@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:-PHBB3VTV-H
  skos:prefLabel "écoulement de refroidissement"@fr, "cooling flow"@en ;
  a skos:Concept ;
  skos:broader mdl:-SB52W5QH-V .

mdl:-SB52W5QH-V
  skos:definition "Un amas de galaxies, ou amas galactique, est l'association de plus d'une centaine de galaxies liées entre elles par la gravitation. En dessous de 100, on parle plutôt de groupe de galaxies, même si la frontière entre groupe et amas n'est pas clairement définie. Ces amas se caractérisent par leur forme spécifique (sphérique, symétrique ou quelconque), ainsi que par la répartition et leurs nombres de galaxies (jusqu'à plusieurs milliers). Ils se sont formés il y a 10 milliards d'années et plus. Ces amas peuvent eux-mêmes s'associer en groupes plus grands pour former des superamas. (Wikipedia, L'Encylopédie Libre, <a href=\"https://fr.wikipedia.org/wiki/Amas_de_galaxies\" target=\"_blank\">https://fr.wikipedia.org/wiki/Amas_de_galaxies</a>)"@fr, "A galaxy cluster, or a cluster of galaxies, is a structure that consists of anywhere from hundreds to thousands of galaxies that are bound together by gravity, with typical masses ranging from 10¹⁴ to 10¹⁵ solar masses. They are the second-largest known gravitationally bound structures in the universe after galaxy filaments and were believed to be the largest known structures in the universe until the 1980s, when superclusters were discovered. One of the key features of clusters is the intracluster medium (ICM). The ICM consists of heated gas between the galaxies and has a peak temperature between 2–15 keV that is dependent on the total mass of the cluster. Galaxy clusters should not be confused with galactic clusters (also known as open clusters), which are star clusters within galaxies, or with globular clusters, which typically orbit galaxies. Small aggregates of galaxies are referred to as galaxy groups rather than clusters of galaxies. The galaxy groups and clusters can themselves cluster together to form superclusters. (Wikipedia, The Free Encyclopedia, <a href=\"https://en.wikipedia.org/wiki/Galaxy_cluster\" target=\"_blank\">https://en.wikipedia.org/wiki/Galaxy_cluster</a>)"@en ;
  skos:narrower mdl:-MB6QRVVH-X, mdl:-PHBB3VTV-H, mdl:-M0JP1TNK-D, mdl:-T5MSZV2L-K, mdl:-KQ2BPPJL-S ;
  skos:related mdl:-J0Q2JP4G-J ;
  skos:altLabel "cluster of galaxies"@en ;
  skos:hiddenLabel "Amas galaxies"@fr, "Galaxy cluster"@en, "galaxy clusters"@en ;
  skos:prefLabel "amas de galaxies"@fr, "galaxy cluster"@en ;
  dc:modified "2022-10-06"^^xsd:date ;
  skos:exactMatch <https://en.wikipedia.org/wiki/Galaxy_cluster>, <https://fr.wikipedia.org/wiki/Amas_de_galaxies> ;
  a skos:Concept ;
  skos:broader mdl:-DKNGMW81-3 ;
  skos:inScheme mdl: .

mdl:-DKNGMW81-3
  skos:prefLabel "galactic and extragalactic astronomy"@en, "astronomie galactique et extragalactique"@fr ;
  a skos:Concept ;
  skos:narrower mdl:-SB52W5QH-V .

mdl:-M0JP1TNK-D
  skos:prefLabel "protocluster"@en, "proto-amas"@fr ;
  a skos:Concept ;
  skos:broader mdl:-SB52W5QH-V .

mdl:-J0Q2JP4G-J
  skos:prefLabel "halo radio"@fr, "radio halo"@en ;
  a skos:Concept ;
  skos:related mdl:-SB52W5QH-V .

mdl:-KQ2BPPJL-S
  skos:prefLabel "Virgo cluster"@en, "amas de la Vierge"@fr ;
  a skos:Concept ;
  skos:broader mdl:-SB52W5QH-V .

mdl:-T5MSZV2L-K
  skos:prefLabel "agencement des galaxies"@fr, "galaxies clustering"@en ;
  a skos:Concept ;
  skos:broader mdl:-SB52W5QH-V .

mdl:-MB6QRVVH-X
  skos:prefLabel "superamas"@fr, "superclusters"@en ;
  a skos:Concept ;
  skos:broader mdl:-SB52W5QH-V .

mdl: a skos:ConceptScheme .