: 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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Imagine a distant light source, like a quasar, that sends light traveling for billions of light-years.
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Paul Sutter, Space.com, 20 Dec. 2025
Whenever the quasar brightened or dimmed, those changes showed up in the multiple images but with tiny delays.
—Rupendra Brahambhatt, Interesting Engineering, 7 Dec. 2025
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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Paul Sutter, Space.com, 20 Dec. 2025
Whenever the quasar brightened or dimmed, those changes showed up in the multiple images but with tiny delays.
—Rupendra Brahambhatt, Interesting Engineering, 7 Dec. 2025
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 8 Jan. 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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