{"id":1914,"date":"2018-07-31T11:44:58","date_gmt":"2018-07-31T09:44:58","guid":{"rendered":"https:\/\/www.stelvision.com\/astro\/?p=1914"},"modified":"2025-10-09T11:53:58","modified_gmt":"2025-10-09T09:53:58","slug":"pollution-lumineuse-un-fleau-a-combattre","status":"publish","type":"post","link":"https:\/\/www.stelvision.com\/astro\/pollution-lumineuse-un-fleau-a-combattre\/","title":{"rendered":"Pollution lumineuse&nbsp;: un fl\u00e9au \u00e0 combattre"},"content":{"rendered":"\n<p class=\"chapo\">La pollution lumineuse li\u00e9es aux \u00e9clairages artificiels emp\u00eache d&rsquo;observer le ciel nocturne, nuit \u00e0 la biodiversit\u00e9, et a des cons\u00e9quences sur la sant\u00e9 humaine. Voici notre dossier sur le sujet pour mieux en comprendre les nombreux enjeux.<\/p>\n\n\n<div class=\"wp-block-image size-large wp-image-1935\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"1024\" height=\"547\" src=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/monde_de_nuit_credit_Nasa_NOAA-1024x547.jpg\" alt=\"Planisph\u00e8re repr\u00e9sentant les lumi\u00e8res artificielles qui illuminent la surface de la Terre la nuit.\" class=\"wp-image-1935\" srcset=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/monde_de_nuit_credit_Nasa_NOAA-1024x547.jpg 1024w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/monde_de_nuit_credit_Nasa_NOAA-300x160.jpg 300w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/monde_de_nuit_credit_Nasa_NOAA-768x410.jpg 768w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/monde_de_nuit_credit_Nasa_NOAA-1140x609.jpg 1140w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/monde_de_nuit_credit_Nasa_NOAA-750x401.jpg 750w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/monde_de_nuit_credit_Nasa_NOAA-570x305.jpg 570w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/monde_de_nuit_credit_Nasa_NOAA-368x197.jpg 368w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/monde_de_nuit_credit_Nasa_NOAA-270x144.jpg 270w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/monde_de_nuit_credit_Nasa_NOAA-1000x534.jpg 1000w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/monde_de_nuit_credit_Nasa_NOAA.jpg 1868w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\"><strong>Le monde de nuit. <\/strong><small>Cr\u00e9dit&nbsp;: Nasa\/NOAA<\/small><\/figcaption><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\">Qu&rsquo;est-ce que la pollution lumineuse&nbsp;?<\/h2>\n\n\n\n<p>Tous les amoureux du ciel en ont d\u00e9j\u00e0 fait l&rsquo;exp\u00e9rience un jour. Lever les yeux pour n&rsquo;apercevoir qu&rsquo;un ciel voil\u00e9, jauni, sur lequel se dessinent au mieux V\u00e9nus, V\u00e9ga et quelques rares cons\u0153urs brillantes. Loin de l\u00e0 le ciel sombre peupl\u00e9 de milliers d&rsquo;\u00e9toiles au sein desquelles se distingue la Voie lact\u00e9e. En cause&nbsp;: l&rsquo;\u00e9mission de lumi\u00e8re artificielle ext\u00e9rieure.<\/p>\n\n\n\n<p>Bien que 20&nbsp;% de la surface du globe soit touch\u00e9e par la pollution lumineuse, pr\u00e8s de 80&nbsp;% de la population mondiale ne conna\u00eet pas la nuit noire&nbsp;! <em>\u00ab\u00a0En France par exemple, il n&rsquo;existe quasiment plus aucun endroit o\u00f9 le ciel est noir, explique&nbsp;S\u00e9bastien Vauclair, cofondateur du bureau d&rsquo;\u00e9tudes <a href=\"https:\/\/darkskylab.com\">Dark Sky Lab<\/a> sp\u00e9cialis\u00e9 dans l&rsquo;expertise scientifique de la pollution lumineuse et de ses cons\u00e9quences, et g\u00e9rant du magasin d&rsquo;astronomie La Clef des \u00c9toiles en r\u00e9gion toulousaine. M\u00eame au Pic du Midi, il existe une pollution lumineuse&nbsp;!\u00a0\u00bb. <\/em>En&nbsp;2018, pour voir les \u00e9toiles il faut s&rsquo;\u00e9loigner de plusieurs dizaines de kilom\u00e8tres des grandes villes, o\u00f9 seules quelques pourcents des 3&nbsp;000 \u00e9toiles observables en th\u00e9orie sont visibles.