Question 1

A star's motion across the sky is its ________ motion.

Accepted Answer

The answer of A star's motion across the sky is...

Question 2

How is proper motion measured?

Accepted Answer

It is the apparent motion of t

Question 3

In a spectroscopic binary, if a pair shows a combined set of lines tonight, but a maximum split two nights later, its orbital period must be

Accepted Answer

A)  one day. 
B)  two days. 
C)  four days. 
D)  eight days. 
E)  twelve days. 
A)  one day. 
B)  two days. 
C)  four days. 
D)  eight days. 
E)  twelve days.

Question 4

From hottest to coolest, the seven letters for the star types are ________.

Accepted Answer

The answer of From hottest to coolest, the seven letters...

Question 5

The proper motion of a star is its true velocity through space.

Accepted Answer

A) True 
 B)False

Question 6

In what range of masses are most stars found?

Accepted Answer

A)  0.1 to 2 solar masses 
B)  1 to 3 solar masses 
C)  0.1 to 100 solar masses 
D)  0.01 to 100 solar masses 
E)  Stars can have any mass. 
A)  0.1 to 2 solar masses 
B)  1 to 3 solar masses 
C)  0.1 to 100 solar masses 
D)  0.01 to 100 solar masses 
E)  Stars can have any mass.

Question 7

What is the absolute magnitude of our Sun?

Accepted Answer

A)  -23.0 
B)  -4.6 
C)  -1.4 
D)  +4.8 
E)  +9.4 
A)  -23.0 
B)  -4.6 
C)  -1.4 
D)  +4.8 
E)  +9.4

Question 8

In general, the narrower the spectral line of a star

Accepted Answer

A)  the hotter the star is. 
B)  the bigger the star is. 
C)  the denser the star is. 
D)  the smaller the star is. 
E)  the cooler the star is. 
A)  the hotter the star is. 
B)  the bigger the star is. 
C)  the denser the star is. 
D)  the smaller the star is. 
E)  the cooler the star is.

Question 9

Explain how the shifting spectral lines of spectroscopic binaries let us find their periods.

Accepted Answer

When aligned in our line of sight, there

Question 10

If two stars are the same size and one is twice the temperature of the other, how much more luminous is the hotter one?

Accepted Answer

The answer of If two stars are the same size...

Question 11

What types of observations are necessary to determine the motion of a star through space?

Accepted Answer

To determine the True space motion of a

Question 12

In a spectroscopic binary system, the star showing the larger blue shift is

Accepted Answer

A)  cooler and receding the fastest. 
B)  less massive of the pair and receding slower. 
C)  more massive and approaching us. 
D)  less massive and approaching us at this moment. 
E)  hotter and receding faster. 
A)  cooler and receding the fastest. 
B)  less massive of the pair and receding slower. 
C)  more massive and approaching us. 
D)  less massive and approaching us at this moment. 
E)  hotter and receding faster.

Question 13

Having nothing to do with trigonometry, ________ parallaxes use the width of absorption lines to estimate the star's luminosity and size and distance.

Accepted Answer

A)  bolometric 
B)  photometric 
C)  spectroscopic 
D)  holographic 
E)  videometric 
A)  bolometric 
B)  photometric 
C)  spectroscopic 
D)  holographic 
E)  videometric

Question 14

Star A is a main sequence star of spectral type F2 and star B is a white dwarf of spectral type B4. Which statement below is correct?

Accepted Answer

A)  Star A appears brighter than star B. 
B)  Star B appears brighter than star A. 
C)  Star A is hotter than star B. 
D)  Star B is hotter than star A. 
E)  None of the above can be said about these two stars. 
A)  Star A appears brighter than star B. 
B)  Star B appears brighter than star A. 
C)  Star A is hotter than star B. 
D)  Star B is hotter than star A. 
E)  None of the above can be said about these two stars.

Question 15

Capella is the same temperature as our Sun, but about ten times the Sun's diameter; it must be about ________ times as luminous as our star.

Accepted Answer

The answer of Capella is the same temperature as our...

Question 16

Star A has an absolute magnitude of 2.5 and star B has an apparent magnitude of 2.5, but star A is a main sequence star and star B is a red giant. Which statement below is correct?

Accepted Answer

A)  Star A appears brighter than star B, but star B and star A have the same intrinsic brightness. 
B)  Star B appears brighter than star A, but star B and star A have the same intrinsic brightness. 
C)  Star A and star B appear to have the same brightness, but star B is intrinsically brighter than star A. 
D)  Star A and star B appear to have the same brightness, but star A is intrinsically brighter than star B. 
E)  It is impossible to determine how bright these stars are or appear to be relative to one another, given the information above. 
A)  Star A appears brighter than star B, but star B and star A have the same intrinsic brightness. 
B)  Star B appears brighter than star A, but star B and star A have the same intrinsic brightness. 
C)  Star A and star B appear to have the same brightness, but star B is intrinsically brighter than star A. 
D)  Star A and star B appear to have the same brightness, but star A is intrinsically brighter than star B. 
E)  It is impossible to determine how bright these stars are or appear to be relative to one another, given the information above.

