Question 1

What information about orbital inclination can we get from visual binaries, spectroscopic binaries, and eclipsing binaries?

Accepted Answer

Astronomers can find the inclination of

Question 2

M dwarfs on the main sequence are brown dwarfs.

Accepted Answer

A) True 
 B)False

Question 3

In a/an ____________ binary, the orbits of both stars can be mapped.

Accepted Answer

The answer of In a/an ____________ binary, the orbits of...

Question 4

The diagram below illustrates two stars in a visual binary system and the center of mass of this system. Based on this diagram, what is the ratio of the mass of star A to the mass of star B?

Accepted Answer

A)  2 to 1 
B)  1 to 2 
C)  2 to 3 
D)  3 to 2 
E)  1 to 3 
A)  2 to 1 
B)  1 to 2 
C)  2 to 3 
D)  3 to 2 
E)  1 to 3

Question 5

Hydrogen Balmer lines are strongest near ____ spectral class whereas ionized Calcium (CaII) lines are strong in ___ stars.

Accepted Answer

A)  A0, K 
B)  O5, M5 
C)  M5, G1 
D)  M0, B0 
A)  A0, K 
B)  O5, M5 
C)  M5, G1 
D)  M0, B0

Question 6

The combined mass of a binary system is three solar masses. Star A is 1 AU and Star B is 2 AU from the center of mass. What are the masses of Star A and Star B, respectively?

Accepted Answer

A)  2.5, 0.5 
B)  1, 2 
C)  2, 1 
D)  0.5, 2.5 
A)  2.5, 0.5 
B)  1, 2 
C)  2, 1 
D)  0.5, 2.5

Question 7

How does an H-R diagram make it clear that giant stars are larger than main-sequence stars of the same temperature?

Accepted Answer

The relationship among luminosity, radiu

Question 8

Which stars always have large positive absolute magnitude?

Accepted Answer

A)  stars of high luminosity 
B)  stars of low luminosity 
C)  nearby stars 
D)  distant stars 
E)  not enough information given 
A)  stars of high luminosity 
B)  stars of low luminosity 
C)  nearby stars 
D)  distant stars 
E)  not enough information given

Question 9

For what kinds of stars are the masses of stars in the H-R diagram "orderly"? For what kinds of stars are they disorderly? In other words, could you guess the mass of a star from its location (luminosity, temperature) on the H-R diagram?

Accepted Answer

The masses of main-sequence st

Question 10

Spectroscopic and eclipse duration observations of an eclipsing binary star can enable astronomers to calculate________ of its individual stars.

Accepted Answer

A)  the masses 
B)  the sizes 
C)  the masses and sizes 
D)  neither masses nor sizes 
A)  the masses 
B)  the sizes 
C)  the masses and sizes 
D)  neither masses nor sizes

Question 11

-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)  α Pic 
D)  58 Ori 
E)  HR 2491 
A)  65 Tau 
B)  HR 4621 
C)  α Pic 
D)  58 Ori 
E)  HR 2491

Question 12

The most common kinds of stars are low-luminosity stars.

Accepted Answer

A) True 
 B)False

Question 13

If you compare two stars,

Accepted Answer

A)  the one with the larger radius will always have the greater luminosity. 
B)  the one with the higher surface temperature will always have the greater luminosity. 
C)  the one with the smaller absolute magnitude will always have the greater luminosity. 
D)  the one with the larger surface area has the greater energy flux from its surface. 
A)  the one with the larger radius will always have the greater luminosity. 
B)  the one with the higher surface temperature will always have the greater luminosity. 
C)  the one with the smaller absolute magnitude will always have the greater luminosity. 
D)  the one with the larger surface area has the greater energy flux from its surface.

Question 14

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 15

We can find the masses and diameters of stars that are in eclipsing binary systems.

Accepted Answer

A) True 
 B)False

Question 16

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

Accepted Answer

A)  65 Tau 
B)  HR 4621 
C)  α Pic 
D)  58 Ori 
E)  HR 2491 
A)  65 Tau 
B)  HR 4621 
C)  α Pic 
D)  58 Ori 
E)  HR 2491

Question 17

Stars on the main sequence with the greatest mass

Accepted Answer

A)  are spectral type M stars. 
B)  are spectral type O stars. 
C)  are located at the bottom of the main sequence in the H-R diagram. 
D)  have masses very similar to the Sun. 
E)  are spectral type O stars and are located at the bottom of the main sequence in the H-R diagram. 
A)  are spectral type M stars. 
B)  are spectral type O stars. 
C)  are located at the bottom of the main sequence in the H-R diagram. 
D)  have masses very similar to the Sun. 
E)  are spectral type O stars and are located at the bottom of the main sequence in the H-R diagram.

