Question 1

How does a star's luminosity relate to its radius and surface temperature?

Accepted Answer

As either radius or surface te

Question 2

Contrast finding the distances to seventh magnitude M3V and M3Ib stars.

Accepted Answer

An M3V main sequence star that bright wo

Question 3

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

Accepted Answer

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

Question 4

Studies of a star's position made on the same calendar date over subsequent years yield
.

Accepted Answer

The answer of Studies of a star's position made on...

Question 5

On the H- R diagram, the Sun lies

Accepted Answer

A)  at the bottom left. 
B)  at the top left. 
C)  about the middle of the main sequence. 
D)  at the top right. 
E)  at the bottom right. 
A)  at the bottom left. 
B)  at the top left. 
C)  about the middle of the main sequence. 
D)  at the top right. 
E)  at the bottom right.

Question 6

The mass of a newly formed star will determine its position on the main sequence.

Accepted Answer

A) True 
 B)False

Question 7

Why are eclipsing binaries the rarest of the three types discussed?

Accepted Answer

Only if we are lucky will we s

Question 8

Why do the spectra of stars differ, if they are all chiefly hydrogen and helium?

Accepted Answer

Temperature differences causes some elem

Question 9

A star system where we observe the magnitude to increase and decrease is a(n) .

Accepted Answer

The answer of A star system where we observe the...

Question 10

Contrast main sequence stars of type B and G.

Accepted Answer

The B star will be h

Question 11

Compared to the size of the Sun, stars of all types range from

Accepted Answer

A)  0.5 to 50 solar radii. 
B)  0.01 to 1,000 solar radii. 
C)  0.001 to 50,000 solar radii. 
D)  0.08 to 8,000 solar radii. 
E)  0.1 to 10 solar radii. 
A)  0.5 to 50 solar radii. 
B)  0.01 to 1,000 solar radii. 
C)  0.001 to 50,000 solar radii. 
D)  0.08 to 8,000 solar radii. 
E)  0.1 to 10 solar radii.

Question 12

If a G2 star is 100 times as luminous as our Sun, it must be times the Sun's diameter.

Accepted Answer

The answer of If a G2 star is 100 times...

Question 13

How much brighter will a 4th magnitude star appear than a 6th magnitude star?

Accepted Answer

A)  2.0 times 
B)  6.25 times 
C)  16 times 
D)  2.5 times 
E)  8 times 
A)  2.0 times 
B)  6.25 times 
C)  16 times 
D)  2.5 times 
E)  8 times

Question 14

At its brightest, Venus, at magnitude - 4, is 100 times brighter than a 1st magnitude star.

Accepted Answer

A) True 
 B)False

Question 15

If we know the average separation and period of revolution for a binary system, we can then measure

Accepted Answer

A)  their absolute magnitudes. 
B)  the actual sizes of the two stars. 
C)  the actual luminosity of each star. 
D)  the actual mass of both individual stars. 
E)  the total mass of the system. 
A)  their absolute magnitudes. 
B)  the actual sizes of the two stars. 
C)  the actual luminosity of each star. 
D)  the actual mass of both individual stars. 
E)  the total mass of the system.

Question 16

The H- R diagram can plot

Accepted Answer

A)  apparent magnitude versus spectral classes. 
B)  temperature versus mass. 
C)  temperature versus luminosity. 
D)  radius versus luminosity. 
E)  radius versus mass. 
A)  apparent magnitude versus spectral classes. 
B)  temperature versus mass. 
C)  temperature versus luminosity. 
D)  radius versus luminosity. 
E)  radius versus mass.

Question 17

If a binary is detected by periodic shifts in its spectral lines, it is a(n) _ _ binary.

Accepted Answer

The answer of If a binary is detected by periodic...

Question 18

The full Moon's apparent magnitude is

Accepted Answer

A)  - 26.2. 
B)  - 12.5. 
C)  +12.7. 
D)  +4.83. 
E)  - 1.4. 
A)  - 26.2. 
B)  - 12.5. 
C)  +12.7. 
D)  +4.83. 
E)  - 1.4.

Question 19

Why is it difficult to directly measure the size of a star's disk from Earth?

Accepted Answer

Our turbulent atmosp

Question 20

Deneb's estimated distance of 1400 light- years comes from spectroscopic parallax measurements.

Accepted Answer

A) True 
 B)False

How does a star's luminosity relate to its radius and surface temperature?

Contrast finding the distances to seventh magnitude M3V and M3Ib stars.

