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MCQBeginnerCosmology & Universe
USAAAO — 2026 First Round
Question 18
The most distant known galaxy, MoM-z14, was recently observed by the James Webb Space Telescope and has a redshift of z = 14.44. If the current cosmic microwave background (CMB) temperature is 2.725 K, what was the CMB temperature at MoM-z14?
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Source
USAAAO 2026 First Round, Question 18. Question text, choices, and answer were transcribed from the official USAAAO exam and solutions PDFs.