How to use in-sentence of “quasar”:
+ The energy emitted by a quasar is gravitational energy, created from mass falling onto the accretion disc around the black hole.
+ The Cloverleaf quasar is visually in Bootes.
+ The light of the quasar does not travel in a straight line to earth.
+ Several dozen nearby large galaxies, with no sign of a quasar nucleus, have a similar central black hole in their nuclei.
+ Four images of the same distant quasar appear around this foreground galaxy due to strong gravitational lensing.
+ The quasar sits directly behind ZW 2237+030, Huchra’s lens, the lensing galaxy.
