1.051ÁÔÆæ Science Bag/science-bag51ÁÔÆæ Science Bag/science-bagA Survey of Spacetimerich600338<blockquote class="wp-embedded-content" data-secret="3QNuWCauo2"><a href="/science-bag/a-survey-of-spacetime/">A Survey of Spacetime</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="/science-bag/a-survey-of-spacetime/embed/#?secret=3QNuWCauo2" width="600" height="338" title="“A Survey of Spacetime” — 51ÁÔÆæ Science Bag" data-secret="3QNuWCauo2" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript">
/* <![CDATA[ */
/*! 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);
//# sourceURL=/science-bag/wp-includes/js/wp-embed.min.js
/* ]]> */
</script>
/science-bag/wp-content/uploads/sites/379/2023/12/Survey-of-Spacetime.webp902500Jolien Creighton — Geometry was invented to measure the Earth—to survey plots of land and to find distances between towns. We now use the same surveying methods to measure the distances to stars and the shape of the universe. But …