{"page":"\u003clink rel=\"stylesheet\" href=\"https://lessonplanet.com/assets/packs/css/resources-572d6a42.css\" /\u003e\n\u003clink rel=\"stylesheet\" href=\"https://lessonplanet.com/assets/packs/css/lp_boclips_stylesheets-f4d0de30.css\" media=\"all\" /\u003e\n\u003cdiv data-title='Gravitational Waves Are Awesome' data-url='/boclips/videos/5cdefb6ed7515d1ba708d323' data-video-url='/boclips/videos/5cdefb6ed7515d1ba708d323' id='bo_player_modal'\u003e\n\u003cdiv class='boclips-resource-page modal-dialog panel-container'\u003e\n\u003cdiv class='react-notifications-root'\u003e\u003c/div\u003e\n\u003cdiv class='rp-header'\u003e\n\u003cdiv class='rp-type'\u003e\n\u003ci aria-hidden='true' class='fai fa-regular fa-circle-play'\u003e\u003c/i\u003e\nVideo\n\u003c/div\u003e\n\u003ch1 class='rp-title' id='video-title'\u003e\nGravitational Waves Are Awesome\n\u003c/h1\u003e\n\u003cdiv class='rp-actions'\u003e\n\u003cdiv class='mr-1'\u003e\n\u003ca class=\"btn btn-success\" data-posthog-event=\"Signup: LP Signup Activity\" data-posthog-location=\"body_link_boclips\" data-remote=\"true\" href=\"/subscription/new\"\u003e\u003cspan\u003e\u003cspan\u003eGet Free Access\u003c/span\u003e\u003cspan class=\"\"\u003e for 10 Days\u003c/span\u003e\u003cspan\u003e!\u003c/span\u003e\u003c/span\u003e\u003c/a\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003cdiv class='rp-body'\u003e\n\u003cdiv class='rp-info'\u003e\n\u003cdiv aria-label='Hide resource details' class='rp-hide-info' role='button' tabindex='0'\u003e\u0026times;\u003c/div\u003e\n\u003ci aria-label='Expand resource details' class='rp-expand-info fai fa-solid fa-up-right-and-down-left-from-center' role='button' tabindex='0'\u003e\u003c/i\u003e\n\u003ci aria-label='Compress resource details' class='rp-compress-info fai fa-solid fa-down-left-and-up-right-to-center' role='button' tabindex='0'\u003e\u003c/i\u003e\n\u003cdiv class='rp-rating'\u003e\n\u003cspan class='resource-pool'\u003e\n\u003cspan class='pool-label'\u003ePublisher:\u003c/span\u003e\n\u003cspan class='pool-name'\u003e\n\u003cspan class='text'\u003e\u003ca data-publisher-id=\"30356161\" href=\"/search?publisher_ids%5B%5D=30356161\"\u003eDomain of Science\u003c/a\u003e\u003c/span\u003e\n\u003c/span\u003e\n\u003c/span\u003e\n\u003c/div\u003e\n\u003cdiv class='rp-description'\u003e\n\u003cspan class='short-description'\u003eEverything you need to know about gravitational waves. In February 2016 scientists announced the first detection of gravitational waves by humans on Earth. This was a huge, world changing, discovery. The gravitational waves were caused...\u003c/span\u003e\n\u003cspan class='full-description hide'\u003eEverything you need to know about gravitational waves. In February 2016 scientists announced the first detection of gravitational waves by humans on Earth. This was a huge, world changing, discovery. The gravitational waves were caused by a pair of colliding black holes 1.3 billion light years away 1.3 billion years ago. This video summaries all the of the mind blowing facts about the gravitational waves and describes LIGO, the incredibly sensitive telescope that detected them. If you would like to buy a poster you can get one \u003ca href='http://www.redbubble.com/people/dominicwalliman/works/24649310-gravitational-wave-astronomy?asc=u\u0026p=poster\u0026rel=carousel' target='_blank' rel='nofollow'\u003ehere\u003c/a\u003e Errata and clarifications. I endeavour to be as accurate as possible in my videos, but I am human and definitely don’t know everything, so there are sometimes mistakes. Also, because my videos are summaries of some quite complex science, I make simplifications. Some of these are intentional because I don’t have time to go into full detail, but sometimes they are unintentional and here is where I clear them up. 1. I got the month of the original detection wrong! It was September 2015, not November 2015. Silly me, my apologies. 