@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:-S305BWR5-F
  skos:prefLabel "nuage moléculaire géant"@fr, "giant molecular cloud"@en ;
  a skos:Concept ;
  skos:broader mdl:-HGG3VT64-1 .

mdl:-HQL1G7H6-Q
  skos:prefLabel "Orion Molecular Cloud"@en, "nuage moléculaire d'Orion"@fr ;
  a skos:Concept ;
  skos:broader mdl:-HGG3VT64-1 .

mdl:-FL4PF34S-X
  skos:prefLabel "nuage interstellaire"@fr, "interstellar cloud"@en ;
  a skos:Concept ;
  skos:narrower mdl:-HGG3VT64-1 .

mdl:-LN8RVH9K-R
  skos:prefLabel "diffuse interstellar band"@en, "bande interstellaire diffuse"@fr ;
  a skos:Concept ;
  skos:related mdl:-HGG3VT64-1 .

mdl:-PGR159ZJ-Q
  skos:prefLabel "interstellar maser"@en, "maser interstellaire"@fr ;
  a skos:Concept ;
  skos:related mdl:-HGG3VT64-1 .

mdl: a skos:ConceptScheme .
mdl:-HGG3VT64-1
  skos:hiddenLabel "Nuage moléculaires"@fr, "Molecular cloud"@en, "molecular clouds"@en, "Nuage moléculaire"@fr, "nuages moléculaires"@fr ;
  skos:related mdl:-LN8RVH9K-R, mdl:-PGR159ZJ-Q ;
  skos:broader mdl:-FL4PF34S-X ;
  skos:narrower mdl:-S305BWR5-F, mdl:-HQL1G7H6-Q ;
  skos:prefLabel "nuage moléculaire"@fr, "molecular cloud"@en ;
  a skos:Concept ;
  skos:exactMatch <https://www.daviddarling.info/encyclopedia/M/molcloud.html>, <https://fr.wikipedia.org/wiki/Nuage_mol%C3%A9culaire> ;
  skos:definition "En astronomie, les nuages moléculaires sont des nébuleuses interstellaires qui ont une densité et une taille suffisante pour permettre la formation d'hydrogène moléculaire, H2. Cependant, il est difficile de le détecter et le moyen le plus employée pour tracer les molécules de H2 est l'utilisation du monoxyde de carbone CO. En effet, le rapport entre la luminosité du CO et la masse de H2 est presque constant. Cependant, l'utilisation du CO comme traceur de H2 par ailleurs invisible, pose encore de nombreuses questions fondamentales, notamment, comment lier l'évolution d'un nuage moléculaire à l'évolution d'une galaxie dans son ensemble. (Wikipedia, L'Encylopédie Libre, <a href=\"https://fr.wikipedia.org/wiki/Nuage_mol%C3%A9culaire\" target=\"_blank\">https://fr.wikipedia.org/wiki/Nuage_mol%C3%A9culaire</a>)"@fr, "A molecular cloud is a cold, dense interstellar cloud that contains a high fraction of molecules, of which close to 200 different types have been discovered in space (see interstellar molecules). It is widely believed that the relatively high density of dust particles in these clouds plays an important role in the formation and protection of the molecules. The emission of molecular lines often shows several distinct intensity peaks, each representing individual clumps or clouds of gas and dust in a region that may extend in total between about 15 and 600 light-years across and is often associated with T Tauri stars – young, pre-main-sequence stars – and also hot massive stars and the ionized gas around them. Two distinct types, of molecular cloud are known, both associated with star formation: giant molecular clouds and dwarf (or small) molecular clouds.  (Encyclopedia of Science, by David Darling, <a href=\"https://www.daviddarling.info/encyclopedia/M/molcloud.html\" target=\"_blank\">https://www.daviddarling.info/encyclopedia/M/molcloud.html</a>)"@en ;
  dc:modified "2022-10-10"^^xsd:date ;
  skos:inScheme mdl: .