: 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 other words, this quasar appears older than its years.
—
Keith Cooper, Space.com, 12 June 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
After the detection of hydrogen, astronomers discovered previously unknown types of stars, such as pulsars and quasars.
—Gabriela Radulescu, The Conversation, 4 Nov. 2025
Many of those newfound objects were incredibly far away and therefore extremely luminous, but looked so much like stars that they were dubbed quasi-stellar radio sources, or quasars for short.
—Phil Plait, Scientific American, 16 Oct. 2025
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Keith Cooper, Space.com, 12 June 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
After the detection of hydrogen, astronomers discovered previously unknown types of stars, such as pulsars and quasars.
—Gabriela Radulescu, The Conversation, 4 Nov. 2025
Many of those newfound objects were incredibly far away and therefore extremely luminous, but looked so much like stars that they were dubbed quasi-stellar radio sources, or quasars for short.
—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 18 Jun. 2026.
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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