Question 1

The amount of light received at Earth from a star is called luminosity.

Accepted Answer

A) True 
 B)False

Question 2

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 3

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 4

Betelgeuse has an MV = -5 and 1000 times the radius of the Sun. Barnard's Star has an MV = 13.2 and 100 times smaller than the Sun. Therefore, we can determine that the stars have the same temperature.

Accepted Answer

A) True 
 B)False

Question 5

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 
E) All of the other choices are correct. 
A) main-sequence stars 
B) giant stars 
C) supergiant stars 
D) white dwarfs 
E) All of the other choices are correct.

Question 6

If we divide the mass of a star by its volume we calculate the star's ____________________.

Accepted Answer

The answer of If we divide the mass of a...

Question 7

According to the text, humans have a _____ size compared to stellar and microscopic objects.

Accepted Answer

A) extra small 
B) small 
C) medium 
D) large 
A) extra small 
B) small 
C) medium 
D) large

Question 8

To determine the orbital period of a visual binary, we must measure

Accepted Answer

A) brightness. 
B) position on the sky. 
C) wavelengths. 
D) luminosity. 
E) temperature. 
A) brightness. 
B) position on the sky. 
C) wavelengths. 
D) luminosity. 
E) temperature.

Question 9

Luminosity class IV objects are known as ____________________.

Accepted Answer

The answer of Luminosity class IV objects are known as...

Question 10

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 11

How is a luminosity class assigned to a star

Accepted Answer

A) by combining the apparent magnitude with the star's parallax 
B) by measuring the period of variability in the star's apparent magnitude 
C) by studying the absorption line width in the spectrum of the star 
D) by observing the angular size of the star's image in a photograph or digital image 
A) by combining the apparent magnitude with the star's parallax 
B) by measuring the period of variability in the star's apparent magnitude 
C) by studying the absorption line width in the spectrum of the star 
D) by observing the angular size of the star's image in a photograph or digital image

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

If a star has a parallax of 0.02 seconds of arc, then its distance is

Accepted Answer

A) 20 pc. 
B) 50 pc. 
C) 2 pc. 
D) 5 pc. 
E) 500 pc. 
A) 20 pc. 
B) 50 pc. 
C) 2 pc. 
D) 5 pc. 
E) 500 pc.

Question 14

Table 8-1
 
-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 15

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

Accepted Answer

Measure the positions of the t

Question 16

Table 8-2
 
-Which star in Table 8-2 has the greatest diameter

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 17

If a binary system has a period of 4 years and a separation of 5 AU, then the total mass is 7.8 solar masses.

Accepted Answer

A) True 
 B)False

Question 18

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 19

The absorption lines in the visible portion of the spectrum of a star that are produced by hydrogen are from the

Accepted Answer

A) Lyman series. 
B) Balmer series. 
C) Paschen series. 
D) isotopes of hydrogen. 
E) ions of hydrogen. 
A) Lyman series. 
B) Balmer series. 
C) Paschen series. 
D) isotopes of hydrogen. 
E) ions of hydrogen.

Question 20

How can we be certain that white dwarfs are very small

Accepted Answer

White dwarfs lie in the lower

The amount of light received at Earth from a star is called luminosity.

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

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

Betelgeuse has an MV = -5 and 1000 times the radius of the Sun. Barnard's Star has an MV = 13.2 and 100 times smaller than the Sun. Therefore, we can determine that the stars have the same temperature.

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

If we divide the mass of a star by its volume we calculate the star's ____________________.

According to the text, humans have a _____ size compared to stellar and microscopic objects.

To determine the orbital period of a visual binary, we must measure

Luminosity class IV objects are known as ____________________.

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

How is a luminosity class assigned to a star

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

If a star has a parallax of 0.02 seconds of arc, then its distance is

Table 8-1 -From the data given, which star in Table 8-1 is the closest to Earth

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

Table 8-2 -Which star in Table 8-2 has the greatest diameter

If a binary system has a period of 4 years and a separation of 5 AU, then the total mass is 7.8 solar masses.

The absorption lines in the visible portion of the spectrum of a star that are produced by hydrogen are from the

How can we be certain that white dwarfs are very small

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

Exam 8: The Family of Stars

The amount of light received at Earth from a star is called luminosity.

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

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

Betelgeuse has an MV = -5 and 1000 times the radius of the Sun. Barnard's Star has an MV = 13.2 and 100 times smaller than the Sun. Therefore, we can determine that the stars have the same temperature.

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

If we divide the mass of a star by its volume we calculate the star's ____________________.

According to the text, humans have a _____ size compared to stellar and microscopic objects.

To determine the orbital period of a visual binary, we must measure

Luminosity class IV objects are known as ____________________.

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

How is a luminosity class assigned to a star

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

If a star has a parallax of 0.02 seconds of arc, then its distance is

Table 8-1 -From the data given, which star in Table 8-1 is the closest to Earth

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

Table 8-2 -Which star in Table 8-2 has the greatest diameter

If a binary system has a period of 4 years and a separation of 5 AU, then the total mass is 7.8 solar masses.

The absorption lines in the visible portion of the spectrum of a star that are produced by hydrogen are from the

How can we be certain that white dwarfs are very small

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