@prefix rdf: . @prefix skos: . @prefix rdfs: . @prefix api: . @prefix foaf: . rdfs:label "The Unified Astronomy Thesaurus"@en ; skos:hasTopConcept . skos:broader . skos:broader . skos:broader . skos:broader . a skos:Concept , rdfs:Resource ; skos:altLabel "Planetary astronomy"@en ; skos:narrower , , , ; skos:prefLabel "Solar system astronomy"@en ; skos:scopeNote "Referring specifically the study of our solar system, not exoplanets."@en ; skos:topConceptOf . a api:ItemEndpoint , api:Page ; api:definition ; api:extendedMetadataVersion ; foaf:primaryTopic .