{"id":12905,"date":"2009-03-13T09:21:00","date_gmt":"2009-03-13T16:21:00","guid":{"rendered":"https:\/\/dornsife.usc.edu\/news\/stories\/black-holes-eternal-prisons-no-more\/"},"modified":"2023-04-19T11:25:05","modified_gmt":"2023-04-19T18:25:05","slug":"black-holes-eternal-prisons-no-more","status":"publish","type":"post","link":"https:\/\/dornsife.usc.edu\/news\/stories\/black-holes-eternal-prisons-no-more\/","title":{"rendered":"Black Holes: Eternal Prisons No More"},"content":{"rendered":"\n\n\n    \n            \n\n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--article-hero \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--article-hero\"\n    \n      >\n\n    \n<div class=\"inner-wrapper\">\n  \n  \n  <div class=\"text-wrapper\">\n          <nav aria-label=\"Breadcrumb\" class=\"breadcrumbs\">\n        <ul>\n                      <li><a href=\"\/news\/stories\/\">News<\/a><\/li>\n                      <li><a href=\"\/news\/stories\/\/?category=student\">Student<\/a><\/li>\n                  <\/ul>\n      <\/nav>\n    \n              \n<div class=\"f--field f--page-title\">\n\n    \n  <h1>Black Holes: Eternal Prisons No More<\/h1>\n\n\n<\/div>\n    \n          <div class=\"subtitle\">\n            \n<div class=\"f--field f--description\">\n\n    \n  Stephen Hawking\u2019s lecture, a signature event of The College Commons\n\n\n<\/div>\n      <\/div>\n    \n           <strong class=\"author-field\"><span >By<\/span><a href=\"mailto:communication@dornsife.usc.edu\">Susan Andrews<\/a><\/strong>\n    \n          <span class=\"post-date-field\">March 13, 2009<\/span>\n      <\/div>\n<\/div>\n\n\n  <\/div><\/div>\n\n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--social-share \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--social-share\"\n    \n      >\n\n    \n  <div class=\"content-wrapper\">\n    <span class=\"a2a_kit a2a_kit_size_32 addtoany_list\" 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fill-rule=\"evenodd\" transform=\"translate(-6 -9)\"\/><\/svg>\n            <\/span>\n            <span class=\"a2a_label visually-hidden\">Email<\/span>\n          <\/a>\n                  <\/span>\n  <\/div>\n\n  <\/div><\/div>\n  \n\n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--rich-text \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--rich-text\"\n    \n      >\n\n    \n      \n<div class=\"f--field f--wysiwyg\">\n\n    \n  <p><div class=\"video-embed\"><iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/qDITMo6msMQ\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\"><\/iframe><\/div>\n<\/p>\n<p style=\"font-size: 11px; font-weight: bold; font-family: 'Lucida Grande', 'Lucida Sans Unicode', Verdana, sans-serif; margin: 0.8em 0;\">Stephen Hawking&rsquo;s lecture, a signature event of The College Commons. Video by Mira Zimet<\/p>\n<p><em>If you ever fall into a black hole, don&#8217;t give up. There is a way out! <br \/><\/em><\/p>\n<p>Celebrated physicist, Stephen Hawking, delivered an inspiring speech to a full house in Bovard Auditorium on March 10. USC College Dean Howard Gillman kicked off the event by introducing Nick Warner, professor of physics, mathematics and astronomy. Hawking was Warner&rsquo;s academic adviser while he studied at the University of Cambridge.<\/p>\n<p>Warner said that Hawking has contributed greatly to popularizing science with his successful book A Brief History of Time, which sold 10 million copies and focuses on black holes and the big bang theory. With a lifetime spent studying cosmology and black holes, Hawking&rsquo;s scientific prowess has also been captured by Hollywood in &ldquo;Star Trek,&rdquo; &ldquo;Futurama&rdquo; and &ldquo;The Simpsons&rdquo; television shows.<\/p>\n<p>&ldquo;Hawking has completely changed the way scientists think about black holes by first showing they are real natural phenomena and then giving us remarkable new insights into how quantum theory implies that they must evaporate,&rdquo; Warner said.<\/p>\n<p>Hawking&rsquo;s lecture focused on black holes, a term coined by American physicist John Wheeler. Hawking discussed the history of black holes beginning with British physicist John Michell in 1783, who suggested that there might be &ldquo;Dark Stars&rdquo; whose gravity is strong enough to trap light and prevent the stars from being seen from far away.<\/p>\n<p>Two Americans, Albert Michelson and Edward Morley, proved that the speed of light is invariant and does not depend upon where it comes from. Therefore, Michell&rsquo;s picture of Dark Stars is not entirely correct. Next, Albert Einstein weighed in with his theory of relativity where space and time are no longer independent entities, but rather different directions in four-dimensional space-time.