2. “1.3 billion years ago, 1.3 billion light years away” This is incorrect and an oversight on my part. I completely forgot to take into account the expansion of the Universe. The resulting black hole is 1.3 billion light years from us today, but was closer to us when the collision happened, which means that it happened less than 1.3 billion years ago. I tried to work out exactly when but was stumped because I couldn’t find the function for the acceleration of the expansion of the universe. The redshift of the signal from the black holes was about 10%, so I thought the collision was 10% closer in time than 1.3 billion years i.e. 1.18 billion years, but I think it might be a bit more complicated than that. 3. LIGO schematic animation. I made a couple of silly errors here. The first circular mirror that the laser hits should be 90º to the way I oriented it: half the laser light is transmitted and half reflected, each one going up a different arm. 4. LIGO schematic animation. When the laser bounced back and forth it should bounce between the two suspended mirrors and not go all the way back to the diagonal mirror. 5. VIRGO is near Pisa, not at Trento as I drew on the map. I said the right thing but drew the wrong thing. My apologies. 6. ‘A second even more powerful collision.” Wrong again! The second collision was less powerful and the signal was more buried in the noise. I’m not happy with the number of flat out mistakes I made on this one! I will try better in the future. I blame it on the Christmas spirits. If you would like to find out more about gravitational waves and the detection here are the original papers and some very informative links. Main LIGO scientific \u003ca href='http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.116.061102' target='_blank' rel='nofollow'\u003epaper\u003c/a\u003e Supplementary LIGO \u003ca href='http://iopscience.iop.org/article/10.3847/2041-8205/818/2/L22' target='_blank' rel='nofollow'\u003epaper\u003c/a\u003e \u003ca href='http://physicsworld.com/cws/article/news/2016/feb/11/ligo-detects-first-ever-gravitational-waves-from-two-merging-black-holes' target='_blank' rel='nofollow'\u003eArticles\u003c/a\u003e \u003ca href='\u003ca href='http://www.nature.com/news/the-black-hole-collision-that-reshaped-physics-1.19612' target='_blank' rel='nofollow'\u003e\u003c/a\u003e' target='_blank' rel='nofollow'\u003e\u003c/a\u003e \u003ca href='http://www.businessinsider.com/black-hole-collision-energy-50-times-universe-2016-2' target='_blank' rel='nofollow'\u003e\u003c/a\u003e \u003ca href='http://www.space.com/33176-gravitational-waves-from-second-black-hole-collision.html' target='_blank' rel='nofollow'\u003e\u003c/a\u003e \u003ca href='http://www.ligo.org/science/Publication-GW150914/index.php' target='_blank' rel='nofollow'\u003e\u003c/a\u003e \u003ca href='http://www.nature.com/news/gravitational-waves-6-cosmic-questions-they-can-tackle-1.19337' target='_blank' rel='nofollow'\u003e\u003c/a\u003e \u003ca href='\u003ca href='http://www.nature.com/news/the-black-hole-collision-that-reshaped-physics-1.19612' target='_blank' rel='nofollow'\u003e\u003c/a\u003e' target='_blank' rel='nofollow'\u003e\u003c/a\u003e What they sound \u003ca