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Author Question: Astronomers before Shapely underestimated the size of the Milky Way galaxy because they lacked ... (Read 77 times)

sarasara

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on: Jul 27, 2018
Astronomers before Shapely underestimated the size of the Milky Way galaxy because they lacked telescopes.
 
  a. True
  b. False
  Indicate whether the statement is true or false

Question 2

You would use the 21-cm radio emission line to map out ____________.
 
  a. the interstellar medium b. molecular clouds
  c. atomic hydrogen clouds d. All of the other choices are correct.


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Kimmy

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

False

Answer to Question 2

c


sarasara

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Reply 2 on: Jul 27, 2018
:D TYSM

isabelt_18

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Reply 3 on: Yesterday
Wow, this really help

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