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.

Question

Quizplus · Accepted Answer

Molecular clouds are often observed using radio telescopes to detect emissions from molecules like carbon monoxide (CO), which is abundant and emits strongly at radio wavelengths.

Molecular Clouds Can Be Observed