{"id":30216,"date":"2026-08-29T07:00:18","date_gmt":"2026-08-29T05:00:18","guid":{"rendered":"https:\/\/www.laterredufutur.com\/accueil\/?p=30216"},"modified":"2026-08-28T15:15:33","modified_gmt":"2026-08-28T13:15:33","slug":"nancy-grace-roman-le-nouveau-telescope-spatial-geant-de-la-nasa-sapprete-a-partir-a-la-conquete-de-lunivers","status":"publish","type":"post","link":"https:\/\/www.laterredufutur.com\/accueil\/nancy-grace-roman-le-nouveau-telescope-spatial-geant-de-la-nasa-sapprete-a-partir-a-la-conquete-de-lunivers\/","title":{"rendered":"Nancy Grace Roman : le nouveau t\u00e9lescope spatial g\u00e9ant de la NASA s\u2019appr\u00eate \u00e0 partir \u00e0 la conqu\u00eate de l\u2019Univers"},"content":{"rendered":"<div class=\"1665f18d14f35dd9e7566e1a8ac9a3e9\" data-index=\"1\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2860849627502538\"\r\n     data-ad-slot=\"3019501113\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n<p class=\"PDq2pG_selectionAnchorContainer\" data-start=\"115\" data-end=\"538\">La NASA se pr\u00e9pare \u00e0 lancer l\u2019une de ses missions astronomiques les plus ambitieuses de ces derni\u00e8res ann\u00e9es. Le <strong data-start=\"228\" data-end=\"265\">Nancy Grace Roman Space Telescope<\/strong> doit d\u00e9coller le <strong data-start=\"283\" data-end=\"374\">dimanche 30 ao\u00fbt 2026 \u00e0 7 h 26, heure de Floride, soit 13 h 26 en France m\u00e9tropolitaine<\/strong>, depuis le complexe de lancement 39A du Kennedy Space Center. Il sera plac\u00e9 au sommet d\u2019une fus\u00e9e <strong data-start=\"473\" data-end=\"499\">Falcon Heavy de SpaceX<\/strong>.<\/p>\n<p data-start=\"540\" data-end=\"854\">Si la mission se d\u00e9roule comme pr\u00e9vu, Roman rejoindra la famille des grands observatoires spatiaux aux c\u00f4t\u00e9s de Hubble et du James Webb Space Telescope. Mais sa sp\u00e9cialit\u00e9 sera diff\u00e9rente : plut\u00f4t que de se concentrer sur des portions tr\u00e8s \u00e9troites du ciel, il pourra observer d\u2019immenses r\u00e9gions en une seule fois.<\/p>\n<h2 data-section-id=\"1xl2c00\" data-start=\"856\" data-end=\"928\">Un t\u00e9lescope con\u00e7u pour cartographier l\u2019Univers \u00e0 tr\u00e8s grande \u00e9chelle<\/h2>\n<p data-start=\"930\" data-end=\"1114\">Le Nancy Grace Roman Space Telescope doit son nom \u00e0 <strong data-start=\"982\" data-end=\"1003\">Nancy Grace Roman<\/strong>, premi\u00e8re astronome en chef de la NASA et figure majeure du d\u00e9veloppement de l\u2019astronomie spatiale am\u00e9ricaine.<\/p>\n<p data-start=\"1116\" data-end=\"1417\">L\u2019observatoire mesure environ <strong data-start=\"1146\" data-end=\"1169\">12,7 m\u00e8tres de haut<\/strong>, 4,4 m\u00e8tres de large et affiche une masse proche de <strong data-start=\"1222\" data-end=\"1234\">8 tonnes<\/strong>. Sa construction a \u00e9t\u00e9 achev\u00e9e fin 2025, et fait notable, son lancement intervient plusieurs mois plus t\u00f4t que pr\u00e9vu dans le calendrier initial.<\/p>\n<p data-start=\"1419\" data-end=\"1596\">Roman poss\u00e8de un miroir principal d\u2019environ <strong data-start=\"1463\" data-end=\"1477\">2,4 m\u00e8tres<\/strong>, comparable \u00e0 celui de Hubble. Sa grande diff\u00e9rence r\u00e9side cependant dans son <strong data-start=\"1556\" data-end=\"1595\">champ de vision beaucoup plus vaste<\/strong>.<\/p>\n<p data-start=\"1598\" data-end=\"1812\">Son instrument principal, le <strong data-start=\"1627\" data-end=\"1652\">Wide Field Instrument<\/strong>, permettra de r\u00e9aliser de gigantesques relev\u00e9s astronomiques dans l\u2019infrarouge. Roman pourra ainsi \u00e9tudier simultan\u00e9ment des millions d\u2019\u00e9toiles et de galaxies.