Molecular Clouds Can Be Observed

question 13

Multiple Choice

Molecular clouds can be observed

• A) using infrared telescopes to detect ionized gas in the clouds.
• B) using x-ray telescope to observe the x-ray radiation from the molecules in the cloud.
• C) using radio telescopes to observe the CO emission from the clouds.
• D) by looking for blue wispy regions near star clusters.
• E) by looking for the 21-cm radiation from hydrogen.

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