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jtfortwengler jtfortwengler
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A month ago

The formation of one of the following phenomena requires that a young hot star (T = 25,000 K) be relatively close by. Which one?



emission nebulae



HI regions



molecular clouds



21-centimetre radiation

Textbook 
ASTRO

ASTRO


Edition: 3rd
Authors:
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diana72gdiana72g
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A month ago
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Thanks
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Just got PERFECT on my quiz
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