Galaxy
Seyfert Galaxy
A spiral galaxy with a bright, active nucleus.
Spiral galaxies whose nuclei show strong emission lines, indicating an accreting supermassive black hole. Split into Seyfert 1 and 2 types.
Overview
Spiral galaxies whose nuclei show strong emission lines, indicating an accreting supermassive black hole. Split into Seyfert 1 and 2 types.
See also
LINER
A galaxy with a low-luminosity active nucleus.
Lenticular Galaxy
A disc galaxy without spiral arms.
Triangulum Galaxy (M33)
Third-largest galaxy in our Local Group.
Whirlpool Galaxy (M51)
A textbook spiral, mid-merger with a companion.
Spiral Galaxy
A flattened disc with sweeping spiral arms.
Barred Spiral Galaxy
A spiral with a straight bar across its centre.