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Home Q & A Board Science-Related Homework Help Physics
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staedtler staedtler
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7 years ago
What is an emission nebula (H II region)?  See Figure 12-5 in Comins and Kaufmann, Discovering the Universe, 7th Ed.
A)   A region of ionized hydrogen around one or more hot O- and B-type stars
B)   A region of molecular hydrogen inside a giant molecular cloud
C)   A region of neutral, atomic hydrogen in interstellar space
D)   A region of gas and dust formed by the explosion of a massive star
Textbook 
Discovering the Universe

Discovering the Universe


Edition: 7th
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discovererdiscoverer
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7 years ago
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staedtler Author
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7 years ago
Grinning Face Exactly what I needed
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