@prefix skos: <http://www.w3.org/2004/02/skos/core#> .

<http://astrothesaurus.org/uat/640>
  skos:prefLabel "Gegenschein"@en ;
  a skos:Concept ;
  skos:broader <http://astrothesaurus.org/uat/1112> .

<http://astrothesaurus.org/uat/1112>
  skos:altLabel "Night sky background"@en ;
  skos:broader <http://astrothesaurus.org/uat/1462> ;
  skos:prefLabel "Night sky brightness"@en ;
  skos:narrower <http://astrothesaurus.org/uat/640>, <http://astrothesaurus.org/uat/2318> ;
  a skos:Concept .

<http://astrothesaurus.org/uat/2318>
  skos:prefLabel "Light pollution"@en ;
  a skos:Concept ;
  skos:broader <http://astrothesaurus.org/uat/1112> .

<http://astrothesaurus.org/uat/1462>
  skos:prefLabel "Sky brightness"@en ;
  a skos:Concept ;
  skos:narrower <http://astrothesaurus.org/uat/1112> .