Question 1

Edwin Hubble first found the distance to M31 in Andromeda with its variable stars in its spiral arms.

Accepted Answer

The answer of Edwin Hubble first found the distance to...

Question 2

RR Lyrae stars pulsate, but with shorter periods and lower luminosities than Cepheids.

Accepted Answer

A) True 
 B)False

Question 3

Which of the following are most massive and luminous?

Accepted Answer

A)  RR Lyrae variables 
B)  Cepheid variables 
C)  T- Tauri variables 
D)  white dwarfs 
E)  brown dwarfs 
A)  RR Lyrae variables 
B)  Cepheid variables 
C)  T- Tauri variables 
D)  white dwarfs 
E)  brown dwarfs

Question 4

The age of the whole Galaxy has been found from studies of its oldest stars in the clusters that orbit in the Halo.

Accepted Answer

The answer of The age of the whole Galaxy has...

Question 5

For finding the distances to globular clusters, Harlow Shapley used

Accepted Answer

A)  planetary nebulae. 
B)  RR Lyrae variables. 
C)  eclipsing binaries. 
D)  Type I supernovae. 
E)  Population I classical Cepheids. 
A)  planetary nebulae. 
B)  RR Lyrae variables. 
C)  eclipsing binaries. 
D)  Type I supernovae. 
E)  Population I classical Cepheids.

Question 6

Most of the mass of our Galaxy lies

Accepted Answer

A)  outside the luminous part of the Milky Way Galaxy. 
B)  at the galactic center. 
C)  between Earth and the Galactic center. 
D)  in the bright spiral arms. 
E)  within the bulge. 
A)  outside the luminous part of the Milky Way Galaxy. 
B)  at the galactic center. 
C)  between Earth and the Galactic center. 
D)  in the bright spiral arms. 
E)  within the bulge.

Question 7

The center of the Milky Way lies in the direction of the constellation

Accepted Answer

A)  Virgo. 
B)  Orion. 
C)  Sagittarius. 
D)  Cygnus. 
E)  Andromeda. 
A)  Virgo. 
B)  Orion. 
C)  Sagittarius. 
D)  Cygnus. 
E)  Andromeda.

Question 8

The majority of the mass of the Milky Way lies farther out than the Sun's orbit.

Accepted Answer

A) True 
 B)False

Question 9

Halo stars are all Population II objects.

Accepted Answer

A) True 
 B)False

Question 10

William Herschel's attempt to map our Galaxy was based on in different directions in space.

Accepted Answer

The answer of William Herschel's attempt to map our Galaxy...

Question 11

From the Sun, the distance to the Galactic Center is about

Accepted Answer

A)  225 million light-years. 
B)  100,000 light-years. 
C)  8 kpc. 
D)  100 billion parsecs. 
E)  8,000 light-years. 
A)  225 million light-years. 
B)  100,000 light-years. 
C)  8 kpc. 
D)  100 billion parsecs. 
E)  8,000 light-years.

Question 12

Star have been vital in understanding stellar evolution, finding distances, and mapping the structure of our Galaxy.

Accepted Answer

The answer of Star have been vital in understanding stellar...

Question 13

The problem with visual observations of our Galaxy is the luminous gas haze.

Accepted Answer

A) True 
 B)False

Question 14

Who discovered the period- luminosity relationship, and why was it so critical?

Accepted Answer

Henrietta Leavitt discovered the period-

Question 15

The radio source is located in a place consistent with the center of our Galaxy.

Accepted Answer

A)  3C 273 
B)  M8, the Lagoon Nebula 
C)  47 Tucanae 
D)  Sgr A* 
E)  Cygnus X- 1 
A)  3C 273 
B)  M8, the Lagoon Nebula 
C)  47 Tucanae 
D)  Sgr A* 
E)  Cygnus X- 1

Question 16

The first attempt to map the Galaxy via star counts was done by

Accepted Answer

A)  Edwin Hubble with the new 100" Mt. Wilson telescope in the 1930s. 
B)  Harlow Shapley with the RR Lyrae variables in 1920. 
C)  William Herschel in the late eighteenth century. 
D)  Edward Barnard with long exposure photos about 1900. 
E)  Galileo in 1612. 
A)  Edwin Hubble with the new 100" Mt. Wilson telescope in the 1930s. 
B)  Harlow Shapley with the RR Lyrae variables in 1920. 
C)  William Herschel in the late eighteenth century. 
D)  Edward Barnard with long exposure photos about 1900. 
E)  Galileo in 1612.