Question 17

A star with a parallax of 1 second of arc is at a distance of ________ by definition.

Accepted Answer

The answer of A star with a parallax of 1...

Question 18

On the H-R diagram, white dwarfs lie Sirius B and Procyon B lie

Accepted Answer

A)  at the top left. 
B)  at the top right. 
C)  close to the Sun, near the center. 
D)  at the lower left. 
E)  at the lower right. 
A)  at the top left. 
B)  at the top right. 
C)  close to the Sun, near the center. 
D)  at the lower left. 
E)  at the lower right.

Question 19

What is proper motion? How is it related to transverse velocity?

Accepted Answer

Annual apparent motion of a st

Question 20

In comparing first magnitude Deneb with second magnitude Polaris, we find that

Accepted Answer

A)  Polaris is in reality much more luminous. 
B)  Deneb must be much hotter than Polaris. 
C)  Deneb appears 2.5 times brighter to us than does Polaris. 
D)  Polaris is really 100 times brighter than nearby Deneb. 
E)  Deneb is really much closer than Polaris. 
A)  Polaris is in reality much more luminous. 
B)  Deneb must be much hotter than Polaris. 
C)  Deneb appears 2.5 times brighter to us than does Polaris. 
D)  Polaris is really 100 times brighter than nearby Deneb. 
E)  Deneb is really much closer than Polaris.

A star's motion across the sky is its ________ motion.

How is proper motion measured?

In a spectroscopic binary, if a pair shows a combined set of lines tonight, but a maximum split two nights later, its orbital period must be

From hottest to coolest, the seven letters for the star types are ________.

The proper motion of a star is its true velocity through space.

In what range of masses are most stars found?

What is the absolute magnitude of our Sun?

In general, the narrower the spectral line of a star

Explain how the shifting spectral lines of spectroscopic binaries let us find their periods.

If two stars are the same size and one is twice the temperature of the other, how much more luminous is the hotter one?

What types of observations are necessary to determine the motion of a star through space?

In a spectroscopic binary system, the star showing the larger blue shift is

Having nothing to do with trigonometry, ________ parallaxes use the width of absorption lines to estimate the star's luminosity and size and distance.

Star A is a main sequence star of spectral type F2 and star B is a white dwarf of spectral type B4. Which statement below is correct?

Capella is the same temperature as our Sun, but about ten times the Sun's diameter; it must be about ________ times as luminous as our star.

Star A has an absolute magnitude of 2.5 and star B has an apparent magnitude of 2.5, but star A is a main sequence star and star B is a red giant. Which statement below is correct?

A star with a parallax of 1 second of arc is at a distance of ________ by definition.

On the H-R diagram, white dwarfs lie Sirius B and Procyon B lie

What is proper motion? How is it related to transverse velocity?

In comparing first magnitude Deneb with second magnitude Polaris, we find that

The Night Sky

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The Solar System

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Exam 9: Measuring the Stars

A star's motion across the sky is its ________ motion.

How is proper motion measured?

In a spectroscopic binary, if a pair shows a combined set of lines tonight, but a maximum split two nights later, its orbital period must be

From hottest to coolest, the seven letters for the star types are ________.

The proper motion of a star is its true velocity through space.

In what range of masses are most stars found?

What is the absolute magnitude of our Sun?

In general, the narrower the spectral line of a star

Explain how the shifting spectral lines of spectroscopic binaries let us find their periods.

If two stars are the same size and one is twice the temperature of the other, how much more luminous is the hotter one?

What types of observations are necessary to determine the motion of a star through space?

In a spectroscopic binary system, the star showing the larger blue shift is

Having nothing to do with trigonometry, ________ parallaxes use the width of absorption lines to estimate the star's luminosity and size and distance.

Star A is a main sequence star of spectral type F2 and star B is a white dwarf of spectral type B4. Which statement below is correct?

Capella is the same temperature as our Sun, but about ten times the Sun's diameter; it must be about ________ times as luminous as our star.

Star A has an absolute magnitude of 2.5 and star B has an apparent magnitude of 2.5, but star A is a main sequence star and star B is a red giant. Which statement below is correct?

A star with a parallax of 1 second of arc is at a distance of ________ by definition.

On the H-R diagram, white dwarfs lie Sirius B and Procyon B lie

What is proper motion? How is it related to transverse velocity?

In comparing first magnitude Deneb with second magnitude Polaris, we find that

The Night Sky

Light and Telescopes

The Solar System

Earth and Its Moon

The Eight Planets

Small Bodies in the Solar System

Formation of Planetary Systems

The Sun

Star Formation and Evolution

Stellar Explosions

Black Holes

The Milky Way Galaxy

Galaxies

Cosmology and the Universe

Filters