<\/p>\n<h2 data-section-id=\"j3cjqa\" data-start=\"1814\" data-end=\"1863\">Comprendre l\u2019\u00e9nergie noire et la mati\u00e8re noire<\/h2>\n<p data-start=\"1865\" data-end=\"2041\">L\u2019un des objectifs majeurs de Roman sera de tenter de r\u00e9soudre l\u2019une des plus grandes \u00e9nigmes de la cosmologie moderne : <strong data-start=\"1986\" data-end=\"2041\">pourquoi l\u2019expansion de l\u2019Univers acc\u00e9l\u00e8re-t-elle ?<\/strong><\/p>\n<p data-start=\"2043\" data-end=\"2186\">Cette acc\u00e9l\u00e9ration est g\u00e9n\u00e9ralement attribu\u00e9e \u00e0 une myst\u00e9rieuse composante appel\u00e9e <strong data-start=\"2126\" data-end=\"2143\">\u00e9nergie noire<\/strong>, dont la nature reste totalement inconnue.<\/p>\n<p data-start=\"2188\" data-end=\"2373\">En observant la distribution et l\u2019\u00e9volution de centaines de millions de galaxies, Roman permettra aux chercheurs de mesurer beaucoup plus pr\u00e9cis\u00e9ment l\u2019histoire de l\u2019expansion cosmique.<\/p>\n<p data-start=\"2375\" data-end=\"2667\">Le t\u00e9lescope \u00e9tudiera \u00e9galement la <strong data-start=\"2410\" data-end=\"2427\">mati\u00e8re noire<\/strong>, cette mati\u00e8re invisible qui ne semble pas interagir avec la lumi\u00e8re mais dont les effets gravitationnels jouent un r\u00f4le essentiel dans la formation des galaxies et des grandes structures de l\u2019Univers.<\/p>\n<h2 data-section-id=\"12kcee\" data-start=\"2669\" data-end=\"2737\">Des milliers de nouvelles exoplan\u00e8tes pourraient \u00eatre d\u00e9couvertes<\/h2>\n<p data-start=\"2739\" data-end=\"2857\">Roman aura \u00e9galement pour mission de r\u00e9aliser un v\u00e9ritable <strong data-start=\"2798\" data-end=\"2856\">recensement des syst\u00e8mes plan\u00e9taires de la Voie lact\u00e9e<\/strong>.<\/p>\n<p data-start=\"2859\" data-end=\"3240\">L&rsquo;observatoire utilisera notamment une technique appel\u00e9e <strong data-start=\"2916\" data-end=\"2950\">microlentille gravitationnelle<\/strong>. Lorsqu\u2019une \u00e9toile passe devant une autre vue depuis la Terre, sa gravit\u00e9 peut bri\u00e8vement amplifier la lumi\u00e8re de l\u2019\u00e9toile situ\u00e9e \u00e0 l\u2019arri\u00e8re-plan. Si une plan\u00e8te orbite autour de l\u2019\u00e9toile au premier plan, elle peut provoquer une petite perturbation suppl\u00e9mentaire dans ce signal lumineux.<\/p>\n<p data-start=\"3242\" data-end=\"3363\">Cette m\u00e9thode permet de d\u00e9tecter des mondes qui seraient extr\u00eamement difficiles \u00e0 rep\u00e9rer avec les techniques classiques.<\/p>\n<p data-start=\"3365\" data-end=\"3558\">La NASA esp\u00e8re ainsi d\u00e9couvrir <strong data-start=\"3396\" data-end=\"3426\">des milliers d\u2019exoplan\u00e8tes<\/strong>, ce qui permettra de mieux comprendre la diversit\u00e9 des syst\u00e8mes plan\u00e9taires de notre galaxie.<\/p>\n<p data-start=\"3560\" data-end=\"3919\">Roman embarque \u00e9galement un <strong data-start=\"3588\" data-end=\"3617\">coronographe exp\u00e9rimental<\/strong>, capable de bloquer la lumi\u00e8re tr\u00e8s intense d\u2019une \u00e9toile afin d\u2019observer plus facilement les objets tr\u00e8s faibles situ\u00e9s autour d\u2019elle, notamment certaines plan\u00e8tes. Cette technologie pourrait pr\u00e9parer une future g\u00e9n\u00e9ration de t\u00e9lescopes capables d\u2019imager directement des mondes similaires \u00e0 la Terre.<\/p>\n<figure id=\"attachment_30217\" aria-describedby=\"caption-attachment-30217\" style=\"width: 768px\" class=\"wp-caption aligncenter\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"30217\" data-permalink=\"https:\/\/www.laterredufutur.com\/accueil\/nancy-grace-roman-le-nouveau-telescope-spatial-geant-de-la-nasa-sapprete-a-partir-a-la-conquete-de-lunivers\/telescope-nancy-grace-roman-2\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/08\/telescope-nancy-grace-roman.webp?fit=768%2C432&amp;ssl=1\" data-orig-size=\"768,432\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;,&quot;alt&quot;:&quot;&quot;}\" data-image-title=\"telescope nancy grace roman\" data-image-description=\"\" data-image-caption=\"&lt;p&gt;Roman a \u00e9t\u00e9 recouvert de son car\u00e9nage protecteur en d\u00e9but de semaine, avant son lancement pr\u00e9vu dimanche (30 ao\u00fbt).