|
gptkbp:instanceOf
|
astronomical association
|
|
gptkbp:characterizedBy
|
young massive stars
loose stellar grouping
|
|
gptkbp:composedOf
|
gptkb:B-type_stars
gptkb:O-type_stars
|
|
gptkbp:discoveredBy
|
gptkb:Adriaan_Blaauw
|
|
gptkbp:discoveredIn
|
1947
|
|
gptkbp:dissolveInto
|
galactic field stars
|
|
gptkbp:distanceFromEarth
|
hundreds to thousands of light-years
|
|
gptkbp:example
|
gptkb:Orion_OB1_Association
gptkb:Perseus_OB2_Association
gptkb:Scorpius–Centaurus_Association
|
|
gptkbp:foundIn
|
irregular galaxies
spiral galaxies
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
OB associations
|
|
gptkbp:lifespan
|
few million years
|
|
gptkbp:mayInclude
|
gptkb:H_II_regions
supernova remnants
runaway stars
|
|
gptkbp:namedAfter
|
dominant spectral types (O and B)
|
|
gptkbp:observedBy
|
optical telescopes
infrared telescopes
|
|
gptkbp:relatedTo
|
stellar evolution
star formation
|
|
gptkbp:size
|
tens to hundreds of parsecs
|
|
gptkbp:velocityDispersion
|
low
|
|
gptkbp:bfsParent
|
gptkb:Luminous_blue_variable
gptkb:Adriaan_Blaauw
gptkb:Cygnus_X_region
gptkb:Large_Magellanic_Cloud
gptkb:Scutum-Centaurus_Arm
gptkb:Scutum–Centaurus_Arm
|
|
gptkbp:bfsLayer
|
6
|