Question 1

Who first determined that the energy/s emitted by (luminosity of) Cepheid variable stars is larger the longer their period of variation is?

Accepted Answer

A)  Henrietta Leavitt 
B)  Edwin Hubble 
C)  John Glenn 
D)  Carl Sagan 
E)  Harlow Shapley 
A)  Henrietta Leavitt 
B)  Edwin Hubble 
C)  John Glenn 
D)  Carl Sagan 
E)  Harlow Shapley

Question 2

Which stellar population has highly elliptical orbits?

Accepted Answer

A)  Pop I extreme 
B)  Pop I intermediate 
C)  Pop II intermediate 
D)  Pop II extreme 
A)  Pop I extreme 
B)  Pop I intermediate 
C)  Pop II intermediate 
D)  Pop II extreme

Question 3

The traditional "top-down" hypothesis of the formation of our galaxy cannot explain

Accepted Answer

A)  why not all globular clusters are the same age. 
B)  why the youngest globular clusters are in the outer halo. 
C)  why the oldest stars are metal poor but not completely metal free. 
D)  streams and rings of scattered stars in the halo. 
E)  All of the other choices are correct. 
A)  why not all globular clusters are the same age. 
B)  why the youngest globular clusters are in the outer halo. 
C)  why the oldest stars are metal poor but not completely metal free. 
D)  streams and rings of scattered stars in the halo. 
E)  All of the other choices are correct.

Question 4

Discuss how astronomers know that our galaxy contains spiral arms in its disk.

Accepted Answer

Radio astronomers use the strong spectra

Question 5

Radio maps of the spiral arms of our galaxy

Accepted Answer

A)  reveal that our galaxy is a grand design spiral. 
B)  map the location of hot O and B stars by the radio radiation they emit. 
C)  reveal that the spiral arms are winding up and growing closer together. 
D)  reveal that the Sun is currently located in the center of a spiral arm. 
E)  map the location of dense neutral hydrogen clouds. 
A)  reveal that our galaxy is a grand design spiral. 
B)  map the location of hot O and B stars by the radio radiation they emit. 
C)  reveal that the spiral arms are winding up and growing closer together. 
D)  reveal that the Sun is currently located in the center of a spiral arm. 
E)  map the location of dense neutral hydrogen clouds.

Question 6

More massive stars are _________ luminous and __________ than less massive stars, thus they pulsate _____________.

Accepted Answer

A)  less, smaller, faster 
B)  more, larger, slower 
C)  more, larger, slower. 
D)  less, smaller, faster. 
A)  less, smaller, faster 
B)  more, larger, slower 
C)  more, larger, slower. 
D)  less, smaller, faster.

Question 7

In which direction is the above spiral galaxy rotating and which color best represents where the gas is being compressed by the spiral density wave?

Accepted Answer

A)  clockwise, blue 
B)  counter-clockwise, pink 
C)  clockwise, pink 
D)  counter-clockwise, blue 
A)  clockwise, blue 
B)  counter-clockwise, pink 
C)  clockwise, pink 
D)  counter-clockwise, blue

Question 8

Sgr A* is believed to be the center of the Milky Way galaxy because
I. it lies in the general direction of the center of the galaxy based on observations of globular clusters in the plane of the Milky Way.
II. long-wavelength dust-penetrating images show it to be a region crowded with stars.
III. orbits of stars around it indicate a mass several million times that of the Sun within a volume a few light hours in size.
IV. radio observations show it is a concentrated source at the center of swirling clouds of gas.

Accepted Answer

A)  I & II only 
B)  II & III only 
C)  I & IV only 
D)  II & IV only 
E)  All of I, II, III, & IV 
A)  I & II only 
B)  II & III only 
C)  I & IV only 
D)  II & IV only 
E)  All of I, II, III, & IV

Question 9

Population II stars contain more metals than Population I stars.

Accepted Answer

A) True 
 B)False

Question 10

​ 
M dwarf main-sequence stars pass through the instability strip as shown above.

Accepted Answer

A) True 
 B)False

Question 11

Getting a cold is like building the chemical elements in nucleosynthesis.