<\/p>\n\n\n<div class=\"wp-block-image size-large wp-image-1923\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"1024\" height=\"441\" src=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/monde_lumineux_credit_Institut_italien_de_la_technologie_et_de_la_science_de_la_pollution_lumineuse_ISTIL-1024x441.jpg\" alt=\"Planisph\u00e8re qui repr\u00e9sente les \u00e9mission lumineuses des aires urbaines de nuit. \" class=\"wp-image-1923\" srcset=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/monde_lumineux_credit_Institut_italien_de_la_technologie_et_de_la_science_de_la_pollution_lumineuse_ISTIL-1024x441.jpg 1024w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/monde_lumineux_credit_Institut_italien_de_la_technologie_et_de_la_science_de_la_pollution_lumineuse_ISTIL-300x129.jpg 300w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/monde_lumineux_credit_Institut_italien_de_la_technologie_et_de_la_science_de_la_pollution_lumineuse_ISTIL-768x331.jpg 768w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/monde_lumineux_credit_Institut_italien_de_la_technologie_et_de_la_science_de_la_pollution_lumineuse_ISTIL-750x323.jpg 750w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/monde_lumineux_credit_Institut_italien_de_la_technologie_et_de_la_science_de_la_pollution_lumineuse_ISTIL-570x245.jpg 570w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/monde_lumineux_credit_Institut_italien_de_la_technologie_et_de_la_science_de_la_pollution_lumineuse_ISTIL-368x158.jpg 368w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/monde_lumineux_credit_Institut_italien_de_la_technologie_et_de_la_science_de_la_pollution_lumineuse_ISTIL-270x116.jpg 270w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/monde_lumineux_credit_Institut_italien_de_la_technologie_et_de_la_science_de_la_pollution_lumineuse_ISTIL-1000x430.jpg 1000w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/monde_lumineux_credit_Institut_italien_de_la_technologie_et_de_la_science_de_la_pollution_lumineuse_ISTIL.jpg 1113w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\"><strong>Intensit\u00e9 lumineuse issue des \u00e9clairages artificiels de nuit et cons\u00e9quences sur la vision nocturne.<\/strong><small> Cr\u00e9dit&nbsp;: Institut italien de la technologie et de la science de la pollution lumineuse<\/small><\/figcaption><\/figure>\n<\/div>\n\n\n<p>En outre, le ph\u00e9nom\u00e8ne n&rsquo;impacte pas seulement la communaut\u00e9 des astronomes. En d\u00e9gradant les conditions de vie des esp\u00e8ces v\u00e9g\u00e9tales et animales, y compris celles de l&rsquo;Homme, il a une incidence sur l&rsquo;environnement et sa biodiversit\u00e9.<\/p>\n\n\n\n<p>Comme l&rsquo;ont montr\u00e9 les Am\u00e9ricains Jeffrey Hall, Michael Rosbash et Michael Young, laur\u00e9ats du prix Nobel de physiologie et de m\u00e9decine en&nbsp;2017, plantes, animaux et \u00eatres humains adaptent leur rythme biologique pour \u00eatre synchronis\u00e9s avec les r\u00e9volutions de la Terre autour du Soleil. Ce ph\u00e9nom\u00e8ne se nomme le rythme circadien. Les v\u00e9g\u00e9taux sont donc n\u00e9cessairement perturb\u00e9s par un \u00e9clairage en continu. Les arbres par exemple, subissent un retardement de la perte des feuilles. Les fleurs elles, restent ferm\u00e9es pour certaines de par l&rsquo;exc\u00e8s d&rsquo;\u00e9clairage, et s&rsquo;auto-f\u00e9condent ce qui r\u00e9duit le brassage g\u00e9n\u00e9tique.<\/p>\n\n\n<div class=\"wp-block-image size-large wp-image-1960\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"1024\" height=\"440\" src=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/illustration_pollution_nocturne_credit_France_nature_environnement_Dark_Sky_Lab_R\u00e9gion_Midi_Pyr\u00e9n\u00e9es-1024x440.jpg\" alt=\"Sch\u00e9ma repr\u00e9sentant les diff\u00e9rentes plantes et animaux touch\u00e9s par la pollution lumineuse.