Question 1

____________________ can be used to determine the distance to a star when the spectrum of the star can be used to determine its spectral type and luminosity class.

Accepted Answer

Spectrosco

Question 2

Compared with the spectral lines in the solar spectrum, lines in a supergiant spectrum are

Accepted Answer

A)  sharper. 
B)  broader. 
C)  weaker. 
D)  stronger. 
E)  broader and weaker. 
A)  sharper. 
B)  broader. 
C)  weaker. 
D)  stronger. 
E)  broader and weaker.

Question 3

Reorder the spectral sequence to include the L and T dwarfs. What is the new sequence?

Accepted Answer

The answer of Reorder the spectral sequence to include the...

Question 4

Compared with the spectral lines in the solar spectrum, lines in a supergiant star's spectrum are

Accepted Answer

A)  more narrow. 
B)  broader. 
C)  weaker. 
D)  stronger. 
E)  broader and weaker. 
A)  more narrow. 
B)  broader. 
C)  weaker. 
D)  stronger. 
E)  broader and weaker.

Question 5

The star named Sheat is of M2 II spectral type and luminosity class. Based on this information, which of the following are true?
I. Sheat has a surface temperature less than the Sun.
II. Sheat has a diameter that is greater than that of the Sun.
III. Sheat is more luminous than the Sun.
IV. Sheat is located near the upper left-hand corner in the H-R diagram.

Accepted Answer

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

Question 6

We know that giant stars are larger in diameter than the Sun because

Accepted Answer

A)  they are more luminous but have about the same temperature. 
B)  they are less luminous but have about the same temperature. 
C)  they are hotter but have about the same luminosity. 
D)  they are cooler but have about the same luminosity. 
E)  they have a larger absolute magnitude than the Sun. 
A)  they are more luminous but have about the same temperature. 
B)  they are less luminous but have about the same temperature. 
C)  they are hotter but have about the same luminosity. 
D)  they are cooler but have about the same luminosity. 
E)  they have a larger absolute magnitude than the Sun.

Question 7

A star's absolute magnitude depends only on the star's

Accepted Answer

A)  distance and diameter. 
B)  temperature and distance. 
C)  distance. 
D)  temperature and diameter. 
E)  apparent magnitude. 
A)  distance and diameter. 
B)  temperature and distance. 
C)  distance. 
D)  temperature and diameter. 
E)  apparent magnitude.

Question 8

-Table 8-2 Use the chart below to answer the following question(s).
Which star in Table 8-2 is the closest to Earth?

Accepted Answer

A)  δ Cen 
B)  HR 4607 
C)  HR 4758 
D)  HD 39801 
E)  9 CMa 
A)  δ Cen 
B)  HR 4607 
C)  HR 4758 
D)  HD 39801 
E)  9 CMa

Question 9

Which graphs of line strength and temperature would give the most precise value of the star's surface temperature?

Accepted Answer

A)  a 
B)  b 
C)  c 
D)  All of the graphs would yield the same precise result. 
A)  a 
B)  b 
C)  c 
D)  All of the graphs would yield the same precise result.

Question 10

The Moon orbits the Earth the Earth orbits the Sun. If the Earth-moon system is ˜1 AU from the Sun and takes ˜1 Earth year to orbit, what is the combined mass of the triple system? Express your answer in solar mass units.

Accepted Answer

A)  1 
B)  1.1 
C)  1.2 
D)  1.3 
A)  1 
B)  1.1 
C)  1.2 
D)  1.3

Question 11

In the H-R diagram, roughly 80 percent of all stars are

Accepted Answer

A)  in the giant region. 
B)  in the supergiant region. 
C)  among the B stars. 
D)  among the G stars. 
E)  on the main sequence. 
A)  in the giant region. 
B)  in the supergiant region. 
C)  among the B stars. 
D)  among the G stars. 
E)  on the main sequence.

Question 12

Hadar has an apparent visual magnitude of 0.6 and an absolute visual magnitude of -5.4. Its distance is 102.2 pc.

Accepted Answer

A) True 
 B)False

Question 13

If a star is twice as hot as the Sun and only half the Sun's diameter, it will be less luminous than the Sun.

Accepted Answer

A) True 
 B)False

Question 14

Stars in the upper right part of the Hertzsprung-Russell diagram are always ____ when compared to stars near the middle of the diagram.

Accepted Answer

A)  cooler 
B)  brighter as seen from Earth 
C)  larger 
D)  smaller 
E)  more massive 
A)  cooler 
B)  brighter as seen from Earth 
C)  larger 
D)  smaller 
E)  more massive

Question 15

As shown in the spectra above, sodium is present in _________ spectral classes.

Accepted Answer

A)  M0 
B)  K0 
C)  G1 
D)  All of the other choices are correct. 
A)  M0 
B)  K0 
C)  G1 
D)  All of the other choices are correct.

Question 16

We know that the numbers of stars _________ from _______ to ________ on the H-R diagram.

Accepted Answer

A)  increases, upper right, lower left 
B)  decreases, upper left, lower right 
C)  increases, upper left, lower right 
D)  decreases, upper right, lower left 
A)  increases, upper right, lower left 
B)  decreases, upper left, lower right 
C)  increases, upper left, lower right 
D)  decreases, upper right, lower left

Question 17

If two stars are emitting the same amount of light and are the same size, the star that is farther will appear

Accepted Answer

A)  brighter. 
B)  dimmer. 
C)  redder. 
D)  bluer. 
E)  They will have the same brightness as seen from Earth. 
A)  brighter. 
B)  dimmer. 
C)  redder. 
D)  bluer. 
E)  They will have the same brightness as seen from Earth.

