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doit_the_clown doit_the_clown
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7 years ago
The source of the radio radiation from the outer lobes of active galaxies is

(a)   synchrotron radiation.
(b)   the 21-cm hydrogen emission line.
(c)   hot, ionized gas emitting thermal radiation.
Textbook 
Discovering the Universe

Discovering the Universe


Edition: 7th
Authors:
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Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.

Albert Einstein
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hyponoticahyponotica
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7 years ago
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