1.0Étienne Ghyshttps://perso.ens-lyon.fr/ghysghyshttps://perso.ens-lyon.fr/ghys/author/ghys/rich600338<blockquote class="wp-embedded-content" data-secret="N42PFh7p1v"><a href="https://perso.ens-lyon.fr/ghys/2021/12/21/the-unfortunate-eclipse-of-cosmography/">The unfortunate eclipse of cosmography</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://perso.ens-lyon.fr/ghys/2021/12/21/the-unfortunate-eclipse-of-cosmography/embed/#?secret=N42PFh7p1v" width="600" height="338" title="« The unfortunate eclipse of cosmography » — Étienne Ghys" data-secret="N42PFh7p1v" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script> /*! This file is auto-generated */ !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); </script> https://www.lemonde.fr/sciences/article/2021/12/21/l-eclipse-malheureuse-de-la-cosmographie_6106872_1650684.html This Tuesday, December 21 will be the winter solstice in the Northern Hemisphere. At noon, the height of the Sun above the horizon will be the lowest of the whole year. In the following days, the Sun will rise only slightly higher in the sky and this explains the origin of the word: sol … Continuer la lecture de →