&lt;\/p&gt;\n&lt;p&gt;(Cr\u00e9dit image : NASA\/Sydney Rohde (Rocz))&lt;\/p&gt;\n\" data-large-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/08\/telescope-nancy-grace-roman.webp?fit=768%2C432&amp;ssl=1\" class=\"wp-image-30217 size-full\" src=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/08\/telescope-nancy-grace-roman.webp?resize=768%2C432&#038;ssl=1\" alt=\"\" width=\"768\" height=\"432\" srcset=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/08\/telescope-nancy-grace-roman.webp?w=768&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/08\/telescope-nancy-grace-roman.webp?resize=300%2C169&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/08\/telescope-nancy-grace-roman.webp?resize=80%2C45&amp;ssl=1 80w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/08\/telescope-nancy-grace-roman.webp?resize=480%2C270&amp;ssl=1 480w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><figcaption id=\"caption-attachment-30217\" class=\"wp-caption-text\"><em>Roman a \u00e9t\u00e9 recouvert de son car\u00e9nage protecteur en d\u00e9but de semaine, avant son lancement pr\u00e9vu dimanche (30 ao\u00fbt).<\/em><br \/><em>(Cr\u00e9dit image : NASA\/Sydney Rohde (Rocz))<\/em><\/figcaption><\/figure>\n<h2 data-section-id=\"v9q4qi\" data-start=\"3921\" data-end=\"3986\">Une destination situ\u00e9e \u00e0 1,6 million de kilom\u00e8tres de la Terre<\/h2>\n<p data-start=\"3988\" data-end=\"4050\">Apr\u00e8s son lancement, Roman ne restera pas en orbite terrestre.<\/p>\n<p data-start=\"4052\" data-end=\"4208\">Le t\u00e9lescope prendra la direction du <strong data-start=\"4089\" data-end=\"4137\">point de Lagrange L2 du syst\u00e8me Soleil-Terre<\/strong>, situ\u00e9 \u00e0 environ <strong data-start=\"4155\" data-end=\"4207\">1,5 \u00e0 1,6 million de kilom\u00e8tres de notre plan\u00e8te<\/strong>.<\/p>\n<p data-start=\"4210\" data-end=\"4388\">Cette r\u00e9gion de l\u2019espace est particuli\u00e8rement int\u00e9ressante pour les grands observatoires astronomiques car elle offre des conditions thermiques et orbitales relativement stables.<\/p>\n<p data-start=\"4390\" data-end=\"4494\">Le James Webb Space Telescope ainsi que plusieurs autres observatoires travaillent d\u00e9j\u00e0 dans cette zone.<\/p>\n<p data-start=\"4496\" data-end=\"4550\">Le voyage de Roman vers L2 prendra plusieurs semaines.<\/p>\n<h2 data-section-id=\"53tpb3\" data-start=\"4552\" data-end=\"4596\">Quand verrons-nous les premi\u00e8res images ?<\/h2>\n<p data-start=\"4598\" data-end=\"4647\">Il faudra toutefois patienter apr\u00e8s le lancement.<\/p>\n<p data-start=\"4649\" data-end=\"4815\">Durant environ <strong data-start=\"4664\" data-end=\"4678\">trois mois<\/strong>, les \u00e9quipes de la NASA proc\u00e9deront au d\u00e9ploiement, \u00e0 l\u2019activation, \u00e0 l\u2019\u00e9talonnage et aux tests des diff\u00e9rents instruments du t\u00e9lescope.<\/p>\n<p data-start=\"4817\" data-end=\"5009\">Il s\u2019agit d\u2019une phase critique : les ing\u00e9nieurs devront v\u00e9rifier que les syst\u00e8mes optiques, \u00e9lectroniques et thermiques fonctionnent correctement avant le d\u00e9but des observations scientifiques.<\/p>\n<p data-start=\"5011\" data-end=\"5162\">La NASA pr\u00e9voit actuellement de publier les <strong data-start=\"5055\" data-end=\"5123\">premi\u00e8res images scientifiques de Roman au d\u00e9but de l\u2019ann\u00e9e 2027<\/strong>.