Question 1

Some large clusters of galaxies do not appear to contain enough mass to hold themselves together.

Accepted Answer

A) True 
 B)False  True

Question 2

The look-back time is

Accepted Answer

A) the time it takes for the light from an object to reach Earth. 
B) numerically equal to the distance in light-years. 
C) smaller for more distant objects. 
D) All of the other choices are correct. 
E) the time it takes for the light from an object to reach Earth and numerically equal to the distance in light-years. 
A) the time it takes for the light from an object to reach Earth. 
B) numerically equal to the distance in light-years. 
C) smaller for more distant objects. 
D) All of the other choices are correct. 
E) the time it takes for the light from an object to reach Earth and numerically equal to the distance in light-years. E

Question 3

Gravitational lensing

Accepted Answer

A) occurs when light passes near a massive object and is deflected by the object's gravitational field. 
B) can be used to determine the luminosity of a galaxy. 
C) occurs when the mass of a galaxy is greater than expected from the luminosity of the galaxy. 
D) occurs when the mass of a galaxy is less than expected from the luminosity of the galaxy. 
E) can be used to determine the recessional velocity of a galaxy. 
A) occurs when light passes near a massive object and is deflected by the object's gravitational field. 
B) can be used to determine the luminosity of a galaxy. 
C) occurs when the mass of a galaxy is greater than expected from the luminosity of the galaxy. 
D) occurs when the mass of a galaxy is less than expected from the luminosity of the galaxy. 
E) can be used to determine the recessional velocity of a galaxy. A

Question 4

in the following image, the _____________ is the gravitational lens and the ___________ is the lensed object.

Accepted Answer

A) distant galaxy, cluster 
B) cluster, distant galaxy 
C) cluster, star 
D) star, cluster 
A) distant galaxy, cluster 
B) cluster, distant galaxy 
C) cluster, star 
D) star, cluster

Question 5

Why can't galaxy evolution go from elliptical to spiral to irregular

Accepted Answer

An elliptical galaxy cannot become a spi

Question 6

If the redshift of a quasar were 3, at what wavelength would the 486.1-nm line of hydrogen appear in the quasar's spectrum

Accepted Answer

The answer of If the redshift of a quasar were...

Question 7

-The above visual wavelength image of spectra (right panel) taken from a spiral galaxy (left panel) shows an emission line that is__________ on the side that is rotating away and an emission line that is ___________ on the side that is rotating towards us.

Accepted Answer

A) redshifted, redshifted 
B) blueshifted, blueshifted 
C) redshifted, blueshifted 
D) blueshifted, redshifted 
A) redshifted, redshifted 
B) blueshifted, blueshifted 
C) redshifted, blueshifted 
D) blueshifted, redshifted

Question 8

Quasar redshifts are usually larger than the redshifts of the visible galaxies.

Accepted Answer

A) True 
 B)False

Question 9

Evidence that tidal interactions and collisions of galaxies may make ordinary galaxies active is that

Accepted Answer

A) many active galaxies are distorted. 
B) some active galaxies have companions. 
C) many active galaxies are distorted and some active galaxies have companions. 
D) active galaxies are neither distorted nor have companions. 
A) many active galaxies are distorted. 
B) some active galaxies have companions. 
C) many active galaxies are distorted and some active galaxies have companions. 
D) active galaxies are neither distorted nor have companions.

Question 10

The above visual wavelength image is that of an S0 galaxy.

Accepted Answer

A) True 
 B)False

Question 11

The above visual wavelength image of a small but very luminous star-like nucleus is an example of a Seyfert.

Accepted Answer

A) True 
 B)False

Question 12

The above (enhanced) visual wavelength image indicates galactic cannibalism has occurred.

Accepted Answer

A) True 
 B)False

Question 13

If the redshifts of quasars arise from the expansion of the universe yet they have brighter magnitudes than galaxies with the same redshifts, the quasar must

Accepted Answer

A) be very small. 
B) be within the Local Group. 
C) be a single star with an extremely large mass. 
D) be moving toward Earth with a large radial velocity. 
E) emit a very large amount of energy per second. 
A) be very small. 
B) be within the Local Group. 
C) be a single star with an extremely large mass. 
D) be moving toward Earth with a large radial velocity. 
E) emit a very large amount of energy per second.

Question 14

One way we know this is an elliptical galaxy as opposed to a spiral galaxy is that the color is red as shown.

Accepted Answer

A) True 
 B)False

Question 15

Mathematical models indicate that ___________ galaxies are produced by high-speed collisions in which a smaller galaxy passes through another galaxy almost perpendicular to the disk of the galaxy.

Accepted Answer

A) ring 
B) spiral 
C) antenna 
D) irregular 
E) tidal tail 
A) ring 
B) spiral 
C) antenna 
D) irregular 
E) tidal tail

Question 16

The look-back time is numerically equal to the distance to a galaxy in light-years.

Accepted Answer

A) True 
 B)False

Question 17

The Milky Way galaxy is part of

Accepted Answer

A) the Virgo cluster. 
B) the Large Magellanic Cloud. 
C) the Small Magellanic Cloud. 
D) the Local Group. 
E) a rich cluster. 
A) the Virgo cluster. 
B) the Large Magellanic Cloud. 
C) the Small Magellanic Cloud. 
D) the Local Group. 
E) a rich cluster.

