Question 1

Why would parallaxes be easier to observe if Earth were farther from the Sun

Accepted Answer

Then the baseline of

Question 2

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 3

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 4

We can determine the surface temperature of a star from

Accepted Answer

A) studying its continuous spectrum. 
B) studying its line absorption spectrum. 
C) measuring the star's luminosity. 
D) studying its continuous spectrum and measuring the star's luminosity. 
E) studying its continuous spectrum, studying its line absorption spectrum, and measuring the star's luminosity. 
A) studying its continuous spectrum. 
B) studying its line absorption spectrum. 
C) measuring the star's luminosity. 
D) studying its continuous spectrum and measuring the star's luminosity. 
E) studying its continuous spectrum, studying its line absorption spectrum, and measuring the star's luminosity.

Question 5

The larger variation in brightness of a partially eclipsing system consisting of a B2 main-sequence star and an M2 main-sequence star occurs when the B2 star passes in front of the M2 star.

Accepted Answer

A) True 
 B)False

Question 6

Supergiants are about as common as the Sun.

Accepted Answer

A) True 
 B)False

Question 7

The star Algol is

Accepted Answer

A) an astrometric binary. 
B) a spectroscopic binary. 
C) a visual binary. 
D) an eclipsing binary. 
E) a spectroscopic binary and an eclipsing binary. 
A) an astrometric binary. 
B) a spectroscopic binary. 
C) a visual binary. 
D) an eclipsing binary. 
E) a spectroscopic binary and an eclipsing binary.

Question 8

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 9

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

Accepted Answer

A) True 
 B)False

Question 10

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

Accepted Answer

A) True 
 B)False

Question 11

Groombridge 34 is an M1 V star. Based on this information, which of the following are true I.Groombridge 34 has a surface temperature that is less than the Sun.
II.Groombridge 34 has a mass that is greater than that of the Sun.
III.Groombridge 34 is less luminous than the Sun.
IV.Groombridge 34 is located near the middle of the H-R diagram.

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 12

Table 8-1
 
-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 13

The more massive star in a binary system is always farthest from the center of mass.

Accepted Answer

A) True 
 B)False

Question 14

On the H-R diagram, lines of constant radius slants down from left to right.

Accepted Answer

A) True 
 B)False

Question 15

Table 8-1
 
-From the data given, which star in Table 8-1 has the greatest luminosity

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 16

The most massive main-sequence stars are the M stars.

Accepted Answer

A) True 
 B)False

Question 17

If a star's apparent visual magnitude is equal to its absolute visual magnitude, how far is the star located from Earth

Accepted Answer

A) 0 pc 
B) 1 pc 
C) 10 pc 
D) 100 pc 
A) 0 pc 
B) 1 pc 
C) 10 pc 
D) 100 pc

Question 18

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

Accepted Answer

A) True 
 B)False

Question 19

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 20

How do humans use their eyes to measure relative distance by parallax

Accepted Answer

A) By continuously focusing our eyes on distant objects, we can determine distance. 
B) Since our eyes are separated, the brain interprets the relative look angles of these eyes in terms of distance to the object viewed. 
C) Our eyes can measure the time it takes light to travel from an object and from this we get distance. 
D) By moving our heads from side to side our brain compares look angles from each of these positions to obtain the distance to the object viewed. 
A) By continuously focusing our eyes on distant objects, we can determine distance. 
B) Since our eyes are separated, the brain interprets the relative look angles of these eyes in terms of distance to the object viewed. 
C) Our eyes can measure the time it takes light to travel from an object and from this we get distance. 
D) By moving our heads from side to side our brain compares look angles from each of these positions to obtain the distance to the object viewed.

Why would parallaxes be easier to observe if Earth were farther from the Sun

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

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

We can determine the surface temperature of a star from

The larger variation in brightness of a partially eclipsing system consisting of a B2 main-sequence star and an M2 main-sequence star occurs when the B2 star passes in front of the M2 star.

Supergiants are about as common as the Sun.

The star Algol is

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

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

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

Table 8-1 -From the data given, which star in Table 8-1 has the greatest diameter

The more massive star in a binary system is always farthest from the center of mass.

On the H-R diagram, lines of constant radius slants down from left to right.

Table 8-1 -From the data given, which star in Table 8-1 has the greatest luminosity

The most massive main-sequence stars are the M stars.

If a star's apparent visual magnitude is equal to its absolute visual magnitude, how far is the star located from Earth

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

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

How do humans use their eyes to measure relative distance by parallax

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 would parallaxes be easier to observe if Earth were farther from the Sun

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

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

We can determine the surface temperature of a star from

The larger variation in brightness of a partially eclipsing system consisting of a B2 main-sequence star and an M2 main-sequence star occurs when the B2 star passes in front of the M2 star.

Supergiants are about as common as the Sun.

The star Algol is

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

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

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

Table 8-1 -From the data given, which star in Table 8-1 has the greatest diameter

The more massive star in a binary system is always farthest from the center of mass.

On the H-R diagram, lines of constant radius slants down from left to right.

Table 8-1 -From the data given, which star in Table 8-1 has the greatest luminosity

The most massive main-sequence stars are the M stars.

If a star's apparent visual magnitude is equal to its absolute visual magnitude, how far is the star located from Earth

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

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

How do humans use their eyes to measure relative distance by parallax

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