@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/1653>
  skos:prefLabel "Sunspots"@en ;
  a skos:Concept ;
  skos:narrower <http://astrothesaurus.org/uat/1015> .

<http://astrothesaurus.org/uat/1015>
  skos:editorialNote [ ] ;
  dc:modified "2020-11-24T16:47:12.177Z"^^xsd:dateTime, "2020-11-10T19:21:02.629Z"^^xsd:dateTime ;
  skos:broader <http://astrothesaurus.org/uat/1653> ;
  skos:prefLabel "Maunder minimum"@en ;
  skos:definition "A period from about 1645 to 1715 when the number of sunspots was unusually low. This solar activity minimum is attested also through the increased content of carbon-14 in tree rings in that period. The reason is that the cosmic rays which produce carbon-14 reach the Earth in a greater number when there is weak solar activity. The Maunder minimum occurred during a period of cooling of the Earth, called the Little Ice Age. The Maunder minimum is one of a number of periods of low solar activity, including the Dalton minimum, the Sporer minimum, the Wolf minimum, and the Oort minimum."@en ;
  skos:altLabel "Prolonged sunspot minimum"@en ;
  dc:contributor <http://editor.vocabs.ands.org.au/user/AAS_Frey.Katie>, <http://editor.vocabs.ands.org.au/user/AAS_Frey.Katie_Admin> ;
  a skos:Concept .