Question 18

-This star-like radio-quiet object shown above in visual wavelengths is actually a/an _____________.

Accepted Answer

A) elliptical galaxy 
B) spiral galaxy 
C) Seyfert 
D) quasar 
A) elliptical galaxy 
B) spiral galaxy 
C) Seyfert 
D) quasar

Question 19

If H equals 70 km/s/Mpc, then a galaxy with a radial velocity of 2100 km/s has a distance of approximately

Accepted Answer

A) 2170 Mpc. 
B) 2030 Mpc. 
C) 30 Mpc. 
D) 0.03 Mpc. 
E) 147,000 Mpc. 
A) 2170 Mpc. 
B) 2030 Mpc. 
C) 30 Mpc. 
D) 0.03 Mpc. 
E) 147,000 Mpc.

Question 20

What was the first evidence that quasars were different from astronomical objects before they were observed in visual wavelengths

Accepted Answer

A) The first quasars were seen to have fuzz. 
B) Quasars emitted radio energy like active galaxies, but appeared to be point sources in radio wavelengths. 
C) Quasars showed significant gravitational lens effects. 
D) The spectra of quasars looked like that of an M dwarf. 
E) The larger redshifts originally indicated that they were orbiting the center of the Milky Way. 
A) The first quasars were seen to have fuzz. 
B) Quasars emitted radio energy like active galaxies, but appeared to be point sources in radio wavelengths. 
C) Quasars showed significant gravitational lens effects. 
D) The spectra of quasars looked like that of an M dwarf. 
E) The larger redshifts originally indicated that they were orbiting the center of the Milky Way.

Some large clusters of galaxies do not appear to contain enough mass to hold themselves together.

The look-back time is

Gravitational lensing

in the following image, the ___ is the gravitational lens and the _ is the lensed object.

Why can't galaxy evolution go from elliptical to spiral to irregular

If the redshift of a quasar were 3, at what wavelength would the 486.1-nm line of hydrogen appear in the quasar's spectrum

-The above visual wavelength image of spectra (right panel) taken from a spiral galaxy (left panel) shows an emission line that is on the side that is rotating away and an emission line that is _ on the side that is rotating towards us.

Quasar redshifts are usually larger than the redshifts of the visible galaxies.

Evidence that tidal interactions and collisions of galaxies may make ordinary galaxies active is that

The above visual wavelength image is that of an S0 galaxy.

The above visual wavelength image of a small but very luminous star-like nucleus is an example of a Seyfert.

The above (enhanced) visual wavelength image indicates galactic cannibalism has occurred.

If the redshifts of quasars arise from the expansion of the universe yet they have brighter magnitudes than galaxies with the same redshifts, the quasar must

One way we know this is an elliptical galaxy as opposed to a spiral galaxy is that the color is red as shown.

Mathematical models indicate that ___________ galaxies are produced by high-speed collisions in which a smaller galaxy passes through another galaxy almost perpendicular to the disk of the galaxy.

The look-back time is numerically equal to the distance to a galaxy in light-years.

The Milky Way galaxy is part of

-This star-like radio-quiet object shown above in visual wavelengths is actually a/an _____________.

If H equals 70 km/s/Mpc, then a galaxy with a radial velocity of 2100 km/s has a distance of approximately

What was the first evidence that quasars were different from astronomical objects before they were observed in visual wavelengths

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

Some large clusters of galaxies do not appear to contain enough mass to hold themselves together.

The look-back time is

Gravitational lensing

in the following image, the _____________ is the gravitational lens and the ___________ is the lensed object.

Why can't galaxy evolution go from elliptical to spiral to irregular

If the redshift of a quasar were 3, at what wavelength would the 486.1-nm line of hydrogen appear in the quasar's spectrum

-The above visual wavelength image of spectra (right panel) taken from a spiral galaxy (left panel) shows an emission line that is__________ on the side that is rotating away and an emission line that is ___________ on the side that is rotating towards us.

Quasar redshifts are usually larger than the redshifts of the visible galaxies.

Evidence that tidal interactions and collisions of galaxies may make ordinary galaxies active is that

The above visual wavelength image is that of an S0 galaxy.

The above visual wavelength image of a small but very luminous star-like nucleus is an example of a Seyfert.

The above (enhanced) visual wavelength image indicates galactic cannibalism has occurred.

If the redshifts of quasars arise from the expansion of the universe yet they have brighter magnitudes than galaxies with the same redshifts, the quasar must

One way we know this is an elliptical galaxy as opposed to a spiral galaxy is that the color is red as shown.

Mathematical models indicate that ___________ galaxies are produced by high-speed collisions in which a smaller galaxy passes through another galaxy almost perpendicular to the disk of the galaxy.

The look-back time is numerically equal to the distance to a galaxy in light-years.

The Milky Way galaxy is part of

-This star-like radio-quiet object shown above in visual wavelengths is actually a/an _____________.

If H equals 70 km/s/Mpc, then a galaxy with a radial velocity of 2100 km/s has a distance of approximately

What was the first evidence that quasars were different from astronomical objects before they were observed in visual wavelengths

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

in the following image, the ___ is the gravitational lens and the _ is the lensed object.

-The above visual wavelength image of spectra (right panel) taken from a spiral galaxy (left panel) shows an emission line that is on the side that is rotating away and an emission line that is _ on the side that is rotating towards us.