quasar
active galactic nuclei containing a massive black hole
hot, dust-obscured galaxies
rare type of quasar
Andromeda Galaxy
barred spiral galaxy within the Local Group
Hercules A
active galaxy in the constellation Hercules
Circinus Galaxy
Closest Seyfert Galaxy
Cygnus A
radio galaxy
Twin Quasar
gravitationally lensed quasar
Einstein Cross
image of a quasar
Cloverleaf quasar
rare example of a quadruply-lensed quasar