Question 1

Neutron stars were first discovered in the 1930's.

Accepted Answer

A) True 
 B)False

Question 2

Unseen objects in our galaxy have been found by the bending effect they have on more distant stars' light passing near them. These small objects that don't emit light are calculated to have masses of about 10* the mass of the sun. Which is the best choice for these objects?

Accepted Answer

A)  black hole 
B)  neutron star 
C)  white dwarf 
D)  main-sequence stars 
A)  black hole 
B)  neutron star 
C)  white dwarf 
D)  main-sequence stars

Question 3

Which of the kinds of stars below would you expect to find in a 11-billion-year-old globular cluster of stars?

Accepted Answer

A)  cool, low luminosity main sequence stars 
B)  white dwarfs 
C)  neutron stars 
D)  red giants 
E)  all of the above 
A)  cool, low luminosity main sequence stars 
B)  white dwarfs 
C)  neutron stars 
D)  red giants 
E)  all of the above

Question 4

The escape velocity of an object depends on

Accepted Answer

A)  I, II, III, & IV 
B)  I & II 
C)  I & III 
D)  I, II, & IV 
E)  I, III, & IV 
A)  I, II, III, & IV 
B)  I & II 
C)  I & III 
D)  I, II, & IV 
E)  I, III, & IV

Question 5

The event horizon

Accepted Answer

A)  is believed to be a singularity. 
B)  is a crystalline layer. 
C)  has a radius equal to the Schwarzschild radius. 
D)  marks the inner boundary of a planetary nebula. 
E)  is located at the point where synchrotron radiation is created around a pulsar. 
A)  is believed to be a singularity. 
B)  is a crystalline layer. 
C)  has a radius equal to the Schwarzschild radius. 
D)  marks the inner boundary of a planetary nebula. 
E)  is located at the point where synchrotron radiation is created around a pulsar.

Question 6

A ____ has a radius of about 10 km and is supported by the pressure associated with degenerate neutrons.

Accepted Answer

A)  black hole 
B)  neutron star 
C)  white dwarf 
D)  supernova remnant 
E)  red dwarf 
A)  black hole 
B)  neutron star 
C)  white dwarf 
D)  supernova remnant 
E)  red dwarf

Question 7

Why don't all supernova remnants contain pulsars?

Accepted Answer

A)  All supernova remnants do contain pulsars. 
B)  Some supernova explosions form white dwarfs instead of the neutron stars necessary for pulsars. 
C)  Pulsars slow down and quit producing the pulses before the supernova remnant dissipates. 
D)  The pulsar may be tipped so that the beams do not sweep past Earth. 
E)  b and c above. 
A)  All supernova remnants do contain pulsars. 
B)  Some supernova explosions form white dwarfs instead of the neutron stars necessary for pulsars. 
C)  Pulsars slow down and quit producing the pulses before the supernova remnant dissipates. 
D)  The pulsar may be tipped so that the beams do not sweep past Earth. 
E)  b and c above.

Question 8

What evidence do we have that pulsars are neutron stars?

Accepted Answer

The answer of What evidence do we have that pulsars...

Question 9

What observational evidence do we have that black holes exist?

Accepted Answer

The answer of What observational evidence do we have that...

Question 10

Observations from the Compton Gamma Ray Observatory showed that gamma-ray bursters were located throughout the sky. This told us that

Accepted Answer

A)  the bursts were not produced among stars in the disk of our galaxy. 
B)  the bursts were not produced among stars in the nuclear bulge of our galaxy. 
C)  the bursts are not associated with planets in our solar system. 
D)  the bursts were not produced in our sun. 
E)  all of the above. 
A)  the bursts were not produced among stars in the disk of our galaxy. 
B)  the bursts were not produced among stars in the nuclear bulge of our galaxy. 
C)  the bursts are not associated with planets in our solar system. 
D)  the bursts were not produced in our sun. 
E)  all of the above.

Question 11

The event horizon marks the boundary within which the density is roughly the same as that of the atomic nucleus.

Accepted Answer

A) True 
 B)False

Question 12

The first pulsar was discovered by ____ in November of 1967.

Accepted Answer

A)  Jocelyn Bell 
B)  Isaac Newton 
C)  Albert Einstein 
D)  Walter Baade 
E)  Edwin Hubble 
A)  Jocelyn Bell 
B)  Isaac Newton 
C)  Albert Einstein 
D)  Walter Baade 
E)  Edwin Hubble

Question 13

Neutron stars have densities roughly the same as that of the atomic nucleus.

