Question 1

Harlow Shapley found the distance to the centre of the galaxy by studying the distance to open clusters.

Accepted Answer

A) True 
 B)False  False

Question 2

How did Harlow Shapley determine where the centre of the galaxy lies?

Accepted Answer

A) He plotted the distribution of open clusters. 
B) He plotted the distribution of globular clusters. 
C) He made star counts in every direction of the galactic disk. 
D) He measured the amount of dust obscuration in every direction of the galactic disk. 
A) He plotted the distribution of open clusters. 
B) He plotted the distribution of globular clusters. 
C) He made star counts in every direction of the galactic disk. 
D) He measured the amount of dust obscuration in every direction of the galactic disk. B

Question 3

-Refer to the figure.A Type II Cepheid with a period of 10 days has been located in a distant globular cluster.What is the star's absolute magnitude?

Accepted Answer

A) -6 
B) -4 
C) -1 
D) 0 
A) -6 
B) -4 
C) -1 
D) 0 C

Question 4

What does the chemical abundance found in population I stars tell us about them?

Accepted Answer

A) It indicates that they are all massive stars. 
B) It indicates that they were formed before the population II stars. 
C) It indicates that they contain very few heavy metals compared to halo stars. 
D) It indicates that the material they formed from had been enriched with material from supernovae. 
A) It indicates that they are all massive stars. 
B) It indicates that they were formed before the population II stars. 
C) It indicates that they contain very few heavy metals compared to halo stars. 
D) It indicates that the material they formed from had been enriched with material from supernovae.

Question 5

Before the twentieth century,astronomers lacked knowledge of something,and this caused them to think that the Sun was at the centre of our star system.What was that something?

Accepted Answer

A) globular clusters 
B) Cepheid variable stars 
C) the dimming effects of gas and dust 
D) galactic rotation 
A) globular clusters 
B) Cepheid variable stars 
C) the dimming effects of gas and dust 
D) galactic rotation

Question 6

Who first noticed that for Cepheid variable stars there was a direct relationship between the luminosity and the period of the variation in their brightness?

Accepted Answer

A) Annie Cannon 
B) Edwin Hubble 
C) Harlow Shapley 
D) Henrietta Leavitt 
A) Annie Cannon 
B) Edwin Hubble 
C) Harlow Shapley 
D) Henrietta Leavitt

Question 7

The centre of our galaxy shows signs of past eruptions.

Accepted Answer

A) True 
 B)False

Question 8

Why do younger stars have more heavy elements?

Accepted Answer

A) because old stars destroy heavy elements as they age 
B) because the heavy elements were made in previous generations of stars 
C) because young stars burn their nuclear fuels faster 
D) because heavy elements haven't had time to settle to the core of these younger stars 
A) because old stars destroy heavy elements as they age 
B) because the heavy elements were made in previous generations of stars 
C) because young stars burn their nuclear fuels faster 
D) because heavy elements haven't had time to settle to the core of these younger stars

Question 9

____________________ are groups of 100,000 to 1,000,000 population II stars firmly bound together by gravity.

Accepted Answer

The answer of ____________________ are groups of 100,000 to 1,000,000...

Question 10

-Refer to the figure.Why is it more difficult to measure the distances to globular clusters (which contain RR Lyrae stars)than the distances to open clusters (which contain Cepheids)?

Accepted Answer

A) RR Lyrae stars are dimmer and harder to see. 
B) RR Lyrae stars pulsate so fast that they can't be measured. 
C) RR Lyrae stars are further away than Cepheids. 
D) RR Lyrae stars do not have a relationship between period and luminosity. 
A) RR Lyrae stars are dimmer and harder to see. 
B) RR Lyrae stars pulsate so fast that they can't be measured. 
C) RR Lyrae stars are further away than Cepheids. 
D) RR Lyrae stars do not have a relationship between period and luminosity.

Question 11

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

Accepted Answer

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

Question 12

Old stars are poor in heavy atoms because there were very few previous generations of stars before the old stars formed.

Accepted Answer

A) True 
 B)False

Question 13

The disk of the Milky Way is approximately 20,000 light years in diameter.

Accepted Answer

A) True 
 B)False

Question 14

If other galaxies are like the Milky Way,which parts of them should contain luminous O and B type stars?

Accepted Answer

A) the halos 
B) the bulges 
C) the spiral arms 
D) the globular clusters 
A) the halos 
B) the bulges 
C) the spiral arms 
D) the globular clusters

Question 15

Describe the central few light-years of our galaxy.

Accepted Answer

The central few light-years of our galax

Question 16

The centre of our galaxy is located in the direction of the constellation of Orion.

Accepted Answer

A) True 
 B)False

Question 17

Henrietta Leavitt discovered the period-luminosity relationship for __________________.

Accepted Answer

The answer of Henrietta Leavitt discovered the period-luminosity relationship for...

