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doit_the_clown doit_the_clown
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7 years ago
What is the cosmic microwave background radiation?
A)   A uniform background of radiation from electrons spiraling in weak intergalactic magnetic fields
B)   Radiation left over from the Big Bang after the universe expanded and cooled
C)   An almost-uniform background of radiation from distant, unresolved, overlapping galaxies
D)   Radiation from a very tenuous, ionized gas that fills the universe equally in all directions
Textbook 
Discovering the Universe

Discovering the Universe


Edition: 7th
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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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discovererdiscoverer
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7 years ago
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doit_the_clown Author
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7 years ago
Brilliant ツ
njn;l
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Yesterday
Thank you, thank you, thank you!
dri
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2 hours ago
Helped a lot
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