Which radiation is the most useful to map the structure of our Galaxy?
A) far ultraviolet
B) 21-cm radio radiation
C) X-rays
D) gamma rays

Name: Which radiation is the most useful to map the structure of our Galaxy? A) far ultraviolet B) 21-cm radio radiation C) X-rays D) gamma rays
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Question

Quizplus · Accepted Answer

21-cm radio radiation is emitted by neutral hydrogen, which is abundant in the Galaxy, allowing astronomers to map its structure effectively.

Which Radiation Is the Most Useful to Map the Structure