Sun and Moon

The Origin of Modern Astronomy

Light and Telescopes

Atoms and Spectra

The Sun

The Family of Stars

The Formation and Structure of Stars

The Deaths of Stars

Neutron Stars and Black Holes

The Milky Way Galaxy

Modern Cosmology

The Origin of the Solar System

Earth and Moon: Bases for Comparative Planetology

Mercury, Venus, and Mars

The Outer Solar System

Meteorites, Asteroids, and Comets

Astrobiology: Life on Other Worlds

Filters