@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix dc: <http://purl.org/dc/terms/> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<http://astrothesaurus.org/uat/1139>
  skos:prefLabel "O supergiant stars"@en ;
  a skos:Concept ;
  skos:broader <http://astrothesaurus.org/uat/1137> .

<http://astrothesaurus.org/uat/1154>
  skos:prefLabel "Oef stars"@en ;
  a skos:Concept ;
  skos:broader <http://astrothesaurus.org/uat/1137> .

<http://astrothesaurus.org/uat/1132>
  skos:prefLabel "O subgiant stars"@en ;
  a skos:Concept ;
  skos:broader <http://astrothesaurus.org/uat/1137> .

<http://astrothesaurus.org/uat/1137>
  skos:narrower <http://astrothesaurus.org/uat/1138>, <http://astrothesaurus.org/uat/1132>, <http://astrothesaurus.org/uat/1139>, <http://astrothesaurus.org/uat/1153>, <http://astrothesaurus.org/uat/1154>, <http://astrothesaurus.org/uat/1135>, <http://astrothesaurus.org/uat/1155>, <http://astrothesaurus.org/uat/1136> ;
  skos:definition "A luminous, hot, blue star whose spectrum is dominated by the lines of hydrogen, atomic helium, and ionized helium; also known as O-type star. This is the earliest spectral type and the only main sequence star in which ionized helium is present. The effective temperatures of these stars range from about 30,000 K to 50,000 K, their luminosities from 50,000 to 1,000,000 times that of solar luminosity, and their masses from about 20 to 100 solar masses. The hottest O-type stars display high ionization emission features such as N III and He II, Of star. They are divided into subtypes O2, the hottest, to O9.7, the coldest. O-type stars are relatively rare, for each star of 100 solar masses there are 10^6 stars of solar mass. They are relatively short-lived since they spend only a few million years on the main sequence. The brightest O-type star in the sky visible with naked eye is Alnitak."@en ;
  skos:editorialNote [ ] ;
  a skos:Concept ;
  dc:modified "2020-11-03T19:47:07.379Z"^^xsd:dateTime, "2020-11-03T19:46:55.553Z"^^xsd:dateTime ;
  skos:broader <http://astrothesaurus.org/uat/2051>, <http://astrothesaurus.org/uat/430> ;
  dc:contributor <http://editor.vocabs.ands.org.au/user/AAS_Frey.Katie_Admin> ;
  skos:related <http://astrothesaurus.org/uat/1589> ;
  skos:altLabel "Class O stars"@en, "O-type stars"@en ;
  skos:prefLabel "O stars"@en .

<http://astrothesaurus.org/uat/1589>
  skos:prefLabel "Stellar classification"@en ;
  a skos:Concept ;
  skos:related <http://astrothesaurus.org/uat/1137> .

<http://astrothesaurus.org/uat/1135>
  skos:prefLabel "O dwarf stars"@en ;
  a skos:Concept ;
  skos:broader <http://astrothesaurus.org/uat/1137> .

<http://astrothesaurus.org/uat/1155>
  skos:prefLabel "Of stars"@en ;
  a skos:Concept ;
  skos:broader <http://astrothesaurus.org/uat/1137> .

<http://astrothesaurus.org/uat/1138>
  skos:prefLabel "O subdwarf stars"@en ;
  a skos:Concept ;
  skos:broader <http://astrothesaurus.org/uat/1137> .

<http://astrothesaurus.org/uat/1153>
  skos:prefLabel "Oe stars"@en ;
  a skos:Concept ;
  skos:broader <http://astrothesaurus.org/uat/1137> .

<http://astrothesaurus.org/uat/430>
  skos:prefLabel "Early-type stars"@en ;
  a skos:Concept ;
  skos:narrower <http://astrothesaurus.org/uat/1137> .

<http://astrothesaurus.org/uat/2051>
  skos:prefLabel "Stellar spectral types"@en ;
  a skos:Concept ;
  skos:narrower <http://astrothesaurus.org/uat/1137> .

<http://astrothesaurus.org/uat/1136>
  skos:prefLabel "O giant stars"@en ;
  a skos:Concept ;
  skos:broader <http://astrothesaurus.org/uat/1137> .