Stellar classification
type: Concept
related: OB stars

OB stars
type: Concept
alternative label: OB-type stars
related: Stellar classification
broader: Stellar spectral types
broader: Early-type stars
modified: 2020-10-26T19:01:09.117Z
modified: 2020-10-26T19:00:57.65Z
contributor: AAS Frey.Katie
definition: A collective designation for massive O and B stars.
narrower: OB supergiant stars

Stellar spectral types
type: Concept
narrower: OB stars

Early-type stars
type: Concept
narrower: OB stars

OB supergiant stars
type: Concept
broader: OB stars