Question 1

A white dwarf cools slowly into a _________________ dwarf.

Accepted Answer

The answer of A white dwarf cools slowly into a...

Question 2

The Crab nebula is

Accepted Answer

A) a planetary nebula. 
B) a Bok globule. 
C) an open cluster. 
D) an absorption nebula. 
E) a supernova remnant. 
A) a planetary nebula. 
B) a Bok globule. 
C) an open cluster. 
D) an absorption nebula. 
E) a supernova remnant.

Question 3

A supernova is almost always associated with

Accepted Answer

A) a very massive star. 
B) a very young star. 
C) a star undergoing helium flash. 
D) a white dwarf in a close binary system. 
E) a solar-like star that has exhausted its hydrogen and helium. 
A) a very massive star. 
B) a very young star. 
C) a star undergoing helium flash. 
D) a white dwarf in a close binary system. 
E) a solar-like star that has exhausted its hydrogen and helium.

Question 4

A white dwarf star is prevented from collapsing by

Accepted Answer

A) nuclear energy it is generating. 
B) its gravitational force. 
C) Hubble's law of extragalactic redshifts. 
D) degenerate electron gas pressure. 
E) degenerate astronomers observing the star. 
A) nuclear energy it is generating. 
B) its gravitational force. 
C) Hubble's law of extragalactic redshifts. 
D) degenerate electron gas pressure. 
E) degenerate astronomers observing the star.

Question 5

If the Sun and stars are supported by gas pressure, what supports a white dwarf

Accepted Answer

The answer of If the Sun and stars are supported...

Question 6

As a star like the Sun exhausts hydrogen in its core, the outer layers of the star

Accepted Answer

A) become hotter and more luminous. 
B) become cooler and more luminous. 
C) become hotter and less luminous. 
D) become cooler and less luminous. 
E) become larger in radius and hotter. 
A) become hotter and more luminous. 
B) become cooler and more luminous. 
C) become hotter and less luminous. 
D) become cooler and less luminous. 
E) become larger in radius and hotter.

Question 7

Mass can flow from one star in a binary system to its companion through the first ____________________ point.

Accepted Answer

The answer of Mass can flow from one star in...

Question 8

The helium flash is the cause of some supernovae.

Accepted Answer

A) True 
 B)False

Question 9

A white dwarf is composed of

Accepted Answer

A) hydrogen nuclei and degenerate electrons. 
B) helium nuclei and normal electrons. 
C) carbon and oxygen nuclei and degenerate electrons. 
D) degenerate iron nuclei. 
E) a helium burning core and a hydrogen burning shell. 
A) hydrogen nuclei and degenerate electrons. 
B) helium nuclei and normal electrons. 
C) carbon and oxygen nuclei and degenerate electrons. 
D) degenerate iron nuclei. 
E) a helium burning core and a hydrogen burning shell.

Question 10

Synchrotron radiation is produced

Accepted Answer

A) in planetary nebulae. 
B) by red dwarfs. 
C) in massive stars as their iron core collapses. 
D) in supernova. 
E) by neutrinos. 
A) in planetary nebulae. 
B) by red dwarfs. 
C) in massive stars as their iron core collapses. 
D) in supernova. 
E) by neutrinos.

Question 11

A planetary nebula is an example of a star no longer in hydrostatic equilibrium.

Accepted Answer

A) True 
 B)False

Question 12

Stars with masses between 0.4-   and 4-

Accepted Answer

A) undergo thermonuclear fusion of hydrogen and helium, but never get hot enough to ignite carbon. 
B) undergo thermonuclear fusion of hydrogen, but never get hot enough to ignite helium. 
C) produce type I supernovae after they exhaust their nuclear fuels. 
D) produce type II supernovae after they exhaust their nuclear fuels. 
E) undergo carbon detonation. 
A) undergo thermonuclear fusion of hydrogen and helium, but never get hot enough to ignite carbon. 
B) undergo thermonuclear fusion of hydrogen, but never get hot enough to ignite helium. 
C) produce type I supernovae after they exhaust their nuclear fuels. 
D) produce type II supernovae after they exhaust their nuclear fuels. 
E) undergo carbon detonation.

Question 13

The triple-alpha process

Accepted Answer

A) controls the pulsations in Cepheid variable stars. 
B) is the nuclear fusion of hydrogen to helium in massive stars. 
C) is the process that produces the neutrinos we receive from the Sun. 
D) requires a temperature of about 5,000,000 K to operate. 
E) occurs during helium flash. 
A) controls the pulsations in Cepheid variable stars. 
B) is the nuclear fusion of hydrogen to helium in massive stars. 
C) is the process that produces the neutrinos we receive from the Sun. 
D) requires a temperature of about 5,000,000 K to operate. 
E) occurs during helium flash.

