{"id":13414,"date":"2020-04-28T07:58:23","date_gmt":"2020-04-28T14:58:23","guid":{"rendered":"http:\/\/www.preposterousuniverse.com\/blog\/?p=13414"},"modified":"2020-05-03T17:30:08","modified_gmt":"2020-05-04T00:30:08","slug":"the-biggest-ideas-in-the-universe-6-spacetime","status":"publish","type":"post","link":"https:\/\/preposterousuniverse.com\/blog\/2020\/04\/28\/the-biggest-ideas-in-the-universe-6-spacetime\/","title":{"rendered":"The Biggest Ideas in the Universe | 6. Spacetime"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">This week&#8217;s edition of The Biggest Ideas in the Universe completes a little trilogy, following as it does 4. Space and 5. Time. The theory of special relativity brings these two big ideas into one unified notion of four-dimensional spacetime. Learn why I don&#8217;t like talking about length contraction and time dilation!<\/p>\n\n\n<figure class=\"wp-block-embed-youtube wp-block-embed is-type-video is-provider-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"lyte-wrapper\" title=\"The Biggest Ideas in the Universe | 6. Spacetime\" style=\"width:640px;max-width:100%;margin:5px;\"><div class=\"lyMe\" id=\"WYL_Cg2tOUTE2F4\" itemprop=\"video\" itemscope itemtype=\"https:\/\/schema.org\/VideoObject\"><div><meta itemprop=\"thumbnailUrl\" content=\"https:\/\/i.ytimg.com\/vi\/Cg2tOUTE2F4\/hqdefault.jpg\" \/><meta itemprop=\"embedURL\" content=\"https:\/\/www.youtube.com\/embed\/Cg2tOUTE2F4\" \/><meta itemprop=\"duration\" content=\"PT1H3M21S\" \/><meta itemprop=\"uploadDate\" content=\"2020-04-28T14:55:00Z\" \/><\/div><div id=\"lyte_Cg2tOUTE2F4\" data-src=\"https:\/\/i.ytimg.com\/vi\/Cg2tOUTE2F4\/hqdefault.jpg\" class=\"pL\"><div class=\"tC\"><div class=\"tT\" itemprop=\"name\">The Biggest Ideas in the Universe | 6. Spacetime<\/div><\/div><div class=\"play\"><\/div><div class=\"ctrl\"><div class=\"Lctrl\"><\/div><div class=\"Rctrl\"><\/div><\/div><\/div><noscript><a href=\"https:\/\/youtu.be\/Cg2tOUTE2F4\" rel=\"nofollow\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/i.ytimg.com\/vi\/Cg2tOUTE2F4\/0.jpg\" alt=\"The Biggest Ideas in the Universe | 6. Spacetime\" width=\"640\" height=\"340\" \/><br \/>Watch this video on YouTube<\/a><\/noscript><meta itemprop=\"description\" content=\"The Biggest Ideas in the Universe is a series of videos where I talk informally about some of the fundamental concepts that help us understand our natural world. Exceedingly casual, not overly polished, and meant for absolutely everybody. This is Idea #6, &quot;Spacetime.&quot; Which, naturally, is about the major idea underlying special relativity -- that both space and time are different parts of one unified, four-dimensional spacetime. Learn the real reason why two twins age differently if one stays home and the other zips out near the speed of light. My web page: http:\/\/www.preposterousuniverse.com\/ My YouTube channel: https:\/\/www.youtube.com\/c\/seancarroll Mindscape podcast: http:\/\/www.preposterousuniverse.com\/podcast The Biggest Ideas playlist: https:\/\/www.youtube.com\/watch?v=HI09kat_GeI&amp;list=PLrxfgDEc2NxZJcWcrxH3jyjUUrJlnoyzX&amp;ab_channel=SeanCarroll Blog posts for the series: http:\/\/www.preposterousuniverse.com\/blog\/category\/biggest-ideas-in-the-universe\/ Background image: https:\/\/www.amazon.com\/Spacetime-Geometry-Introduction-General-Relativity-ebook\/dp\/B07T9MCTWF\/ #science #physics #ideas #universe #learning #cosmology #philosophy #math #spacetime #relativity\"><\/div><\/div><div class=\"lL\" style=\"max-width:100%;width:640px;margin:5px;\"><\/div><figcaption><\/figcaption><\/figure>\n\n\n<p class=\"wp-block-paragraph\">And here&#8217;s the Q&amp;A video:<\/p>\n\n\n<figure class=\"wp-block-embed-youtube wp-block-embed is-type-video is-provider-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"lyte-wrapper\" title=\"The Biggest Ideas in the Universe | Q&amp;amp;A 6 - Spacetime\" style=\"width:640px;max-width:100%;margin:5px;\"><div class=\"lyMe\" id=\"WYL_7bCToECHXqY\" itemprop=\"video\" itemscope