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Author Question: Only type O stars are hot enough to show ionized ________ in their spectra. Fill in the blank(s) ... (Read 78 times)

colton

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on: Jul 27, 2018
Only type O stars are hot enough to show ionized ________ in their spectra.
 
  Fill in the blank(s) with correct word

Question 2

For finding the distances to globular clusters, Harlow Shapley used
 
  A) RR Lyrae variables.
  B) planetary nebulae.
  C) eclipsing binaries.
  D) Population I classical Cepheids.
  E) Type I supernovae.


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mceravolo

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

helium

Answer to Question 2

A


colton

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Reply 2 on: Jul 27, 2018
Excellent

bigcheese9

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Reply 3 on: Yesterday
Wow, this really help

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