\" class=\"wp-image-1960\" srcset=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/illustration_pollution_nocturne_credit_France_nature_environnement_Dark_Sky_Lab_R\u00e9gion_Midi_Pyr\u00e9n\u00e9es-1024x440.jpg 1024w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/illustration_pollution_nocturne_credit_France_nature_environnement_Dark_Sky_Lab_R\u00e9gion_Midi_Pyr\u00e9n\u00e9es-300x129.jpg 300w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/illustration_pollution_nocturne_credit_France_nature_environnement_Dark_Sky_Lab_R\u00e9gion_Midi_Pyr\u00e9n\u00e9es-768x330.jpg 768w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/illustration_pollution_nocturne_credit_France_nature_environnement_Dark_Sky_Lab_R\u00e9gion_Midi_Pyr\u00e9n\u00e9es-1140x489.jpg 1140w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/illustration_pollution_nocturne_credit_France_nature_environnement_Dark_Sky_Lab_R\u00e9gion_Midi_Pyr\u00e9n\u00e9es-750x322.jpg 750w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/illustration_pollution_nocturne_credit_France_nature_environnement_Dark_Sky_Lab_R\u00e9gion_Midi_Pyr\u00e9n\u00e9es-570x245.jpg 570w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/illustration_pollution_nocturne_credit_France_nature_environnement_Dark_Sky_Lab_R\u00e9gion_Midi_Pyr\u00e9n\u00e9es-368x158.jpg 368w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/illustration_pollution_nocturne_credit_France_nature_environnement_Dark_Sky_Lab_R\u00e9gion_Midi_Pyr\u00e9n\u00e9es-270x116.jpg 270w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/illustration_pollution_nocturne_credit_France_nature_environnement_Dark_Sky_Lab_R\u00e9gion_Midi_Pyr\u00e9n\u00e9es-1000x429.jpg 1000w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/illustration_pollution_nocturne_credit_France_nature_environnement_Dark_Sky_Lab_R\u00e9gion_Midi_Pyr\u00e9n\u00e9es.jpg 1414w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\"><strong>Les esp\u00e8ces touch\u00e9es par la pollution lumineuse.<\/strong> <small>Cr\u00e9dit&nbsp;: France Nature Environnement Midi-Pyr\u00e9n\u00e9es\/Dark Sky Lab\/R\u00e9gion Midi-Pyr\u00e9n\u00e9es<\/small><\/figcaption><\/figure>\n<\/div>\n\n\n<p>Les animaux qui vivent la nuit sont aussi impact\u00e9s. Un ph\u00e9nom\u00e8ne massif, quand on sait que plus de 70&nbsp;% des esp\u00e8ces sont partiellement ou exclusivement nocturnes&nbsp;! Et m\u00eame pour certaines lucifuges, c&rsquo;est-\u00e0-dire qu&rsquo;elles fuient instinctivement la lumi\u00e8re. D&rsquo;abord dans le ciel, les rapaces nocturnes sont \u00e9blouis. Les oiseaux migrateurs, priv\u00e9s de leurs \u00e9toiles-guides, sont d\u00e9vi\u00e9s de leur trajectoire. Les habitudes de chasse et d&rsquo;alimentation des chauves-souris sont perturb\u00e9es. Les insectes, quant \u00e0 eux, sont fr\u00e9n\u00e9tiquement attir\u00e9s par les lampadaires, en oublient de se nourrir ou finissent par s&rsquo;y br\u00fbler. Les signaux lumineux que s&rsquo;envoient les couples de lucioles ne font plus sens au milieu des \u00e9clairages artificiels&#8230;<\/p>\n\n\n\n<p>De leur c\u00f4t\u00e9, les mammif\u00e8res sont g\u00ean\u00e9s par les routes et ponts \u00e9clair\u00e9s qui nuisent \u00e0 leur mobilit\u00e9, en plus de perturber leur rythme circadien. Cervid\u00e9s, renards ou h\u00e9rissons \u00e9vitent la lumi\u00e8re des grands axes routiers et se confinent dans des espaces g\u00e9ographiques r\u00e9duits. Cons\u00e9quence&nbsp;: une r\u00e9duction de la mixit\u00e9 g\u00e9n\u00e9tique, et donc de la biodiversit\u00e9.<\/p>\n\n\n<div class=\"wp-block-image size-large wp-image-1953\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/herisson_libre_de_droits_credit_Katharina_Bartczak-1024x768.jpg\" alt=\"Un h\u00e9risson dans la nuit, \u00e9clair\u00e9 par une lumi\u00e8re artificielle au loin.