Young stellar objects
type: Concept
narrower: Herbig Ae/Be stars
narrower: FU Orionis stars
narrower: Herbig-Haro objects
narrower: T Tauri stars
related: Stellar evolution
related: Pre-main sequence stars
modified: 2020-11-04T20:54:16.271Z
modified: 2020-11-04T20:54:30.84Z
contributor: AAS Frey.Katie Admin
alternative label: YSO
alternative label: YSOs
broader: Protostars
definition: Any star that has evolved past the protostar stage, but has not yet arrived on the main sequence. There is a variety of YSOs depending on their age, mass, and environment, including Herbig stars, T Tauri stars, and, in general, compact infrared sources embedded in molecular clouds.

Herbig Ae/Be stars
type: Concept
broader: Young stellar objects

FU Orionis stars
type: Concept
broader: Young stellar objects

Herbig-Haro objects
type: Concept
broader: Young stellar objects

T Tauri stars
type: Concept
broader: Young stellar objects

Stellar evolution
type: Concept
related: Young stellar objects

Pre-main sequence stars
type: Concept
related: Young stellar objects

Protostars
type: Concept
narrower: Young stellar objects