Active Galactic Nucleus	Irregular Galaxy	Peculiar Velocity
Anti-Spiral Theorem	Isotropy	Plummer-Kuzmin Models
Barred Galaxy	Kuzmin Model	Plummer Model
Dark Matter	Large Magellanic Cloud	Quantized Redshift
de Vaucouleurs Law	Lin-Shu Hypothesis	Quasistellar Object
Elliptical Galaxy	Local Group	Rotation Curve
Faber-Jackson Law	Local Standard of Rest	Schechter's Luminosity Fu...
Fundamental Plane	Local Supercluster	Sculptor Group
Galaxies	Luminosity Density	Seyfert 1 Galaxy
Galactic Coordinates	Luminosity Function	Seyfert 2 Galaxy
Galactic Groups	Luminosity Test	Small Magellanic Cloud
Galactic Morphology	M81 Group	Spiral Arm
Galactic Potential	Messier Objects	Spiral Galaxy
Galaxy	Milky Way Galaxy	Sunyaev-Zel'dovich Effect
Galaxy Spider Diagram	Missing Mass	Temperature
Great Attractor	Nucleosynthesis	Toomre's Model
Great Wall	Omega	Toomre's Stability Criter...
Holmberg Radius	Oort Constants	Universe
Homogeneity	Oort Limit	Winding Problem
Hubble-Reynolds Law	Ostriker-Peebles Criterion