\" class=\"wp-image-1953\" srcset=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/herisson_libre_de_droits_credit_Katharina_Bartczak-1024x768.jpg 1024w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/herisson_libre_de_droits_credit_Katharina_Bartczak-300x225.jpg 300w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/herisson_libre_de_droits_credit_Katharina_Bartczak-768x576.jpg 768w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/herisson_libre_de_droits_credit_Katharina_Bartczak-1140x855.jpg 1140w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/herisson_libre_de_droits_credit_Katharina_Bartczak-750x563.jpg 750w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/herisson_libre_de_droits_credit_Katharina_Bartczak-570x428.jpg 570w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/herisson_libre_de_droits_credit_Katharina_Bartczak-368x276.jpg 368w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/herisson_libre_de_droits_credit_Katharina_Bartczak-270x203.jpg 270w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/herisson_libre_de_droits_credit_Katharina_Bartczak-1000x750.jpg 1000w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/herisson_libre_de_droits_credit_Katharina_Bartczak.jpg 1280w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\"><strong>La pollution lumineuse perturbe les animaux nocturnes, comme le h\u00e9risson.<\/strong><small> Cr\u00e9dit&nbsp;: Katharina Bartczak<\/small><\/figcaption><\/figure>\n<\/div>\n\n\n<p>Sur les plages, les jeunes tortues ne ont plus attir\u00e9es par le reflet des astres sur l&rsquo;oc\u00e9an mais par les lumi\u00e8res de la ville&#8230; Reptiles, hermines, amphibiens, escargots&#8230; La liste est encore longue.<\/p>\n\n\n\n<p>Par ailleurs, pour S\u00e9bastien Vauclair&nbsp;: <em>\u00ab\u00a0Les cons\u00e9quences de la pollution lumineuse vont bien au-del\u00e0 de l&rsquo;impact sur les animaux. C&rsquo;est aussi un probl\u00e8me de sant\u00e9 publique\u00a0\u00bb. <\/em>Car la lumi\u00e8re intrusive dans nos maisons perturbe le sommeil, et notamment la production d&rsquo;hormones comme la m\u00e9latonine, li\u00e9e \u00e0 l&rsquo;endormissement.<\/p>\n\n\n\n<p>Pire encore, de plus en plus d&rsquo;\u00e9clairages sont remplac\u00e9s par des LEDs. Plus \u00e9conomes en \u00e9nergie, ils \u00e9mettent de la lumi\u00e8re bleue (longueurs d&rsquo;onde comprises entre 380 et 500\u00a0nm), comme les \u00e9crans d&rsquo;ordinateurs et de t\u00e9l\u00e9phones portables. Les publications se multiplient sur les cons\u00e9quences n\u00e9fastes de cette lumi\u00e8re bleue, interpr\u00e9t\u00e9e par le cerveau comme la lumi\u00e8re du jour. Une <a href=\"https:\/\/ehp.niehs.nih.gov\/doi\/10.1289\/EHP1837\">\u00e9tude europ\u00e9enne men\u00e9e par le Barcelona Institute for Global Health<\/a> en 2018 a \u00e9tabli un lien entre l&rsquo;exposition nocturne \u00e0 la lumi\u00e8re bleue et un risque accru de cancer du sein et de la prostate.<\/p>\n\n\n<div class=\"wp-block-image size-full wp-image-1962\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"425\" height=\"425\" src=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/lampadaire_solaire_LED_credit_LEDSOLAR.jpg\" alt=\"Illustration d'un lampadaire \u00e0 LED en fonctionnement de nuit. Il \u00e9met de la lumi\u00e8re bleue nocive pour le sommeil.\" class=\"wp-image-1962\" srcset=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/lampadaire_solaire_LED_credit_LEDSOLAR.jpg 425w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/lampadaire_solaire_LED_credit_LEDSOLAR-150x150.jpg 150w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/lampadaire_solaire_LED_credit_LEDSOLAR-300x300.jpg 300w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/lampadaire_solaire_LED_credit_LEDSOLAR-368x368.jpg 368w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/lampadaire_solaire_LED_credit_LEDSOLAR-270x270.jpg 270w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/lampadaire_solaire_LED_credit_LEDSOLAR-62x62.jpg 62w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/lampadaire_solaire_LED_credit_LEDSOLAR-100x100.jpg 100w\" sizes=\"(max-width: 425px) 100vw, 425px\" \/><figcaption class=\"wp-element-caption\"><strong>De plus en plus de lampadaires sont \u00e0 LEDs et \u00e9mettent de la lumi\u00e8re bleue nocive pour le sommeil.