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

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

Recent Examples on the Web The supermassive black hole feeding this quasar is 300 million times more massive than our sun. Ashley Strickland, CNN, 8 Mar. 2021 Liu and her collaborators calculated that the quasar’s light fluctuates over a regular period of about 542 days, meaning that forthcoming data should soon either confirm or reject the pattern. Clara Moskowitz, Scientific American, 22 May 2015 The quasar sits at the center of a young galaxy and is one of the two most powerful quasars discovered in radio waves in the first billion years after the big bang, according to a Tuesday release. Julia Musto, Fox News, 11 Mar. 2021 Scientists are thrilled by this discovery, as its distance from the Earth implies its ancient age — this quasar likely formed when the universe was just 780 million years old. Stefanie Waldek, Travel + Leisure, 10 Mar. 2021 The source of the X-ray jet is a quasar, or a fast-growing supermassive black hole, named PSO J352.4034-15.3373 or PJ352-15. Julia Musto, Fox News, 11 Mar. 2021 Using the European Southern Observatory's Very Large Telescope (ESO's VLT) in Chile, a team of researchers have discovered what might be the universe's most distant radio-loud quasar found to date. Stefanie Waldek, Travel + Leisure, 10 Mar. 2021 George Djorgovski, an astronomer at Caltech who recently found another candidate double–back hole quasar, is not convinced. Clara Moskowitz, Scientific American, 22 May 2015 The quasar has been dubbed J0313-1806 by the astronomers who discovered it. Ashley Strickland, CNN, 14 Jan. 2021

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

History and Etymology for quasar


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Last Updated

28 May 2021

Cite this Entry

“Quasar.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/quasar. Accessed 24 Jul. 2021.

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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

More from Merriam-Webster on quasar

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Britannica.com: Encyclopedia article about quasar


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