Question 1

To an astronomer,what is a "standard candle"?

Accepted Answer

A)  A standard light source that can be placed in a telescope,to which the brightness of stars and other objects can be compared 
B)  Any type of object whose absolute magnitude is known 
C)  Any galaxy whose redshift has been measured accurately 
D)  An accurately defined brightness scale for stars and galaxies,such as the magnitude scale 
A)  A standard light source that can be placed in a telescope,to which the brightness of stars and other objects can be compared 
B)  Any type of object whose absolute magnitude is known 
C)  Any galaxy whose redshift has been measured accurately 
D)  An accurately defined brightness scale for stars and galaxies,such as the magnitude scale

Question 2

Visible light passes more easily though dust and gas than infrared light in our Galaxy,revealing structures.

Accepted Answer

A) True 
 B)False

Question 3

The possible presence of a supermassive black hole at the center of our Galaxy has been deduced from

Accepted Answer

A)  powerful magnetic fields in the huge filaments arching away from (or toward)the center. 
B)  the number of globular clusters that are concentrated near the galactic center. 
C)  gravitational radiation being emitted from stars as they are swallowed by the black hole. 
D)  the very high orbital speed of stars close to the galactic center. 
A)  powerful magnetic fields in the huge filaments arching away from (or toward)the center. 
B)  the number of globular clusters that are concentrated near the galactic center. 
C)  gravitational radiation being emitted from stars as they are swallowed by the black hole. 
D)  the very high orbital speed of stars close to the galactic center.

Question 4

If you were able to view the entire Milky Way Galaxy through a filter,which passed only near-infrared wavelengths,what would you see?

Accepted Answer

A)  Billions of points of light representing the near-infrared emissions of the stars 
B)  Relatively few points of light representing the near-infrared emission of newly formed stars 
C)  A bright glow from the dust in the plane of the Galaxy 
D)  Almost nothing,because the Galaxy emits almost no near-infrared radiation 
A)  Billions of points of light representing the near-infrared emissions of the stars 
B)  Relatively few points of light representing the near-infrared emission of newly formed stars 
C)  A bright glow from the dust in the plane of the Galaxy 
D)  Almost nothing,because the Galaxy emits almost no near-infrared radiation

Question 5

Because of the severe interstellar dust interference blocking visual wavelengths,most of our information about the galactic center comes form infrared and radio observations.

Accepted Answer

A) True 
 B)False

To an astronomer,what is a "standard candle"?

Visible light passes more easily though dust and gas than infrared light in our Galaxy,revealing structures.

The possible presence of a supermassive black hole at the center of our Galaxy has been deduced from

If you were able to view the entire Milky Way Galaxy through a filter,which passed only near-infrared wavelengths,what would you see?

Because of the severe interstellar dust interference blocking visual wavelengths,most of our information about the galactic center comes form infrared and radio observations.

Predicting the Motions of the Stars, Sun, and Moon

Decoding the Hidden Messages in Starlight

Analyzing Scales and Motions of the Universe

Exploring Our Evolving Solar System

Uncovering Earths Systems

Exploring Terrestrial Surface Processes and Atmospheres

Observing the Dynamic Giant Planets

Looking for Life Beyond Earth

Probing the Dynamic Sun

Observing Properties of Distant Stars

Inferring Patterns in Star Life Cycles

Predicting the Violent End of the Largest Stars

Investigating Other Galaxies

Observing the Evolution of the Universe

Filters

Exam 13: Exploring Our Galaxy

To an astronomer,what is a "standard candle"?

Visible light passes more easily though dust and gas than infrared light in our Galaxy,revealing structures.

The possible presence of a supermassive black hole at the center of our Galaxy has been deduced from

If you were able to view the entire Milky Way Galaxy through a filter,which passed only near-infrared wavelengths,what would you see?

Because of the severe interstellar dust interference blocking visual wavelengths,most of our information about the galactic center comes form infrared and radio observations.

Predicting the Motions of the Stars, Sun, and Moon

Decoding the Hidden Messages in Starlight

Analyzing Scales and Motions of the Universe

Exploring Our Evolving Solar System

Uncovering Earths Systems

Exploring Terrestrial Surface Processes and Atmospheres

Observing the Dynamic Giant Planets

Looking for Life Beyond Earth

Probing the Dynamic Sun

Observing Properties of Distant Stars

Inferring Patterns in Star Life Cycles

Predicting the Violent End of the Largest Stars

Investigating Other Galaxies

Observing the Evolution of the Universe

Filters