Accepted Answer

A) True 
 B)False

Question 12

___________ in other galaxies should contain luminous O and B stars if they are like the Milky Way.

Accepted Answer

A)  The halos 
B)  The bulges 
C)  The spiral arms 
D)  The globular clusters 
E)  The coronas 
A)  The halos 
B)  The bulges 
C)  The spiral arms 
D)  The globular clusters 
E)  The coronas

Question 13

Which of the above shown variable types is brightest?

Accepted Answer

A)  RR Lyrae 
B)  Type II 
C)  Type I 
D)  all are equally as bright 
A)  RR Lyrae 
B)  Type II 
C)  Type I 
D)  all are equally as bright

Question 14

The spherical component is the __________.

Accepted Answer

A)  halo 
B)  bulge 
C)  halo and bulge 
D)  dark matter 
A)  halo 
B)  bulge 
C)  halo and bulge 
D)  dark matter

Question 15

Describe the central bulge of our galaxy.

Accepted Answer

​ 
It is a flattened cloud of billions o

Question 16

The _________________ hypothesis includes mergers with smaller galaxies and infalling gas to the standard formation of the Milky Way galaxy.

Accepted Answer

The answer of The _________________ hypothesis includes mergers with smaller...

Question 17

​ What is the difference between a population I star and a population II star?

Accepted Answer

​ 
Population I stars are metal rich, co

Question 18

The rapid rotation in the outer disk suggests that our galaxy is more massive than previously thought.

Accepted Answer

A) True 
 B)False

Question 19

The Sun is located near a spiral arm.

Accepted Answer

A) True 
 B)False

Question 20

The ____________________ of the galaxy contains population I stars, open clusters, and gas clouds.

Accepted Answer

The answer of The ____________________ of the galaxy contains population...

Who first determined that the energy/s emitted by (luminosity of) Cepheid variable stars is larger the longer their period of variation is?

Which stellar population has highly elliptical orbits?

The traditional "top-down" hypothesis of the formation of our galaxy cannot explain

Discuss how astronomers know that our galaxy contains spiral arms in its disk.

Radio maps of the spiral arms of our galaxy

More massive stars are _ luminous and than less massive stars, thus they pulsate _______.

In which direction is the above spiral galaxy rotating and which color best represents where the gas is being compressed by the spiral density wave?

Population II stars contain more metals than Population I stars.

M dwarf main-sequence stars pass through the instability strip as shown above.

Getting a cold is like building the chemical elements in nucleosynthesis.

___________ in other galaxies should contain luminous O and B stars if they are like the Milky Way.

Which of the above shown variable types is brightest?

The spherical component is the __________.

Describe the central bulge of our galaxy.

The _________________ hypothesis includes mergers with smaller galaxies and infalling gas to the standard formation of the Milky Way galaxy.

What is the difference between a population I star and a population II star?

The rapid rotation in the outer disk suggests that our galaxy is more massive than previously thought.

The Sun is located near a spiral arm.

The ____________________ of the galaxy contains population I stars, open clusters, and gas clouds.

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

Who first determined that the energy/s emitted by (luminosity of) Cepheid variable stars is larger the longer their period of variation is?

Which stellar population has highly elliptical orbits?

The traditional "top-down" hypothesis of the formation of our galaxy cannot explain

Discuss how astronomers know that our galaxy contains spiral arms in its disk.

Radio maps of the spiral arms of our galaxy

More massive stars are _________ luminous and __________ than less massive stars, thus they pulsate _____________.

In which direction is the above spiral galaxy rotating and which color best represents where the gas is being compressed by the spiral density wave?

Population II stars contain more metals than Population I stars.

​ M dwarf main-sequence stars pass through the instability strip as shown above.

Getting a cold is like building the chemical elements in nucleosynthesis.

___________ in other galaxies should contain luminous O and B stars if they are like the Milky Way.

Which of the above shown variable types is brightest?

The spherical component is the __________.

Describe the central bulge of our galaxy.

The _________________ hypothesis includes mergers with smaller galaxies and infalling gas to the standard formation of the Milky Way galaxy.

​ What is the difference between a population I star and a population II star?

The rapid rotation in the outer disk suggests that our galaxy is more massive than previously thought.

The Sun is located near a spiral arm.

The ____________________ of the galaxy contains population I stars, open clusters, and gas clouds.

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

More massive stars are _ luminous and than less massive stars, thus they pulsate _______.

M dwarf main-sequence stars pass through the instability strip as shown above.

What is the difference between a population I star and a population II star?