qua·​sar | \ ˈkwā-ˌzär also -ˌsär How to pronounce quasar (audio) \

Definition of quasar

: a region at the center of a galaxy that produces an extremely large amount of radiation

Examples of quasar in a Sentence

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Other astronomers had spotted strange sources of radio waves known as quasars at enormous distances — two-thirds of the way back to the universe’s beginning. Quanta Magazine, "The Astronomer Who’d Rather Build Space Cameras," 18 Apr. 2019 It was believed that if this happened, a large amount of light would be emitted, which is called a quasar. Ashley Strickland, CNN, "Hubble spies something mysterious around a supermassive black hole," 11 July 2019 After hundreds of millions of years, young stars or quasars emitted enough light to strip the electrons back off these atoms, dissipating the cosmic fog like mist at dawn. Quanta Magazine, "Earliest Black Hole Gives Rare Glimpse of Ancient Universe," 6 Dec. 2017 Although mostly a technology demonstration, the 15-centimeter scope has been collecting data on quasars, blazars, novae, and other hot bright objects and beaming them back to Earth in quantities Carruthers couldn't have imagined in the days of film. Daniel Clery, Science | AAAS, "Could humanity’s return to the moon spark a new age of lunar telescopes?," 18 July 2019 The quasar’s discovery established a critical transition point on the cryptic timeline of the early universe. Quanta Magazine, "The Astronomer Who’d Rather Build Space Cameras," 18 Apr. 2019 Astronomers believe that the supermassive black holes at the centers of galaxies actually power quasars. Ashley Strickland, CNN, "'Cold quasar' discovery could signal galaxies' 'retirement party' phase," 12 June 2019 Eclipses continued to corroborate Einstein’s predictions for decades, eventually eclipsed (so to speak) by the advent of quasar observations. Devin Powell, Discover Magazine, "How the 1919 Solar Eclipse Made Einstein the World's Most Famous Scientist," 24 May 2019 Meanwhile, pressure from the swirling material would squeeze matter and energy out the poles of the doughnut, making the characteristic jet that radio astronomers can see erupting from the hearts of many galaxies and quasars. Dennis Overbye, New York Times, "Black Hole Drags Star to Dusty Death," 14 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'quasar.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of quasar

1964, in the meaning defined above

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22 Aug 2019

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The first known use of quasar was in 1964

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English Language Learners Definition of quasar

astronomy : a very bright object in space that is similar to a star and that is very far away from the Earth and gives off powerful radio waves

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Britannica.com: Encyclopedia article about quasar

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to make or get by devious means

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