quasar

noun

qua·​sar ˈkwā-ˌzär 

also -ˌsär

: a region at the center of a galaxy that produces an extremely large amount of radiation

Examples of quasar in a Sentence

Recent Examples on the Web

Thus, the hunt for the earliest quasars has been on for decades, with scientists hoping that the discovery of these bodies could help explain how supermassive black holes grew so rapidly so shortly after the Big Bang. — Robert Lea, Space.com, 9 July 2026

But now, the European Space Agency's Euclid Space Telescope has identified a clutch of primordial quasars, dating to some 13 billion years ago—putting them among the oldest of these objects ever found in the universe. — Adam Kovac, Scientific American, 7 July 2026

Word History

Etymology

quasi-stellar

First Known Use

1964, in the meaning defined above

Kids 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