Question 1

-If the above shown spiral galaxy is 150 million ly away, how fast is it receding

Accepted Answer

A) 32 km/s 
B) 320 km/s 
C) 3220 km/s 
D) -320 km/s 
A) 32 km/s 
B) 320 km/s 
C) 3220 km/s 
D) -320 km/s

Question 2

The negative velocity numbers in the following graph represent a galaxy that is moving away from us.

Accepted Answer

A) True 
 B)False

Question 3

A ___________ generally contains well over 1000 galaxies and is quite dense. They often contain many giant elliptical galaxies.

Accepted Answer

A) local group 
B) poor cluster 
C) rich cluster 
D) tidal tail 
E) quasar 
A) local group 
B) poor cluster 
C) rich cluster 
D) tidal tail 
E) quasar

Question 4

When a large galaxy collides with a small galaxy, the smaller galaxy may be pulled apart by tidal forces.

Accepted Answer

A) True 
 B)False

Question 5

Poor clusters of galaxies often contain an excess of E and S0 galaxies.

Accepted Answer

A) True 
 B)False

Question 6

-The above visual wavelength image is of a/an ____________-type galaxy.

Accepted Answer

A) S0 
B) elliptical 
C) barred spiral 
D) spiral (non-barred) 
A) S0 
B) elliptical 
C) barred spiral 
D) spiral (non-barred)

Question 7

A megaparsec is equivalent to

Accepted Answer

A) 3.26 light-years. 
B) 206,265 AU. 
C) the age of our solar system. 
D) a million parsecs. 
E) the diameter of the Milky Way galaxy. 
A) 3.26 light-years. 
B) 206,265 AU. 
C) the age of our solar system. 
D) a million parsecs. 
E) the diameter of the Milky Way galaxy.

Question 8

The high _______________ of quasars reveals to astronomers that they must be very distant.

Accepted Answer

The answer of The high _______________ of quasars reveals to...

Question 9

The rotation curve of a galaxy can be used to determine

Accepted Answer

A) the relative number of hot young stars in the galaxy. 
B) the relative amount of gas and dust in the galaxy. 
C) the radius of the galaxy. 
D) the luminosity of the galaxy. 
E) the mass of the galaxy. 
A) the relative number of hot young stars in the galaxy. 
B) the relative amount of gas and dust in the galaxy. 
C) the radius of the galaxy. 
D) the luminosity of the galaxy. 
E) the mass of the galaxy.

Question 10

_____________ galaxies have a definite disk component, but contain no evidence of spiral pattern, few hot young stars, and little gas and dust.

Accepted Answer

The answer of _____________ galaxies have a definite disk component,...

Question 11

From nearest to furthest from Earth, list the distance indicators and which type of object is best found at that distant indicator.

Accepted Answer

Radar ranging (Figure 6-9) is good for

Question 12

A mega-parsec (Mpc) is equivalent to

Accepted Answer

A) 3.26 light-years. 
B) 206,265 light years. 
C) 1,000,000 light years 
D) 3,260,000 light-years. 
E) the diameter of the Milky Way galaxy. 
A) 3.26 light-years. 
B) 206,265 light years. 
C) 1,000,000 light years 
D) 3,260,000 light-years. 
E) the diameter of the Milky Way galaxy.

Question 13

If a galaxy has a radial velocity of 8000 km/s and the Hubble constant is 70 km/s/Mpc, what is the distance to this galaxy

Accepted Answer

A) $8.75 × 10^3$ Mpc 
B) $2.4 × 10^9$ Mpc 
C) $5.6 × 10^5$ Mpc 
D) 114 Mpc 
E) $8.75 × 10^{-3}$ Mpc 
A) $8.75 × 10^3$ Mpc 
B) $2.4 × 10^9$ Mpc 
C) $5.6 × 10^5$ Mpc 
D) 114 Mpc 
E) $8.75 × 10^{-3}$ Mpc

Question 14

The rapid fluctuations of quasars show that the energy emitting portions of these objects must be very small.

Accepted Answer

A) True 
 B)False

Question 15

Many disk galaxies, such as Andromeda and the Milky Way, are thought to have extended halos of dark matter because the disk circular orbital speed is observed to ____________ increasing distances from the disk center.

Accepted Answer

A) stay constant with 
B) decrease with 
C) be totally absent at 
A) stay constant with 
B) decrease with 
C) be totally absent at

Question 16

It is believed that ring galaxies form

Accepted Answer

A) when two galaxies collide at high speeds. 
B) when two spiral galaxies collide, but not directly head on. 
C) from a large cloud of gas and dust with very little angular momentum. 
D) from a large cloud of gas and dust with a very high angular momentum. 
E) when more than two galaxies collide at the same time. 
A) when two galaxies collide at high speeds. 
B) when two spiral galaxies collide, but not directly head on. 
C) from a large cloud of gas and dust with very little angular momentum. 
D) from a large cloud of gas and dust with a very high angular momentum. 
E) when more than two galaxies collide at the same time.

