Question 1

Discuss how Harlow Shapley determined the structure of the Milky Way galaxy from his study of globular clusters.

Accepted Answer

​ 
Shapley began his research on the sta

Question 2

The Sun will one day pass through the instability strip and become a variable star.

Accepted Answer

A) True 
 B)False

Question 3

The pink color in the above visual image is from __________.

Accepted Answer

A)  a reflection nebula 
B)  a dark nebula 
C)  an emission nebula 
D)  pink stars 
A)  a reflection nebula 
B)  a dark nebula 
C)  an emission nebula 
D)  pink stars

Question 4

The energy source at the center of our galaxy is called

Accepted Answer

A)  Cygnus X-1. 
B)  the Orion arm. 
C)  the Sun. 
D)  Sagittarius A*. 
A)  Cygnus X-1. 
B)  the Orion arm. 
C)  the Sun. 
D)  Sagittarius A*.

Question 5

The orbits of population I stars
I. are confined to disk of the galaxy.
II. are very elliptical.
III. are nearly circular.
IV. are randomly inclined to the disk of the galaxy.

Accepted Answer

A)  I 
B)  IV 
C)  I & IV 
D)  II & IV 
E)  I & III 
A)  I 
B)  IV 
C)  I & IV 
D)  II & IV 
E)  I & III

Question 6

The first scientific attempt to map the Milky Way galaxy

Accepted Answer

A)  showed that the Sun was located in the center of the system of planets making up our galaxy. 
B)  showed that our galaxy is a round ball on which we live. 
C)  showed that our galaxy has 9 stars. 
D)  used globular clusters to determine the location of the center of the Earth. 
E)  was completed by William and Caroline Herschel. 
A)  showed that the Sun was located in the center of the system of planets making up our galaxy. 
B)  showed that our galaxy is a round ball on which we live. 
C)  showed that our galaxy has 9 stars. 
D)  used globular clusters to determine the location of the center of the Earth. 
E)  was completed by William and Caroline Herschel.

Question 7

RR Lyrae stars are in the constellation ___________.

Accepted Answer

The answer of RR Lyrae stars are in the constellation...

Question 8

The density wave theory explains spurs and branches along the spiral arms.

Accepted Answer

A) True 
 B)False

Question 9

In the diagram below, the approximate absolute magnitude of a Type II Cepheid with a period of 30 days is ____________________.

Accepted Answer

The answer of In the diagram below, the approximate absolute...

Question 10

Why are all spiral tracers young?

Accepted Answer

​ 
Spiral tracers are young objects, for

Question 11

Figure 12-1   Refer to Figure 12-1. A Type I Cepheid has been located in an open cluster. The period of the Cepheid variable is 30 days and the variables apparent visual magnitude, m , is 10. First, use 12-1 to estimate the absolute visual magnitude, M . Calculate the distance to this open cluster? Hint: d pc = 10( m - M + 5)/5

Accepted Answer

A)  100 pc 
B)  10,000 pc 
C)  20 pc 
D)  300 pc 
E)  2500 pc 
A)  100 pc 
B)  10,000 pc 
C)  20 pc 
D)  300 pc 
E)  2500 pc

Question 12

The relative abundance of chemical elements are shown by atomic mass number. Which is/are the metal(s)?

Accepted Answer

A)  helium 
B)  carbon, nitrogen, oxygen 
C)  hydrogen, helium 
D)  carbon, nitrogen, oxygen, iron 
A)  helium 
B)  carbon, nitrogen, oxygen 
C)  hydrogen, helium 
D)  carbon, nitrogen, oxygen, iron

Question 13

Sgr A* emits radio waves.

Accepted Answer

A) True 
 B)False

Question 14

As viewed from above or face-on, a ____________ spiral galaxy has many branches and spurs, making the arms less discernible.

Accepted Answer

The answer of As viewed from above or face-on, a...

Question 15

Stars are eternal and unchanging in your lifetime but not over a star's lifetime

Accepted Answer

A) True 
 B)False

Question 16

CO observations of the galaxy reveal

Accepted Answer

A)  the location of dense neutral hydrogen clouds. 
B)  the location of population II stars. 
C)  the location of population I stars. 
D)  the location of the galactic corona. 
E)  the location of giant molecular clouds. 
A)  the location of dense neutral hydrogen clouds. 
B)  the location of population II stars. 
C)  the location of population I stars. 
D)  the location of the galactic corona. 
E)  the location of giant molecular clouds.

Question 17

Which pulsate faster?

