: 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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In the case of this Einstein Cross, the gravitational lens is the galaxy J1453g in near-perfect alignment with Earth and a distant quasar, the active region at the heart of the galaxy, which is powered by a feeding supermassive black hole.
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Robert Lea, Space.com, 14 Apr. 2026
The team spotted the distant quasar, an actively feeding supermassive black hole, using observations from the Subaru Telescope.
—Georgina Jedikovska, Interesting Engineering, 23 Jan. 2026
Those same atoms, molecules, and/or ions absorb the light from behind them — whether from a quasar, a background galaxy, a star, or from the continuum — revealing those same characteristic quantum transitions.
—Big Think, 19 Nov. 2025
After the detection of hydrogen, astronomers discovered previously unknown types of stars, such as pulsars and quasars.
—Gabriela Radulescu, The Conversation, 4 Nov. 2025
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Robert Lea, Space.com, 14 Apr. 2026
The team spotted the distant quasar, an actively feeding supermassive black hole, using observations from the Subaru Telescope.
—Georgina Jedikovska, Interesting Engineering, 23 Jan. 2026
Those same atoms, molecules, and/or ions absorb the light from behind them — whether from a quasar, a background galaxy, a star, or from the continuum — revealing those same characteristic quantum transitions.
—Big Think, 19 Nov. 2025
After the detection of hydrogen, astronomers discovered previously unknown types of stars, such as pulsars and quasars.
—Gabriela Radulescu, The Conversation, 4 Nov. 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 16 Apr. 2026.
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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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