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Author Question: What does the equivalent of an H-R diagram for galaxies, plotting luminosity versus color, show? ... (Read 66 times)

genevieve1028

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on: Jul 27, 2018
What does the equivalent of an H-R diagram for galaxies, plotting luminosity versus color, show?
 
  A) galaxies fill the diagram showing that there is no correlation between luminosity and color
  B) two clumps, one blue with relatively low luminosity, one red with relatively high luminosity, and a valley in between with few galaxies
  C) a continuum from faint, blue galaxies to bright, red galaxies
  D) a continuum from faint, red galaxies to bright, blue galaxies
  E) a main sequence, just as for stars

Question 2

The spiral structure of the Milky Way is best revealed by ________ cm radio observations of hydrogen atoms.
 
  Fill in the blank(s) with correct word


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akudia

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

B

Answer to Question 2

21


genevieve1028

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Reply #2 on: Jul 27, 2018
Thank you!


akudia

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Reply #3 on: Jul 27, 2018
Always glad to help...


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