A quasar (/ˈkweɪzɑːr/) (also quasi-stellar object or QSO) is an active galactic nucleus of very . Because these changes occur very rapidly they define an upper limit on the volume of a quasar ; quasars are not much larger than the Solar. Many astronomers believe that quasars are the most distant objects yet detected in the universe. Quasars give off enormous amounts of energy - they can be a. Quasar definition, one of over a thousand known extragalactic objects, starlike in appearance and having spectra with characteristically large redshifts, that are. 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. Discovery of a Physical Quasar Triplet". Word Origin and History for quasar Expand. Die Selektion liefert zunächst eine umfangreiche Liste von Kandidaten, die auf optischen Aufnahmen punktförmig erscheinen. Astronomers called them "quasi-stellar radio sources," or "quasars," because the signals came from one place, like a star. Quasars are part of a class of objects known as active galactic nuclei AGN. Karl Otto Münnich, Heidelberg A Essay Umweltphysik Dr. Send to Email Address Your Name Your Email Address jQuery document. Mitarbeiter Band I und II Redaktion: Retrieved 5 March Emission lines of hydrogen mainly of the Lyman series and Balmer series , helium, carbon, magnesium, iron and oxygen are the brightest lines. Fast motions strongly indicate a large mass.