Question 18

What kind of orbits did the first stars to form in our galaxy have?

Accepted Answer

A) circular orbits 
B) hyperbolic orbits 
C) slightly elliptical orbits, all in the same plane 
D) highly elongated elliptical orbits 
A) circular orbits 
B) hyperbolic orbits 
C) slightly elliptical orbits, all in the same plane 
D) highly elongated elliptical orbits

Question 19

Where are Population II stars found?

Accepted Answer

A) in the galaxy's globular clusters 
B) in the disk of the galaxy 
C) in the centre of the galaxy 
D) in the galaxy's spiral arms 
A) in the galaxy's globular clusters 
B) in the disk of the galaxy 
C) in the centre of the galaxy 
D) in the galaxy's spiral arms

Question 20

Why are Cepheid variable stars important in our study of the Milky Way galaxy?

Accepted Answer

The answer of Why are Cepheid variable stars important in...

Harlow Shapley found the distance to the centre of the galaxy by studying the distance to open clusters.

How did Harlow Shapley determine where the centre of the galaxy lies?

-Refer to the figure.A Type II Cepheid with a period of 10 days has been located in a distant globular cluster.What is the star's absolute magnitude?

What does the chemical abundance found in population I stars tell us about them?

Before the twentieth century,astronomers lacked knowledge of something,and this caused them to think that the Sun was at the centre of our star system.What was that something?

Who first noticed that for Cepheid variable stars there was a direct relationship between the luminosity and the period of the variation in their brightness?

The centre of our galaxy shows signs of past eruptions.

Why do younger stars have more heavy elements?

____________________ are groups of 100,000 to 1,000,000 population II stars firmly bound together by gravity.

-Refer to the figure.Why is it more difficult to measure the distances to globular clusters (which contain RR Lyrae stars)than the distances to open clusters (which contain Cepheids)?

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

Old stars are poor in heavy atoms because there were very few previous generations of stars before the old stars formed.

The disk of the Milky Way is approximately 20,000 light years in diameter.

If other galaxies are like the Milky Way,which parts of them should contain luminous O and B type stars?

Describe the central few light-years of our galaxy.

The centre of our galaxy is located in the direction of the constellation of Orion.

Henrietta Leavitt discovered the period-luminosity relationship for __________________.

What kind of orbits did the first stars to form in our galaxy have?

Where are Population II stars found?

Why are Cepheid variable stars important in our study of the Milky Way galaxy?

The Scale of the Cosmos

User's Guide to the Sky

The Origin of Modern Astronomy

Astronomical Telescopes and Instruments

Sun Light and Sun Atoms

The Family of Stars

The Structure and Formation of Stars

The Deaths of Stars

Galaxies

Cosmology in the 21st Century

The Origin of the Solar System

Comparative Planetology of the Terrestrial Planets

Comparative Planetology of the Jovian Planets

Life on Other Worlds

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Exam 9: The Milky Way Galaxy

Harlow Shapley found the distance to the centre of the galaxy by studying the distance to open clusters.

How did Harlow Shapley determine where the centre of the galaxy lies?

-Refer to the figure.A Type II Cepheid with a period of 10 days has been located in a distant globular cluster.What is the star's absolute magnitude?

What does the chemical abundance found in population I stars tell us about them?

Before the twentieth century,astronomers lacked knowledge of something,and this caused them to think that the Sun was at the centre of our star system.What was that something?

Who first noticed that for Cepheid variable stars there was a direct relationship between the luminosity and the period of the variation in their brightness?

The centre of our galaxy shows signs of past eruptions.

Why do younger stars have more heavy elements?

____________________ are groups of 100,000 to 1,000,000 population II stars firmly bound together by gravity.

-Refer to the figure.Why is it more difficult to measure the distances to globular clusters (which contain RR Lyrae stars)than the distances to open clusters (which contain Cepheids)?

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

Old stars are poor in heavy atoms because there were very few previous generations of stars before the old stars formed.

The disk of the Milky Way is approximately 20,000 light years in diameter.

If other galaxies are like the Milky Way,which parts of them should contain luminous O and B type stars?

Describe the central few light-years of our galaxy.

The centre of our galaxy is located in the direction of the constellation of Orion.

Henrietta Leavitt discovered the period-luminosity relationship for __________________.

What kind of orbits did the first stars to form in our galaxy have?

Where are Population II stars found?

Why are Cepheid variable stars important in our study of the Milky Way galaxy?

The Scale of the Cosmos

User's Guide to the Sky

The Origin of Modern Astronomy

Astronomical Telescopes and Instruments

Sun Light and Sun Atoms

The Family of Stars

The Structure and Formation of Stars

The Deaths of Stars

Galaxies

Cosmology in the 21st Century

The Origin of the Solar System

Comparative Planetology of the Terrestrial Planets

Comparative Planetology of the Jovian Planets

Life on Other Worlds

Filters