H II Regions

GPTKB entity

Statements (23)
Predicate Object
gptkbp:instanceOf astronomer
gptkbp:associatedWith star formation
gptkbp:composedOf ionized hydrogen
gptkbp:contains gptkb:plasma
dust
young massive stars
gptkbp:density ~10-10,000 particles/cm³
gptkbp:discoveredBy gptkb:William_Huggins
gptkbp:emits gptkb:H-alpha_radiation
gptkbp:example gptkb:Orion_Nebula
gptkb:Eagle_Nebula
gptkb:Lagoon_Nebula
gptkbp:foundIn galaxies
https://www.w3.org/2000/01/rdf-schema#label H II Regions
gptkbp:ionizedBy radiation therapy
gptkbp:lifespan a few million years
gptkbp:role galactic chemical evolution
gptkbp:size few to hundreds of light-years
gptkbp:studiedIn optical astronomy
radio astronomy
gptkbp:temperature ~10,000 K
gptkbp:bfsParent gptkb:Milky_Way_galaxy
gptkbp:bfsLayer 5