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The cosmic microwave background is from the Big Bang.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
4 sources for · 2 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that the cosmic microwave background is from the Big Bang?

Yes. Reference sources (Wikipedia, ESA, Wikibooks) state the cosmic microwave background is relic radiation released shortly after the Big Bang and is key evidence for it. One physics Q&A notes it originates ~380,000 years after the Big Bang rather than at the event itself, and a fringe paper offers a non-Big-Bang interpretation.

Verdict: SUPPORTED · 4 sources for, 2 against · Last checked

Evidence for · 4
Cosmic microwave background - Wikipedia
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Cosmic microwave background - Wikipedia. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Cosmic_microwave_background

Evidence against · 2
Why can we see the cosmic microwave background (CMB)?
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Why can we see the cosmic microwave background (CMB)?. (n.d.). physics.stackexchange.com. https://physics.stackexchange.com/questions/25070

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More for · 3
ESA - Cosmic Microwave Background (CMB) radiation
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ESA - Cosmic Microwave Background (CMB) radiation. (n.d.). esa.int. https://www.esa.int/Science_Exploration/Space_Science/Cosmic_Microwave_Background_CMB_radiation

Microwave surfing - which came first: big bang or big crunch?
2001
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Microwave surfing - which came first: big bang or big crunch?. (2001). doi.org. https://doi.org/10.1109/mmw.2001.924917

Wikibooks: A-level Physics (Advancing Physics)/Big Bang Theory
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Wikibooks: A-level Physics (Advancing Physics)/Big Bang Theory. (n.d.). en.wikibooks.org. https://en.wikibooks.org/wiki/A-level_Physics_(Advancing_Physics)/Big_Bang_Theory

More against · 1
Hubble’s Law and the Cosmic Microwave Background in the Absence of the Big Bang
2021
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Hubble’s Law and the Cosmic Microwave Background in the Absence of the Big Bang. (2021). hal.science. https://doi.org/10.9734/bpi/rtcps/v4/13528D

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