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Home Q & A Board Science-Related Homework Help Physics
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Tsync Tsync
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8 years ago
Why is 21-cm radiation so important to the study of interstellar matter and the Galaxy?
A) It is emitted by most stars, enabling astronomers to map the entire Galaxy.
B) It is emitted only in hot regions of star formation, so the pattern of the spiral arms of the Galaxy can be mapped.
C) Emitted by hydrogen, it passes through interstellar dust and lets us to map the entire Galaxy.
D) Emitted by carbon monoxide, it passes through interstellar gas and lets us to see places rich in organic molecules around the Galaxy.
E) It helps locate the galactic core in Sagittarius.
Textbook 
Astronomy Today

Astronomy Today


Edition: 8th
Authors:
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Minoring in physics
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RatatouilleRatatouille
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8 years ago
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Tsync Author
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8 years ago
Wonderful, thanks for your time and effort
Minoring in physics
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#3
8 years ago
Slight Smile
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