<\/strong><small> Cr\u00e9dit&nbsp;: LED &amp; SOLAR<\/small><\/figcaption><\/figure>\n<\/div>\n\n\n<p>Enfin, la pollution lumineuse s&rsquo;apparente \u00e0 un probl\u00e8me soci\u00e9tal. <em>\u00ab\u00a0Certains citadins n&rsquo;ont jamais vu la Voie lact\u00e9e&nbsp;! Coup\u00e9s de leur environnement, ils ne s&rsquo;interrogent pas sur ce qui les entoure. Pourtant, n&rsquo;est-il pas fondamental de se questionner sur l&rsquo;origine de notre plan\u00e8te, du Syst\u00e8me solaire, de l&rsquo;Univers&nbsp;?\u00a0\u00bb.<\/em><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Pourquoi \u00e9claire-t-on&nbsp;?<\/h2>\n\n\n\n<p>\u00c0 l&rsquo;heure de r\u00e9aliser des \u00e9conomies g\u00e9n\u00e9rales, l&rsquo;\u00e9clairage public des communes fran\u00e7aises repr\u00e9sente pourtant encore 48&nbsp;% de leurs d\u00e9penses en \u00e9lectricit\u00e9. Ce montant \u00e9quivaut \u00e0 environ 4&nbsp;millions d&rsquo;euros par an pour une ville comme Toulouse&nbsp;! Alors pourquoi tant d&rsquo;\u00e9clairage \u00e0 des horaires o\u00f9 la plupart d&rsquo;entre nous r\u00eave dans les bras de Morph\u00e9e&nbsp;?<\/p>\n\n\n\n<p>D&rsquo;abord parce que la lumi\u00e8re nous rassure. Personne ne souhaiterait en effet, comme au Moyen-\u00c2ge, que les rues se transforment en coupe-gorges la nuit. En outre, notre mode de vie n\u00e9cessite beaucoup de lumi\u00e8re&nbsp;: illuminations de No\u00ebl, f\u00eates foraines, concerts, restaurants&#8230; Imaginez-vous le Times Square new-yorkais plong\u00e9 dans l&rsquo;obscurit\u00e9&nbsp;?<\/p>\n\n\n<div class=\"wp-block-image size-large wp-image-1972\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"1024\" height=\"433\" src=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/surexposition_lumiere_credit_France_nature_environnement_Dark_Sky_Lab_R\u00e9gion_Midi_Pyr\u00e9n\u00e9es-1024x433.jpg\" alt=\"Sch\u00e9ma repr\u00e9sentant une jeune fille dans sa chambre, expos\u00e9e la cinq types de pollutions lumineuses.\" class=\"wp-image-1972\" srcset=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/surexposition_lumiere_credit_France_nature_environnement_Dark_Sky_Lab_R\u00e9gion_Midi_Pyr\u00e9n\u00e9es-1024x433.jpg 1024w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/surexposition_lumiere_credit_France_nature_environnement_Dark_Sky_Lab_R\u00e9gion_Midi_Pyr\u00e9n\u00e9es-300x127.jpg 300w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/surexposition_lumiere_credit_France_nature_environnement_Dark_Sky_Lab_R\u00e9gion_Midi_Pyr\u00e9n\u00e9es-768x324.jpg 768w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/surexposition_lumiere_credit_France_nature_environnement_Dark_Sky_Lab_R\u00e9gion_Midi_Pyr\u00e9n\u00e9es-1140x482.jpg 1140w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/surexposition_lumiere_credit_France_nature_environnement_Dark_Sky_Lab_R\u00e9gion_Midi_Pyr\u00e9n\u00e9es-750x317.jpg 750w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/surexposition_lumiere_credit_France_nature_environnement_Dark_Sky_Lab_R\u00e9gion_Midi_Pyr\u00e9n\u00e9es-570x241.jpg 570w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/surexposition_lumiere_credit_France_nature_environnement_Dark_Sky_Lab_R\u00e9gion_Midi_Pyr\u00e9n\u00e9es-368x155.jpg 368w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/surexposition_lumiere_credit_France_nature_environnement_Dark_Sky_Lab_R\u00e9gion_Midi_Pyr\u00e9n\u00e9es-270x114.jpg 270w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/surexposition_lumiere_credit_France_nature_environnement_Dark_Sky_Lab_R\u00e9gion_Midi_Pyr\u00e9n\u00e9es-1000x422.jpg 1000w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/surexposition_lumiere_credit_France_nature_environnement_Dark_Sky_Lab_R\u00e9gion_Midi_Pyr\u00e9n\u00e9es.jpg 1418w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\"><strong>Cinq types de pollution lumineuse&nbsp;: (1)&nbsp;\u00e9clairage ext\u00e9rieur, (2)&nbsp;veilleuse, (3)&nbsp;lumi\u00e8re bleue, (4)&nbsp;radio-r\u00e9veil et (5)&nbsp;m\u00e9tiers au rythme chamboul\u00e9 (pilote, infirmier&#8230;).