{"version":"1.0","provider_name":"LUMINESCIENCES : le blog de Jean-Pierre LUMINET, astrophysicien","provider_url":"https:\/\/blogs.futura-sciences.com\/luminet","author_name":"Jean-Pierre LUMINET","author_url":"https:\/\/blogs.futura-sciences.com\/luminet\/author\/jpluminet\/","title":"Univers jumeaux et gravit\u00e9 bim\u00e9trique, par Jean-Pierre Luminet","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"Dw1Rd956Xn\"><a href=\"https:\/\/blogs.futura-sciences.com\/luminet\/2026\/09\/23\/univers-jumeaux-et-gravite-bimetrique\/\">Univers jumeaux et gravit\u00e9 bim\u00e9trique<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/blogs.futura-sciences.com\/luminet\/2026\/09\/23\/univers-jumeaux-et-gravite-bimetrique\/embed\/#?secret=Dw1Rd956Xn\" width=\"600\" height=\"338\" title=\"\u00ab\u00a0Univers jumeaux et gravit\u00e9 bim\u00e9trique\u00a0\u00bb &#8212; LUMINESCIENCES : le blog de Jean-Pierre LUMINET, astrophysicien\" data-secret=\"Dw1Rd956Xn\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script>\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n<\/script>\n","thumbnail_url":"https:\/\/blogs.futura-sciences.com\/luminet\/wp-content\/uploads\/sites\/2\/2026\/09\/Capture-decran-2026-09-23-a-20.55.57.png","thumbnail_width":1762,"thumbnail_height":756,"description":"De Sakharov aux th\u00e9ories bim\u00e9triques modernes, l&#8217;id\u00e9e d&#8217;univers jumeaux a pris des significations tr\u00e8s diff\u00e9rentes. Cet article examine notamment la gravit\u00e9 bim\u00e9trique, les masses n\u00e9gatives, le mod\u00e8le Janus et les alternatives propos\u00e9es aux trous noirs. Il s&#8217;agit de la version fran\u00e7aise de mon article publi\u00e9 en anglais dans Inference : The International Review of Science &hellip; Continuer la lecture de  &rarr;"}