Question 1

Sagittarius A* was first noted due to its strong emissions.

Accepted Answer

A)  infrared 
B)  gamma ray 
C)  ultraviolet 
D)  radio 
E)  X- ray 
A)  infrared 
B)  gamma ray 
C)  ultraviolet 
D)  radio 
E)  X- ray D

Question 2

How did Herschel try to map our Galaxy 200 years ago, and why did he fail?

Accepted Answer

His star counts revealed the galactic disk, but the dark nebulae of dust blocked everything except the closer spiral arms, making him think we lay near the center.

Question 3

What observations suggest the mass of the Galaxy goes much farther out than its visible disc?

Accepted Answer

A)  the rotation curve of the outermost portions of the disc 
B)  infrared observations of distant brown dwarfs 
C)  the orbits of the open clusters in the disc 
D)  21- cm maps of the spiral arms 
E)  X- ray images of other galaxies' discs from Chandra 
A)  the rotation curve of the outermost portions of the disc 
B)  infrared observations of distant brown dwarfs 
C)  the orbits of the open clusters in the disc 
D)  21- cm maps of the spiral arms 
E)  X- ray images of other galaxies' discs from Chandra A

Question 4

Virtually the entire disk of the Galaxy has been mapped using the wavelength.

Accepted Answer

The answer of Virtually the entire disk of the Galaxy...

Question 5

Dark matter has not been observed at any electromagnetic wavelength.

Accepted Answer

A) True 
 B)False

Question 6

If our Sun belonged to Population II, it is unlikely that planets could orbit it.

Accepted Answer

The answer of If our Sun belonged to Population II,...

Question 7

Because of their greater luminosity, RR Lyrae stars can be used at greater distances than can long- period Cepheids.

Accepted Answer

A) True 
 B)False

Question 8

Contrast the observed visible mass of the Galaxy with its suspected total. Explain the difference.

Accepted Answer

From the Sun inward, we measure about 10

Question 9

The Milky Way is similar in many ways to M31, the Andromeda Galaxy.

Accepted Answer

A) True 
 B)False

Question 10

Which is the correct description of the Sun's location within the Milky Way?

Accepted Answer

A)  in the disc but at its outer edge 
B)  in the disc and about one- half a galactic radius from the center 
C)  as Herschel found, very close to the Galactic center 
D)  above the disc and about one- third of the galactic radius from the center 
E)  at the outer edge of the galactic bulge but in the plane of the disc 
A)  in the disc but at its outer edge 
B)  in the disc and about one- half a galactic radius from the center 
C)  as Herschel found, very close to the Galactic center 
D)  above the disc and about one- third of the galactic radius from the center 
E)  at the outer edge of the galactic bulge but in the plane of the disc

Question 11

Most of the new star formation in the Galaxy is found in the

Accepted Answer

A)  galactic center. 
B)  spiral arms. 
C)  globular clusters. 
D)  bulge. 
E)  halo. 
A)  galactic center. 
B)  spiral arms. 
C)  globular clusters. 
D)  bulge. 
E)  halo.

Question 12

The spherical distribution of the globular clusters in the Halo reminds us of the similar distribution of cometary nuclei in the cloud.

Accepted Answer

A)  Kuiper 
B)  Kepler 
C)  Oort 
D)  Hubble 
E)  Shapley 
A)  Kuiper 
B)  Kepler 
C)  Oort 
D)  Hubble 
E)  Shapley

Question 13

It is the distribution of _ atoms in the spiral arms that is measured with 21- cm radio maps.

Accepted Answer

The answer of It is the distribution of _ atoms...

Question 14

Our Sun lies about 30,000 light-years out from the Galactic Center.

Accepted Answer

A) True 
 B)False

Question 15

The two stellar populations are extremes, but, in fact, stars with intermediate properties are common.

Accepted Answer

A) True 
 B)False

Question 16

What is the mass of the black hole believed to be at the center of the Milky Way? How do we know?

Accepted Answer

Studies of the motions of gas

Question 17

Which sequence of formation is most likely to be correct, oldest to youngest?

Accepted Answer

A)  emission nebulae, planetary nebulae, dark nebulae 
B)  halo, spiral arms, globular clusters 
C)  planetary nebulae, Population I stars, population II stars 
D)  Population I stars, population II stars, population III stars 
E)  globular clusters, open clusters, OB associations 
A)  emission nebulae, planetary nebulae, dark nebulae 
B)  halo, spiral arms, globular clusters 
C)  planetary nebulae, Population I stars, population II stars 
D)  Population I stars, population II stars, population III stars 
E)  globular clusters, open clusters, OB associations

Question 18

Based on his star counts, Herschel placed the Sun in the

Accepted Answer

The answer of Based on his star counts, Herschel placed...

Question 19

What do the orbits of Populations I and II stars tell us about the formation of the Milky Way?

Accepted Answer

Older halo stars of Population II move i

Question 20

The orbit of the Solar System around the Galaxy is similar to that of a planet, almost circular and in the galactic plane.

Accepted Answer

A) True 
 B)False

Sagittarius A* was first noted due to its strong emissions.

