@prefix mdl: <http://data.loterre.fr/ark:/67375/MDL> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .

mdl:-X6ZDGFKB-D
  skos:prefLabel "matière interstellaire"@fr, "interstellar matter"@en ;
  a skos:Concept ;
  skos:narrower mdl:-NNP9DXCN-S .

mdl:-S93X4K8J-M
  skos:prefLabel "raie Lyman bêta"@fr, "Lyman-beta line"@en ;
  a skos:Concept ;
  skos:related mdl:-NNP9DXCN-S .

mdl:-FWXBS9GN-R
  skos:prefLabel "Paschen lines"@en, "raie de Paschen"@fr ;
  a skos:Concept ;
  skos:related mdl:-NNP9DXCN-S .

mdl:-NWS1S50W-6
  skos:prefLabel "raie de Balmer"@fr, "Balmer line"@en ;
  a skos:Concept ;
  skos:related mdl:-NNP9DXCN-S .

mdl: a skos:ConceptScheme .
mdl:-NNP9DXCN-S
  skos:definition "Non-ionized atomic hydrogen gas which constitutes an important component of the interstellar medium, accounting for perhaps half its mass, even though its density is very low. Its radio emission 21-centimeter line has made it possible to map the distribution of neutral hydrogen in the spiral arms of our own Galaxy and other nearby galaxies.  (An Etymological Dictionary of Astronomy and Astrophysics, by M. Heydari-Malayeri, <a href=\"https://dictionary.obspm.fr/index.php?formSearchTextfield=neutral+hydrogen&formSubmit=Search&showAll=1\" target=\"_blank\">https://dictionary.obspm.fr/index.php?formSearchTextfield=neutral+hydrogen&formSubmit=Search&showAll=1</a>)"@en, "Le gaz d'hydrogène atomique non ionisé qui constitue une composante importante du milieu interstellaire, représentant peut-être la moitié de sa masse, même si sa densité est très faible. Sa raie d'émission radio à 21 centimètres a permis de cartographier la distribution de l'hydrogène neutre dans les bras spiraux de notre propre Galaxie et d'autres galaxies voisines.  (traduit depuis \"An Etymological Dictionary of Astronomy and Astrophysics, by M. Heydari-Malayeri\", <a href=\"https://dictionary.obspm.fr/index.php?formSearchTextfield=neutral+hydrogen&formSubmit=Search&showAll=1\" target=\"_blank\">https://dictionary.obspm.fr/index.php?formSearchTextfield=neutral+hydrogen&formSubmit=Search&showAll=1</a>)"@fr ;
  skos:broader mdl:-X6ZDGFKB-D ;
  skos:hiddenLabel "atomes neutres d'hydrogènes"@fr, "neutral hydrogen atoms"@en ;
  a skos:Concept ;
  skos:related mdl:-FWXBS9GN-R, mdl:-BL092VG4-L, mdl:-TR51S08S-8, mdl:-S93X4K8J-M, mdl:-NWS1S50W-6, mdl:-MD32XPCQ-9 ;
  skos:prefLabel "atome neutre d'hydrogène"@fr, "neutral hydrogen atom"@en ;
  skos:exactMatch <https://dictionary.obspm.fr/index.php?formSearchTextfield=neutral+hydrogen&formSubmit=Search&showAll=1> ;
  skos:inScheme mdl: .

mdl:-BL092VG4-L
  skos:prefLabel "Lyman-alpha line"@en, "raie Lyman alpha"@fr ;
  a skos:Concept ;
  skos:related mdl:-NNP9DXCN-S .

mdl:-MD32XPCQ-9
  skos:prefLabel "raie de Lyman"@fr, "Lyman line"@en ;
  a skos:Concept ;
  skos:related mdl:-NNP9DXCN-S .

mdl:-TR51S08S-8
  skos:prefLabel "raie à 21 cm"@fr, "21-centimeter line"@en ;
  a skos:Concept ;
  skos:related mdl:-NNP9DXCN-S .