Multiple Choice
How can molecular clouds be observed?
A) by using infrared telescopes to detect ionized gas in the clouds
B) by using X-ray telescopes to observe the X-ray radiation from the molecules in the cloud
C) by using radio telescopes to observe the emission from CO molecules in the clouds
D) by using radio telescopes to observe the 21-cm radiation from hydrogen
Correct Answer:
Verified
Correct Answer:
Verified
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