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Author Question: How is the age of the galaxy determined? a. measuring the metallicity of Population II stars b. ... (Read 68 times)

Shelles

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on: Jul 27, 2018
How is the age of the galaxy determined?
 
  a. measuring the metallicity of Population II stars
  b. finding the turnoff point in the H-R diagram of globular clusters
  c. from the motion of stars in the galactic halo
  d. counting the number of open clusters in the spiral arms

Question 2

The free-fall contraction of a molecular cloud
 
  a. can be initiated by shock waves from supernovae.
  b. can be initiated by nearby spectral type G stars.
  c. can be initiated by the rotation of the cloud.
  d. causes the cloud to become transparent to ultraviolet radiation.
  e. causes the particles in the cloud to decrease the speed with which they move.


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Pswine

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Reply #1 on: Jul 27, 2018
Answer to Question 1

b

Answer to Question 2

a


Shelles

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Reply 2 on: Jul 27, 2018
Excellent

ebonylittles

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Reply 3 on: Yesterday
Gracias!

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