Exam 13: The Galaxies

The dark matter halo is estimated to extend out about 12 times farther from the galactic center than the solar system's position.How does this compare with the distance to the nearest large galaxy,the Andromeda (M31),which is 2.2 million light-years away?

(Multiple Choice)

4.8/5

(92)

Question 181

Where are bright,young O and B stars MOST likely to be found in the Milky Way Galaxy?

(Multiple Choice)

4.8/5

(70)

Question 182

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

(Multiple Choice)

4.9/5

(67)

Question 183

What is the Hubble flow?

(Multiple Choice)

4.7/5

(72)

Question 184

The Milky Way Galaxy appears to have a spiral structure with:

(Multiple Choice)

4.7/5

(87)

Question 185

How is cool,neutral hydrogen gas,H I,detected in the spiral arms of galaxies?

(Multiple Choice)

4.9/5

(86)

Question 186

What is the distribution of giant molecular clouds in the Milky Way Galaxy and other similar galaxies?

(Multiple Choice)

4.9/5

(80)

Question 187

The energy generation mechanism for active galaxies is believed to be:

(Multiple Choice)

4.9/5

(84)

Question 188

An astronomer studying a distant cluster of galaxies finds that several of the galaxies are spiral-shaped,with a small nuclear region and loosely wound arms.How should the astronomer classify these galaxies?

(Multiple Choice)

4.7/5

(91)

Question 189

Seyfert galaxies are:

(Multiple Choice)

4.9/5

(88)

Question 190

Quasars were originally thought to be stars in our Galaxy.However,all of their properties listed below were unusual for an ordinary star EXCEPT ONE.Which property was the exception?

(Multiple Choice)

4.9/5

(97)

Question 191

An astronomer studying a galaxy finds that its spectrum shows only old,low-mass,Population II stars,and photographs of the galaxy show little or no interstellar gas or dust.What kind of galaxy is this astronomer studying?

(Multiple Choice)

4.8/5

(78)

Question 192

In the 1970s,it was discovered that,among spiral galaxies,the wider the 21-cm radio emission line,the brighter the galaxy.What is the name of this relation?

(Multiple Choice)

4.9/5

(82)

Question 193

The time it takes for the Sun to orbit the galactic center once in its motion in the Milky Way is:

(Multiple Choice)

4.8/5

(87)

Question 194

Hubble carried out the determination of the distance to the Andromeda "nebula" (which finally resolved the Curtis-Shapley debate on the nature of "spiral nebulae")by observing:

(Multiple Choice)

4.7/5

(63)

Question 195

Astronomy with a radio telescope was initiated by:

(Multiple Choice)

4.9/5

(84)

Question 196

Which two parameters of star motion in the Milky Way are represented by its rotation curve?

(Multiple Choice)

4.8/5

(79)

Question 197

The observed characteristics of a quasar are:

(Multiple Choice)

4.8/5

(84)

Question 198

The Milky Way Galaxy is a(n):

(Multiple Choice)

4.9/5

(75)

Question 199

An active galaxy is measured to be 100 Mpc away.How many million years ago did the light we see now leave this galaxy?

(Multiple Choice)

4.8/5

(86)

Question 200

Showing 181 - 200 of 465

The dark matter halo is estimated to extend out about 12 times farther from the galactic center than the solar system's position.How does this compare with the distance to the nearest large galaxy,the Andromeda (M31),which is 2.2 million light-years away?

Where are bright,young O and B stars MOST likely to be found in the Milky Way Galaxy?

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

What is the Hubble flow?

The Milky Way Galaxy appears to have a spiral structure with:

How is cool,neutral hydrogen gas,H I,detected in the spiral arms of galaxies?

What is the distribution of giant molecular clouds in the Milky Way Galaxy and other similar galaxies?

The energy generation mechanism for active galaxies is believed to be:

An astronomer studying a distant cluster of galaxies finds that several of the galaxies are spiral-shaped,with a small nuclear region and loosely wound arms.How should the astronomer classify these galaxies?

Seyfert galaxies are:

Quasars were originally thought to be stars in our Galaxy.However,all of their properties listed below were unusual for an ordinary star EXCEPT ONE.Which property was the exception?

An astronomer studying a galaxy finds that its spectrum shows only old,low-mass,Population II stars,and photographs of the galaxy show little or no interstellar gas or dust.What kind of galaxy is this astronomer studying?

In the 1970s,it was discovered that,among spiral galaxies,the wider the 21-cm radio emission line,the brighter the galaxy.What is the name of this relation?

The time it takes for the Sun to orbit the galactic center once in its motion in the Milky Way is:

Hubble carried out the determination of the distance to the Andromeda "nebula" (which finally resolved the Curtis-Shapley debate on the nature of "spiral nebulae")by observing:

Astronomy with a radio telescope was initiated by:

Which two parameters of star motion in the Milky Way are represented by its rotation curve?

The observed characteristics of a quasar are:

The Milky Way Galaxy is a(n):

An active galaxy is measured to be 100 Mpc away.How many million years ago did the light we see now leave this galaxy?

Discovering the Night Sky

Gravitation and the Waltz of the Planets

Light and Telescopes

Formation of the Solar System and Other Planetary Systems

Exoplanets

The Terrestrial Planets and Their Moons

The Outer Planets and Their Moons

Vagabonds of the Solar System

The Sun: Our Extraordinary Ordinary Star

Characterizing Stars

The Lives of the Stars From Birth Through Middle Age

The Deaths and Remnants of Stars

Cosmology

Astrobiology

Filters