单词	cosmic microwave background
释义	cosmic microwave background noun : background radiation Example Sentences Recent Examples on the Web The first generation came of age in the late 1990s and early 2000s with the Hubble Space Telescope (HST) and with NASA’s WMAP satellite that sharpened our measurements of the universe’s oldest light, the cosmic microwave background (CMB). Anil Ananthaswamy, Scientific American, 18 Apr. 2022 From there, the team began using microwaves from the cosmic microwave background (CMB). Joshua Hawkins, BGR, 3 Aug. 2022 Cyr-Racine’s idea makes the cosmic microwave background radiation compatible with a smaller universe. Manasee Wagh, Popular Mechanics, 1 June 2022 That’s when the cosmic microwave background was emitted, is when that happens. Quanta Magazine, 18 May 2022 Planck, another space observatory, was used to measure the cosmic microwave background, or the leftover radiation from the big bang 13.8 billion years ago. Ashley Strickland, CNN, 23 May 2022 The light from this epoch, now stretched to microwave wavelengths because of the universe’s subsequent expansion, is detectable as the all-pervading cosmic microwave background. Anil Ananthaswamy, Scientific American, 18 Apr. 2022 These researchers rely on the cosmic microwave background, a residual glow of radiation from roughly 400,000 years after the big bang. Daniel Leonard, Scientific American, 25 Jan. 2022 By deducing the expansion rate from Planck’s cosmic microwave background data, researchers could estimate how many types of neutrinos filled the young cosmos. Quanta Magazine, 28 Oct. 2021 See More Word History First Known Use 1981, in the meaning defined above
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