R associations
modified: 2020-11-05T20:27:55.187Z
modified: 2020-11-05T20:27:39.924Z
type: Concept
contributor: AAS Frey.Katie Admin
related: Reflection nebulae
definition: A stellar association containing a number of reflection nebulae. The stars are of low or intermediate mass and young, less than a million years old. They are still surrounded by patches of dust that reflect and absorb light from the interstellar cloud in which they formed. This type of association was first suggested by Sidney van den Bergh.
alternative label: R-association
broader: Stellar associations

Reflection nebulae
type: Concept
related: R associations

Stellar associations
type: Concept
narrower: R associations