Question 17

Between us and the Galactic Center, the Milky Way has a mass of

Accepted Answer

A)  several hundred thousand Suns. 
B)  one to two million Suns. 
C)  250 million Suns. 
D)  100 billion Suns. 
E)  over a trillion Suns. 
A)  several hundred thousand Suns. 
B)  one to two million Suns. 
C)  250 million Suns. 
D)  100 billion Suns. 
E)  over a trillion Suns.

Question 18

The orbits of Population II stars have been compared to

Accepted Answer

A)  planets around the Sun. 
B)  comets around the Sun. 
C)  satellites around planets. 
D)  binary stars. 
E)  the accretion disc around a black hole. 
A)  planets around the Sun. 
B)  comets around the Sun. 
C)  satellites around planets. 
D)  binary stars. 
E)  the accretion disc around a black hole.

Question 19

The longer the period of pulsation for a Cepheid, the more massive and luminous the variable giant star is.

Accepted Answer

A) True 
 B)False

Question 20

Describe the cycle of life and death we observe in the spiral arms.

Accepted Answer

As the spiral- density wave moves throug

Edwin Hubble first found the distance to M31 in Andromeda with its variable stars in its spiral arms.

RR Lyrae stars pulsate, but with shorter periods and lower luminosities than Cepheids.

Which of the following are most massive and luminous?

The age of the whole Galaxy has been found from studies of its oldest stars in the clusters that orbit in the Halo.

For finding the distances to globular clusters, Harlow Shapley used

Most of the mass of our Galaxy lies

The center of the Milky Way lies in the direction of the constellation

The majority of the mass of the Milky Way lies farther out than the Sun's orbit.

Halo stars are all Population II objects.

William Herschel's attempt to map our Galaxy was based on in different directions in space.

From the Sun, the distance to the Galactic Center is about

Star have been vital in understanding stellar evolution, finding distances, and mapping the structure of our Galaxy.

The problem with visual observations of our Galaxy is the luminous gas haze.

Who discovered the period- luminosity relationship, and why was it so critical?

The radio source is located in a place consistent with the center of our Galaxy.

The first attempt to map the Galaxy via star counts was done by

Between us and the Galactic Center, the Milky Way has a mass of

The orbits of Population II stars have been compared to

The longer the period of pulsation for a Cepheid, the more massive and luminous the variable giant star is.

Describe the cycle of life and death we observe in the spiral arms.

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

Edwin Hubble first found the distance to M31 in Andromeda with its variable stars in its spiral arms.

RR Lyrae stars pulsate, but with shorter periods and lower luminosities than Cepheids.

Which of the following are most massive and luminous?

The age of the whole Galaxy has been found from studies of its oldest stars in the clusters that orbit in the Halo.

For finding the distances to globular clusters, Harlow Shapley used

Most of the mass of our Galaxy lies

The center of the Milky Way lies in the direction of the constellation

The majority of the mass of the Milky Way lies farther out than the Sun's orbit.

Halo stars are all Population II objects.

William Herschel's attempt to map our Galaxy was based on in different directions in space.

From the Sun, the distance to the Galactic Center is about

Star have been vital in understanding stellar evolution, finding distances, and mapping the structure of our Galaxy.

The problem with visual observations of our Galaxy is the luminous gas haze.

Who discovered the period- luminosity relationship, and why was it so critical?

The radio source is located in a place consistent with the center of our Galaxy.

The first attempt to map the Galaxy via star counts was done by

Between us and the Galactic Center, the Milky Way has a mass of

The orbits of Population II stars have been compared to

The longer the period of pulsation for a Cepheid, the more massive and luminous the variable giant star is.

Describe the cycle of life and death we observe in the spiral arms.

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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