How did Herschel try to map our Galaxy 200 years ago, and why did he fail?

What observations suggest the mass of the Galaxy goes much farther out than its visible disc?

Virtually the entire disk of the Galaxy has been mapped using the wavelength.

Dark matter has not been observed at any electromagnetic wavelength.

If our Sun belonged to Population II, it is unlikely that planets could orbit it.

Because of their greater luminosity, RR Lyrae stars can be used at greater distances than can long- period Cepheids.

Contrast the observed visible mass of the Galaxy with its suspected total. Explain the difference.

The Milky Way is similar in many ways to M31, the Andromeda Galaxy.

Which is the correct description of the Sun's location within the Milky Way?

Most of the new star formation in the Galaxy is found in the

The spherical distribution of the globular clusters in the Halo reminds us of the similar distribution of cometary nuclei in the cloud.

It is the distribution of _ atoms in the spiral arms that is measured with 21- cm radio maps.

Our Sun lies about 30,000 light-years out from the Galactic Center.

The two stellar populations are extremes, but, in fact, stars with intermediate properties are common.

What is the mass of the black hole believed to be at the center of the Milky Way? How do we know?

Which sequence of formation is most likely to be correct, oldest to youngest?

Based on his star counts, Herschel placed the Sun in the

What do the orbits of Populations I and II stars tell us about the formation of the Milky Way?

The orbit of the Solar System around the Galaxy is similar to that of a planet, almost circular and in the galactic plane.

Charting the Heavens: the Foundations of Astronomy

The Copernican Revolution: the Birth of Modern Science

Light and Matter: the Inner Workings of the Cosmos

Telescopes: the Tools of Astronomy

The Solar System: Interplanetary Matter and the Birth of the Planets

Earth and Its Moon: Our Cosmic Backyard

The Terrestrial Planets: a Study in Contrasts

The Jovian Planets: Giants of the Solar System

Moons, Rings, and Plutoids: Small Worlds Among Giants

The Sun: Our Parent Star

Measuring the Stars: Giants, Dwarfs, and the Main Sequence

The Interstellar Medium: Star Formation in the Milky Way

Stellar Evolution: the Lives and Deaths of Stars

Neutron Stars and Black Holes: Strange States of Matter

Normal and Active Galaxies: Building Blocks of the Universe

Hubbles Law and Dark Matter: the Large-Scale Structure of the Cosmos

Cosmology: the Big Bang and the Fate of the Universe

Life in the Universe: Are We Alone

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Exam 15: The Milky Way Galaxy: a Spiral in Space

Sagittarius A* was first noted due to its strong emissions.

How did Herschel try to map our Galaxy 200 years ago, and why did he fail?

What observations suggest the mass of the Galaxy goes much farther out than its visible disc?

Virtually the entire disk of the Galaxy has been mapped using the wavelength.

Dark matter has not been observed at any electromagnetic wavelength.

If our Sun belonged to Population II, it is unlikely that planets could orbit it.

Because of their greater luminosity, RR Lyrae stars can be used at greater distances than can long- period Cepheids.

Contrast the observed visible mass of the Galaxy with its suspected total. Explain the difference.

The Milky Way is similar in many ways to M31, the Andromeda Galaxy.

Which is the correct description of the Sun's location within the Milky Way?

Most of the new star formation in the Galaxy is found in the

The spherical distribution of the globular clusters in the Halo reminds us of the similar distribution of cometary nuclei in the cloud.

It is the distribution of _ atoms in the spiral arms that is measured with 21- cm radio maps.

Our Sun lies about 30,000 light-years out from the Galactic Center.

The two stellar populations are extremes, but, in fact, stars with intermediate properties are common.

What is the mass of the black hole believed to be at the center of the Milky Way? How do we know?

Which sequence of formation is most likely to be correct, oldest to youngest?

Based on his star counts, Herschel placed the Sun in the

What do the orbits of Populations I and II stars tell us about the formation of the Milky Way?

The orbit of the Solar System around the Galaxy is similar to that of a planet, almost circular and in the galactic plane.

Charting the Heavens: the Foundations of Astronomy

The Copernican Revolution: the Birth of Modern Science

Light and Matter: the Inner Workings of the Cosmos

Telescopes: the Tools of Astronomy

The Solar System: Interplanetary Matter and the Birth of the Planets

Earth and Its Moon: Our Cosmic Backyard

The Terrestrial Planets: a Study in Contrasts

The Jovian Planets: Giants of the Solar System

Moons, Rings, and Plutoids: Small Worlds Among Giants

The Sun: Our Parent Star

Measuring the Stars: Giants, Dwarfs, and the Main Sequence

The Interstellar Medium: Star Formation in the Milky Way

Stellar Evolution: the Lives and Deaths of Stars

Neutron Stars and Black Holes: Strange States of Matter

Normal and Active Galaxies: Building Blocks of the Universe

Hubbles Law and Dark Matter: the Large-Scale Structure of the Cosmos

Cosmology: the Big Bang and the Fate of the Universe

Life in the Universe: Are We Alone

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