<\/p>\n<p data-start=\"5164\" data-end=\"5346\">La comparaison avec James Webb est int\u00e9ressante : JWST avait d\u00e9coll\u00e9 en d\u00e9cembre 2021 et ses premi\u00e8res grandes images scientifiques avaient \u00e9t\u00e9 d\u00e9voil\u00e9es environ sept mois plus tard.<\/p>\n<p data-start=\"5348\" data-end=\"5418\">Roman pourrait donc devenir op\u00e9rationnel sensiblement plus rapidement.<\/p>\n<h2 data-section-id=\"1j1s0u7\" data-start=\"5420\" data-end=\"5458\">Un v\u00e9ritable \u00ab Hubble grand angle \u00bb<\/h2>\n<p data-start=\"5460\" data-end=\"5549\">Roman ne remplacera ni Hubble ni James Webb. Les trois t\u00e9lescopes seront compl\u00e9mentaires.<\/p>\n<p data-start=\"5551\" data-end=\"5828\">James Webb excelle dans l\u2019\u00e9tude extr\u00eamement d\u00e9taill\u00e9e de petites portions du ciel et dans l\u2019observation de galaxies tr\u00e8s lointaines. Roman pourra, lui, <strong data-start=\"5703\" data-end=\"5763\">rep\u00e9rer et cartographier d\u2019immenses populations d\u2019objets<\/strong>, que d\u2019autres observatoires pourront ensuite examiner en d\u00e9tail.<\/p>\n<p data-start=\"5830\" data-end=\"5908\">On peut donc voir Roman comme une sorte de <strong data-start=\"5873\" data-end=\"5907\">t\u00e9lescope panoramique cosmique<\/strong>.<\/p>\n<p data-start=\"5910\" data-end=\"6081\">L\u00e0 o\u00f9 Hubble pourrait observer une petite r\u00e9gion contenant quelques milliers de galaxies, Roman pourra \u00e9tudier une zone beaucoup plus vaste avec une r\u00e9solution comparable.<\/p>\n<p data-start=\"6083\" data-end=\"6321\">Les astronomes disposeront ainsi d\u2019une immense base de donn\u00e9es permettant de rechercher aussi bien des exoplan\u00e8tes que des \u00e9toiles, des supernov\u00e6, des trous noirs, des galaxies ou encore des ph\u00e9nom\u00e8nes astronomiques totalement inattendus.<\/p>\n<figure id=\"attachment_30218\" aria-describedby=\"caption-attachment-30218\" style=\"width: 768px\" class=\"wp-caption aligncenter\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"30218\" data-permalink=\"https:\/\/www.laterredufutur.com\/accueil\/nancy-grace-roman-le-nouveau-telescope-spatial-geant-de-la-nasa-sapprete-a-partir-a-la-conquete-de-lunivers\/telescope-nancy-grace-roman-3\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/08\/telescope-nancy-grace-roman-1.webp?fit=768%2C432&amp;ssl=1\" data-orig-size=\"768,432\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;,&quot;alt&quot;:&quot;&quot;}\" data-image-title=\"telescope nancy grace roman\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/08\/telescope-nancy-grace-roman-1.webp?fit=768%2C432&amp;ssl=1\" class=\"wp-image-30218 size-full\" src=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/08\/telescope-nancy-grace-roman-1.webp?resize=768%2C432&#038;ssl=1\" alt=\"\" width=\"768\" height=\"432\" srcset=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/08\/telescope-nancy-grace-roman-1.webp?w=768&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/08\/telescope-nancy-grace-roman-1.webp?resize=300%2C169&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/08\/telescope-nancy-grace-roman-1.webp?resize=80%2C45&amp;ssl=1 80w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/08\/telescope-nancy-grace-roman-1.webp?resize=480%2C270&amp;ssl=1 480w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><figcaption id=\"caption-attachment-30218\" class=\"wp-caption-text\"><em>Roman mesure 12,8 m\u00e8tres de haut et p\u00e8se environ le m\u00eame poids qu&rsquo;un T. rex adulte . Cette photo a \u00e9t\u00e9 prise le 4 d\u00e9cembre 2025, peu apr\u00e8s l&rsquo;ach\u00e8vement de la construction du vaisseau spatial. (Cr\u00e9dit photo : NASA\/Jolearra Tshiteya)<\/em><\/figcaption><\/figure>\n<h2 data-section-id=\"1yfz64p\" data-start=\"6323\" data-end=\"6367\">Une mission pr\u00e9vue pour au moins cinq ans<\/h2>\n<p data-start=\"6369\" data-end=\"6531\">La mission scientifique principale est pr\u00e9vue pour durer environ <strong data-start=\"6434\" data-end=\"6446\">cinq ans<\/strong>, mais les ing\u00e9nieurs esp\u00e8rent que Roman pourra rester actif beaucoup plus longtemps.