Accepted Answer

A) True 
 B)False

Question 14

The peculiar system SS 433

Accepted Answer

A)  I 
B)  III 
C)  II & III 
D)  I, II, & III 
E)  I, II, III, & IV 
A)  I 
B)  III 
C)  II & III 
D)  I, II, & III 
E)  I, II, III, & IV

Question 15

In A.D. 1054, Chinese astronomers observed the appearance of a new star, whose location is now occupied by

Accepted Answer

A)  a pulsar. 
B)  a neutron star. 
C)  a supernova remnant. 
D)  all of the above. 
A)  a pulsar. 
B)  a neutron star. 
C)  a supernova remnant. 
D)  all of the above.

Question 16

An isolated black hole in empty intergalactic space would be difficult to detect because

Accepted Answer

A)  there would be no stars behind it whose light would be affected by gravitational lensing. 
B)  it could not emit light from inside its event horizon. 
C)  no companion stars would be affected by its gravitational field. 
D)  no matter would be falling into it to create an X-ray-emitting accretion disk. 
E)  all of the above. 
A)  there would be no stars behind it whose light would be affected by gravitational lensing. 
B)  it could not emit light from inside its event horizon. 
C)  no companion stars would be affected by its gravitational field. 
D)  no matter would be falling into it to create an X-ray-emitting accretion disk. 
E)  all of the above.

Question 17

LMC X-3 is a binary system that is believed to contain a black hole.

Accepted Answer

A) True 
 B)False

Question 18

Which of the following can you never know about a black hole?

Accepted Answer

A)  mass 
B)  rotation 
C)  electrical charge 
D)  the elements of the material that has fallen in 
A)  mass 
B)  rotation 
C)  electrical charge 
D)  the elements of the material that has fallen in

Question 19

The density of a ____ is greater than the density of a ____.

Accepted Answer

A)  white dwarf; neutron star 
B)  neutron star; black hole 
C)  pulsar; neutron star 
D)  pulsar; white dwarf 
E)  white dwarf; black hole 
A)  white dwarf; neutron star 
B)  neutron star; black hole 
C)  pulsar; neutron star 
D)  pulsar; white dwarf 
E)  white dwarf; black hole

Question 20

How are neutron stars and white dwarfs similar?

Accepted Answer

The answer of How are neutron stars and white dwarfs...

Neutron stars were first discovered in the 1930's.

Unseen objects in our galaxy have been found by the bending effect they have on more distant stars' light passing near them. These small objects that don't emit light are calculated to have masses of about 10* the mass of the sun. Which is the best choice for these objects?

Which of the kinds of stars below would you expect to find in a 11-billion-year-old globular cluster of stars?

The escape velocity of an object depends on

The event horizon

A ____ has a radius of about 10 km and is supported by the pressure associated with degenerate neutrons.

Why don't all supernova remnants contain pulsars?

What evidence do we have that pulsars are neutron stars?

What observational evidence do we have that black holes exist?

Observations from the Compton Gamma Ray Observatory showed that gamma-ray bursters were located throughout the sky. This told us that

The event horizon marks the boundary within which the density is roughly the same as that of the atomic nucleus.

The first pulsar was discovered by ____ in November of 1967.

Neutron stars have densities roughly the same as that of the atomic nucleus.

The peculiar system SS 433

In A.D. 1054, Chinese astronomers observed the appearance of a new star, whose location is now occupied by

An isolated black hole in empty intergalactic space would be difficult to detect because

LMC X-3 is a binary system that is believed to contain a black hole.

Which of the following can you never know about a black hole?

The density of a is greater than the density of a .

How are neutron stars and white dwarfs similar?

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

The Milky Way Galaxy

Galaxies: Normal and Active

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 11: Neutron Stars and Black Holes

Neutron stars were first discovered in the 1930's.

Unseen objects in our galaxy have been found by the bending effect they have on more distant stars' light passing near them. These small objects that don't emit light are calculated to have masses of about 10* the mass of the sun. Which is the best choice for these objects?

Which of the kinds of stars below would you expect to find in a 11-billion-year-old globular cluster of stars?

The escape velocity of an object depends on

The event horizon

A ____ has a radius of about 10 km and is supported by the pressure associated with degenerate neutrons.

Why don't all supernova remnants contain pulsars?

What evidence do we have that pulsars are neutron stars?

What observational evidence do we have that black holes exist?

Observations from the Compton Gamma Ray Observatory showed that gamma-ray bursters were located throughout the sky. This told us that

The event horizon marks the boundary within which the density is roughly the same as that of the atomic nucleus.

The first pulsar was discovered by ____ in November of 1967.

Neutron stars have densities roughly the same as that of the atomic nucleus.

The peculiar system SS 433

In A.D. 1054, Chinese astronomers observed the appearance of a new star, whose location is now occupied by

An isolated black hole in empty intergalactic space would be difficult to detect because

LMC X-3 is a binary system that is believed to contain a black hole.

Which of the following can you never know about a black hole?

The density of a ____ is greater than the density of a ____.

How are neutron stars and white dwarfs similar?

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

The Milky Way Galaxy

Galaxies: Normal and Active

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

The density of a is greater than the density of a .