When attempting to observe a protostar, which region of the spectrum do astronomers usually use?
A) visible, because protostars do emit visible light
B) infrared, because protostars emit only infrared light
C) infrared, because these longer wavelengths can penetrate the dust surrounding the protostar
D) ultraviolet, because their higher energy photons can penetrate the dust surrounding the protostar
Correct Answer:
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