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Astronomy
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Phases of the Interstellar Medium
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Astronomy
AST.211 Phases of the Interstellar Medium
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A map of the Milky Way is made using only radio emission from the 21-cm line. What phase is the map designed to trace?
A
Neutral atomic hydrogen gas
B
Cold molecular gas in dark cores
C
Hot plasma in X-ray cavities
D
Warm ionized gas in H-alpha filaments
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