What is the cosmic microwave background?
A) radio noise from Seyfert galaxies
B) radiation from hot gas in intergalactic space
C) radiation from the first stars formed when the Universe was young
D) radiation released when neutral atoms formed in the young Universe
Correct Answer:
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Q28: What is the cosmic horizon?
A) the place
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A)
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Q36: When the Universe was young, it was...
A)
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