@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/1476>
  skos:prefLabel "Solar physics"@en ;
  a skos:Concept ;
  skos:narrower <http://astrothesaurus.org/uat/1653> .

<http://astrothesaurus.org/uat/1651>
  skos:prefLabel "Sunspot groups"@en ;
  a skos:Concept ;
  skos:broader <http://astrothesaurus.org/uat/1653> .

<http://astrothesaurus.org/uat/1979>
  skos:prefLabel "Delta sunspots"@en ;
  a skos:Concept ;
  skos:broader <http://astrothesaurus.org/uat/1653> .

<http://astrothesaurus.org/uat/1974>
  skos:prefLabel "Solar active regions"@en ;
  a skos:Concept ;
  skos:narrower <http://astrothesaurus.org/uat/1653> .

<http://astrothesaurus.org/uat/1803>
  skos:prefLabel "Wilson effect"@en ;
  a skos:Concept ;
  skos:broader <http://astrothesaurus.org/uat/1653> .

<http://astrothesaurus.org/uat/1652>
  skos:prefLabel "Sunspot number"@en ;
  a skos:Concept ;
  skos:broader <http://astrothesaurus.org/uat/1653> .

<http://astrothesaurus.org/uat/1650>
  skos:prefLabel "Sunspot cycle"@en ;
  a skos:Concept ;
  skos:related <http://astrothesaurus.org/uat/1653> .

<http://astrothesaurus.org/uat/1978>
  skos:prefLabel "Sunspot flow"@en ;
  a skos:Concept ;
  skos:broader <http://astrothesaurus.org/uat/1653> .

<http://astrothesaurus.org/uat/463>
  skos:prefLabel "Ephemeral active regions"@en ;
  a skos:Concept ;
  skos:broader <http://astrothesaurus.org/uat/1653> .

<http://astrothesaurus.org/uat/1015>
  skos:prefLabel "Maunder minimum"@en ;
  a skos:Concept ;
  skos:broader <http://astrothesaurus.org/uat/1653> .

<http://astrothesaurus.org/uat/1653>
  skos:narrower <http://astrothesaurus.org/uat/1651>, <http://astrothesaurus.org/uat/1803>, <http://astrothesaurus.org/uat/1652>, <http://astrothesaurus.org/uat/1978>, <http://astrothesaurus.org/uat/463>, <http://astrothesaurus.org/uat/1015>, <http://astrothesaurus.org/uat/1979> ;
  skos:altLabel "Sun spots"@en ;
  a skos:Concept ;
  skos:related <http://astrothesaurus.org/uat/1650>, <http://astrothesaurus.org/uat/1572> ;
  skos:definition "An area seen as a dark patch on the Sun's surface. Sunspots appear dark because they are cooler (of about 4000 °C) than the surrounding photosphere (about 6000 °C). They range in size from a few hundred kilometers to several times the Earth's diameter and last from a few hours to a few months. Very small sunspots are called pores. The number of sunspots varies from maximum to minimum in about 11 years, the sunspot cycle. Their appearance during a cycle follows the Sporer law. A typical spot has a central umbra surrounded by a penumbra, although either features can exist without the other. Sunspots are associated with strong magnetic fields of 0.2 to 0.4 tesla. A given sunspot has a single magnetic polarity. The opposite polarity may be found in other sunspots or in the bright and diffuse facular region adjacent to the sunspot. The first recorded naked-eye sightings of sunspots were by Chinese astronomers in the first century B.C. Johannes Fabricius (1587-1617) was the first to argue that sunspots are areas on the solar surface."@en ;
  dc:modified "2020-11-04T18:50:12.933Z"^^xsd:dateTime, "2020-12-16T20:39:45.185Z"^^xsd:dateTime ;
  skos:editorialNote [ ] ;
  skos:broader <http://astrothesaurus.org/uat/1974>, <http://astrothesaurus.org/uat/1476> ;
  skos:prefLabel "Sunspots"@en ;
  dc:contributor <http://editor.vocabs.ands.org.au/user/AAS_Frey.Katie_Admin> .

<http://astrothesaurus.org/uat/1572>
  skos:prefLabel "Starspots"@en ;
  a skos:Concept ;
  skos:related <http://astrothesaurus.org/uat/1653> .