Question 17

___________ are produced when two galaxies pass near each other and pull large streamers of stars, gas, and dust away from the galaxies.

Accepted Answer

A) Ring galaxies 
B) Spiral galaxies 
C) Rotation curves 
D) Tidal tails 
E) Irregular galaxies 
A) Ring galaxies 
B) Spiral galaxies 
C) Rotation curves 
D) Tidal tails 
E) Irregular galaxies

Question 18

Measuring the Doppler shift of material at various distances from the center of a galaxy can be used to construct a(n) ________________ for that galaxy.

Accepted Answer

The answer of Measuring the Doppler shift of material at...

Question 19

If H equals 50 km/s/Mpc, then a galaxy with a radial velocity of 50,000 km/s will have a distance of about 1 Mpc.

Accepted Answer

A) True 
 B)False

Question 20

Elliptical galaxies contain more gas, dust, and young stars than do Sa galaxies.

Accepted Answer

A) True 
 B)False

-If the above shown spiral galaxy is 150 million ly away, how fast is it receding

The negative velocity numbers in the following graph represent a galaxy that is moving away from us.

A ___________ generally contains well over 1000 galaxies and is quite dense. They often contain many giant elliptical galaxies.

When a large galaxy collides with a small galaxy, the smaller galaxy may be pulled apart by tidal forces.

Poor clusters of galaxies often contain an excess of E and S0 galaxies.

-The above visual wavelength image is of a/an ____________-type galaxy.

A megaparsec is equivalent to

The high _______________ of quasars reveals to astronomers that they must be very distant.

The rotation curve of a galaxy can be used to determine

_____________ galaxies have a definite disk component, but contain no evidence of spiral pattern, few hot young stars, and little gas and dust.

From nearest to furthest from Earth, list the distance indicators and which type of object is best found at that distant indicator.

A mega-parsec (Mpc) is equivalent to

If a galaxy has a radial velocity of 8000 km/s and the Hubble constant is 70 km/s/Mpc, what is the distance to this galaxy

The rapid fluctuations of quasars show that the energy emitting portions of these objects must be very small.

Many disk galaxies, such as Andromeda and the Milky Way, are thought to have extended halos of dark matter because the disk circular orbital speed is observed to ____________ increasing distances from the disk center.

It is believed that ring galaxies form

___________ are produced when two galaxies pass near each other and pull large streamers of stars, gas, and dust away from the galaxies.

Measuring the Doppler shift of material at various distances from the center of a galaxy can be used to construct a(n) ________________ for that galaxy.

If H equals 50 km/s/Mpc, then a galaxy with a radial velocity of 50,000 km/s will have a distance of about 1 Mpc.

Elliptical galaxies contain more gas, dust, and young stars than do Sa galaxies.

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

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Exam 13: Galaxies: Normal and Active

-If the above shown spiral galaxy is 150 million ly away, how fast is it receding

The negative velocity numbers in the following graph represent a galaxy that is moving away from us.

A ___________ generally contains well over 1000 galaxies and is quite dense. They often contain many giant elliptical galaxies.

When a large galaxy collides with a small galaxy, the smaller galaxy may be pulled apart by tidal forces.

Poor clusters of galaxies often contain an excess of E and S0 galaxies.

-The above visual wavelength image is of a/an ____________-type galaxy.

A megaparsec is equivalent to

The high _______________ of quasars reveals to astronomers that they must be very distant.

The rotation curve of a galaxy can be used to determine

_____________ galaxies have a definite disk component, but contain no evidence of spiral pattern, few hot young stars, and little gas and dust.

From nearest to furthest from Earth, list the distance indicators and which type of object is best found at that distant indicator.

A mega-parsec (Mpc) is equivalent to

If a galaxy has a radial velocity of 8000 km/s and the Hubble constant is 70 km/s/Mpc, what is the distance to this galaxy

The rapid fluctuations of quasars show that the energy emitting portions of these objects must be very small.

Many disk galaxies, such as Andromeda and the Milky Way, are thought to have extended halos of dark matter because the disk circular orbital speed is observed to ____________ increasing distances from the disk center.

It is believed that ring galaxies form

___________ are produced when two galaxies pass near each other and pull large streamers of stars, gas, and dust away from the galaxies.

Measuring the Doppler shift of material at various distances from the center of a galaxy can be used to construct a(n) ________________ for that galaxy.

If H equals 50 km/s/Mpc, then a galaxy with a radial velocity of 50,000 km/s will have a distance of about 1 Mpc.

Elliptical galaxies contain more gas, dust, and young stars than do Sa galaxies.

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