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Author Question: Why are Cepheid variable stars important in our study of the Milky Way galaxy? What will be an ... (Read 93 times)

jake

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on: Jul 27, 2018
Why are Cepheid variable stars important in our study of the Milky Way galaxy?
 
  What will be an ideal response?

Question 2

The pressure of an interstellar gas cloud depends on the cloud's ___________________ _ and ___________________ _.
 
  Fill in the blank(s) with correct word


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millet

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

They can be used to calibrate the period-luminosity relation, which is used to determine distances to stars.

Answer to Question 2

temperature, density
density, temperature


jake

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Reply 2 on: Jul 27, 2018
Excellent

yeungji

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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