@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:-RQJ1MLS6-X
  skos:prefLabel "étoile de type bêta Canis Majoris"@fr, "beta Canis Majoris star"@en ;
  a skos:Concept ;
  skos:broader mdl:-HJ5S1SWZ-8 .

mdl:-PG51HS2D-7
  skos:prefLabel "courbe de lumière"@fr, "light curve"@en ;
  a skos:Concept ;
  skos:broader mdl:-HJ5S1SWZ-8 .

mdl:-LBW2P8XK-D
  skos:prefLabel "étoile de type gamma Doradus"@fr, "gamma Doradus star"@en ;
  a skos:Concept ;
  skos:broader mdl:-HJ5S1SWZ-8 .

mdl:-Z3TWVT2K-L
  skos:prefLabel "étoile variable cataclysmique"@fr, "cataclysmic star"@en ;
  a skos:Concept ;
  skos:broader mdl:-HJ5S1SWZ-8 .

mdl:-T5L11FXM-G
  skos:prefLabel "irregular star"@en, "étoile variable irrégulière"@fr ;
  a skos:Concept ;
  skos:broader mdl:-HJ5S1SWZ-8 .

mdl:-TCG3XNCN-X
  skos:prefLabel "étoile variable à courte période"@fr, "short-period star"@en ;
  a skos:Concept ;
  skos:broader mdl:-HJ5S1SWZ-8 .

mdl:-GV6XW9DW-T
  skos:prefLabel "luminous blue variable star"@en, "étoile variable bleue lumineuse"@fr ;
  a skos:Concept ;
  skos:broader mdl:-HJ5S1SWZ-8 .

mdl:-CRSPPFTS-F
  skos:prefLabel "étoile soupçonnée variable"@fr, "suspected variable star"@en ;
  a skos:Concept ;
  skos:broader mdl:-HJ5S1SWZ-8 .

mdl:-XPWQCCHW-P
  skos:prefLabel "flare star"@en, "étoile à sursauts"@fr ;
  a skos:Concept ;
  skos:broader mdl:-HJ5S1SWZ-8 .

mdl:-PH6MZ9KB-3
  skos:prefLabel "nova"@fr, "nova"@en ;
  a skos:Concept ;
  skos:broader mdl:-HJ5S1SWZ-8 .

mdl:-XC2SH74H-W
  skos:prefLabel "étoile variable à longue période"@fr, "long-period star"@en ;
  a skos:Concept ;
  skos:broader mdl:-HJ5S1SWZ-8 .

mdl:-HTZPVPNG-S
  skos:prefLabel "étoile variable pulsante"@fr, "pulsating star"@en ;
  a skos:Concept ;
  skos:broader mdl:-HJ5S1SWZ-8 .

mdl:-B6B6Q1HD-3
  skos:prefLabel "supernova"@fr, "supernova"@en ;
  a skos:Concept ;
  skos:broader mdl:-HJ5S1SWZ-8 .

mdl:-K3ZRP60W-M
  skos:prefLabel "étoile variable éruptive"@fr, "eruptive star"@en ;
  a skos:Concept ;
  skos:broader mdl:-HJ5S1SWZ-8 .

mdl:-HJ5S1SWZ-8
  skos:definition "A variable star is a star that changes in brightness. Variable stars fall into two general categories: intrinsic variables, in which physical changes, such as pulsations or eruptions, are involved, and extrinsic variables, in which the light output fluctuates due to eclipses or stellar rotation. Further classification is complex; originally it was based on a star's light curve, amplitude, and periodicity (or lack of it), but is now more closely linked to the physical processes underlying the variability. The standard reference for classification is the General Catalogue of Variable Stars. Specific types of variable star are often named after a prototype. Additionally, a star may belong to more than one category of variable.   (Encyclopedia of Science, by David Darling, <a href=\"https://www.daviddarling.info/encyclopedia/V/variablestar.html\" target=\"_blank\">https://www.daviddarling.info/encyclopedia/V/variablestar.html</a>)"@en, "En astronomie, une étoile variable ou, par ellipse, une variable — anciennement, une étoile changeante ou une changeante — est une étoile dont l'éclat — la luminosité — varie au cours de périodes plus ou moins longues (on parle à ce titre de variabilité stellaire). Alors que la plupart des étoiles sont de luminosité presque constante, comme le Soleil qui ne possède pratiquement pas de variation mesurable (environ 0,1 % sur un cycle de 11 ans), la luminosité de certaines étoiles varie de façon perceptible pendant des périodes de temps beaucoup plus courtes. (Wikipedia, L'Encylopédie Libre, <a href=\"https://fr.wikipedia.org/wiki/%C3%89toile_variable\" target=\"_blank\">https://fr.wikipedia.org/wiki/%C3%89toile_variable</a>)"@fr ;
  dc:modified "2022-10-06"^^xsd:date ;
  skos:prefLabel "étoile variable"@fr, "variable star"@en ;
  skos:exactMatch <https://fr.wikipedia.org/wiki/%C3%89toile_variable>, <https://www.daviddarling.info/encyclopedia/V/variablestar.html> ;
  skos:narrower mdl:-HTZPVPNG-S, mdl:-Z3TWVT2K-L, mdl:-PH6MZ9KB-3, mdl:-T5L11FXM-G, mdl:-RQJ1MLS6-X, mdl:-TCG3XNCN-X, mdl:-XPWQCCHW-P, mdl:-CRSPPFTS-F, mdl:-F8M7008D-V, mdl:-LBW2P8XK-D, mdl:-GV6XW9DW-T, mdl:-XC2SH74H-W, mdl:-PG51HS2D-7, mdl:-K3ZRP60W-M, mdl:-B6B6Q1HD-3 ;
  skos:broader mdl:-BRT4FZ8L-J ;
  skos:related mdl:-K0272Z66-T ;
  skos:hiddenLabel "étoiles variables"@fr, "variable stars"@en ;
  skos:inScheme mdl: ;
  a skos:Concept .

mdl:-BRT4FZ8L-J
  skos:prefLabel "type stellaire"@fr, "stellar type"@en ;
  a skos:Concept ;
  skos:narrower mdl:-HJ5S1SWZ-8 .

mdl:-K0272Z66-T
  skos:prefLabel "binary star"@en, "binaire"@fr ;
  a skos:Concept ;
  skos:related mdl:-HJ5S1SWZ-8 .

mdl:-F8M7008D-V
  skos:prefLabel "étoile de type BY Draconis"@fr, "BY Draconis star"@en ;
  a skos:Concept ;
  skos:broader mdl:-HJ5S1SWZ-8 .