Question 1

Why is it difficult to decide how common hot stars are?

Accepted Answer

Determining the prevalence of hot stars

Question 2

In an H-R diagram, stars with the smallest radius are found in the ____ of the diagram.

Accepted Answer

A)  center 
B)  upper left corner 
C)  upper right corner 
D)  lower left corner 
E)  lower right corner 
A)  center 
B)  upper left corner 
C)  upper right corner 
D)  lower left corner 
E)  lower right corner

Question 3

At what point in the light curve below is the cooler star in front of the hotter star?

Accepted Answer

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

Question 4

The parallax of the star 75 Leo is 0.10 and its apparent visual magnitude is +5.18. The absolute visual magnitude of 75 Leo is ____________________.

Accepted Answer

The answer of The parallax of the star 75 Leo...

Question 5

The star named Circini has the spectral type and luminosity class of O 8.5 V. Based on this information, which of the following are true?

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

Groombridge 34 is an M1 V star. Based on this information, which of the following are true?

Accepted Answer

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

Question 7

Describe the measurements needed to determine the orbit of a visual binary star.

Accepted Answer

The answer of Describe the measurements needed to determine the...

Question 8

Describe two methods that could be used to determine the temperature of a star.

Accepted Answer

The answer of Describe two methods that could be used...

Question 9

Table 8-1
Use the chart below to answer the following question(s).
  
-From the data given,, which star in Table 8-1 has the greatest diameter?

Accepted Answer

A)  65 Tau 
B)  HR 4621 
C)  ($\alpha$ Pic) 
D)  58 Ori 
E)  HR 2491 
A)  65 Tau 
B)  HR 4621 
C)  ($\alpha$ Pic) 
D)  58 Ori 
E)  HR 2491

Question 10

In the light curve below, what is the period of the eclipsing binary?

Accepted Answer

A)  5 days 
B)  32.5 days 
C)  7.5 days 
D)  42.5 days 
E)  50 days 
A)  5 days 
B)  32.5 days 
C)  7.5 days 
D)  42.5 days 
E)  50 days

Question 11

Diagram 8-1
Use the H-R diagram below to answer the following question(s).  
-Which star in Diagram 8-1 has the greatest surface temperature?

Accepted Answer

A)  Alnilam 
B)  Antares 
C)  Arcturus 
D)  HR 5337 
E)  Sirius B 
A)  Alnilam 
B)  Antares 
C)  Arcturus 
D)  HR 5337 
E)  Sirius B

Question 12

The diagram below shows the radial velocity curve of a double-line spectroscopic binary. Based on this radial velocity curve, which of the following statements is correct?

Accepted Answer

A)  Star A is twice the mass of star B. 
B)  Star B is twice the mass of star A. 
C)  Star A is ten times the mass of star B. 
D)  Star B is ten times the mass of star A. 
E)  Star A and Star B have the same mass. 
A)  Star A is twice the mass of star B. 
B)  Star B is twice the mass of star A. 
C)  Star A is ten times the mass of star B. 
D)  Star B is ten times the mass of star A. 
E)  Star A and Star B have the same mass.

Question 13

The best sample of the true numbers of the different types of stars consists of

Accepted Answer

A)  stars that appear brightest in the sky to an observer on Earth. 
B)  all of the stars within our solar system. 
C)  all the stars within a given distance from Earth. 
A)  stars that appear brightest in the sky to an observer on Earth. 
B)  all of the stars within our solar system. 
C)  all the stars within a given distance from Earth.

Question 14

____________________ 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 15

Why don't we see hydrogen Balmer lines in the spectra of stars with temperatures of 3,200 K?

Accepted Answer

A)  There is no hydrogen in stars this cool. 
B)  The stars are hot enough that most of the hydrogen is ionized and the atoms cannot absorb energy. 
C)  These stars are so cool that nearly all of the hydrogen atoms are in the ground state. 
D)  Stars of this temperature are too cool to produce an absorption spectrum. 
E)  Stars of this temperature are too hot to produce an absorption spectrum. 
A)  There is no hydrogen in stars this cool. 
B)  The stars are hot enough that most of the hydrogen is ionized and the atoms cannot absorb energy. 
C)  These stars are so cool that nearly all of the hydrogen atoms are in the ground state. 
D)  Stars of this temperature are too cool to produce an absorption spectrum. 
E)  Stars of this temperature are too hot to produce an absorption spectrum.

