@prefix mdl: <http://data.loterre.fr/ark:/67375/MDL> .
@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#> .

mdl: a skos:ConceptScheme .
mdl:-HLDK792C-J
  skos:definition "An expanding cloud of debris from the explosion of a Type I supernova in the constellation Taurus. Its light reached Earth in 1054 and was visible to the naked eye even in the daytime. Lying about 6,300 light-years away, the Crab nebula is an intense radio source (Tau A), and also a source of X-rays and gamma-rays. The diameter of the supernova remnant is about 6 light-years; it is expanding at velocity of 1000 km/sec.  (An Etymological Dictionary of Astronomy and Astrophysics, by M. Heydari-Malayeri, <a href=\"https://dictionary.obspm.fr/index.php?formSearchTextfield=crab+nebula&formSubmit=Search&showAll=1\" target=\"_blank\">https://dictionary.obspm.fr/index.php?formSearchTextfield=crab+nebula&formSubmit=Search&showAll=1</a>)"@en, "La nébuleuse du Crabe (M1, NGC 1952, Taurus A, Taurus X-1, Sh2-244) est un rémanent de supernova résultant de l'explosion d'une étoile massive en supernova historique (SN 1054). (Wikipedia, L'Encylopédie Libre, <a href=\"https://fr.wikipedia.org/wiki/N%C3%A9buleuse_du_Crabe\" target=\"_blank\">https://fr.wikipedia.org/wiki/N%C3%A9buleuse_du_Crabe</a>)"@fr ;
  dc:modified "2022-09-14"^^xsd:date ;
  skos:exactMatch <https://dictionary.obspm.fr/index.php?formSearchTextfield=crab+nebula&formSubmit=Search&showAll=1>, <https://fr.wikipedia.org/wiki/N%C3%A9buleuse_du_Crabe> ;
  skos:prefLabel "Crab Nebula"@en, "nébuleuse du Crabe"@fr ;
  skos:hiddenLabel "Nébuleuse Crabe"@fr, "nébuleuses des Crabe"@fr, "Crab nebula"@en ;
  skos:inScheme mdl: ;
  a skos:Concept ;
  skos:broader mdl:-WN3S6KR9-W .

mdl:-WN3S6KR9-W
  skos:prefLabel "supernova remnant"@en, "reste de supernova"@fr ;
  a skos:Concept ;
  skos:narrower mdl:-HLDK792C-J .