Quasar meaning

kwāzär, -sär, -zər, -sər
Frequency:
(astronomy) An extragalactic object, starlike in appearance, that is among the most luminous and thought to be the most distant objects in the universe.
noun
1
0
A compact, extremely bright celestial object whose power output can be hundreds to several thousand times that of the entire Milky Way galaxy. Quasars are among the most distant objects in the universe and are generally considered to be a form of active galactic nucleus.
noun
0
1
Any of a number of starlike celestial objects that emit immense amounts of light and, often, radio waves, characterized by having spectral lines with very large redshifts: quasars are thought to be the most distant and oldest observable objects in the universe.
noun
0
1
Short for quasi-stellar radio source . A compact, starlike celestial body with a power output greater than our entire galaxy. Believed to be the oldest and most distant objects ever detected, quasars are billions of light-years from Earth and moving away from us at nearly 80 percent of the speed of light. For this reason, quasars are highly important to astronomers' understanding of the early universe. Little is currently understood about the nature of quasars; one theory suggests that they are produced by giant black holes destroying enormous amounts of matter, causing the subsequent ejection of radiation along their north and south poles. Many astronomers believe that quasars represent an early stage in the evolution of galaxies such as our own.
0
1
Advertisement

Origin of quasar

  • From earlier quas(i-stell)ar (radio source)

    From American Heritage Dictionary of the English Language, 5th Edition

  • From quasi-stellar radio source.

    From Wiktionary