<\/p>\n<p data-start=\"6533\" data-end=\"6737\">L\u2019exp\u00e9rience de Hubble montre en effet que les grands observatoires spatiaux peuvent largement d\u00e9passer leur dur\u00e9e de vie initialement pr\u00e9vue lorsque leurs syst\u00e8mes continuent de fonctionner correctement.<\/p>\n<p data-start=\"6739\" data-end=\"6818\">Roman pourrait donc observer le ciel pendant une dizaine d\u2019ann\u00e9es ou davantage.<\/p>\n<p data-start=\"6820\" data-end=\"7101\">Autre particularit\u00e9 importante : la NASA pr\u00e9voit que les donn\u00e9es provenant des grands relev\u00e9s de Roman soient <strong data-start=\"6930\" data-end=\"6984\">rendues publiques rapidement apr\u00e8s leur traitement<\/strong>, sans longue p\u00e9riode r\u00e9serv\u00e9e exclusivement \u00e0 certaines \u00e9quipes scientifiques.<\/p>\n<p data-start=\"7103\" data-end=\"7228\">Cela pourrait permettre \u00e0 des milliers de chercheurs du monde entier d\u2019exploiter simultan\u00e9ment les observations du t\u00e9lescope.<\/p>\n<h2 data-section-id=\"r3wdao\" data-start=\"7230\" data-end=\"7267\">Une nouvelle \u00e8re pour l\u2019astronomie<\/h2>\n<p data-start=\"7269\" data-end=\"7396\">Avec Roman, James Webb, Euclid et l\u2019observatoire Vera C. Rubin, les astronomes entrent dans une p\u00e9riode particuli\u00e8rement riche.<\/p>\n<p data-start=\"7398\" data-end=\"7520\">Ces instruments vont produire des quantit\u00e9s gigantesques de donn\u00e9es et observer l\u2019Univers sous des angles compl\u00e9mentaires.<\/p>\n<p data-start=\"7522\" data-end=\"7773\">Roman pourrait notamment permettre de d\u00e9terminer plus pr\u00e9cis\u00e9ment la nature de l\u2019\u00e9nergie noire, r\u00e9v\u00e9ler la distribution de la mati\u00e8re noire, d\u00e9couvrir des milliers de nouvelles plan\u00e8tes et cartographier une partie consid\u00e9rable de l\u2019Univers observable.<\/p>\n<p data-start=\"7775\" data-end=\"7931\">Si le lancement du <strong data-start=\"7794\" data-end=\"7810\">30 ao\u00fbt 2026<\/strong> se d\u00e9roule comme pr\u00e9vu, il faudra donc attendre encore quelques mois avant de d\u00e9couvrir ses premi\u00e8res v\u00e9ritables images.<\/p>\n<p data-start=\"7933\" data-end=\"8095\">Mais d\u00e8s <strong data-start=\"7942\" data-end=\"7956\">d\u00e9but 2027<\/strong>, Nancy Grace Roman pourrait commencer \u00e0 nous offrir une vision de l\u2019Univers \u00e0 une \u00e9chelle encore jamais atteinte par un t\u00e9lescope spatial.<\/p>\n<figure id=\"attachment_30220\" aria-describedby=\"caption-attachment-30220\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"30220\" data-permalink=\"https:\/\/www.laterredufutur.com\/accueil\/nancy-grace-roman-le-nouveau-telescope-spatial-geant-de-la-nasa-sapprete-a-partir-a-la-conquete-de-lunivers\/telescope-nancy-grace-roman-4\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/08\/telescope-nancy-grace-roman-2.webp?fit=1024%2C576&amp;ssl=1\" data-orig-size=\"1024,576\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;,&quot;alt&quot;:&quot;&quot;}\" data-image-title=\"telescope nancy grace roman\" data-image-description=\"\" data-image-caption=\"&lt;p&gt;Le t\u00e9lescope spatial Roman a d\u00e9j\u00e0 \u00e9t\u00e9 install\u00e9 dans une coiffe qui sera plac\u00e9e au sommet d&amp;rsquo;une fus\u00e9e Falcon Heavy de SpaceX. Cette photo, prise le 25 ao\u00fbt, montre la charge utile en cours de transport vers le complexe de lancement 39A du Centre spatial Kennedy de la NASA, en Floride, d&amp;rsquo;o\u00f9 le lancement est pr\u00e9vu pour le dimanche 30 ao\u00fbt.