Question 1

Why do some radio galaxies appear to have lobes while some do not?

Accepted Answer

It's believed that all radio g

Question 2

You observe a spiral galaxy with a large central bulge and tightly wrapped arms. It would beclassified an:

Accepted Answer

A) Sc. 
B) Sb. 
C) Sa. 
D) SO. 
E) E7. 
A) Sc. 
B) Sb. 
C) Sa. 
D) SO. 
E) E7.

Question 3

Distinguish an E0 from an E7 galaxy.

Accepted Answer

Elliptical galaxies of type E0 show sphe

Question 4

What type of galaxy are the two Magellanic Clouds? How do we know this visually?

Accepted Answer

Both are irregular galaxies, w

Question 5

Why do astronomers speak in terms of redshifts rather than distances to faraway objects?

Accepted Answer

Distance is an uncertain quantity:do you

Question 6

In active galaxies, their central engines may be temporarily fed by:

Accepted Answer

A) a sudden surge of star formation. 
B) a series of supernovae around the core. 
C) the sudden collapse of the core into a supermassive black hole. 
D) a close encounter with a neighbor galaxy. 
E) the fusion of helium into carbon in their cores. 
A) a sudden surge of star formation. 
B) a series of supernovae around the core. 
C) the sudden collapse of the core into a supermassive black hole. 
D) a close encounter with a neighbor galaxy. 
E) the fusion of helium into carbon in their cores.

Question 7

How does the modern value of Hubble's constant compare to Hubble's original publishedvalue?

Accepted Answer

A) They are very similar. 
B) The modern value is about 7 times lower than the original value. 
C) The modern value is about 7 times higher than the original value. 
D) The modern value is about 700 times lower than the original value. 
E) The modern value is about 700 times higher than the original value. 
A) They are very similar. 
B) The modern value is about 7 times lower than the original value. 
C) The modern value is about 7 times higher than the original value. 
D) The modern value is about 700 times lower than the original value. 
E) The modern value is about 700 times higher than the original value.

Why do some radio galaxies appear to have lobes while some do not?

You observe a spiral galaxy with a large central bulge and tightly wrapped arms. It would beclassified an:

Distinguish an E0 from an E7 galaxy.

What type of galaxy are the two Magellanic Clouds? How do we know this visually?

Why do astronomers speak in terms of redshifts rather than distances to faraway objects?

In active galaxies, their central engines may be temporarily fed by:

How does the modern value of Hubble's constant compare to Hubble's original publishedvalue?

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

The Milky Way Galaxy: a Spiral in Space

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

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Exam 24: Galaxies: Building Blocks of the Universe

Why do some radio galaxies appear to have lobes while some do not?

You observe a spiral galaxy with a large central bulge and tightly wrapped arms. It would beclassified an:

Distinguish an E0 from an E7 galaxy.

What type of galaxy are the two Magellanic Clouds? How do we know this visually?

Why do astronomers speak in terms of redshifts rather than distances to faraway objects?

In active galaxies, their central engines may be temporarily fed by:

How does the modern value of Hubble's constant compare to Hubble's original publishedvalue?

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

The Milky Way Galaxy: a Spiral in Space

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