Question 1

You want to find a mass of a star on the main sequence of the H-R diagram. What do you need

Accepted Answer

A) The star has to be in a visual binary. 
B) The star has to be in a spectroscopic binary. 
C) You need the star's luminosity. 
D) You need the star's absorption spectra. 
A) The star has to be in a visual binary. 
B) The star has to be in a spectroscopic binary. 
C) You need the star's luminosity. 
D) You need the star's absorption spectra.

Question 2

-Which star in Diagram 8-1 has the greatest surface temperature

Accepted Answer

A) Alnilam 
B) Antares 
C) Arcturus 
D) HR 5337 
E) Sirius B 
A) Alnilam 
B) Antares 
C) Arcturus 
D) HR 5337 
E) Sirius B

Question 3

How does density divide the stars in the H-R diagram into three groups

Accepted Answer

Density divides stars into thr

Question 4

In an eclipsing binary, the orbits are face-on so you can see both stars orbiting each other at all times.

Accepted Answer

A) True 
 B)False

Question 5

M dwarfs on the main sequence are brown dwarfs.

Accepted Answer

A) True 
 B)False

Question 6

What is the total mass of a binary star system with P = 20 yr and a = 10 AU

Accepted Answer

A) 2 solar masses 
B) 2.5 solar masses 
C) 0.5 solar mass 
D) 80 solar masses 
E) 0.4 solar mass 
A) 2 solar masses 
B) 2.5 solar masses 
C) 0.5 solar mass 
D) 80 solar masses 
E) 0.4 solar mass

Question 7

How can we tell that some stars are relatively close to us in the sky

Accepted Answer

A) Some stars are occasionally eclipsed by the Moon, so they must be nearby. 
B) Some stars vary in brightness caused by sunspots we can see because they are so close. 
C) Some stars appear to be extremely bright and must therefore be very close to us. 
D) Some stars appear to move periodically back and forth against the background stars because of Earth's movement around the Sun. 
A) Some stars are occasionally eclipsed by the Moon, so they must be nearby. 
B) Some stars vary in brightness caused by sunspots we can see because they are so close. 
C) Some stars appear to be extremely bright and must therefore be very close to us. 
D) Some stars appear to move periodically back and forth against the background stars because of Earth's movement around the Sun.

Question 8

Polaris is 10 times larger than Capella A and both are the same color. How much brighter or dimmer is Polaris to Capella

Accepted Answer

A) 10× brighter 
B) 10× dimmer 
C) 100× brighter 
D) 100× dimmer 
A) 10× brighter 
B) 10× dimmer 
C) 100× brighter 
D) 100× dimmer

Question 9

The light curve of a/an ___________ binary can reveal both masses and diameters of the stars.

Accepted Answer

The answer of The light curve of a/an ___________ binary...

Question 10

Below is a radial velocity curve for a spectroscopic binary. Which of the stars is most massive ____________________

Accepted Answer

The answer of Below is a radial velocity curve for...

You want to find a mass of a star on the main sequence of the H-R diagram. What do you need

-Which star in Diagram 8-1 has the greatest surface temperature

How does density divide the stars in the H-R diagram into three groups

In an eclipsing binary, the orbits are face-on so you can see both stars orbiting each other at all times.

M dwarfs on the main sequence are brown dwarfs.

What is the total mass of a binary star system with P = 20 yr and a = 10 AU

How can we tell that some stars are relatively close to us in the sky

Polaris is 10 times larger than Capella A and both are the same color. How much brighter or dimmer is Polaris to Capella

The light curve of a/an ___________ binary can reveal both masses and diameters of the stars.

Below is a radial velocity curve for a spectroscopic binary. Which of the stars is most massive ____________________

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

You want to find a mass of a star on the main sequence of the H-R diagram. What do you need

-Which star in Diagram 8-1 has the greatest surface temperature

How does density divide the stars in the H-R diagram into three groups

In an eclipsing binary, the orbits are face-on so you can see both stars orbiting each other at all times.

M dwarfs on the main sequence are brown dwarfs.

What is the total mass of a binary star system with P = 20 yr and a = 10 AU

How can we tell that some stars are relatively close to us in the sky

Polaris is 10 times larger than Capella A and both are the same color. How much brighter or dimmer is Polaris to Capella

The light curve of a/an ___________ binary can reveal both masses and diameters of the stars.

Below is a radial velocity curve for a spectroscopic binary. Which of the stars is most massive ____________________

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