Question 1

Elliptical galaxies contain a mix of old and young stars.

Accepted Answer

A) True 
 B)False

Question 2

_______________ are objects of known luminosity used for finding distances.

Accepted Answer

The answer of _______________ are objects of known luminosity used...

Question 3

Gravitational lensing is caused by ____.

Accepted Answer

A)  refraction of light through hot intracluster gas 
B)  stimulated emission of light passing through dark matter 
C)  acceleration of photons by supermassive black holes 
D)  scattering of photons off of thin intergalactic dust 
E)  bending of light rays due to the curvature of space-time around a mass 
A)  refraction of light through hot intracluster gas 
B)  stimulated emission of light passing through dark matter 
C)  acceleration of photons by supermassive black holes 
D)  scattering of photons off of thin intergalactic dust 
E)  bending of light rays due to the curvature of space-time around a mass

Question 4

Globular clusters can be used to estimate the distance to galaxies by measuring the clusters' ____.

Accepted Answer

A)  angular diameter 
B)  mass 
C)  orbital speed 
D)  age 
E)  recession velocity 
A)  angular diameter 
B)  mass 
C)  orbital speed 
D)  age 
E)  recession velocity

Question 5

Cepheids and globular clusters are limited in their ability to measure the distance to galaxies because they ____.

Accepted Answer

A)  are too rare 
B)  are not bright enough to detect at large distances 
C)  behave differently in other galaxies than they do in our own 
D)  do not appear in dwarf galaxies 
E)  are only found in elliptical galaxies 
A)  are too rare 
B)  are not bright enough to detect at large distances 
C)  behave differently in other galaxies than they do in our own 
D)  do not appear in dwarf galaxies 
E)  are only found in elliptical galaxies

Question 6

The diameter and luminosity of a galaxy do not determine its type.

Accepted Answer

A) True 
 B)False

Question 7

Rich galactic clusters ____.

Accepted Answer

A)  are rare, because galaxies are usually isolated in space 
B)  contain gas that is rich in metals 
C)  are composed of mostly elliptical galaxies 
D)  are very spread out, without a defined center 
E)  contain a wide variety of galaxy types and sizes 
A)  are rare, because galaxies are usually isolated in space 
B)  contain gas that is rich in metals 
C)  are composed of mostly elliptical galaxies 
D)  are very spread out, without a defined center 
E)  contain a wide variety of galaxy types and sizes

Question 8

Globular clusters can be used to measure the distance of nearby galaxies.

Accepted Answer

A) True 
 B)False

Question 9

"Starburst" events are a common outcome of galactic collisions.

Accepted Answer

A) True 
 B)False

Question 10

The farthest galaxies that astronomers have seen are all elliptical galaxies.

Accepted Answer

A) True 
 B)False

Question 11

A galaxy that has gone through many collisions and mergers must be a(n) _______________ galaxy.

Accepted Answer

The answer of A galaxy that has gone through many...

Question 12

_______________ galaxies have star formation, but no clear shape.

Accepted Answer

The answer of _______________ galaxies have star formation, but no...

Question 13

NASA's Hubble Deep Field images and GOODS program observations have shown that ____.

Accepted Answer

A)  there are large patchy regions of the sky covered with galaxies separated by empty areas 
B)  the entire sky is thickly covered with galaxies 
C)  galaxies can be found in all directions, but are relatively rare 
D)  galaxies are densely concentrated in a disk structure, which contains the Milky Way 
E)  galaxies are concentrated in two opposite directions on the sky, with very few in between 
A)  there are large patchy regions of the sky covered with galaxies separated by empty areas 
B)  the entire sky is thickly covered with galaxies 
C)  galaxies can be found in all directions, but are relatively rare 
D)  galaxies are densely concentrated in a disk structure, which contains the Milky Way 
E)  galaxies are concentrated in two opposite directions on the sky, with very few in between

Question 14

In order to calculate the size and luminosity of a galaxy, you must first determine its ____.

Accepted Answer

A)  age 
B)  mass 
C)  shape 
D)  metallicity 
E)  distance 
A)  age 
B)  mass 
C)  shape 
D)  metallicity 
E)  distance

Question 15

What is galactic cannibalism?

Accepted Answer

A large galaxy can pull materi

Exam 16: Galaxies

Elliptical galaxies contain a mix of old and young stars.

_______________ are objects of known luminosity used for finding distances.

Gravitational lensing is caused by ____.

Globular clusters can be used to estimate the distance to galaxies by measuring the clusters' ____.

Cepheids and globular clusters are limited in their ability to measure the distance to galaxies because they ____.

The diameter and luminosity of a galaxy do not determine its type.

Rich galactic clusters ____.

Globular clusters can be used to measure the distance of nearby galaxies.

"Starburst" events are a common outcome of galactic collisions.

The farthest galaxies that astronomers have seen are all elliptical galaxies.

A galaxy that has gone through many collisions and mergers must be a(n) _______________ galaxy.

_______________ galaxies have star formation, but no clear shape.

NASA's Hubble Deep Field images and GOODS program observations have shown that ____.

In order to calculate the size and luminosity of a galaxy, you must first determine its ____.

What is galactic cannibalism?

Here and Now

A Users Guide to the Sky

Moon Phases and Eclipses

Origins of Modern Astronomy

Gravity

Light and Telescopes

Atoms and Spectra

The Sun

The Family of Stars

The Interstellar Medium

Formation and Structure of Stars

Stellar Evolution

Deaths of Stars

Neutron Stars and Black Holes

The Milky Way Galaxy

Supermassive Black Holes and Active Galaxies

Modern Cosmology

Origin of the Solar System and Extrasolar Planets

Earth the Active Planet

The Moon and Mercury

Venus and Mars

Jupiter and Saturn

Uranus Neptune Pluto and the Kuiper Belt

Meteorites Asteroids and Comets

Astrobiology

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