Question 211 pts The presence of giant elliptical galaxies at the centers of ric

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Question 211 pts

The presence of giant elliptical galaxies at the centers of rich clusters of galaxies lends evidence to the theory that  

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Question 221 pts

How do astronomers explain the existence of spiral structures in many galaxies?

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Question 231 pts

Which of the following is an example of an Sc galaxy?

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Question 241 pts

Which of the following facts is true about the luminosity of the objects in the sky?

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Question 251 pts

Which mass stars take about 160,000 years to become full-fledged Main Sequence stars?

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Question 261 pts

Sunspots are regions of  

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Question 271 pts

Which range of mass does a star have to be in order to yield a Type-2 Supernova explosion?  

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Question 281 pts

Which of the following is TRUE about the content and characteristics of galaxies?

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Question 291 pts

What is the method by which the rate of rotation of a galaxy is calculated?  

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Question 301 pts

Star A is 5,000 times as Luminous as the sun and 60 LY away from us. Star B is 20,000 times as Luminous as the sun and 130 LY away from us. Which one will appear brighter for us?

Explanation / Answer

Question 211 pts-

Elliptical galaxies can form by the merging of two or more spiral galaxies.

Question 231-

M31,M81.

Quwstion 261-

Cooler gas and strong magnetic field

Question 271-

Greater than 8 times, the mass of the sun.

Question 281-

Spiral galaxies contains lots of gas and dust to create new starts.

Question 291-

Dropler effect applied to spectra taken if opposite side of the galaxy.

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