<\/strong> <small>Cr\u00e9dit&nbsp;: France Nature Environnement Midi-Pyr\u00e9n\u00e9es\/Dark Sky Lab\/R\u00e9gion Midi-Pyr\u00e9n\u00e9es<\/small><\/figcaption><\/figure>\n<\/div>\n\n\n<p>Ainsi, entre les lumi\u00e8res ext\u00e9rieures et les radio-r\u00e9veils, ordinateurs et veilleuses dans nos chambres, 62&nbsp;% de la population fran\u00e7aise sont expos\u00e9s \u00e0 la pollution lumineuse; alors que 84&nbsp;% ont l&rsquo;impression de ne pas y \u00eatre soumis.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Des solutions pour les astronomes<\/h2>\n\n\n\n<p>La pollution lumineuse est la plus insidieuse de toutes les pollutions, mais c&rsquo;est aussi celle qui se combat (en th\u00e9orie) le plus facilement&nbsp;! <em>\u00ab\u00a0C&rsquo;est dans les ann\u00e9es&nbsp;1970 que les professionnels de l&rsquo;astronomie ont commenc\u00e9 \u00e0 ressentir la g\u00eane des \u00e9clairages artificiels dans leur travail, explique S\u00e9bastien Vauclair. Ils ont donc d\u00e9cid\u00e9 d&rsquo;installer les <a href=\"https:\/\/www.stelvision.com\/astro\/les-grands-observatoires-terrestres\/\">grands observatoires terrestres<\/a> dans des lieux isol\u00e9s des villes, souvent en haute altitude\u00a0\u00bb.<\/em><\/p>\n\n\n<div class=\"wp-block-image size-large wp-image-1978\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"1024\" height=\"580\" src=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/Keck_Mauna_Kea_summit_credit_Keck_observatory-1024x580.jpg\" alt=\"Vue de nuit de l'Observatoire du Mont Mauna Kea \u00e0 Hawa\u00ef, \u00e0 4145 m d'altitude, sous un ciel parsem\u00e9 d'\u00e9toiles.\" class=\"wp-image-1978\" srcset=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/Keck_Mauna_Kea_summit_credit_Keck_observatory-1024x580.jpg 1024w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/Keck_Mauna_Kea_summit_credit_Keck_observatory-300x170.jpg 300w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/Keck_Mauna_Kea_summit_credit_Keck_observatory-768x435.jpg 768w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/Keck_Mauna_Kea_summit_credit_Keck_observatory-1140x646.jpg 1140w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/Keck_Mauna_Kea_summit_credit_Keck_observatory-750x425.jpg 750w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/Keck_Mauna_Kea_summit_credit_Keck_observatory-570x323.jpg 570w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/Keck_Mauna_Kea_summit_credit_Keck_observatory-368x209.jpg 368w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/Keck_Mauna_Kea_summit_credit_Keck_observatory-270x153.jpg 270w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/Keck_Mauna_Kea_summit_credit_Keck_observatory-1000x567.jpg 1000w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/Keck_Mauna_Kea_summit_credit_Keck_observatory.jpg 1200w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\"><strong>Observatoire du Mont Mauna Kea \u00e0 Hawa\u00ef, \u00e0 4145&nbsp;m d&rsquo;altitude.<\/strong><small> Cr\u00e9dit&nbsp;: Keck Observatory<\/small><\/figcaption><\/figure>\n<\/div>\n\n\n<p>Aujourd&rsquo;hui, l&rsquo;International Dark-Sky Association cr\u00e9\u00e9e en 1988 attribue le label R\u00e9serve internationale de ciel \u00e9toil\u00e9 (RICE) aux espaces publics ou priv\u00e9s de grande \u00e9tendue jouissant d\u2019un ciel nocturne d\u2019une qualit\u00e9 exceptionnelle. La r\u00e9serve doit comprendre une zone centrale o\u00f9 la noirceur naturelle est pr\u00e9serv\u00e9e au maximum et une r\u00e9gion p\u00e9riph\u00e9rique o\u00f9 les administrateurs publics, les individus et les entreprises reconnaissent l\u2019importance du ciel \u00e9toil\u00e9 et s\u2019engagent \u00e0 le prot\u00e9ger \u00e0 long terme.