KnowraStellar associationLinked fromLinked fromThe 12 pages that link to Stellar association, each with the reason it gives.All 12Broader topic 1Related 3Narrower topic 1Compared with 7Star systemCompared with: It distinguishes a stellar grouping from a gravitationally bound star system.Stellar populationCompared with: A stellar association is defined by spatial and dynamical coherence, not only shared population properties.Open clusterCompared with: Associations resemble open clusters in origin but lack lasting gravitational cohesion.Emission nebulaRelated: Massive members of stellar associations commonly provide the radiation that illuminates nearby nebulae.Stellar streamCompared with: Unlike a stream, it is generally a young stellar grouping rather than tidal debris.Star clusterCompared with: Associations share a birthplace with clusters but disperse rather than remain bound.Stellar ageRelated: Shared formation makes association membership a useful source of age constraints.Double ClusterRelated: The two clusters are associated with a larger population of young Perseus stars.Beehive ClusterCompared with: Unlike such loose groupings, the Beehive remains a recognizable gravitationally bound cluster.Messier 7Compared with: Unlike an association, Messier 7 is a gravitationally bound open cluster.Viktor AmbartsumianBroader topic: Ambartsumian identified these groups and used their expansion to argue that stars continue to form.Westerhout 40Narrower topic: Young stars associated with Westerhout 40 belong to a broader grouping in the region.