Question 1

A stellar core with a mass greater than 3 solar masses will collapse until it reaches _____.

Accepted Answer

A)  the radiusof Earth 
B)  the radius of Mt. Everest 
C)  the radius of a grain of sand. 
D)  the radius of a helium atom 
E)  a radius of zero 
A)  the radiusof Earth 
B)  the radius of Mt. Everest 
C)  the radius of a grain of sand. 
D)  the radius of a helium atom 
E)  a radius of zero

Question 2

A black hole is _____.

Accepted Answer

A)  an object so dense that light cannot escape its surface 
B)  a neutron star that has exceeded the Chandrasekhar limit 
C)  a theoretical model that has never been observed 
D)  an observed object that is not well understood 
E)  the result of a neutron star merger 
A)  an object so dense that light cannot escape its surface 
B)  a neutron star that has exceeded the Chandrasekhar limit 
C)  a theoretical model that has never been observed 
D)  an observed object that is not well understood 
E)  the result of a neutron star merger

Question 3

When viewed from nearby, a black hole in empty space _____.

Accepted Answer

A)  has a funnel shape, extending to the event horizon 
B)  glows in X-rays and gamma-rays from superheated surface 
C)  is invisible 
D)  would look like a dark sphere the size of Earth 
E)  emits blackbody radiation only 
A)  has a funnel shape, extending to the event horizon 
B)  glows in X-rays and gamma-rays from superheated surface 
C)  is invisible 
D)  would look like a dark sphere the size of Earth 
E)  emits blackbody radiation only

Question 4

Many pulsars are not associated with supernova remnants.

Accepted Answer

A) True 
 B)False

Question 5

Astronomers detect _______________ of ionized gas moving perpendicular to the plane of many accretion disks.

Accepted Answer

The answer of Astronomers detect _______________ of ionized gas moving...

Question 6

Supernova remnants _____.

Accepted Answer

A)  always contain pulsars, because pulsars supply the ionizing radiation 
B)  often last longer than a pulsar does, so the central pulsar may no longer be visible 
C)  rarely contain pulsars, because pulsar radiation disrupts the remnant 
D)  may not contain a pulsar, if the supernova explosion kicked the pulsar away at high speed 
E)  never contain pulsars 
A)  always contain pulsars, because pulsars supply the ionizing radiation 
B)  often last longer than a pulsar does, so the central pulsar may no longer be visible 
C)  rarely contain pulsars, because pulsar radiation disrupts the remnant 
D)  may not contain a pulsar, if the supernova explosion kicked the pulsar away at high speed 
E)  never contain pulsars

Question 7

Jets are composed of matter and antimatter produced in the poles of a compact object.

Accepted Answer

A) True 
 B)False

Question 8

Any compact object with a mass greater than _______________ solar masses must form a black hole.

Accepted Answer

The answer of Any compact object with a mass greater...

Question 9

A neutron star must have a mass greater than 2.4 solar masses.

Accepted Answer

A) True 
 B)False

A stellar core with a mass greater than 3 solar masses will collapse until it reaches _____.

A black hole is _____.

When viewed from nearby, a black hole in empty space _____.

Many pulsars are not associated with supernova remnants.

Astronomers detect _______________ of ionized gas moving perpendicular to the plane of many accretion disks.

Supernova remnants _____.

Jets are composed of matter and antimatter produced in the poles of a compact object.

Any compact object with a mass greater than _______________ solar masses must form a black hole.

A neutron star must have a mass greater than 2.4 solar masses.

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

The Milky Way Galaxy

Galaxies

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

Filters

Exam 14: Neutron Stars and Black Holes

A stellar core with a mass greater than 3 solar masses will collapse until it reaches _____.

A black hole is _____.

When viewed from nearby, a black hole in empty space _____.

Many pulsars are not associated with supernova remnants.

Astronomers detect _______________ of ionized gas moving perpendicular to the plane of many accretion disks.

Supernova remnants _____.

Jets are composed of matter and antimatter produced in the poles of a compact object.

Any compact object with a mass greater than _______________ solar masses must form a black hole.

A neutron star must have a mass greater than 2.4 solar masses.

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

The Milky Way Galaxy

Galaxies

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

Filters