<\/p>\n\n\n\n<p>L\u2019association d\u00e9finit \u00e9galement les communaut\u00e9s et les parcs de ciel \u00e9toil\u00e9. C&rsquo;est la r\u00e9gion du mont M\u00e9gantic au Canada qui a servi de mod\u00e8le pour l\u2019\u00e9laboration des crit\u00e8res \u00e0 remplir pour l\u2019obtention de ces d\u00e9nominations. Mi-2018, une centaine de sites \u00e0 travers le monde en b\u00e9n\u00e9ficient. \u00c0 noter que le Pic du Midi est labellis\u00e9 RICE depuis 2013.<\/p>\n\n\n<div class=\"wp-block-image size-full wp-image-1981\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"960\" height=\"639\" src=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/Pic_du_Midi_credit_Pic_du_Midi.jpg\" alt=\"Observatoire du Pic du Midi \u00e0 l'aube, la neige est dans les tons violets. \" class=\"wp-image-1981\" srcset=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/Pic_du_Midi_credit_Pic_du_Midi.jpg 960w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/Pic_du_Midi_credit_Pic_du_Midi-300x200.jpg 300w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/Pic_du_Midi_credit_Pic_du_Midi-768x511.jpg 768w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/Pic_du_Midi_credit_Pic_du_Midi-750x499.jpg 750w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/Pic_du_Midi_credit_Pic_du_Midi-570x379.jpg 570w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/Pic_du_Midi_credit_Pic_du_Midi-368x245.jpg 368w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/Pic_du_Midi_credit_Pic_du_Midi-270x180.jpg 270w\" sizes=\"(max-width: 960px) 100vw, 960px\" \/><figcaption class=\"wp-element-caption\"><strong>Le site du Pic du Midi labellis\u00e9 R\u00e9serve international de ciel \u00e9toil\u00e9.<\/strong><small> Cr\u00e9dit&nbsp;: Pic du Midi<\/small><\/figcaption><\/figure>\n<\/div>\n\n\n<p>Enfin, l&rsquo;ONU envisage de consid\u00e9rer le ciel \u00e9toil\u00e9 comme \u00ab\u00a0patrimoine commun de l&rsquo;humanit\u00e9\u00a0\u00bb.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Un \u00e9clairage plus doux et raisonn\u00e9<\/h2>\n\n\n\n<p>Notre bien \u00eatre en ville la nuit passe par l&rsquo;\u00e9clairage, il n&rsquo;est donc pas question de supprimer tous les lampadaires. La solution, c&rsquo;est d&rsquo;\u00e9clairer mieux. <em>\u00ab\u00a0Tout simplement, orienter les \u00e9clairages publics vers le bas et non plus vers le haut permettrait de perdre moins de lumi\u00e8re et donc d&rsquo;\u00e9clairer plus efficacement, appuie S\u00e9bastien Vauclair. En r\u00e9duisant \u00e9galement l&rsquo;\u00e9clairage pour ne cibler que les lieux et horaires o\u00f9 la lumi\u00e8re est n\u00e9cessaire, avec des d\u00e9tecteurs de pr\u00e9sence par exemple, les grandes villes et communes rurales pourraient diminuer de 25&nbsp;% et 75&nbsp;% leur facture d&rsquo;\u00e9lectricit\u00e9\u00a0\u00bb<\/em>. \u00c0 noter qu&rsquo;aujourd&rsquo;hui, 40&nbsp;% de l&rsquo;\u00e9nergie produite pour s&rsquo;\u00e9clairer la nuit est perdue&#8230;<\/p>\n\n\n<div class=\"wp-block-image size-large wp-image-1984\">\n<figure class=\"aligncenter\"><img decoding=\"async\" width=\"1024\" height=\"460\" src=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/Screen-Shot-2018-07-20-at-10.22.26-1024x460.jpg\" alt=\"Sch\u00e9ma d'un \u00e9clairage plus doux et raisonn\u00e9 avec des abat-jours qui rabattent la lumi\u00e8re vers le bas.\" class=\"wp-image-1984\" srcset=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/Screen-Shot-2018-07-20-at-10.22.26-1024x460.jpg 1024w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/Screen-Shot-2018-07-20-at-10.22.26-300x135.jpg 300w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/Screen-Shot-2018-07-20-at-10.22.26-768x345.jpg 768w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/Screen-Shot-2018-07-20-at-10.22.26-1140x512.jpg 1140w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/Screen-Shot-2018-07-20-at-10.22.26-750x337.jpg 750w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/Screen-Shot-2018-07-20-at-10.22.26-570x256.jpg 