{"id":1780,"date":"2020-05-04T19:22:05","date_gmt":"2020-05-04T19:22:05","guid":{"rendered":"https:\/\/sites.ps.uci.edu\/mathceo\/?page_id=1780"},"modified":"2020-05-16T22:15:26","modified_gmt":"2020-05-16T22:15:26","slug":"alien-civilizations","status":"publish","type":"page","link":"https:\/\/sites.ps.uci.edu\/mathceo-old\/meeting-4\/alien-civilizations\/","title":{"rendered":"Alien Civilizations"},"content":{"rendered":"\n<p>Frank Drake in 1961 tackled a most puzzling question: <\/p>\n\n\n\n<p>  <\/p>\n\n\n\n<p class=\"has-background has-text-align-center has-subtle-background-background-color\"><em>Does there exists any intelligent extra-terrestrial life in our Milky Way galaxy?  <\/em><\/p>\n\n\n\n<p>  <\/p>\n\n\n\n<p>Drake came up with a method to estimate how many alien civilizations can actually communicate with us.  It is known as the <strong><a href=\"https:\/\/www.seti.org\/drake-equation-index\" target=\"_blank\" rel=\"noreferrer noopener\">Drake Equation<\/a><\/strong> and it multiplies together 7 numbers.  Each number is denoted by a symbol.<\/p>\n\n\n<div id=\"pl-gb1780-6a0591483d9b6\"  class=\"panel-layout\" ><div id=\"pg-gb1780-6a0591483d9b6-0\"  class=\"panel-grid panel-no-style\" ><div id=\"pgc-gb1780-6a0591483d9b6-0-0\"  class=\"panel-grid-cell\" ><div id=\"panel-gb1780-6a0591483d9b6-0-0-0\" class=\"so-panel widget widget_text panel-first-child panel-last-child\" data-index=\"0\" >\t\t\t<div class=\"textwidget\"><ul>\n<li>\u00a0R<sup>*<\/sup> = the rate of star formation, that is how many new stars are formed each year in our Milky Way<\/li>\n<li>\u00a0f<sub>p<\/sub> = the fraction of stars that have planets<\/li>\n<li>\u00a0n<sub>c<\/sub> = the average number of planets that can support life<\/li>\n<li>\u00a0f<sub>l<\/sub>\u00a0 = the fraction of planets that actually develop life<\/li>\n<li>\u00a0f<sub>i<\/sub>\u00a0 = the fraction of planets with life that have intelligent life<\/li>\n<li>\u00a0f<sub>c<\/sub> = the fraction of intelligent life that can communicate with us<\/li>\n<li>\u00a0L\u00a0 = the expected lifetime of the civilization<\/li>\n<\/ul>\n<\/div>\n\t\t<\/div><\/div><\/div><\/div>\n\n\n<p>Multiply all these numbers together, you will have a prediction of the number of alien civilization in our galaxy that can communicate with us.<\/p>\n\n\n\n<div style=\"height:48px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"468\" src=\"https:\/\/sites.ps.uci.edu\/mathceo\/wp-content\/uploads\/sites\/18\/2020\/05\/drake-equation2-1024x468.png\" alt=\"\" class=\"wp-image-1794\" srcset=\"https:\/\/sites.ps.uci.edu\/mathceo-old\/wp-content\/uploads\/sites\/18\/2020\/05\/drake-equation2-1024x468.png 1024w, https:\/\/sites.ps.uci.edu\/mathceo-old\/wp-content\/uploads\/sites\/18\/2020\/05\/drake-equation2-300x137.png 300w, https:\/\/sites.ps.uci.edu\/mathceo-old\/wp-content\/uploads\/sites\/18\/2020\/05\/drake-equation2-768x351.png 768w, https:\/\/sites.ps.uci.edu\/mathceo-old\/wp-content\/uploads\/sites\/18\/2020\/05\/drake-equation2-500x229.png 500w, https:\/\/sites.ps.uci.edu\/mathceo-old\/wp-content\/uploads\/sites\/18\/2020\/05\/drake-equation2-800x366.png 800w, https:\/\/sites.ps.uci.edu\/mathceo-old\/wp-content\/uploads\/sites\/18\/2020\/05\/drake-equation2.png 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption>By Luciano Ingenito<br><\/figcaption><\/figure>\n\n\n\n<p>Try putting in some numbers in the <a rel=\"noreferrer noopener\" href=\"https:\/\/www.wolframalpha.com\/input\/?i=drake+equation\" target=\"_blank\">Drake Equation Calculator<\/a> and see what you predict for the number of alien civilizations.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Frank Drake in 1961 tackled a most puzzling question: Does there exists any intelligent extra-terrestrial life in our Milky Way galaxy? Drake came up with a method to estimate how many alien civilizations can actually communicate with us. It is known as the Drake Equation and it multiplies together 7 numbers. Each number is denoted [&hellip;]<\/p>\n","protected":false},"author":16,"featured_media":1789,"parent":1736,"menu_order":3,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_vp_format_video_url":"","_vp_image_focal_point":[],"footnotes":""},"class_list":["post-1780","page","type-page","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/sites.ps.uci.edu\/mathceo-old\/wp-json\/wp\/v2\/pages\/1780","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sites.ps.uci.edu\/mathceo-old\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/sites.ps.uci.edu\/mathceo-old\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/sites.ps.uci.edu\/mathceo-old\/wp-json\/wp\/v2\/users\/16"}],"replies":[{"embeddable":true,"href":"https:\/\/sites.ps.uci.edu\/mathceo-old\/wp-json\/wp\/v2\/comments?post=1780"}],"version-history":[{"count":13,"href":"https:\/\/sites.ps.uci.edu\/mathceo-old\/wp-json\/wp\/v2\/pages\/1780\/revisions"}],"predecessor-version":[{"id":1796,"href":"https:\/\/sites.ps.uci.edu\/mathceo-old\/wp-json\/wp\/v2\/pages\/1780\/revisions\/1796"}],"up":[{"embeddable":true,"href":"https:\/\/sites.ps.uci.edu\/mathceo-old\/wp-json\/wp\/v2\/pages\/1736"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sites.ps.uci.edu\/mathceo-old\/wp-json\/wp\/v2\/media\/1789"}],"wp:attachment":[{"href":"https:\/\/sites.ps.uci.edu\/mathceo-old\/wp-json\/wp\/v2\/media?parent=1780"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}