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2026
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Source-derived question
What is the cosmic microwave background, and when was it formed?
Big Bang Theory
Cosmic Microwave Background
Sources that address it
WMAP first-year results establish age and composition of the universe
almanac
Related questions
How cold is the afterglow of the Big Bang today, and why has it cooled so much?
How does a uniform 2.7 Kelvin glow across the whole sky count as evidence for the Big Bang?
How old is the cosmic microwave background radiation, and what does it reveal about the early universe?
How was Robert Dicke's team at Princeton already prepared to explain the exact signal Penzias and Wilson had found?
What did COBE's measurements of the cosmic microwave background confirm about the Big Bang?
What did Gamow, Alpher, and Herman predict in 1948 about radiation left over from the early universe?
What temperature did Alpher and Herman predict for the universe's leftover radiation, and when was it confirmed?
How did Edwin Hubble use Leavitt's relation to prove the Andromeda nebula lay outside the Milky Way?