A quasar is an object far away in space that produces bright light and radio waves.
quasar in British English
(ˈkweɪzɑː, -sɑː)
noun
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
Word origin
C20: quas(i-stell)ar (object)
quasar in American English
(ˈkweɪˌzɑr; ˈkweɪˌsɑr)
US
noun
any of a number of starlike celestial objects that emit immense amounts of light and, often, radio waves, characterizedby having spectral lines with very large redshifts: quasars are thought to be the most distant and oldest observable objects in the universe
Word origin
< quas(i-stell)ar (radio source)
Examples of 'quasar' in a sentence
quasar
It is the biggest black hole in the known universe and powers the brightest quasar in the cosmos.
Times, Sunday Times (2015)
The exact nature of quasars is not known but they are now believed to be the nuclei at the centre of galaxies.
Times, Sunday Times (2010)
It will capture ultraviolet light emanating from distant objects including a quasar that is believed to have formed five billion years ago.
Times, Sunday Times (2009)
Or you might find yourself battling against the explosive, angry forces of a quasar.