Question 1

Who developed the tuning-fork diagram connecting the different shapes of elliptical and spiral galaxies?

Accepted Answer

A)  Stephen Hawking 
B)  Ejnar Hertzsprung 
C)  Martin Schwarzschild 
D)  Edwin Hubble 
A)  Stephen Hawking 
B)  Ejnar Hertzsprung 
C)  Martin Schwarzschild 
D)  Edwin Hubble

Question 2

What is an elliptical galaxy?

Accepted Answer

A)  galaxy with an elliptical outline and a smooth distribution of brightness but no apparent structure 
B)  spiral galaxy seen from an angle, giving it an elliptical profile 
C)  galaxy with an elliptical halo when observed at radio wavelengths 
D)  spiral galaxy with an elliptically shaped nuclear bulge and the spiral arms starting from the ends of the ellipse 
A)  galaxy with an elliptical outline and a smooth distribution of brightness but no apparent structure 
B)  spiral galaxy seen from an angle, giving it an elliptical profile 
C)  galaxy with an elliptical halo when observed at radio wavelengths 
D)  spiral galaxy with an elliptically shaped nuclear bulge and the spiral arms starting from the ends of the ellipse

Question 3

Which of these terms does NOT name one of the four main categories of galaxies in the Hubble classification scheme?

Accepted Answer

A)  normal spirals 
B)  barred spirals 
C)  starbursts 
D)  ellipticals 
A)  normal spirals 
B)  barred spirals 
C)  starbursts 
D)  ellipticals

Question 4

What is the classification for a spiral galaxy with a moderately sized nuclear region and moderately wound arms?

Accepted Answer

A)  Sc 
B)  SBc 
C)  Sa 
D)  Sb 
A)  Sc 
B)  SBc 
C)  Sa 
D)  Sb

Question 5

What is the Hubble flow?

Accepted Answer

A)  Distant superclusters of galaxies are all moving toward Earth on one side and away from Earth on the other, as part of a universal flow of galaxies throughout the universe. 
B)  Distant superclusters of galaxies are all moving away from Earth at approximately the same speed. 
C)  Distant superclusters of galaxies are all moving away from Earth, their speed increasing with increasing distance. 
D)  Distant superclusters of galaxies are all moving away from Earth, their speed decreasing with increasing distance. 
A)  Distant superclusters of galaxies are all moving toward Earth on one side and away from Earth on the other, as part of a universal flow of galaxies throughout the universe. 
B)  Distant superclusters of galaxies are all moving away from Earth at approximately the same speed. 
C)  Distant superclusters of galaxies are all moving away from Earth, their speed increasing with increasing distance. 
D)  Distant superclusters of galaxies are all moving away from Earth, their speed decreasing with increasing distance.

Question 6

According to the Hubble classification scheme, an Sc galaxy has a(n)

Accepted Answer

A)  round or spherical appearance with a smooth light distribution. 
B)  large central bulge and tightly wound spiral arms. 
C)  irregular shape with no obvious disk or spiral arms. 
D)  small central bulge and loosely wound spiral arms. 
A)  round or spherical appearance with a smooth light distribution. 
B)  large central bulge and tightly wound spiral arms. 
C)  irregular shape with no obvious disk or spiral arms. 
D)  small central bulge and loosely wound spiral arms.

Question 7

A spiral galaxy has well-defined arms that are wound not-too-tightly around its intermediate-size bulge. This is MOST likely a

Accepted Answer

A)  flocculent Sa. 
B)  grand-design Sb. 
C)  flocculent Sb. 
D)  grand-design Sc. 
A)  flocculent Sa. 
B)  grand-design Sb. 
C)  flocculent Sb. 
D)  grand-design Sc.

Who developed the tuning-fork diagram connecting the different shapes of elliptical and spiral galaxies?

What is an elliptical galaxy?

Which of these terms does NOT name one of the four main categories of galaxies in the Hubble classification scheme?

What is the classification for a spiral galaxy with a moderately sized nuclear region and moderately wound arms?

What is the Hubble flow?

According to the Hubble classification scheme, an Sc galaxy has a(n)

A spiral galaxy has well-defined arms that are wound not-too-tightly around its intermediate-size bulge. This is MOST likely a

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Exam 17: Galaxies

Who developed the tuning-fork diagram connecting the different shapes of elliptical and spiral galaxies?

What is an elliptical galaxy?

Which of these terms does NOT name one of the four main categories of galaxies in the Hubble classification scheme?

What is the classification for a spiral galaxy with a moderately sized nuclear region and moderately wound arms?

What is the Hubble flow?

According to the Hubble classification scheme, an Sc galaxy has a(n)

A spiral galaxy has well-defined arms that are wound not-too-tightly around its intermediate-size bulge. This is MOST likely a

Discovering the Night Sky

Gravitation and the Motion of the Planets

Light and Telescopes

Atomic Physics and Spectra

Exoplanets and the Formation of Planetary Systems

Formation of the Solar System

Earth and the Moon

The Other Terrestrial Planets

The Outer Planets

Vagabonds of the Solar System

The Sun: Our Extraordinary Star

Characterizing Stars

The Lives of Stars From Birth Through Middle Age

The Death of Stars

Black Holes: Matters of Gravity

The Milky Way Galaxy

Quasars and Other Active Galaxies

Cosmology

Astrobiology

Filters