&lt;br \/&gt;\n(Cr\u00e9dit image : NASA\/Sydney Rohde (Rocz))&lt;\/p&gt;\n\" data-large-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/08\/telescope-nancy-grace-roman-2.webp?fit=800%2C450&amp;ssl=1\" class=\"wp-image-30220 size-large\" src=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/08\/telescope-nancy-grace-roman-2.webp?resize=800%2C450&#038;ssl=1\" alt=\"\" width=\"800\" height=\"450\" srcset=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/08\/telescope-nancy-grace-roman-2.webp?resize=800%2C450&amp;ssl=1 800w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/08\/telescope-nancy-grace-roman-2.webp?resize=300%2C169&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/08\/telescope-nancy-grace-roman-2.webp?resize=80%2C45&amp;ssl=1 80w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/08\/telescope-nancy-grace-roman-2.webp?resize=768%2C432&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/08\/telescope-nancy-grace-roman-2.webp?resize=928%2C522&amp;ssl=1 928w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/08\/telescope-nancy-grace-roman-2.webp?resize=480%2C270&amp;ssl=1 480w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/08\/telescope-nancy-grace-roman-2.webp?w=1024&amp;ssl=1 1024w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-30220\" class=\"wp-caption-text\"><em>Le t\u00e9lescope spatial Roman a d\u00e9j\u00e0 \u00e9t\u00e9 install\u00e9 dans une coiffe qui sera plac\u00e9e au sommet d&rsquo;une fus\u00e9e Falcon Heavy de SpaceX. Cette photo, prise le 25 ao\u00fbt, montre la charge utile en cours de transport vers le complexe de lancement 39A du Centre spatial Kennedy de la NASA, en Floride, d&rsquo;o\u00f9 le lancement est pr\u00e9vu pour le dimanche 30 ao\u00fbt. (Cr\u00e9dit image : NASA\/Sydney Rohde (Rocz))<\/em><\/figcaption><\/figure>\n<p data-start=\"7933\" data-end=\"8095\">Adaptation Terra Projects<\/p>\n<h3 data-section-id=\"1qtzs4p\" data-start=\"8097\" data-end=\"8119\"><em>Sources&nbsp;<\/em><\/h3>\n<p data-start=\"8121\" data-end=\"8402\"><em>NASA \u2013 Nancy Grace Roman Space Telescope et calendrier du lancement. <\/em><br data-start=\"8227\" data-end=\"8230\"\/><em>Live Science \u2013 informations sur le lancement et les premi\u00e8res images. <\/em><br data-start=\"8337\" data-end=\"8340\"\/><em>NASA\/JPL \u2013 Coronagraph Instrument et recherche d\u2019exoplan\u00e8tes.<\/em><\/p>\n<p class=\"bawpvc-ajax-counter\" data-id=\"30216\">(14)<\/p>\n<!--CusAds0-->\n<div style=\"font-size: 0px; height: 0px; line-height: 0px; margin: 0; padding: 0; clear: both;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>La NASA se pr\u00e9pare \u00e0 lancer l\u2019une de ses missions astronomiques les plus ambitieuses de ces derni\u00e8res ann\u00e9es. Le Nancy&#8230;<\/p>\n","protected":false},"author":1,"featured_media":30220,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"ngg_post_thumbnail":0,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[22],"tags":[1511,359,8293,8429,1656],"class_list":["post-30216","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-espace","tag-cartographie","tag-exoplanete","tag-nancy-grace-roman","tag-telescospe","tag-univers","wpcat-22-id"],"jetpack_publicize_connections":[],"jetpack_shortlink":"https:\/\/wp.me\/p631RN-7Rm","jetpack-related-posts":[{"id":27549,"url":"https:\/\/www.laterredufutur.com\/accueil\/la-nasa-acheve-la-construction-dun-telescope-de-nouvelle-generation-qui-pourrait-bientot-reveler-si-nous-sommes-seuls-au-monde\/","url_meta":{"origin":30216,"position":0},"title":"La NASA ach\u00e8ve la construction d&rsquo;un t\u00e9lescope de nouvelle