Question 18

To observe a visual binary, we must measure radial velocities.

Accepted Answer

A) True 
 B)False

Question 19

At what point in the light curve below is the cooler star in front of the hotter star of an eclipsing binary system?
​  
​

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  5 
A)  1 
B)  2 
C)  3 
D)  4 
E)  5

Question 20

If we can solve the orbital motion of an eclipsing binary, we can find

Accepted Answer

A)  the mass of each star. 
B)  the diameter of each star. 
C)  the distance to the binary. 
D)  all of the other choices. 
E)  the mass of each star and the diameter of each star. 
A)  the mass of each star. 
B)  the diameter of each star. 
C)  the distance to the binary. 
D)  all of the other choices. 
E)  the mass of each star and the diameter of each star.

____________________ can be used to determine the distance to a star when the spectrum of the star can be used to determine its spectral type and luminosity class.

Compared with the spectral lines in the solar spectrum, lines in a supergiant spectrum are

Reorder the spectral sequence to include the L and T dwarfs. What is the new sequence?

Compared with the spectral lines in the solar spectrum, lines in a supergiant star's spectrum are

We know that giant stars are larger in diameter than the Sun because

A star's absolute magnitude depends only on the star's

-Table 8-2 Use the chart below to answer the following question(s). Which star in Table 8-2 is the closest to Earth?

Which graphs of line strength and temperature would give the most precise value of the star's surface temperature?

The Moon orbits the Earth the Earth orbits the Sun. If the Earth-moon system is ˜1 AU from the Sun and takes ˜1 Earth year to orbit, what is the combined mass of the triple system? Express your answer in solar mass units.

In the H-R diagram, roughly 80 percent of all stars are

Hadar has an apparent visual magnitude of 0.6 and an absolute visual magnitude of -5.4. Its distance is 10^2.2 pc.

If a star is twice as hot as the Sun and only half the Sun's diameter, it will be less luminous than the Sun.

Stars in the upper right part of the Hertzsprung-Russell diagram are always ____ when compared to stars near the middle of the diagram.

As shown in the spectra above, sodium is present in _________ spectral classes.

We know that the numbers of stars _____ from _ to ______ on the H-R diagram.

If two stars are emitting the same amount of light and are the same size, the star that is farther will appear

To observe a visual binary, we must measure radial velocities.

At what point in the light curve below is the cooler star in front of the hotter star of an eclipsing binary system?

If we can solve the orbital motion of an eclipsing binary, we can find

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 Formation and Structure of Stars

The Deaths of Stars

Neutron Stars and Black Holes

The Milky Way Galaxy

Galaxies: Normal and Active

Modern Cosmology

Origin of the Solar System and Extrasolar Planets

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 8: The Family of Stars

____________________ can be used to determine the distance to a star when the spectrum of the star can be used to determine its spectral type and luminosity class.

Compared with the spectral lines in the solar spectrum, lines in a supergiant spectrum are

Reorder the spectral sequence to include the L and T dwarfs. What is the new sequence?

Compared with the spectral lines in the solar spectrum, lines in a supergiant star's spectrum are

We know that giant stars are larger in diameter than the Sun because

A star's absolute magnitude depends only on the star's

-Table 8-2 Use the chart below to answer the following question(s). Which star in Table 8-2 is the closest to Earth?

Which graphs of line strength and temperature would give the most precise value of the star's surface temperature?

The Moon orbits the Earth the Earth orbits the Sun. If the Earth-moon system is ˜1 AU from the Sun and takes ˜1 Earth year to orbit, what is the combined mass of the triple system? Express your answer in solar mass units.

In the H-R diagram, roughly 80 percent of all stars are

Hadar has an apparent visual magnitude of 0.6 and an absolute visual magnitude of -5.4. Its distance is 102.2 pc.

If a star is twice as hot as the Sun and only half the Sun's diameter, it will be less luminous than the Sun.

Stars in the upper right part of the Hertzsprung-Russell diagram are always ____ when compared to stars near the middle of the diagram.

As shown in the spectra above, sodium is present in _________ spectral classes.

We know that the numbers of stars _________ from _______ to ________ on the H-R diagram.

If two stars are emitting the same amount of light and are the same size, the star that is farther will appear

To observe a visual binary, we must measure radial velocities.

At what point in the light curve below is the cooler star in front of the hotter star of an eclipsing binary system? ​ ​

If we can solve the orbital motion of an eclipsing binary, we can find

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 Formation and Structure of Stars

The Deaths of Stars

Neutron Stars and Black Holes

The Milky Way Galaxy

Galaxies: Normal and Active

Modern Cosmology

Origin of the Solar System and Extrasolar Planets

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

Hadar has an apparent visual magnitude of 0.6 and an absolute visual magnitude of -5.4. Its distance is 10^2.2 pc.

We know that the numbers of stars _____ from _ to ______ on the H-R diagram.

At what point in the light curve below is the cooler star in front of the hotter star of an eclipsing binary system?