<\/p>\n<p>Einstein&rsquo;s theory demonstrates that space-time is curved by the presence of matter. Hawking said it is like putting a heavy ball on a rubber sheet, the sheet bends and if you increase the weight of the ball then eventually, at a critical mass and size, the ball will make a bottomless hole in the sheet that particles can get into, but not out of. Stars do the same to the curving of space and time, and at a critical mass and size a star will collapse into a black hole.<\/p>\n<p>From outside a black hole, you cannot tell what is inside. Hawking noted that you can throw television sets, diamond rings or your worst enemy into a black hole &mdash; he is humorous as well as brilliant. All the black hole remembers is the total mass and the state of rotation.<\/p>\n<p>The boundary of a black hole is the event horizon where gravity is strong enough to pull light back. Hawking likened it to going over Niagara Falls in a canoe. If you are above the falls, you can get away if you paddle fast enough. But once over the edge you are lost, there is no way back.<\/p>\n<p>Hawking also described how he discovered that particles could slowly leak out of black holes and release energy. A miniature black hole of the mass of a mountain could generate enough power to supply the world&rsquo;s energy needs. However, the energy would be difficult to harness as the power could not be maintained in a power station. It would drop through the floor and end up at the center of the Earth.<\/p>\n<p>Scientists have searched for miniature black holes but to no avail. Hawking said this is a pity as he would have garnered a Nobel Prize. However, if a black hole is found through the Large Hadron Collider at CERN (the world&rsquo;s largest and highest-energy particle accelerator), he interjected humorously, he will get a Nobel Prize after all.<\/p>\n<p>Hawking also described how black holes seem to conflict with one of the fundamental ideas of science, namely determinism: That is, given enough detail about the state of the universe at present one can predict the future and reconstruct the past. The fact that black holes can absorb matter and then emit something completely different means that black holes appear to undermine determinism. However, Hawking believes he has found a resolution in the ideas of Richard Feynman, who believes that quantum theory involves looking at all possible alternative histories.<\/p>\n<p>This perspective also supports the idea that if you fall into a black hole, you may come out in another universe. If there is a large hole and if it is rotating, you may pass through it and into another universe. So, you cannot come back to our universe. Though Hawking said that he is keen on space flight, he is not willing to transport himself to another universe.<\/p>\n<p>Hawking said that the message from his talk is that black holes are not the eternal prisons once thought. If you feel you are in a black hole, don&rsquo;t give up. There is a way out.<\/p>\n<p>Warner and his colleagues selected questions from high school and USC students to ask Hawking following his talk. Warner said &ldquo;The questions were superb, sophisticated, subtle or simple, but important. Even a question was posed to Dr. Hawking &lsquo;Stephen, why are you so cool?&rsquo;&rdquo;<\/p>\n<p>To view Hawking&rsquo;s lecture in its entirety as well as the question and answer portion of the program, click on the video above.<\/p>\n<p><strong>About The College Commons<\/strong><br \/><a href=\"\/tcc\/\" target=\"_self\">The College Commons<\/a>, sponsored by USC College, is a series of provocative conversations that bring faculty and students together to explore the world of ideas. Join us for lectures and readings by distinguished scholars and writers, seminars focusing on works-in-progress, the examination of cultural artifacts and visits to local museums and collections. From fossils to physics, from poetry to plants, from the brilliant ideas of 1859 to the contemporary rethinking of &#8220;the creative commons,&#8221; the series offers opportunities for surprise, wonder and curiosity, the joy of a critical intelligence in conversation with others, as well as the sheer pleasure of learning what others in your community think is important &mdash; and learning why ideas matter to you. These events are open to all &mdash; and offer a wide world of discovery, debate and uncommon ideas.<\/p>\n<p><script type=\"text\/javascript\">\/\/ <![CDATA[\nfunction addStyle(styleString) {const style = document.createElement('style'); style.textContent = styleString; document.head.append(style);} addStyle(`div.story-img-container {display: none;}`);\n\/\/ ]]&gt;<\/script><\/p>\n\n\n\n<\/div>\n\n\n  <\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Stephen Hawking\u2019s lecture, a signature event of The College Commons<\/p>\n","protected":false},"author":0,"featured_media":12908,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[17],"tags":[261,96,93],"class_list":["post-12905","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-student","tag-astronomy","tag-natural-sciences","tag-physics"],"acf":[],"yoast_head":"<!-- This site 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