Question 1

What information can we get from eclipsing binaries that we cannot get from visual binaries?

Accepted Answer

The answer of What information can we get from eclipsing...

Question 2

Which of the following can we NOT use to determine the surface temperature of a star?

Accepted Answer

A) studying its continuous spectrum 
B) studying its line absorption spectrum 
C) measuring the star's luminosity and diameter 
D) measuring the star's parallax 
A) studying its continuous spectrum 
B) studying its line absorption spectrum 
C) measuring the star's luminosity and diameter 
D) measuring the star's parallax

Question 3

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 4

In an H-R diagram,where are 90 percent of all the stars found?

Accepted Answer

A) in the giant region 
B) in the supergiant region 
C) on the dwarf sequence 
D) on the main sequence 
A) in the giant region 
B) in the supergiant region 
C) on the dwarf sequence 
D) on the main sequence

Question 5

The location of a star in the H-R diagram indicates its temperature and intrinsic brightness.

Accepted Answer

A) True 
 B)False

Question 6

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

Accepted Answer

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

Question 7

Which star type in the Milky Way is likely to be most completely catalogued?

Accepted Answer

A) Red main-sequence stars, because there are so many of them. 
B) Luminous stars, because they are bright and easy to find. 
C) Stars like the Sun, because the Sun is a typical star. 
D) White dwarf stars, because they are so old. 
A) Red main-sequence stars, because there are so many of them. 
B) Luminous stars, because they are bright and easy to find. 
C) Stars like the Sun, because the Sun is a typical star. 
D) White dwarf stars, because they are so old.

Question 8

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

Accepted Answer

Determining the prevalence of hot stars

Question 9

The table lists the spectral types for each of four stars.Which star in this table would have the highest surface temperature?

Accepted Answer

A) α For 
B) o Cet 
C) ƴ Tri 
D)  $ \xi $ Per 
A) α For 
B) o Cet 
C) ƴ Tri 
D)  $ \xi $ Per

Question 10

-Look carefully at this diagram of a radial velocity curve for a spectroscopic binary.Which of the stars is most massive? ____________________

Accepted Answer

The answer of  
-Look carefully at this diagram of...

Question 11

Which of the following kinds of stars best obey the mass-luminosity relation?

Accepted Answer

A) main-sequence stars 
B) giant stars 
C) supergiant stars 
D) white dwarfs 
A) main-sequence stars 
B) giant stars 
C) supergiant stars 
D) white dwarfs

Question 12

Which stars on the main sequence have the greatest mass?

Accepted Answer

A) the spectral type M stars 
B) the spectral type O stars 
C) those that are located in the lower right of the H-R diagram 
D) those that are located in the lower left of the H-R diagram 
A) the spectral type M stars 
B) the spectral type O stars 
C) those that are located in the lower right of the H-R diagram 
D) those that are located in the lower left of the H-R diagram

Question 13

-Use the H-R diagram to answer the following question: Which star in the diagram is most like the Sun?

Accepted Answer

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

Question 14

Why are spectroscopic binaries difficult to analyze?

Accepted Answer

A) We can't see the shape or tilt of the orbit. 
B) We can't find the diameters of the stars. 
C) We can't determine the luminosities of the stars. 
D) The Doppler shift is not measurable. 
A) We can't see the shape or tilt of the orbit. 
B) We can't find the diameters of the stars. 
C) We can't determine the luminosities of the stars. 
D) The Doppler shift is not measurable.

Question 15

What is the most common kind of star? What measurements must be made to discover this information?

Accepted Answer

The most common kind of star in the univ

Question 16

-On the H-R diagram,indicate the location of the white dwarf stars.

Accepted Answer

An elongated region should be

Question 17

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 18

For stars on the main sequence,the luminosity can be estimated by the formula L = ____________________.

Accepted Answer

The answer of For stars on the main sequence,the luminosity...

Question 19

An M star is hotter than an O star.

Accepted Answer

A) True 
 B)False

Question 20

What is the most accurate way to determine the surface temperature of a star?

Accepted Answer

A) Study the pattern of absorption lines from various atoms. 
B) Study the relative intensities of light measured through different photometric filters. 
C) Study the peak wavelength of the star's continuum blackbody spectrum. 
D) Study the pattern of emission lines on the star's spectrum. 
A) Study the pattern of absorption lines from various atoms. 
B) Study the relative intensities of light measured through different photometric filters. 
C) Study the peak wavelength of the star's continuum blackbody spectrum. 
D) Study the pattern of emission lines on the star's spectrum.

What information can we get from eclipsing binaries that we cannot get from visual binaries?

Which of the following can we NOT use to determine the surface temperature of a 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 ____________________.

In an H-R diagram,where are 90 percent of all the stars found?

The location of a star in the H-R diagram indicates its temperature and intrinsic brightness.

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

Which star type in the Milky Way is likely to be most completely catalogued?

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

The table lists the spectral types for each of four stars.Which star in this table would have the highest surface temperature?

-Look carefully at this diagram of a radial velocity curve for a spectroscopic binary.Which of the stars is most massive? ____________________

Which of the following kinds of stars best obey the mass-luminosity relation?

Which stars on the main sequence have the greatest mass?

-Use the H-R diagram to answer the following question: Which star in the diagram is most like the Sun?

Why are spectroscopic binaries difficult to analyze?

What is the most common kind of star? What measurements must be made to discover this information?

-On the H-R diagram,indicate the location of the white dwarf stars.

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

For stars on the main sequence,the luminosity can be estimated by the formula L = ____________________.

An M star is hotter than an O star.

What is the most accurate way to determine the surface temperature of a star?

The Scale of the Cosmos

User's Guide to the Sky

The Origin of Modern Astronomy

Astronomical Telescopes and Instruments

Sun Light and Sun Atoms

The Structure and Formation of Stars

The Deaths of Stars

The Milky Way Galaxy

Galaxies

Cosmology in the 21st Century

The Origin of the Solar System

Comparative Planetology of the Terrestrial Planets

Comparative Planetology of the Jovian Planets

Life on Other Worlds

Filters

Exam 6: The Family of Stars

What information can we get from eclipsing binaries that we cannot get from visual binaries?

Which of the following can we NOT use to determine the surface temperature of a 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 ____________________.

In an H-R diagram,where are 90 percent of all the stars found?

The location of a star in the H-R diagram indicates its temperature and intrinsic brightness.

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

Which star type in the Milky Way is likely to be most completely catalogued?

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

The table lists the spectral types for each of four stars.Which star in this table would have the highest surface temperature?

-Look carefully at this diagram of a radial velocity curve for a spectroscopic binary.Which of the stars is most massive? ____________________

Which of the following kinds of stars best obey the mass-luminosity relation?

Which stars on the main sequence have the greatest mass?

-Use the H-R diagram to answer the following question: Which star in the diagram is most like the Sun?

Why are spectroscopic binaries difficult to analyze?

What is the most common kind of star? What measurements must be made to discover this information?

-On the H-R diagram,indicate the location of the white dwarf stars.

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

For stars on the main sequence,the luminosity can be estimated by the formula L = ____________________.

An M star is hotter than an O star.

What is the most accurate way to determine the surface temperature of a star?

The Scale of the Cosmos

User's Guide to the Sky

The Origin of Modern Astronomy

Astronomical Telescopes and Instruments

Sun Light and Sun Atoms

The Structure and Formation of Stars

The Deaths of Stars

The Milky Way Galaxy

Galaxies

Cosmology in the 21st Century

The Origin of the Solar System

Comparative Planetology of the Terrestrial Planets

Comparative Planetology of the Jovian Planets

Life on Other Worlds

Filters