Accepted Answer

A)  lower mass, smaller stars 
B)  higher mass, larger stars 
C)  dimmer, smaller stars 
D)  brighter, smaller stars 
A)  lower mass, smaller stars 
B)  higher mass, larger stars 
C)  dimmer, smaller stars 
D)  brighter, smaller stars

Question 18

The nuclear bulge of our galaxy

Accepted Answer

A)  contains stars that are primarily population I stars. 
B)  is primarily composed of gas and dust. 
C)  contains stars primarily associated with the spherical component of our galaxy. 
D)  contains stars primarily associated with the disk component of our galaxy. 
E)  contains stars that are primarily population I stars, is primarily composed of gas and dust, and contains stars primarily associated with the disk component of our galaxy. 
A)  contains stars that are primarily population I stars. 
B)  is primarily composed of gas and dust. 
C)  contains stars primarily associated with the spherical component of our galaxy. 
D)  contains stars primarily associated with the disk component of our galaxy. 
E)  contains stars that are primarily population I stars, is primarily composed of gas and dust, and contains stars primarily associated with the disk component of our galaxy.

Question 19

The energy source at the center of our galaxy

Accepted Answer

A)  is not visible at optical wavelengths. 
B)  produces X-rays. 
C)  must be less than 10 AU in diameter. 
D)  is not visible at optical wavelengths, produces X-rays, and must be less than 10 AU in diameter. 
E)  None of the other choices are correct. 
A)  is not visible at optical wavelengths. 
B)  produces X-rays. 
C)  must be less than 10 AU in diameter. 
D)  is not visible at optical wavelengths, produces X-rays, and must be less than 10 AU in diameter. 
E)  None of the other choices are correct.

Question 20

The pink color tracing the spiral arms are from emission nebulae.

Accepted Answer

A) True 
 B)False

Discuss how Harlow Shapley determined the structure of the Milky Way galaxy from his study of globular clusters.

The Sun will one day pass through the instability strip and become a variable star.

The pink color in the above visual image is from __________.

The energy source at the center of our galaxy is called

The orbits of population I stars I. are confined to disk of the galaxy. II. are very elliptical. III. are nearly circular. IV. are randomly inclined to the disk of the galaxy.

The first scientific attempt to map the Milky Way galaxy

RR Lyrae stars are in the constellation ___________.

The density wave theory explains spurs and branches along the spiral arms.

In the diagram below, the approximate absolute magnitude of a Type II Cepheid with a period of 30 days is ____________________.

Why are all spiral tracers young?

The relative abundance of chemical elements are shown by atomic mass number. Which is/are the metal(s)?

Sgr A* emits radio waves.

As viewed from above or face-on, a ____________ spiral galaxy has many branches and spurs, making the arms less discernible.

Stars are eternal and unchanging in your lifetime but not over a star's lifetime

CO observations of the galaxy reveal

Which pulsate faster?

The nuclear bulge of our galaxy

The energy source at the center of our galaxy

The pink color tracing the spiral arms are from emission nebulae.

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 Family of Stars

The Formation and Structure of Stars

The Deaths of Stars

Neutron Stars and Black Holes

Galaxies: Normal and Active

Modern Cosmology

Origin of the Solar System and Extrasolar Planets

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 12: The Milky Way Galaxy

Discuss how Harlow Shapley determined the structure of the Milky Way galaxy from his study of globular clusters.

The Sun will one day pass through the instability strip and become a variable star.

The pink color in the above visual image is from __________.

The energy source at the center of our galaxy is called

The orbits of population I stars I. are confined to disk of the galaxy. II. are very elliptical. III. are nearly circular. IV. are randomly inclined to the disk of the galaxy.

The first scientific attempt to map the Milky Way galaxy

RR Lyrae stars are in the constellation ___________.

The density wave theory explains spurs and branches along the spiral arms.

In the diagram below, the approximate absolute magnitude of a Type II Cepheid with a period of 30 days is ____________________.

Why are all spiral tracers young?

The relative abundance of chemical elements are shown by atomic mass number. Which is/are the metal(s)?

Sgr A* emits radio waves.

As viewed from above or face-on, a ____________ spiral galaxy has many branches and spurs, making the arms less discernible.

Stars are eternal and unchanging in your lifetime but not over a star's lifetime

CO observations of the galaxy reveal

Which pulsate faster?

The nuclear bulge of our galaxy

The energy source at the center of our galaxy

The pink color tracing the spiral arms are from emission nebulae.

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 Family of Stars

The Formation and Structure of Stars

The Deaths of Stars

Neutron Stars and Black Holes

Galaxies: Normal and Active

Modern Cosmology

Origin of the Solar System and Extrasolar Planets

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