اختروش

Also known as Quasi-Stellar Radio Source, Quasi-Stellar Object, QSO

thumb|upright=1.35|Artist's image of the accretion disc in ULAS J1120+0641, a very distant quasar containing a supermassive black hole with a mass two billion times that of the Sun thumb|The Chandra X-ray Observatory|Chandra X-ray image of [[PKS 1127-145, a quasar about 10 billion light-years from Earth. An X-ray jet extends at least a million light-years from the quasar. Image is 60 arcseconds on a side. RA 11h 30m 7.10s Dec −14° 49' 27" in Crater. Observation date: May 28, 2000. Instrument: ACIS]]