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

<http://astrothesaurus.org/uat/1300>
  skos:prefLabel "Protoplanetary disks"@en ;
  a skos:Concept ;
  skos:broader <http://astrothesaurus.org/uat/1257> .

<http://astrothesaurus.org/uat/1241>
  skos:prefLabel "Planet formation"@en ;
  a skos:Concept ;
  skos:broader <http://astrothesaurus.org/uat/1257> .

<http://astrothesaurus.org/uat/1257>
  skos:broader <http://astrothesaurus.org/uat/1255> ;
  skos:prefLabel "Planetary system formation"@en ;
  skos:narrower <http://astrothesaurus.org/uat/1300>, <http://astrothesaurus.org/uat/1241>, <http://astrothesaurus.org/uat/1530> ;
  a skos:Concept .

<http://astrothesaurus.org/uat/1255>
  skos:prefLabel "Planetary science"@en ;
  a skos:Concept ;
  skos:narrower <http://astrothesaurus.org/uat/1257> .

<http://astrothesaurus.org/uat/1530>
  skos:prefLabel "Solar system formation"@en ;
  a skos:Concept ;
  skos:broader <http://astrothesaurus.org/uat/1257> .