Stellar types
type: Concept
narrower: Early-type stars

Early-type supergiant stars
type: Concept
broader: Early-type stars

O stars
type: Concept
broader: Early-type stars

OB stars
type: Concept
broader: Early-type stars

Early-type emission stars
type: Concept
broader: Early-type stars

Early-type variable stars
type: Concept
broader: Early-type stars

A stars
type: Concept
broader: Early-type stars

B stars
type: Concept
broader: Early-type stars

Early-type stars
type: Concept
narrower: Early-type emission stars
narrower: Early-type supergiant stars
narrower: O stars
narrower: Early-type variable stars
narrower: OB stars
narrower: A stars
narrower: Faint blue stars
narrower: B stars
alternative label: Hot stars
alternative label: Early type stars
contributor: AAS Frey.Katie
modified: 2020-10-30T19:16:42.524Z
modified: 2020-10-30T19:16:58.03Z
definition: Hot, luminous stars of spectral type O, B, A, and F0 to F5. They were originally thought, wrongly, to be at an earlier stage of evolution than late-type stars.
broader: Stellar types

Faint blue stars
type: Concept
broader: Early-type stars