Question 16

The luminosity of a star is the total amount of energy it radiates each second.

Accepted Answer

A) True 
 B)False

Question 17

The most common stars are

Accepted Answer

A)  supergiants. 
B)  giants. 
C)  upper (more luminous) main-sequence stars. 
D)  white dwarfs. 
E)  lower (less luminous) main-sequence stars. 
A)  supergiants. 
B)  giants. 
C)  upper (more luminous) main-sequence stars. 
D)  white dwarfs. 
E)  lower (less luminous) main-sequence stars.

Question 18

We know the white dwarf star Sirius B has a mass comparable to the sun because

Accepted Answer

A)  of its measured color. 
B)  of its measured temperature compared to Sirius A. 
C)  it is part of binary star system with Sirius A. 
A)  of its measured color. 
B)  of its measured temperature compared to Sirius A. 
C)  it is part of binary star system with Sirius A.

Question 19

How does the luminosity depend on temperature for stars of the same size?

Accepted Answer

The answer of How does the luminosity depend on temperature...

Question 20

A spectroscopic binary shows periodic variations in its

Accepted Answer

A)  radial velocity. 
B)  proper motion. 
C)  brightness. 
D)  mass. 
E)  spectral type. 
A)  radial velocity. 
B)  proper motion. 
C)  brightness. 
D)  mass. 
E)  spectral type.

Why is it difficult to decide how common hot stars are?

In an H-R diagram, stars with the smallest radius are found in the ____ of the diagram.

At what point in the light curve below is the cooler star in front of the hotter star?

The parallax of the star 75 Leo is 0.10 and its apparent visual magnitude is +5.18. The absolute visual magnitude of 75 Leo is ____________________.

The star named Circini has the spectral type and luminosity class of O 8.5 V. Based on this information, which of the following are true?

Groombridge 34 is an M1 V star. Based on this information, which of the following are true?

Describe the measurements needed to determine the orbit of a visual binary star.

Describe two methods that could be used to determine the temperature of a star.

Table 8-1 Use the chart below to answer the following question(s). -From the data given,, which star in Table 8-1 has the greatest diameter?

In the light curve below, what is the period of the eclipsing binary?

Diagram 8-1 Use the H-R diagram below to answer the following question(s). -Which star in Diagram 8-1 has the greatest surface temperature?

The diagram below shows the radial velocity curve of a double-line spectroscopic binary. Based on this radial velocity curve, which of the following statements is correct?

The best sample of the true numbers of the different types of stars consists of

____________________ 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.

Why don't we see hydrogen Balmer lines in the spectra of stars with temperatures of 3,200 K?

The luminosity of a star is the total amount of energy it radiates each second.

The most common stars are

We know the white dwarf star Sirius B has a mass comparable to the sun because

How does the luminosity depend on temperature for stars of the same size?

A spectroscopic binary shows periodic variations in its

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

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 8: The Family of Stars

Why is it difficult to decide how common hot stars are?

In an H-R diagram, stars with the smallest radius are found in the ____ of the diagram.

At what point in the light curve below is the cooler star in front of the hotter star?

The parallax of the star 75 Leo is 0.10 and its apparent visual magnitude is +5.18. The absolute visual magnitude of 75 Leo is ____________________.

The star named Circini has the spectral type and luminosity class of O 8.5 V. Based on this information, which of the following are true?

Groombridge 34 is an M1 V star. Based on this information, which of the following are true?

Describe the measurements needed to determine the orbit of a visual binary star.

Describe two methods that could be used to determine the temperature of a star.

Table 8-1 Use the chart below to answer the following question(s). -From the data given,, which star in Table 8-1 has the greatest diameter?

In the light curve below, what is the period of the eclipsing binary?

Diagram 8-1 Use the H-R diagram below to answer the following question(s). -Which star in Diagram 8-1 has the greatest surface temperature?

The diagram below shows the radial velocity curve of a double-line spectroscopic binary. Based on this radial velocity curve, which of the following statements is correct?

The best sample of the true numbers of the different types of stars consists of

____________________ 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.

Why don't we see hydrogen Balmer lines in the spectra of stars with temperatures of 3,200 K?

The luminosity of a star is the total amount of energy it radiates each second.

The most common stars are

We know the white dwarf star Sirius B has a mass comparable to the sun because

How does the luminosity depend on temperature for stars of the same size?

A spectroscopic binary shows periodic variations in its

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

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