itemtype=\"https:\/\/schema.org\/VideoObject\"><div><meta itemprop=\"thumbnailUrl\" content=\"https:\/\/i.ytimg.com\/vi\/7bCToECHXqY\/hqdefault.jpg\" \/><meta itemprop=\"embedURL\" content=\"https:\/\/www.youtube.com\/embed\/7bCToECHXqY\" \/><meta itemprop=\"duration\" content=\"PT35M39S\" \/><meta itemprop=\"uploadDate\" content=\"2020-05-04T00:24:00Z\" \/><\/div><div id=\"lyte_7bCToECHXqY\" data-src=\"https:\/\/i.ytimg.com\/vi\/7bCToECHXqY\/hqdefault.jpg\" class=\"pL\"><div class=\"tC\"><div class=\"tT\" itemprop=\"name\">The Biggest Ideas in the Universe | Q&amp;A 6 - Spacetime<\/div><\/div><div class=\"play\"><\/div><div class=\"ctrl\"><div class=\"Lctrl\"><\/div><div class=\"Rctrl\"><\/div><\/div><\/div><noscript><a href=\"https:\/\/youtu.be\/7bCToECHXqY\" rel=\"nofollow\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/i.ytimg.com\/vi\/7bCToECHXqY\/0.jpg\" alt=\"The Biggest Ideas in the Universe | Q&amp;amp;A 6 - Spacetime\" width=\"640\" height=\"340\" \/><br \/>Watch this video on YouTube<\/a><\/noscript><meta itemprop=\"description\" content=\"The Biggest Ideas in the Universe is a series of videos where I talk informally about some of the fundamental concepts that help us understand our natural world. Exceedingly casual, not overly polished, and meant for absolutely everybody. This is the Q&amp;A video for Idea #6, &quot;Spacetime.&quot; I try to explain what is meant by &quot;photons do not experience time,&quot; and why the speed of light has the value it does. My web page: http:\/\/www.preposterousuniverse.com\/ My YouTube channel: https:\/\/www.youtube.com\/c\/seancarroll Mindscape podcast: http:\/\/www.preposterousuniverse.com\/podcast The Biggest Ideas playlist: https:\/\/www.youtube.com\/watch?v=HI09kat_GeI&amp;list=PLrxfgDEc2NxZJcWcrxH3jyjUUrJlnoyzX&amp;ab_channel=SeanCarroll Blog posts for the series: http:\/\/www.preposterousuniverse.com\/blog\/category\/biggest-ideas-in-the-universe\/ Background image: https:\/\/www.amazon.com\/Spacetime-Geometry-Introduction-General-Relativity-ebook\/dp\/B07T9MCTWF\/ #science #physics #ideas #universe #learning #cosmology #philosophy #math #spacetime #relativity\"><\/div><\/div><div class=\"lL\" style=\"max-width:100%;width:640px;margin:5px;\"><\/div><figcaption><\/figcaption><\/figure>","protected":false},"excerpt":{"rendered":"<p>This week&#8217;s edition of The Biggest Ideas in the Universe completes a little trilogy, following as it does 4. Space and 5. Time. The theory of special relativity brings these two big ideas into one unified notion of four-dimensional spacetime. Learn why I don&#8217;t like talking about length contraction and time dilation! And here&#8217;s the [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[137,28,35],"tags":[],"class_list":["post-13414","post","type-post","status-publish","format-standard","hentry","category-biggest-ideas-in-the-universe","category-science","category-time"],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/preposterousuniverse.com\/blog\/wp-json\/wp\/v2\/posts\/13414","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/preposterousuniverse.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/preposterousuniverse.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/preposterousuniverse.com\/blog\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/preposterousuniverse.com\/blog\/wp-json\/wp\/v2\/comments?post=13414"}],"version-history":[{"count":2,"href":"https:\/\/preposterousuniverse.com\/blog\/wp-json\/wp\/v2\/posts\/13414\/revisions"}],"predecessor-version":[{"id":13418,"href":"https:\/\/preposterousuniverse.com\/blog\/wp-json\/wp\/v2\/posts\/13414\/revisions\/13418"}],"wp:attachment":[{"href":"https:\/\/preposterousuniverse.com\/blog\/wp-json\/wp\/v2\/media?parent=13414"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/preposterousuniverse.com\/blog\/wp-json\/wp\/v2\/categories?post=13414"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/preposterousuniverse.com\/blog\/wp-json\/wp\/v2\/tags?post=13414"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}