Classification systems
type: Concept
narrower: Galaxy classification systems

DDO classification
type: Concept
broader: Galaxy classification systems

Galaxy classification systems
type: Concept
narrower: De Vaucouleurs Sandage classification
narrower: Hubble classification scheme
narrower: DDO classification
related: Elliptical galaxies
related: Galaxy physics
related: Galaxies
alternative label: Galaxy morphological classification
alternative label: Galactic morphology
alternative label: Galaxy classification
alternative label: Classification of galaxies
alternative label: Galaxy morphology
broader: Classification systems

De Vaucouleurs Sandage classification
type: Concept
broader: Galaxy classification systems

Hubble classification scheme
type: Concept
broader: Galaxy classification systems

Elliptical galaxies
type: Concept
related: Galaxy classification systems

Galaxy physics
type: Concept
related: Galaxy classification systems

Galaxies
type: Concept
related: Galaxy classification systems