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

Studies of a star's position made on the same calendar date over subsequent years yield .

On the H- R diagram, the Sun lies

The mass of a newly formed star will determine its position on the main sequence.

Why are eclipsing binaries the rarest of the three types discussed?

Why do the spectra of stars differ, if they are all chiefly hydrogen and helium?

A star system where we observe the magnitude to increase and decrease is a(n) .

Contrast main sequence stars of type B and G.

Compared to the size of the Sun, stars of all types range from

If a G2 star is 100 times as luminous as our Sun, it must be times the Sun's diameter.

How much brighter will a 4th magnitude star appear than a 6th magnitude star?

At its brightest, Venus, at magnitude - 4, is 100 times brighter than a 1st magnitude star.

If we know the average separation and period of revolution for a binary system, we can then measure

The H- R diagram can plot

If a binary is detected by periodic shifts in its spectral lines, it is a(n) _ _ binary.

The full Moon's apparent magnitude is

Why is it difficult to directly measure the size of a star's disk from Earth?

Deneb's estimated distance of 1400 light- years comes from spectroscopic parallax measurements.

Charting the Heavens: the Foundations of Astronomy

The Copernican Revolution: the Birth of Modern Science

Light and Matter: the Inner Workings of the Cosmos

Telescopes: the Tools of Astronomy

The Solar System: Interplanetary Matter and the Birth of the Planets

Earth and Its Moon: Our Cosmic Backyard

The Terrestrial Planets: a Study in Contrasts

The Jovian Planets: Giants of the Solar System

Moons, Rings, and Plutoids: Small Worlds Among Giants

The Sun: Our Parent Star

The Interstellar Medium: Star Formation in the Milky Way

Stellar Evolution: the Lives and Deaths of Stars

Neutron Stars and Black Holes: Strange States of Matter

The Milky Way Galaxy: a Spiral in Space

Normal and Active Galaxies: Building Blocks of the Universe

Hubbles Law and Dark Matter: the Large-Scale Structure of the Cosmos

Cosmology: the Big Bang and the Fate of the Universe

Life in the Universe: Are We Alone

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Exam 11: Measuring the Stars: Giants, Dwarfs, and the Main Sequence

How does a star's luminosity relate to its radius and surface temperature?

Contrast finding the distances to seventh magnitude M3V and M3Ib stars.

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

Studies of a star's position made on the same calendar date over subsequent years yield .

On the H- R diagram, the Sun lies

The mass of a newly formed star will determine its position on the main sequence.

Why are eclipsing binaries the rarest of the three types discussed?

Why do the spectra of stars differ, if they are all chiefly hydrogen and helium?

A star system where we observe the magnitude to increase and decrease is a(n) .

Contrast main sequence stars of type B and G.

Compared to the size of the Sun, stars of all types range from

If a G2 star is 100 times as luminous as our Sun, it must be times the Sun's diameter.

How much brighter will a 4th magnitude star appear than a 6th magnitude star?

At its brightest, Venus, at magnitude - 4, is 100 times brighter than a 1st magnitude star.

If we know the average separation and period of revolution for a binary system, we can then measure

The H- R diagram can plot

If a binary is detected by periodic shifts in its spectral lines, it is a(n) _ _ binary.

The full Moon's apparent magnitude is

Why is it difficult to directly measure the size of a star's disk from Earth?

Deneb's estimated distance of 1400 light- years comes from spectroscopic parallax measurements.

Charting the Heavens: the Foundations of Astronomy

The Copernican Revolution: the Birth of Modern Science

Light and Matter: the Inner Workings of the Cosmos

Telescopes: the Tools of Astronomy

The Solar System: Interplanetary Matter and the Birth of the Planets

Earth and Its Moon: Our Cosmic Backyard

The Terrestrial Planets: a Study in Contrasts

The Jovian Planets: Giants of the Solar System

Moons, Rings, and Plutoids: Small Worlds Among Giants

The Sun: Our Parent Star

The Interstellar Medium: Star Formation in the Milky Way

Stellar Evolution: the Lives and Deaths of Stars

Neutron Stars and Black Holes: Strange States of Matter

The Milky Way Galaxy: a Spiral in Space

Normal and Active Galaxies: Building Blocks of the Universe

Hubbles Law and Dark Matter: the Large-Scale Structure of the Cosmos

Cosmology: the Big Bang and the Fate of the Universe

Life in the Universe: Are We Alone

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