href='http://www.vox.com/2016/6/15/11948618/ligo-gravitational-waves-black-hole-sound' target='_blank' rel='nofollow'\u003elike\u003c/a\u003e Also, if you enjoyed this video, you will probably like my science books, available in all good books shops around the work and is printed in 16 languages. Links are below or just search for Professor Astro Cat. They are fun children's books aimed at the age range 7-12. But they are also a hit with adults who want good explanations of science. The books have won awards and the app won a Webby. Frontiers of \u003ca href='http://nobrow.net/shop/professor-astro-cats-frontiers-of-space/' target='_blank' rel='nofollow'\u003eSpace\u003c/a\u003e Atomic \u003ca href='http://nobrow.net/shop/professor-astro-cats-atomic-adventure/' target='_blank' rel='nofollow'\u003eAdventure\u003c/a\u003e Intergalactic Activity \u003ca href='http://nobrow.net/shop/professor-astro-cats-intergalactic-activity-book/' target='_blank' rel='nofollow'\u003eBook\u003c/a\u003e Solar System \u003ca href='http://www.minilabstudios.com/apps/professor-astro-cats-solar-system/' target='_blank' rel='nofollow'\u003eApp\u003c/a\u003e Find me on twitter, instagram, and my \u003ca href='http://dominicwalliman.com' target='_blank' rel='nofollow'\u003ewebsite\u003c/a\u003e \u003ca href='https://twitter.com/DominicWalliman' target='_blank' rel='nofollow'\u003e\u003c/a\u003e \u003ca href='https://www.instagram.com/dominicwalliman' target='_blank' rel='nofollow'\u003e\u003c/a\u003e \u003ca href='https://www.facebook.com/dominicwalliman' target='_blank' rel='nofollow'\u003e\u003c/a\u003e\u003c/span\u003e\n\u003c/div\u003e\n\u003cdiv class='action-container flex justify-between'\u003e\n\u003cbutton aria-expanded='false' aria-label='Read more description' class='rp-full-description' type='button'\u003e\n\u003ci class='fai fa-solid fa-align-left'\u003e\u003c/i\u003e\n\u003cspan id='read_more'\u003eRead More\u003c/span\u003e\n\u003c/button\u003e\n\u003cdiv class='rp-report'\u003e\n\u003c/div\u003e\n\u003c/div\u003e\n\u003cdiv aria-labelledby='resource-details-heading' class='rp-info-section'\u003e\n\u003ch2 class='title' id='resource-details-heading'\u003eResource Details\u003c/h2\u003e\n\u003cdiv class='rp-resource-details clearfix'\u003e\n\u003cdiv class='detail'\u003e\n\u003cdl\u003e\n\u003cdt\u003eCurator Rating\u003c/dt\u003e\n\u003cdd\u003e\u003cspan class=\"star-rating\" aria-label=\"4.0 out of 5 stars\" role=\"img\"\u003e\u003ci class=\"fa-solid fa-star text-action\" aria-hidden=\"true\"\u003e\u003c/i\u003e\u003ci class=\"fa-solid fa-star text-action\" aria-hidden=\"true\"\u003e\u003c/i\u003e\u003ci class=\"fa-solid fa-star text-action\" aria-hidden=\"true\"\u003e\u003c/i\u003e\u003ci class=\"fa-solid fa-star text-action\" aria-hidden=\"true\"\u003e\u003c/i\u003e\u003ci class=\"fa-regular fa-star text-action\" aria-hidden=\"true\"\u003e\u003c/i\u003e\u003c/span\u003e\u003c/dd\u003e\n\u003c/dl\u003e\n\u003c/div\u003e\n\u003cdiv class='detail'\u003e\n\u003cdl\u003e\n\u003cdt class=\"educator-rating-title\"\u003eEducator Rating\u003c/dt\u003e\u003cdd\u003e\u003cdiv class=\"educator-rating-details\" data-path=\"/educator_ratings/rrp_data?resourceable_id=78932\u0026amp;resourceable_type=Boclips%3A%3AVideoMetadata\"\u003e\u003cspan class=\"not-yet-rated\"\u003eNot yet Rated\u003c/span\u003e\u003c/div\u003e\u003c/dd\u003e\n\u003c/dl\u003e\n\u003c/div\u003e\n\u003cdiv class='detail'\u003e\n\u003cdl\u003e\n\u003cdt\u003eGrade\u003c/dt\u003e\u003cdd title=\"Grade\"\u003e6th - 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