: 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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Additionally, this quasar is also producing jets of particles moving at nearly the speed of light, a rare feature among quasars.
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Rupendra Brahambhatt, Interesting Engineering, 21 Sep. 2025
The brightness of quasars should make these supermassive black holes pretty conspicuous even at vast distances, and indeed, the team behind the new research used the Subaru Telescope to discover over 200 quasars.
—Robert Lea, Space.com, 11 Sep. 2025
In the late 1960s astronomers started to make extremely high-resolution observations of distant galaxies called quasars.
—Phil Plait, Scientific American, 29 Aug. 2025
Stars burn like celestial nuclear fusion reactors, quasars emit thousands of times the luminosity of the Milky Way galaxy, and asteroids slam into planets.
—Andrew Paul, Popular Science, 4 June 2025
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Rupendra Brahambhatt, Interesting Engineering, 21 Sep. 2025
The brightness of quasars should make these supermassive black holes pretty conspicuous even at vast distances, and indeed, the team behind the new research used the Subaru Telescope to discover over 200 quasars.
—Robert Lea, Space.com, 11 Sep. 2025
In the late 1960s astronomers started to make extremely high-resolution observations of distant galaxies called quasars.
—Phil Plait, Scientific American, 29 Aug. 2025
Stars burn like celestial nuclear fusion reactors, quasars emit thousands of times the luminosity of the Milky Way galaxy, and asteroids slam into planets.
—Andrew Paul, Popular Science, 4 June 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 29 Sep. 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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