g\u00e9n\u00e9ration, qui pourrait bient\u00f4t r\u00e9v\u00e9ler si nous sommes seuls au monde","author":"Admin","date":"19 d\u00e9cembre 2025","format":false,"excerpt":"Si vous ressentez une excitation particuli\u00e8re \u00e0 chaque nouvelle d\u00e9couverte sur le cosmos, alors le 25 novembre a peut-\u00eatre \u00e9t\u00e9 une date marquante pour vous. C'est en effet le jour o\u00f9 la NASA a achev\u00e9 l'assemblage du t\u00e9lescope Nancy Grace Roman . Les deux principaux segments du puissant t\u00e9lescope spatial\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2025\/12\/telescope-Nancy-Grace-Roman.jpg?fit=642%2C450&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2025\/12\/telescope-Nancy-Grace-Roman.jpg?fit=642%2C450&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2025\/12\/telescope-Nancy-Grace-Roman.jpg?fit=642%2C450&ssl=1&resize=525%2C300 1.5x"},"classes":[]},{"id":27282,"url":"https:\/\/www.laterredufutur.com\/accueil\/la-nasa-confirme-6-000-exoplanetes-decouvertes-a-ce-jour\/","url_meta":{"origin":30216,"position":1},"title":"La NASA confirme : 6 000 exoplan\u00e8tes d\u00e9couvertes \u00e0 ce jour !","author":"Admin","date":"29 septembre 2025","format":false,"excerpt":"L'\u00e8re des exoplan\u00e8tes a commenc\u00e9 en 1992, lorsque des astronomes ont d\u00e9tect\u00e9 une paire de plan\u00e8tes en orbite autour d'un pulsar . Puis, en 1995, ils ont d\u00e9couvert la premi\u00e8re exoplan\u00e8te en orbite autour d'une \u00e9toile de la s\u00e9quence principale. Avec le lancement des missions Kepler et TESS de la\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/07\/exoplanete-ocean.jpg?fit=1024%2C1024&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/07\/exoplanete-ocean.jpg?fit=1024%2C1024&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/07\/exoplanete-ocean.jpg?fit=1024%2C1024&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/07\/exoplanete-ocean.jpg?fit=1024%2C1024&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":2691,"url":"https:\/\/www.laterredufutur.com\/accueil\/quand-hubble-laisse-sa-place\/","url_meta":{"origin":30216,"position":2},"title":"Quand Hubble laisse sa place","author":"Admin","date":"9 f\u00e9vrier 2005","format":false,"excerpt":"Devant la fin annonc\u00e9e du T\u00e9l\u00e9scope Hubble, et au del\u00e0 du budget consid\u00e9rable qu'il faudrait pour le maintenir (plus d'un milliard de$), nous allons voir que le prochain t\u00e9lescope est beaucoup plus ambitieux, voyez ici... Le t\u00e9lescope spatial Hubble (HST) est le plus grand t\u00e9lescope optique jamais mis sur orbite.\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/02\/telescope-hubble.jpg?fit=1024%2C1024&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/02\/telescope-hubble.jpg?fit=1024%2C1024&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/02\/telescope-hubble.jpg?fit=1024%2C1024&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/02\/telescope-hubble.jpg?fit=1024%2C1024&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":23679,"url":"https:\/\/www.laterredufutur.com\/accueil\/le-telescope-spatial-james-webb-a-atteint-sa-destination\/","url_meta":{"origin":30216,"position":3},"title":"Le t\u00e9lescope spatial James Webb a atteint sa destination","author":"Admin","date":"25 janvier 2022","format":false,"excerpt":"Apr\u00e8s un voyage de 30 jours, le t\u00e9lescope spatial James Webb (JWST) de la NASA a atteint sa destination au point de Lagrange 2 (L2), \u00e0 environ 1,5 million de kilom\u00e8tres de la Terre. \u00c0 14 h HNE, il a allum\u00e9 ses moteurs principaux pendant 297 secondes pour modifier