Question 1

Motions of objects near our Galaxy's core suggest the central black hole is about 3.7 billion solar masses.

Accepted Answer

A) True 
 B)False

Question 2

Which sequence of formation by age is correct,oldest to youngest?

Accepted Answer

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

Question 3

The spiral structure of the Milky Way is best revealed by ________ cm radio observations of HI regions.

Accepted Answer

The answer of The spiral structure of the Milky Way...

Question 4

Why is a variable star so convenient for measuring distances to very remote objects?

Accepted Answer

Certain types of variable stars,such as

Question 5

While yet unproven,the proposed WIMPS would be:

Accepted Answer

A)  massive like neutrons, but more elusive than neutrinos. 
B)  made of only strong magnetic fields. 
C)  rapidly decaying due to the weak nuclear force. 
D)  changing charges and polarities too rapidly to pin down. 
E)  the basic building blocks of neutrons and protons. 
A)  massive like neutrons, but more elusive than neutrinos. 
B)  made of only strong magnetic fields. 
C)  rapidly decaying due to the weak nuclear force. 
D)  changing charges and polarities too rapidly to pin down. 
E)  the basic building blocks of neutrons and protons.

Question 6

The part of the Milky Way we are most familiar with is the:

Accepted Answer

A)  Corona. 
B)  Galactic Disk. 
C)  Halo. 
D)  Galactic Bulge. 
E)  Galactic Center. 
A)  Corona. 
B)  Galactic Disk. 
C)  Halo. 
D)  Galactic Bulge. 
E)  Galactic Center.

Question 7

Which of these is NOT typical of the Galaxy's spiral arms?

Accepted Answer

A)  hot, young blue Population I stars 
B)  emission nebulae like M42 
C)  O and B stars 
D)  open clusters 
E)  Population II giants like orange Arcturus 
A)  hot, young blue Population I stars 
B)  emission nebulae like M42 
C)  O and B stars 
D)  open clusters 
E)  Population II giants like orange Arcturus

Question 8

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

Accepted Answer

Henrietta Leavitt discovered the period-

Question 9

Star formation ceased first in the:

Accepted Answer

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

Question 10

Population I stars came billions of years before Population II stars.

Accepted Answer

A) True 
 B)False

Question 11

What features of the telescopic view of the Andromeda Galaxy,M-31,are also visible to the naked eye for our similar Galaxy?

Accepted Answer

In Andromeda,we see a tilted disk of sta

Question 12

We can estimate the mass of the Galaxy from observations of its ________ curve.

Accepted Answer

The answer of We can estimate the mass of the...

Question 13

Why do we believe there is dark matter?

Accepted Answer

When we use the Keplerian equation to de

Question 14

The rotation curve for our Galaxy shows stars beyond the Sun moving slower than expected.

Accepted Answer

A) True 
 B)False

Question 15

The period-luminosity relation for Cepheid variables was discovered in 1908 by:

Accepted Answer

A)  William Herschel. 
B)  Henrietta Leavitt. 
C)  Harlow Shapley. 
D)  Heber Curtiss. 
E)  Edwin Hubble. 
A)  William Herschel. 
B)  Henrietta Leavitt. 
C)  Harlow Shapley. 
D)  Heber Curtiss. 
E)  Edwin Hubble.

Question 16

In the formation of our Galaxy,the ________ formed first.

Accepted Answer

A)  galactic disk 
B)  galactic center 
C)  globular clusters 
D)  planetary nebulae 
E)  spiral arms 
A)  galactic disk 
B)  galactic center 
C)  globular clusters 
D)  planetary nebulae 
E)  spiral arms

Question 17

The instability strip includes many main sequence stars.

Accepted Answer

A) True 
 B)False

Question 18

A star in the instability strip of the H-R diagram would:

Accepted Answer

A)  vary in both temperature and radius. 
B)  explode as a type I supernova. 
C)  vary in temperature and brightness, but not in radius. 
D)  vary in brightness with an irregular pattern. 
E)  vary in temperature and radius, but not in brightness. 
A)  vary in both temperature and radius. 
B)  explode as a type I supernova. 
C)  vary in temperature and brightness, but not in radius. 
D)  vary in brightness with an irregular pattern. 
E)  vary in temperature and radius, but not in brightness.

Question 19

Why were globular clusters so vital to Harlow Shapley's success?

Accepted Answer

Globular clusters lie in the H

Question 20

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

Accepted Answer

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

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

Motions of objects near our Galaxy's core suggest the central black hole is about 3.7 billion solar masses.

Which sequence of formation by age is correct,oldest to youngest?

The spiral structure of the Milky Way is best revealed by ________ cm radio observations of HI regions.

Why is a variable star so convenient for measuring distances to very remote objects?

While yet unproven,the proposed WIMPS would be:

The part of the Milky Way we are most familiar with is the:

Which of these is NOT typical of the Galaxy's spiral arms?

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

Star formation ceased first in the:

Population I stars came billions of years before Population II stars.

What features of the telescopic view of the Andromeda Galaxy,M-31,are also visible to the naked eye for our similar Galaxy?

We can estimate the mass of the Galaxy from observations of its ________ curve.

Why do we believe there is dark matter?

The rotation curve for our Galaxy shows stars beyond the Sun moving slower than expected.

The period-luminosity relation for Cepheid variables was discovered in 1908 by:

In the formation of our Galaxy,the ________ formed first.

The instability strip includes many main sequence stars.

A star in the instability strip of the H-R diagram would:

Why were globular clusters so vital to Harlow Shapley's success?

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

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: Earth's 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