: 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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After the detection of hydrogen, astronomers discovered previously unknown types of stars, such as pulsars and quasars.
—
Gabriela Radulescu, The Conversation, 4 Nov. 2025
The universe is overwhelmingly made of matter, which is responsible for visible structures ranging from atoms to galaxies, and quarks to quasars.
—Chris Young, Interesting Engineering, 23 Oct. 2025
Found by Hubble before JWST’s launch, GNz7q looked like a mix of a galaxy and a quasar.
—Big Think, 20 Oct. 2025
Still, if this is the engine behind all AGN, why do quasars, Seyferts and blazars all appear so different from each other?
—Phil Plait, Scientific American, 16 Oct. 2025
See All Example Sentences for quasar
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Gabriela Radulescu, The Conversation, 4 Nov. 2025
The universe is overwhelmingly made of matter, which is responsible for visible structures ranging from atoms to galaxies, and quarks to quasars.
—Chris Young, Interesting Engineering, 23 Oct. 2025
Found by Hubble before JWST’s launch, GNz7q looked like a mix of a galaxy and a quasar.
—Big Think, 20 Oct. 2025
Still, if this is the engine behind all AGN, why do quasars, Seyferts and blazars all appear so different from each other?
—Phil Plait, Scientific American, 16 Oct. 2025
See All Example Sentences for quasar
Cite this Entry
“Quasar.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/quasar. Accessed 9 Nov. 2025.
Copy CitationKids Definition
quasar
noun
qua·sar
ˈkwā-ˌzär 
also -ˌsär
: any of the very distant starlike heavenly objects that give off very strong blue and ultraviolet light and powerful radio waves
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