sa\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/01\/telescope-james-webb-2.jpg?fit=1200%2C800&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/01\/telescope-james-webb-2.jpg?fit=1200%2C800&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/01\/telescope-james-webb-2.jpg?fit=1200%2C800&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/01\/telescope-james-webb-2.jpg?fit=1200%2C800&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/01\/telescope-james-webb-2.jpg?fit=1200%2C800&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":23591,"url":"https:\/\/www.laterredufutur.com\/accueil\/29-jours-sur-le-fil-du-rasoir-ce-qui-attend-le-nouveau-telescope-spatial-james-webb-de-la-nasa\/","url_meta":{"origin":30216,"position":4},"title":"29 jours sur le fil du rasoir : ce qui attend le nouveau t\u00e9lescope spatial James Webb de la NASA","author":"Admin","date":"29 d\u00e9cembre 2021","format":false,"excerpt":"Le lancement a donn\u00e9 le coup d'envoi d'un long voyage pour le t\u00e9lescope de 10 milliards de dollars. Le prochain grand t\u00e9lescope spatial de la NASA est enfin dans l'espace, mais il faudra attendre un certain temps avant qu'il ne commence sa mission scientifique tr\u00e8s attendue. Le t\u00e9lescope spatial James\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/12\/james-webb-telescope.jpg?fit=1024%2C574&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/12\/james-webb-telescope.jpg?fit=1024%2C574&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/12\/james-webb-telescope.jpg?fit=1024%2C574&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/12\/james-webb-telescope.jpg?fit=1024%2C574&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":23937,"url":"https:\/\/www.laterredufutur.com\/accueil\/nous-venons-de-depasser-le-seuil-de-5000-exoplanetes-decouvertes\/","url_meta":{"origin":30216,"position":5},"title":"Nous venons de d\u00e9passer le seuil de 5000 exoplan\u00e8tes d\u00e9couvertes","author":"Admin","date":"7 avril 2022","format":false,"excerpt":"Le nombre d'exoplan\u00e8tes confirm\u00e9es vient de d\u00e9passer la barre des 5 000, ce qui repr\u00e9sente un voyage de d\u00e9couverte de 30 ans men\u00e9 par les t\u00e9lescopes spatiaux de la NASA, des t\u00e9lescopes terrestres et des t\u00e9lescopes spatiaux. La premi\u00e8re exoplan\u00e8te fut d\u00e9couverte le 6 octobre 1995 par Christophe Colomb avec\u2026","rel":"","context":"Dans &quot;Espace&quot;","block_context":{"text":"Espace","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/espace\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/04\/exoplanetes-decouvertes.jpg?fit=1200%2C600&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/04\/exoplanetes-decouvertes.jpg?fit=1200%2C600&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/04\/exoplanetes-decouvertes.jpg?fit=1200%2C600&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/04\/exoplanetes-decouvertes.jpg?fit=1200%2C600&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2022\/04\/exoplanetes-decouvertes.jpg?fit=1200%2C600&ssl=1&resize=1050%2C600 3x"},"classes":[]}],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/08\/telescope-nancy-grace-roman-2.webp?fit=1024%2C576&ssl=1","_links":{"self":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/30216","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/comments?post=30216"}],"version-history":[{"count":3,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/30216\/revisions"}],"predecessor-version":[{"id":30222,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/30216\/revisions\/30222"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media\/30220"}],"wp:attachment":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media?parent=30216"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/categories?post=30216"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/tags?post=30216"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}