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<skos:prefLabel xml:lang="en">Halley comet</skos:prefLabel>
<skos:prefLabel xml:lang="fr">comète de Halley</skos:prefLabel>
<skos:definition xml:lang="en">Halley's Comet or Comet Halley, officially designated 1P/Halley, is a short-period comet visible from Earth every 75–79 years. Halley is the only known short-period comet that is regularly visible to the naked eye from Earth, and thus the only naked-eye comet that can appear twice in a human lifetime.] Halley last appeared in the inner parts of the Solar System in 1986 and will next appear in mid-2061. Halley's periodic returns to the inner Solar System have been observed and recorded by astronomers around the world since at least 240 BC. But it was not until 1705 that the English astronomer Edmond Halley understood that these appearances were reappearances of the same comet. As a result of this discovery, the comet is named after Halley. (Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Halley%27s_Comet )</skos:definition>
<skos:definition xml:lang="fr">La comète de Halley (désignation officielle 1P/Halley) est la plus connue de toutes les comètes. Son demi grand axe est de 17,9 unités astronomiques (soit environ 2,7 milliards de kilomètres), son excentricité est de 0,97 et sa période est de 76 ans. Sa distance au périhélie est de 0,59 unité astronomique et sa distance à l'aphélie est de 35,3 unités astronomiques. Il s'agit d'une comète à courte période. (Wikipedia, L'Encylopédie Libre, https://fr.wikipedia.org/wiki/1P/Halley )</skos:definition>
<skos:hiddenLabel xml:lang="fr">Comète Halley</skos:hiddenLabel>
<skos:hiddenLabel xml:lang="fr">comètes de Halley</skos:hiddenLabel>
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<skos:prefLabel xml:lang="en">Halley comet</skos:prefLabel>
<skos:prefLabel xml:lang="fr">comète de Halley</skos:prefLabel>
<skos:definition xml:lang="en">Halley's Comet or Comet Halley, officially designated 1P/Halley, is a short-period comet visible from Earth every 75–79 years. Halley is the only known short-period comet that is regularly visible to the naked eye from Earth, and thus the only naked-eye comet that can appear twice in a human lifetime.] Halley last appeared in the inner parts of the Solar System in 1986 and will next appear in mid-2061. Halley's periodic returns to the inner Solar System have been observed and recorded by astronomers around the world since at least 240 BC. But it was not until 1705 that the English astronomer Edmond Halley understood that these appearances were reappearances of the same comet. As a result of this discovery, the comet is named after Halley. (Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Halley%27s_Comet )</skos:definition>
<skos:definition xml:lang="fr">La comète de Halley (désignation officielle 1P/Halley) est la plus connue de toutes les comètes. Son demi grand axe est de 17,9 unités astronomiques (soit environ 2,7 milliards de kilomètres), son excentricité est de 0,97 et sa période est de 76 ans. Sa distance au périhélie est de 0,59 unité astronomique et sa distance à l'aphélie est de 35,3 unités astronomiques. Il s'agit d'une comète à courte période. (Wikipedia, L'Encylopédie Libre, https://fr.wikipedia.org/wiki/1P/Halley )</skos:definition>
<skos:hiddenLabel xml:lang="fr">Comète Halley</skos:hiddenLabel>
<skos:hiddenLabel xml:lang="fr">comètes de Halley</skos:hiddenLabel>
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