O associations
type: Concept
broader: Stellar associations

OB associations
type: Concept
broader: Stellar associations

R associations
type: Concept
broader: Stellar associations

Star clusters
type: Concept
narrower: Stellar associations

Stellar associations
type: Concept
contributor: AAS Frey.Katie Admin
modified: 2020-11-05T20:28:46.006Z
modified: 2020-11-05T20:28:32.807Z
alternative label: Star associations
broader: Star clusters
definition: A large, loose grouping of 10 to 1000 stars that are of similar spectral type and share a common origin. The members move together through space, but have become gravitationally unbound. Stellar associations are primarily identified by their common movement vectors and ages.
narrower: T associations
narrower: R associations
narrower: OB associations
narrower: O associations
related: Stellar kinematics

Stellar kinematics
type: Concept
related: Stellar associations

T associations
type: Concept
broader: Stellar associations