570w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/Screen-Shot-2018-07-20-at-10.22.26-368x165.jpg 368w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/Screen-Shot-2018-07-20-at-10.22.26-270x121.jpg 270w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/Screen-Shot-2018-07-20-at-10.22.26-1000x449.jpg 1000w, https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2018\/07\/Screen-Shot-2018-07-20-at-10.22.26.jpg 1221w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\"><strong>Rabattre la lumi\u00e8re vers le bas et diminuer le nombre de lampadaires permettrait d&rsquo;\u00e9clairer plus pertinemment. <\/strong><small>Cr\u00e9dit&nbsp;: France Nature Environnement Midi-Pyr\u00e9n\u00e9es\/Dark Sky Lab\/R\u00e9gion Midi-Pyr\u00e9n\u00e9es<\/small><\/figcaption><\/figure>\n<\/div>\n\n\n<p>Baisser l&rsquo;intensit\u00e9 de la lumi\u00e8re apr\u00e8s 22h, installer des minuteurs, \u00e9teindre les lieux non fr\u00e9quent\u00e9s la nuit et ne pas illuminer les monuments en permanence sont aussi de bons r\u00e9flexes. De plus, 70&nbsp;% d&rsquo;\u00e9conomies d&rsquo;\u00e9nergie peuvent \u00eatre r\u00e9alis\u00e9es en rempla\u00e7ant les lampes \u00e0 vapeur de mercure par des technologies plus performantes. Attention toutefois \u00e0 utiliser des LEDs plus jaunes, pour limiter la lumi\u00e8re bleue.<\/p>\n\n\n\n<p>Pour finir, diff\u00e9rentes actions citoyennes permettent de lutter contre la pollution lumineuse. Par exemple, la Earth Hour consiste \u00e0 \u00e9teindre les lumi\u00e8res et d\u00e9brancher tous ses appareils \u00e9lectriques pendant une heure tous les derniers samedis du mois de mars. Cet \u00e9v\u00e9nement est organis\u00e9 par l&rsquo;ONG WWF et le quotidien australien <em>Sydney Morning Herald<\/em>.<\/p>\n\n\n\n<p>Enfin, gr\u00e2ce aux applications \u00ab\u00a0ciel en p\u00e9ril\u00a0\u00bb (Android) et \u00ab\u00a0Dark Sky Meter\u00a0\u00bb (iOS) mises en place par l&rsquo;International Dark-Sky Association, il est possible de mesurer la luminosit\u00e9 du ciel partout o\u00f9 l&rsquo;on se trouve. Les donn\u00e9es collect\u00e9es servent ensuite \u00e0 produire des cartes mondiales de la qualit\u00e9 du ciel. Le programme international \u00ab\u00a0Globe at night\u00a0\u00bb a les m\u00eames objectifs.<\/p>\n\n\n\n\t\t\t\t\t\t<div style=\"margin-bottom: 18px;\">\t\t\t\t<a rel=\"nofollow\" href=\"https:\/\/www.stelvision.com\/astro\/boutique\/le-ciel-au-telescope\/?ref=bottom\">\r\n\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/www.stelvision.com\/astro\/wp-content\/uploads\/2025\/10\/Ciel-au-telescope-1200x900-1.webp\" alt=\"visuel publicitaire livre le Ciel au t\u00e9lescope\" class=\"img-responsive\">\r\n\t\t\t\t<\/a>\r\n\t\t\t\t<p style=\"text-align: center; margin-bottom: 0em; margin-top: 0.25em;\"><strong><a rel=\"nofollow\" href=\"https:\/\/www.stelvision.com\/astro\/boutique\/le-ciel-au-telescope\/?ref=bottom\">Le Ciel au t\u00e9lescope, le guide indispensable pour r\u00e9ussir vos observations<\/a><\/strong><\/p>\r\n\t\t\t<\/div>\n","protected":false},"excerpt":{"rendered":"<p>La pollution lumineuse li\u00e9es aux \u00e9clairages artificiels emp\u00eache d&rsquo;observer le ciel nocturne, nuit \u00e0 la biodiversit\u00e9, et a des cons\u00e9quences sur la sant\u00e9 humaine. Voici notre dossier sur le sujet pour mieux en comprendre les nombreux enjeux.<\/p>\n","protected":false},"author":4,"featured_media":1935,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[2],"tags":[],"class_list":["post-1914","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-observer-le-ciel"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Pollution lumineuse&nbsp;: un fl\u00e9au \u00e0 combattre<\/title>\n<meta name=\"description\" content=\"Comprendre ce qu&#039;est la pollution lumineuse, en quoi elle est une nuisance et d\u00e9couvrir les solutions pour la combattre.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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