Question 1

The gravitational microlensing technique has detected ________ in our Galactic halo.

Accepted Answer

A) planets 
B) white dwarfs 
C) clouds of neutral hydrogen 
D) red giants 
E) no visible matter 
A) planets 
B) white dwarfs 
C) clouds of neutral hydrogen 
D) red giants 
E) no visible matter

Question 2

William Herschel's original model for our Galaxy was based on counting stars.

Accepted Answer

A) True 
 B)False

Question 3

Star formation ceased first in the:

Accepted Answer

A) Galactic nucleus. 
B) spiral arms. 
C) Galactic bulge. 
D) Galactic halo. 
E) Galactic disk. 
A) Galactic nucleus. 
B) spiral arms. 
C) Galactic bulge. 
D) Galactic halo. 
E) Galactic disk.

Question 4

The Milky Way is simply our edge-on view of our home Galaxy.

Accepted Answer

A) True 
 B)False

Question 5

The Earth lies close to the center of the Galaxy.

Accepted Answer

A) True 
 B)False

Question 6

Early in the 20th century, our Galaxy was estimated to be:

Accepted Answer

A) about 100,000 ly in diameter. 
B) about 35,000 ly (10 kpc)in diameter. 
C) about 10 million ly in diameter. 
D) not much larger than our solar system. 
E) about 2.5 million ly in diameter. 
A) about 100,000 ly in diameter. 
B) about 35,000 ly (10 kpc)in diameter. 
C) about 10 million ly in diameter. 
D) not much larger than our solar system. 
E) about 2.5 million ly in diameter.

Question 7

Both RR Lyrae and Cepheid variable stars are stars that, when on the main sequence, wereconsidered to be:

Accepted Answer

A) low mass. 
B) intermediate mass. 
C) high mass. 
D) zero-age main sequence. 
E) blue stragglers. 
A) low mass. 
B) intermediate mass. 
C) high mass. 
D) zero-age main sequence. 
E) blue stragglers.

Question 8

The location of the Galactic Center was first found by Harlow Shapley with:

Accepted Answer

A) radio emissions from Sagittarius A. 
B) Cepheids of Population I in the spiral arms. 
C) RR Lyrae variables in the globular clusters. 
D) planetary nebulae in the open clusters. 
E) infrared observations of the heat from its accretion disk around the black hole. 
A) radio emissions from Sagittarius A. 
B) Cepheids of Population I in the spiral arms. 
C) RR Lyrae variables in the globular clusters. 
D) planetary nebulae in the open clusters. 
E) infrared observations of the heat from its accretion disk around the black hole.

Question 9

The leading explanation for the existence of spiral arms is:

Accepted Answer

A) shock waves from cyclic supernovae explosions. 
B) shock waves from the quasar-like eruption of the Galactic core. 
C) passages of spiral density waves through the interstellar medium. 
D) passages of massive globular clusters through the Galactic plane. 
E) tidal streams of small galaxies being torn up by our monster Galaxy. 
A) shock waves from cyclic supernovae explosions. 
B) shock waves from the quasar-like eruption of the Galactic core. 
C) passages of spiral density waves through the interstellar medium. 
D) passages of massive globular clusters through the Galactic plane. 
E) tidal streams of small galaxies being torn up by our monster Galaxy.

Question 10

Henrietta Leavitt's period-luminosity relation for ________ indicates that longer periods meanmore luminosity.

Accepted Answer

The answer of Henrietta Leavitt's period-luminosity relation for ________ indicates...

The gravitational microlensing technique has detected ________ in our Galactic halo.

William Herschel's original model for our Galaxy was based on counting stars.

Star formation ceased first in the:

The Milky Way is simply our edge-on view of our home Galaxy.

The Earth lies close to the center of the Galaxy.

Early in the 20th century, our Galaxy was estimated to be:

Both RR Lyrae and Cepheid variable stars are stars that, when on the main sequence, wereconsidered to be:

The location of the Galactic Center was first found by Harlow Shapley with:

The leading explanation for the existence of spiral arms is:

Henrietta Leavitt's period-luminosity relation for ________ indicates that longer periods meanmore luminosity.

Charting the Heavens: The Foundations of Astronomy

The Copernican Revolution: The Birth of Modern Science

Radiation: Information From the Cosmos

Spectroscopy: the Inner Workings of Atoms

Telescopes: The Tools of Astronomy

The Solar System: Comparative Planetology and Formation Models

Earth: Our Home in Space

The Moon and Mercury: Scorched and Battered Worlds

Venus: Earths Sister Planet

Mars: a Near Miss for Life

Jupiter: Giant of the Solar System

Saturn: Spectacular Rings and Mysterious Moons

Uranus and Neptune: The Outer Worlds of the Solar System

Solar System Debris: Keys to Our Origin

Exoplanets: Planetary Systems Beyond Our Own

The Sun: Our Parent Star

The Stars: Giants, Dwarfs, and the Main Sequence

The Interstellar Medium: Gas and Dust Among the Stars

Star Formation: a Traumatic Birth

Stellar Evolution: The Life and Death of a Star

Stellar Explosions: Novae, Supernovae, and the Formation of the Elements

Neutron Stars and Black Holes: Strange States of Matter

Galaxies: Building Blocks of the Universe

Galaxies and Dark Matter: The Large-Scale Structure of the Cosmos

Cosmology: The Big Bang and the Fate of the Universe

The Early Universe: Toward the Beginning of Time

Life in the Universe: Are We Alone

Filters

Exam 23: The Milky Way Galaxy: a Spiral in Space

The gravitational microlensing technique has detected ________ in our Galactic halo.

William Herschel's original model for our Galaxy was based on counting stars.

Star formation ceased first in the:

The Milky Way is simply our edge-on view of our home Galaxy.

The Earth lies close to the center of the Galaxy.

Early in the 20th century, our Galaxy was estimated to be:

Both RR Lyrae and Cepheid variable stars are stars that, when on the main sequence, wereconsidered to be:

The location of the Galactic Center was first found by Harlow Shapley with:

The leading explanation for the existence of spiral arms is:

Henrietta Leavitt's period-luminosity relation for ________ indicates that longer periods meanmore luminosity.

Charting the Heavens: The Foundations of Astronomy

The Copernican Revolution: The Birth of Modern Science

Radiation: Information From the Cosmos

Spectroscopy: the Inner Workings of Atoms

Telescopes: The Tools of Astronomy

The Solar System: Comparative Planetology and Formation Models

Earth: Our Home in Space

The Moon and Mercury: Scorched and Battered Worlds

Venus: Earths Sister Planet

Mars: a Near Miss for Life

Jupiter: Giant of the Solar System

Saturn: Spectacular Rings and Mysterious Moons

Uranus and Neptune: The Outer Worlds of the Solar System

Solar System Debris: Keys to Our Origin

Exoplanets: Planetary Systems Beyond Our Own

The Sun: Our Parent Star

The Stars: Giants, Dwarfs, and the Main Sequence

The Interstellar Medium: Gas and Dust Among the Stars

Star Formation: a Traumatic Birth

Stellar Evolution: The Life and Death of a Star

Stellar Explosions: Novae, Supernovae, and the Formation of the Elements

Neutron Stars and Black Holes: Strange States of Matter

Galaxies: Building Blocks of the Universe

Galaxies and Dark Matter: The Large-Scale Structure of the Cosmos

Cosmology: The Big Bang and the Fate of the Universe

The Early Universe: Toward the Beginning of Time

Life in the Universe: Are We Alone

Filters