{"version":"1.0","provider_name":"The Spacewriter&#039;s Ramblings","provider_url":"https:\/\/thespacewriter.com\/wp","title":"Where Do Telescope Mirrors Come From? - The Spacewriter&#039;s Ramblings","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"ZCa6cCizDZ\"><a href=\"https:\/\/thespacewriter.com\/wp\/2008\/09\/02\/where-do-telescope-mirrors-come-from\/\">Where Do Telescope Mirrors Come From?<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/thespacewriter.com\/wp\/2008\/09\/02\/where-do-telescope-mirrors-come-from\/embed\/#?secret=ZCa6cCizDZ\" width=\"600\" height=\"338\" title=\"&#8220;Where Do Telescope Mirrors Come From?&#8221; &#8212; The Spacewriter&#039;s Ramblings\" data-secret=\"ZCa6cCizDZ\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script>\n\/*! This file is auto-generated *\/\n!function(c,d){\"use strict\";var e=!1,o=!1;if(d.querySelector)if(c.addEventListener)e=!0;if(c.wp=c.wp||{},c.wp.receiveEmbedMessage);else if(c.wp.receiveEmbedMessage=function(e){var t=e.data;if(!t);else if(!(t.secret||t.message||t.value));else if(\/[^a-zA-Z0-9]\/.test(t.secret));else{for(var r,s,a,i=d.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),n=d.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),o=new RegExp(\"^https?:$\",\"i\"),l=0;l<n.length;l++)n[l].style.display=\"none\";for(l=0;l<i.length;l++)if(r=i[l],e.source!==r.contentWindow);else{if(r.removeAttribute(\"style\"),\"height\"===t.message){if(1e3<(s=parseInt(t.value,10)))s=1e3;else if(~~s<200)s=200;r.height=s}if(\"link\"===t.message)if(s=d.createElement(\"a\"),a=d.createElement(\"a\"),s.href=r.getAttribute(\"src\"),a.href=t.value,!o.test(a.protocol));else if(a.host===s.host)if(d.activeElement===r)c.top.location.href=t.value}}},e)c.addEventListener(\"message\",c.wp.receiveEmbedMessage,!1),d.addEventListener(\"DOMContentLoaded\",t,!1),c.addEventListener(\"load\",t,!1);function t(){if(o);else{o=!0;for(var e,t,r,s=-1!==navigator.appVersion.indexOf(\"MSIE 10\"),a=!!navigator.userAgent.match(\/Trident.*rv:11\\.\/),i=d.querySelectorAll(\"iframe.wp-embedded-content\"),n=0;n<i.length;n++){if(!(r=(t=i[n]).getAttribute(\"data-secret\")))r=Math.random().toString(36).substr(2,10),t.src+=\"#?secret=\"+r,t.setAttribute(\"data-secret\",r);if(s||a)(e=t.cloneNode(!0)).removeAttribute(\"security\"),t.parentNode.replaceChild(e,t);t.contentWindow.postMessage({message:\"ready\",secret:r},\"*\")}}}}(window,document);\n<\/script>\n","description":"Ovens&#8230; Big Astronomy (and with it, the science of astrophysics) requires big mirrors to see farther and fainter across the universe.\u00a0 If you visit such places as Palomar Observatory or Gemini, you see big mirrors that act as giant light buckets to capture as many photons as they can from dim, distant objects.\u00a0 Mirror-building is &hellip; Continue reading &rarr;","thumbnail_url":"http:\/\/www.lsst.org\/Gallery\/photos\/LSST08-image-thumb.jpg"}