Question 1

The Hipparcos satellite has extended our accurate parallax distance measurements to over 200 parsecs.

Accepted Answer

A) True 
 B)False

Question 2

Which star has the largest proper motion? Why?

Accepted Answer

Barnard's Star lies only about

Question 3

The Hipparcos data give us

Accepted Answer

A)  parallaxes to the nearest galaxies. 
B)  parallaxes as small as 0.005". 
C)  information on only the 6,000 brightest stars. 
D)  distances to about 100 billion stars, practically everything in the Milky Way Galaxy. 
E)  an accurate distance to the Moon. 
A)  parallaxes to the nearest galaxies. 
B)  parallaxes as small as 0.005". 
C)  information on only the 6,000 brightest stars. 
D)  distances to about 100 billion stars, practically everything in the Milky Way Galaxy. 
E)  an accurate distance to the Moon.

Question 4

Our best stellar parallax measurements to date come from

Accepted Answer

A)  the Hipparcos satellite. 
B)  radio interferometry. 
C)  ground based measurements taken six months apart. 
D)  observations made by astronauts. 
E)  the Keck telescope. 
A)  the Hipparcos satellite. 
B)  radio interferometry. 
C)  ground based measurements taken six months apart. 
D)  observations made by astronauts. 
E)  the Keck telescope.

Question 5

The absolute magnitude of the Sun is

Accepted Answer

A)  - 26.7. 
B)  - 12.1. 
C)  0. 
D)  +4.8. 
E)  +26.7. 
A)  - 26.7. 
B)  - 12.1. 
C)  0. 
D)  +4.8. 
E)  +26.7.

Question 6

Which type of binary can have their sizes measured directly by photometry?

Accepted Answer

A)  virtual 
B)  astrometric 
C)  visual 
D)  eclipsing 
E)  spectroscopic 
A)  virtual 
B)  astrometric 
C)  visual 
D)  eclipsing 
E)  spectroscopic

Question 7

In what range of masses are most stars found?

Accepted Answer

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

Question 8

Almost all stars on the main sequence range from 0.1 to 15 solar radii.

Accepted Answer

A) True 
 B)False

Question 9

Most stars are single stars like our Sun.

Accepted Answer

A) True 
 B)False

Question 10

The star's _ _ plays the major role in determining its main sequence position and luminosity.

Accepted Answer

The answer of The star's _ _ plays the major...

Question 11

Stars of the main sequence, like our own, are all converting into helium.

Accepted Answer

The answer of Stars of the main sequence, like our...

Question 12

Explain the difference between radial and transverse velocities.

Accepted Answer

Radial velocity is found from Doppler sh

Question 13

Only type O stars are hot enough to show ionized _ in their spectra.

Accepted Answer

The answer of Only type O stars are hot enough...

Question 14

Contrast apparent and absolute magnitudes.

Accepted Answer

The apparent magnitude is how bright it

Question 15

What color are most of the stars closest to the Sun?

Accepted Answer

The answer of What color are most of the stars...

Question 16

A star of the same diameter, but twice as hot as our Sun, must be 16 times more luminous.

Accepted Answer

A) True 
 B)False

Question 17

What two properties of the stars were Hertzsprung and Russell comparing?

Accepted Answer

Vertically they plotted the lu

Question 18

Describe the distance and composition of the Alpha Centauri system.

Accepted Answer

The Alpha Centauri system is composed of

Question 19

The nearest star system to our Sun, Alpha Centauri, is still over a parsec distant.

Accepted Answer

A) True 
 B)False

Question 20

The stars with masses comparable to our Sun's, but sizes like the Earth are

Accepted Answer

A)  red main sequence stars. 
B)  red giants. 
C)  neutron stars. 
D)  blue main sequence stars. 
E)  white dwarfs. 
A)  red main sequence stars. 
B)  red giants. 
C)  neutron stars. 
D)  blue main sequence stars. 
E)  white dwarfs.

The Hipparcos satellite has extended our accurate parallax distance measurements to over 200 parsecs.

Which star has the largest proper motion? Why?

The Hipparcos data give us

Our best stellar parallax measurements to date come from

The absolute magnitude of the Sun is

Which type of binary can have their sizes measured directly by photometry?

In what range of masses are most stars found?

Almost all stars on the main sequence range from 0.1 to 15 solar radii.

Most stars are single stars like our Sun.

The star's _ _ plays the major role in determining its main sequence position and luminosity.

Stars of the main sequence, like our own, are all converting into helium.

Explain the difference between radial and transverse velocities.

Only type O stars are hot enough to show ionized _ in their spectra.

Contrast apparent and absolute magnitudes.

What color are most of the stars closest to the Sun?

A star of the same diameter, but twice as hot as our Sun, must be 16 times more luminous.

What two properties of the stars were Hertzsprung and Russell comparing?

Describe the distance and composition of the Alpha Centauri system.

The nearest star system to our Sun, Alpha Centauri, is still over a parsec distant.

The stars with masses comparable to our Sun's, but sizes like the Earth are

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

The Hipparcos satellite has extended our accurate parallax distance measurements to over 200 parsecs.

Which star has the largest proper motion? Why?

The Hipparcos data give us

Our best stellar parallax measurements to date come from

The absolute magnitude of the Sun is

Which type of binary can have their sizes measured directly by photometry?

In what range of masses are most stars found?

Almost all stars on the main sequence range from 0.1 to 15 solar radii.

Most stars are single stars like our Sun.

The star's _ _ plays the major role in determining its main sequence position and luminosity.

Stars of the main sequence, like our own, are all converting into helium.

Explain the difference between radial and transverse velocities.

Only type O stars are hot enough to show ionized _ in their spectra.

Contrast apparent and absolute magnitudes.

What color are most of the stars closest to the Sun?

A star of the same diameter, but twice as hot as our Sun, must be 16 times more luminous.

What two properties of the stars were Hertzsprung and Russell comparing?

Describe the distance and composition of the Alpha Centauri system.

The nearest star system to our Sun, Alpha Centauri, is still over a parsec distant.

The stars with masses comparable to our Sun's, but sizes like the Earth are

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

Filters