Question 18

Stars of spectra type K have strong Balmer lines.

Accepted Answer

A) True 
 B)False

Question 19

The correct sequence of spectral type letters from hot on the left to cool on the right is

Accepted Answer

A)  M, K, G, F, A, B, O 
B)  O, B, A, F, G, K, M 
C)  G, K, M, F, O, B, A 
D)  A, B, O, F, G, K, M 
A)  M, K, G, F, A, B, O 
B)  O, B, A, F, G, K, M 
C)  G, K, M, F, O, B, A 
D)  A, B, O, F, G, K, M

Question 20

In a binary system, the more massive star

Accepted Answer

A)  is at the center of mass. 
B)  is farthest from the center of mass. 
C)  is nearest the center of mass. 
D)  follows the largest orbit. 
E)  shows a larger Doppler shift in its spectral lines. 
A)  is at the center of mass. 
B)  is farthest from the center of mass. 
C)  is nearest the center of mass. 
D)  follows the largest orbit. 
E)  shows a larger Doppler shift in its spectral lines.

What information about orbital inclination can we get from visual binaries, spectroscopic binaries, and eclipsing binaries?

M dwarfs on the main sequence are brown dwarfs.

In a/an ____________ binary, the orbits of both stars can be mapped.

The diagram below illustrates two stars in a visual binary system and the center of mass of this system. Based on this diagram, what is the ratio of the mass of star A to the mass of star B?

Hydrogen Balmer lines are strongest near __ spectral class whereas ionized Calcium (CaII) lines are strong in _ stars.

The combined mass of a binary system is three solar masses. Star A is 1 AU and Star B is 2 AU from the center of mass. What are the masses of Star A and Star B, respectively?

How does an H-R diagram make it clear that giant stars are larger than main-sequence stars of the same temperature?

Which stars always have large positive absolute magnitude?

For what kinds of stars are the masses of stars in the H-R diagram "orderly"? For what kinds of stars are they disorderly? In other words, could you guess the mass of a star from its location (luminosity, temperature) on the H-R diagram?

Spectroscopic and eclipse duration observations of an eclipsing binary star can enable astronomers to calculate________ of its individual stars.

-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?

The most common kinds of stars are low-luminosity stars.

If you compare two stars,

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

We can find the masses and diameters of stars that are in eclipsing binary systems.

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

Stars on the main sequence with the greatest mass

Stars of spectra type K have strong Balmer lines.

The correct sequence of spectral type letters from hot on the left to cool on the right is

In a binary system, the more massive star

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

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Exam 8: The Family of Stars

What information about orbital inclination can we get from visual binaries, spectroscopic binaries, and eclipsing binaries?

M dwarfs on the main sequence are brown dwarfs.

In a/an ____________ binary, the orbits of both stars can be mapped.

The diagram below illustrates two stars in a visual binary system and the center of mass of this system. Based on this diagram, what is the ratio of the mass of star A to the mass of star B?

Hydrogen Balmer lines are strongest near ____ spectral class whereas ionized Calcium (CaII) lines are strong in ___ stars.

The combined mass of a binary system is three solar masses. Star A is 1 AU and Star B is 2 AU from the center of mass. What are the masses of Star A and Star B, respectively?

How does an H-R diagram make it clear that giant stars are larger than main-sequence stars of the same temperature?

Which stars always have large positive absolute magnitude?

For what kinds of stars are the masses of stars in the H-R diagram "orderly"? For what kinds of stars are they disorderly? In other words, could you guess the mass of a star from its location (luminosity, temperature) on the H-R diagram?

Spectroscopic and eclipse duration observations of an eclipsing binary star can enable astronomers to calculate________ of its individual stars.

-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?

The most common kinds of stars are low-luminosity stars.

If you compare two stars,

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

We can find the masses and diameters of stars that are in eclipsing binary systems.

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

Stars on the main sequence with the greatest mass

Stars of spectra type K have strong Balmer lines.

The correct sequence of spectral type letters from hot on the left to cool on the right is

In a binary system, the more massive star

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

Hydrogen Balmer lines are strongest near __ spectral class whereas ionized Calcium (CaII) lines are strong in _ stars.