Where does CMBR originate?
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Q. Where does Cosmic Microwave Background Radiation originate?
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A. From the "Oort Soup" -- all sorts of planetesimals and planets in interstellar space, distant from stars.
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Q. When was this "Oort Soup" recognized?
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A. Fairly recently, though its effects on rotation of galaxies was known 80 years ago, when it was called "Dark Matter".
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Q. How is CMBR generated?
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A. It's just normal black-body radiation from matter at low temperatures, under 3 K.
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Q. Where can I find out more?
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Go to the Correct-Answer Home Page and List of Questions.