Shared Flashcard Set

Details

Physics 1446 Final
Review for final exam
16
Astronomy
Undergraduate 1
08/12/2010

Additional Astronomy Flashcards

 


 

Cards

Term
What are three specific types of galaxies?
Definition
Spiral, Elliptical, and Irregular
Term
What is the diameter of our galaxy?
Definition
100,000 Light Years
Term
What is the width of our galaxy?
Definition
2,000 light years
Term
What component of material of the Milky Way Galaxy prevents us from photographing the galactic center at optical wavelengths?
Definition
Interstellar Dust
Term
The Milky Way in which the Sun resides is an example of which type of galaxy?
Definition
A spiral galaxy
Term
The distance of the Slar System from the center of our galaxy is about...
Definition
26,000 Light Years
Term
What type of spectra (or light) allows us to decipher our galaxy type?
Definition
21-cm radio emission
Term
Where is the solar system located in our galaxy?
Definition
In the galactic disk
Term
In which constellation is the center of our galaxy located in?
Definition
Sagittarius
Term
The center of our Milky Way Galaxy can be best observed with which electromagnetic wavelengths?
Definition
Radio Light
Term
What is the most common chemical element in the galaxies?
Definition
Hydrogen
Term
Which set of laws is violated by the motion of the stars in the disk of spiral galaxy?
Definition
Kepler's Laws
Term
What is the estimated mass of the black hole in the center of our galaxy?
Definition
4 million solar masses
Term
What is the estimated number of stars in our galaxy?
Definition
200 billion
Term
Approximately how long does it take the Sun to orbit the Milky Way Galaxy?
Definition
10^15 solar masses
Term
What objects outline the spirals of a spiral galaxy?
Definition
OB associations, H II Regions, and Giant molecular clouds
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