Question 1

How does the interstellar medium obscure our view of most of the galaxy?

Accepted Answer

A) It produces so much visible light that it is opaque and blocks our view of anything beyond it. 
B) It reflects most light from far distances of the galaxy away from our line of sight. 
C) It absorbs all wavelengths of light. 
D) It absorbs visible,ultraviolet,and some infrared light. 
E) all of the above 
A) It produces so much visible light that it is opaque and blocks our view of anything beyond it. 
B) It reflects most light from far distances of the galaxy away from our line of sight. 
C) It absorbs all wavelengths of light. 
D) It absorbs visible,ultraviolet,and some infrared light. 
E) all of the above

Question 2

What is the thickness of the disk of the Milky Way?

Accepted Answer

A) 100 light-years 
B) 1,000 light-years 
C) 10,000 light-years 
D) 100,000 light-years 
E) 1,000,000 light-years 
A) 100 light-years 
B) 1,000 light-years 
C) 10,000 light-years 
D) 100,000 light-years 
E) 1,000,000 light-years

Question 3

Approximately how long does it take the Sun to orbit the Milky Way Galaxy?

Accepted Answer

A) 23,000 years 
B) 230,000 years 
C) 2.3 million years 
D) 230 million years 
E) 23 billion years 
A) 23,000 years 
B) 230,000 years 
C) 2.3 million years 
D) 230 million years 
E) 23 billion years

Question 4

How would you expect a star that formed recently in the disk of the galaxy to differ from one that formed early in the history of the disk?

Accepted Answer

A) It should be higher in mass. 
B) It should have a higher fraction of elements heavier than hydrogen and helium. 
C) It should be much brighter. 
D) It should orbit the galactic center at a much higher rate of speed. 
E) All of the above would be expected. 
A) It should be higher in mass. 
B) It should have a higher fraction of elements heavier than hydrogen and helium. 
C) It should be much brighter. 
D) It should orbit the galactic center at a much higher rate of speed. 
E) All of the above would be expected.

Question 5

Explain why,in space,"no one can hear you scream."

Accepted Answer

Screams,and any sound that we make,are w

Question 6

What kinds of objects lie in the halo of our galaxy?

Accepted Answer

A) open clusters 
B) O and B stars 
C) globular clusters 
D) gas and dust 
E) all of the above 
A) open clusters 
B) O and B stars 
C) globular clusters 
D) gas and dust 
E) all of the above

How does the interstellar medium obscure our view of most of the galaxy?

What is the thickness of the disk of the Milky Way?

Approximately how long does it take the Sun to orbit the Milky Way Galaxy?

How would you expect a star that formed recently in the disk of the galaxy to differ from one that formed early in the history of the disk?

Explain why,in space,"no one can hear you scream."

What kinds of objects lie in the halo of our galaxy?

A Modern View of the Universe

Discovering the Universe for Yourself

The Science of Astronomy

Making Sense of the Universe: Understanding Motion, Energy, and Gravity

Light and Matter: Reading Messages from the Cosmos

Telescopes: Portals of Discovery

Our Planetary System

Formation of the Solar System

Planetary Geology: Earth and the Other Terrestrial Worlds

Planetary Atmospheres: Earth and the Other Terrestrial Worlds

Jovian Planet Systems

Asteroids, Comets, and Dwarf Planets: Their Nature, Orbits, and Impacts

Other Planetary Systems: The New Science of Distant Worlds

Our Star

Surveying the Stars

Star Birth

Star Stuff

The Bizarre Stellar Graveyard

Galaxies and the Foundations of Modern Cosmology

Galaxy Evolution

The Birth of the Universe

Dark Matter, Dark Energy, and the Fate of the Universe

Life in the Universe

Celestial Timekeeping and Navigation

Space and Time

Spacetime and Gravity

Building Blocks of the Universe

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Exam 19: Our Galaxy

How does the interstellar medium obscure our view of most of the galaxy?

What is the thickness of the disk of the Milky Way?

Approximately how long does it take the Sun to orbit the Milky Way Galaxy?

How would you expect a star that formed recently in the disk of the galaxy to differ from one that formed early in the history of the disk?

Explain why,in space,"no one can hear you scream."

What kinds of objects lie in the halo of our galaxy?

A Modern View of the Universe

Discovering the Universe for Yourself

The Science of Astronomy

Making Sense of the Universe: Understanding Motion, Energy, and Gravity

Light and Matter: Reading Messages from the Cosmos

Telescopes: Portals of Discovery

Our Planetary System

Formation of the Solar System

Planetary Geology: Earth and the Other Terrestrial Worlds

Planetary Atmospheres: Earth and the Other Terrestrial Worlds

Jovian Planet Systems

Asteroids, Comets, and Dwarf Planets: Their Nature, Orbits, and Impacts

Other Planetary Systems: The New Science of Distant Worlds

Our Star

Surveying the Stars

Star Birth

Star Stuff

The Bizarre Stellar Graveyard

Galaxies and the Foundations of Modern Cosmology

Galaxy Evolution

The Birth of the Universe

Dark Matter, Dark Energy, and the Fate of the Universe

Life in the Universe

Celestial Timekeeping and Navigation

Space and Time

Spacetime and Gravity

Building Blocks of the Universe

Filters