cosmic microwave background
nounDefinition of cosmic microwave background
Examples of cosmic microwave background in a Sentence
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The electrons then smash into the ambient photons that pervade the universe as a part of the cosmic microwave background and send them speeding through the galaxy. — Dennis Normile, Science | AAAS, "Highest energy light ever seen traced to Crab Nebula," 8 July 2019 That's at odds with the best estimates from Planck, a European Space Agency telescope that made the best measurements to date of the cosmic microwave background. — National Geographic, "The universe seems to be expanding faster than all expectations," 25 Apr. 2019 Studies of the cosmic microwave background (CMB) — the leftover light from the Big Bang — would confirm these initial estimates. — Quanta Magazine, "The Last of the Universe’s Ordinary Matter Has Been Found," 10 Sep. 2018 From 2009 to 2013, Planck made exacting observations of the cosmic microwave background, the relic radiation from the Big Bang. — Corey S. Powell, Discover Magazine, "Why We Still Don't Know How Fast the Universe is Expanding," 1 Jan. 2019 From 2009 to 2013 Planck created an unprecedentedly detailed map of the cosmic microwave background (CMB), the afterglow of the big bang’s primordial fireball from when the universe was only 380,000 years old. — Lee Billings, Scientific American, "Cosmic Conflict: Diverging Data on Universe’s Expansion Polarizes Scientists," 16 May 2018 This hypothetical signal is distinct from a much longer-wavelength one from even earlier on, which might appear in the Universe’s oldest visible radiation: the cosmic microwave background. — Davide Castelvecchi, Scientific American, "Here Come the Waves," 23 Apr. 2018 In fact, neutrinos are the second most ubiquitous particles, second only to the cosmic microwave background photons left over from the Big Bang. — Smithsonian, "Scientists Explain The Thrill of Detecting a Neutrino From a Far-Off Galaxy," 12 July 2018 These amplified gravitational waves would leave their imprint on the polarization of the cosmic microwave background. — Alexander Hellemans, Scientific American, "A Conversation with Thomas Hertog, One of Stephen Hawking’s Final Collaborators," 24 May 2018These example sentences are selected automatically from various online news sources to reflect current usage of the word 'cosmic microwave background.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
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