Question 14

Why do many planetary nebulae show ring-like features on the sky instead of spheres

Accepted Answer

Asymmetry is the rule in planetary nebul

Question 15

The maximum mass of a white dwarf is ____________________ solar masses.

Accepted Answer

The answer of The maximum mass of a white dwarf...

Question 16

A planetary nebula is

Accepted Answer

A) the expelled outer atmosphere of a medium-mass star. 
B) produced by a supernova explosion. 
C) produced by a nova explosion. 
D) a nebula within which planets are forming. 
E) a cloud of hot gas surrounding a planet. 
A) the expelled outer atmosphere of a medium-mass star. 
B) produced by a supernova explosion. 
C) produced by a nova explosion. 
D) a nebula within which planets are forming. 
E) a cloud of hot gas surrounding a planet.

Question 17

Open clusters tend to be ____ than globular clusters.

Accepted Answer

A) younger and contain fewer stars 
B) younger and contain more stars 
C) older and contain fewer stars 
D) older and contain more stars 
E) more luminous and cooler 
A) younger and contain fewer stars 
B) younger and contain more stars 
C) older and contain fewer stars 
D) older and contain more stars 
E) more luminous and cooler

Question 18

For a star of Sun-like mass, what is the last stage of the nuclear fusion

Accepted Answer

A) Hydrogen to helium 
B) Helium to carbon and oxygen 
C) Carbon to magnesium 
D) Fusion goes all the way up to iron. 
A) Hydrogen to helium 
B) Helium to carbon and oxygen 
C) Carbon to magnesium 
D) Fusion goes all the way up to iron.

Question 19

From what part of the H-R diagram have the giants in a star cluster evolved

Accepted Answer

Masses that were on

Question 20

The energy a white dwarf emits into space is

Accepted Answer

A) replaced by fusion of hydrogen atoms into helium. 
B) replaced by fusion of helium atoms into carbon. 
C) not replaced. 
A) replaced by fusion of hydrogen atoms into helium. 
B) replaced by fusion of helium atoms into carbon. 
C) not replaced.

A white dwarf cools slowly into a _________________ dwarf.

The Crab nebula is

A supernova is almost always associated with

A white dwarf star is prevented from collapsing by

If the Sun and stars are supported by gas pressure, what supports a white dwarf

As a star like the Sun exhausts hydrogen in its core, the outer layers of the star

Mass can flow from one star in a binary system to its companion through the first ____________________ point.

The helium flash is the cause of some supernovae.

A white dwarf is composed of

Synchrotron radiation is produced

A planetary nebula is an example of a star no longer in hydrostatic equilibrium.

Stars with masses between 0.4- and 4-

The triple-alpha process

Why do many planetary nebulae show ring-like features on the sky instead of spheres

The maximum mass of a white dwarf is ____________________ solar masses.

A planetary nebula is

Open clusters tend to be ____ than globular clusters.

For a star of Sun-like mass, what is the last stage of the nuclear fusion

From what part of the H-R diagram have the giants in a star cluster evolved

The energy a white dwarf emits into space is

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A Users Guide to the Sky

Cycles of the Sun and Moon

The Origin of Modern Astronomy

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The Family of Stars

The Formation and Structure of Stars

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Galaxies: Normal and Active

Modern Cosmology

The Origin of the Solar System

Earth and Moon: Bases for Comparative Planetology

Mercury, Venus, and Mars

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Astrobiology: Life on Other Worlds

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Exam 10: The Deaths of Stars

A white dwarf cools slowly into a _________________ dwarf.

The Crab nebula is

A supernova is almost always associated with

A white dwarf star is prevented from collapsing by

If the Sun and stars are supported by gas pressure, what supports a white dwarf

As a star like the Sun exhausts hydrogen in its core, the outer layers of the star

Mass can flow from one star in a binary system to its companion through the first ____________________ point.

The helium flash is the cause of some supernovae.

A white dwarf is composed of

Synchrotron radiation is produced

A planetary nebula is an example of a star no longer in hydrostatic equilibrium.

Stars with masses between 0.4- and 4-

The triple-alpha process

Why do many planetary nebulae show ring-like features on the sky instead of spheres

The maximum mass of a white dwarf is ____________________ solar masses.

A planetary nebula is

Open clusters tend to be ____ than globular clusters.

For a star of Sun-like mass, what is the last stage of the nuclear fusion

From what part of the H-R diagram have the giants in a star cluster evolved

The energy a white dwarf emits into space is

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

Neutron Stars and Black Holes

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