Galaxy
OVV Quasar
An Optically Violent Variable quasar.
Quasars showing very large, rapid optical brightness changes — a subset of flat-spectrum radio quasars.
Overview
Quasars showing very large, rapid optical brightness changes — a subset of flat-spectrum radio quasars.
See also
BL Lacertae Object
A featureless, variable blazar.
Narrow-line Seyfert 1
An unusually variable young Seyfert.
Triangulum Galaxy (M33)
Third-largest galaxy in our Local Group.
Whirlpool Galaxy (M51)
A textbook spiral, mid-merger with a companion.
Sombrero Galaxy (M104)
An edge-on disc with a luminous bulge.
Large Magellanic Cloud
A satellite of the Milky Way, only visible from the south.