| 释义 |
WordReference Random House Learner's Dictionary of American English © 2024qua•sar /ˈkweɪzɑr, -sɑr/USA pronunciation n. [countable]- Astronomya starlike object that is extremely distant from the earth and extremely bright.
WordReference Random House Unabridged Dictionary of American English © 2024qua•sar (kwā′zär, -zər, -sär, -sər),USA pronunciation n. [Astron.]- Astronomyone of over a thousand known extragalactic objects, starlike in appearance and having spectra with characteristically large redshifts, that are thought to be the most distant and most luminous objects in the universe. Also called quasi-stellar object.
- quas(i-stell)ar, in quasi-stellar radio source, the first type of quasar discovered 1960–65
Collins Concise English Dictionary © HarperCollins Publishers:: quasar /ˈkweɪzɑː -sɑː/ n - any of a class of extragalactic objects that emit an immense amount of energy in the form of light, infrared radiation, etc, from a compact source. They are extremely distant and their energy generation is thought to involve a supermassive black hole located in the centre of a galaxy
Etymology: 20th Century: quas(i-stell)ar (object) |