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Cosmic Ripples
 
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Ripples in the Cosmic Microwave Background can be compared to the ripples in fluids. The dispersed gas of the early universe has unique behaviors based upon its composition. The composition and the behavior of the inflation event generates a distinctive pattern of ripples. This pattern is detectable in the image we see in the Cosmic Microwave Background. Credit: NASA / WMAP Science Team
Views: 115 audiocreedvideos
Cosmic Ripples
 
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Ripples in the Cosmic Microwave Background can be compared to the ripples in fluids. The dispersed gas of the early universe has unique behaviors based upon its composition. The composition and the behavior of the inflation event generates a distinctive pattern of ripples. This pattern is detectable in the image we see in the Cosmic Microwave Background. credit: NASA / WMAP Science Team source: http://map.gsfc.nasa.gov/media/030658/index.html
Views: 318 djxatlanta
Ripples From The Big Bang: Listening to the Beginning of Time
 
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In March, a major breakthrough in understanding the origin of universe took the scientific community–and the general public–by storm. A team lead by astronomer John Kovac, using a powerful telescope at the South Pole, reported evidence of ripples in the fabric of space time produced by the big bang, a long-sought prediction of our most refined approach to cosmology, the inflationary theory. Amidst the worldwide celebration, though, some have been quietly suggesting that the champagne has been uncorked prematurely. Join a singular conversation, among the world’s most respected pioneers in cosmological theory and observation, that will explore the state of the art in the ongoing quest to understand the beginning of the universe. This program is part of the Big Ideas Series Subscribe to our YouTube Channel for all the latest from WSF. Visit our Website: http://www.worldsciencefestival.com/ Like us on Facebook: https://www.facebook.com/worldsciencefestival Follow us on twitter: https://twitter.com/WorldSciFest Original Program Date: May 30, 2014 Host: Brian Greene Participants: Andrei Linde, Alan Guth, Amber Miller, John Kovac, Paul Steinhardt Brian Greene's Introduction. 00:12 Participant Introductions. 20:34 Can we confirm that there are ripples in the fabric of space? 22:19 What did you find with BICEP2? 26:05 What is the inflationary theory? 31:46 What is making the universe accelerate? 37:33 What were the main issues with the inflationary theory? 44:42 What is chaotic inflation? 51:22 How do we calculate density motivations? 59:00 Looking for cosmic fluctuation. 1:03:40 How close were the predictions to the observations? 1:09:03 How confident are you that the swirls are coming from quantum fluctuations? 1:14:40 What are the concerns about the inflationary theory? 1:23:49 Final thoughts. 1:29:33
Views: 170414 World Science Festival
The Original Double Slit Experiment
 
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Light is so common that we rarely think about what it really is. But just over two hundred years ago, a groundbreaking experiment answered the question that had occupied physicists for centuries. Is light made up of waves or particles? The experiment was conducted by Thomas Young and is known as Young's Double Slit Experiment. This famous experiment is actually a simplification of a series of experiments on light conducted by Young. In a completely darkened room, Young allowed a thin beam of sunlight to pass through an aperture on his window and onto two narrow, closely spaced openings (the double slit). This sunlight then cast a shadow onto the wall behind the apparatus. Young found that the light diffracted as it passed through the slits, and then interfered with itself, created a series of light and dark spots. Since the sunlight consists of all colours of the rainbow, these colours were also visible in the projected spots. Young concluded that light consist of waves and not particles since only waves were known to diffract and interfere in exactly the manner that light did in his experiment. The way I have always seen this experiment performed is with a laser and a manufactured double slit but since the experiment was conducted in 1801 I have always thought that it should be possible to recreate the experiment using sunlight and household materials. That is basically what I did here. I will show the interference pattern I observed with my homemade double slit on 2Veritasium but I chose to use a manufactured double slit here to ensure that the pattern was impressive for observers at the beach. Special thanks to Henry, Brady, and Rupert for their cameos, Glen for filming and Josh for helping create the apparatus. Thanks also to the Royal Society for allowing us to view the original manuscript of Young's lecture and the University of Sydney for lending the double slits. Music by Kevin Mcleod (incompetech.com) Danse Macabre, Scissors
Views: 3283577 Veritasium
The Sound of the Big Bang
 
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A decade ago, American physics professor John Cramer released an audio file -- the sound of the Big Bang. Now with new data from ESA's Planck mission Cramer reran his simulation and released this hi-fidelity version. What you here is a sound wave calculated from the cosmic background radiation spectrum, extrapolated back and forth in time to gain a 50 seconds version of the theorized sound waves for the first 760,000 years after the Big Bang. During that time the universe was dense enough to carry sound waves similar to Earth's atmosphere. If this is at least similar to what was really going on in terms of sound of the Big Bang could be revealed by a LISA-class mission, expected to launch in 2028. For the very first time we will then be able to listen to the tiny fluctuations in spacetime caused by accelerated matter. This will tell us about the dark side of our Universe, yet unknown objects, and maybe even about the Big Bang itself. Sound: © 2013 by John G. Cramer, University of Washington, http://faculty.washington.edu/jcramer/BBSound_2013.html Music: First Hero by Vera Ohl, musicfox UG Video: NASA, ESA and the Planck Collaboration, AEI / Milde Marketing / Exozet
Views: 92807 LISA Mission
The Uncertainty Over Gravitational Waves
 
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In this clip from the 2014 World Science Festival program "Ripples from the Big Bang: Listening to the Beginning of Time," BICEP2 researcher John Kovac explains the limits of his team's discovery, published last March, of a polarization pattern in the cosmic microwave background radiation. The team thought the pattern was a sign of gravitational ripples in space-time—and consequently, evidence for the theory of cosmic inflation. But now new data from the Planck satellite suggests that pattern was almost entirely due to dust in the Milky Way. Watch the Full Program Here: https://youtu.be/70Y1Dri0umI Original Program Date: May 30, 2014 Subscribe to our YouTube Channel for all the latest from WSF. Visit our Website: http://www.worldsciencefestival.com/ Like us on Facebook: https://www.facebook.com/worldsciencefestival Follow us on twitter: https://twitter.com/WorldSciFest
Background radiation - Video Learning - WizScience.com
 
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"Background radiation" is the ubiquitous ionizing radiation that people on the planet Earth are exposed to, including natural and artificial sources. Both natural and artificial background radiation varies depending on location and altitude. Radioactive material is found throughout nature. Detectable amounts occur naturally in soil, rocks, water, air, and vegetation, from which it is inhaled and ingested into the body. In addition to this "internal exposure", humans also receive "external exposure" from radioactive materials that remain outside the body and from cosmic radiation from space. The worldwide average natural dose to humans is about 2.4 millisievert per year. This is four times the worldwide average artificial radiation exposure, which in 2008 amounted to about 0.6 mSv per year. In some rich countries, like the US and Japan, artificial exposure is, on average, greater than the natural exposure, due to greater access to medical imaging. In Europe, average natural background exposure by country ranges from under 2 mSv annually in the United Kingdom to more than 7 mSv annually for some groups of people in Finland. The biggest source of natural background radiation is airborne radon, a radioactive gas that emanates from the ground. Radon and its isotopes, parent radionuclides, and decay products all contribute to an average inhaled dose of 1.26 mSv/a . Radon is unevenly distributed and varies with weather, such that much higher doses apply to many areas of the world, where it represents a significant health hazard. Concentrations over 500 times the world average have been found inside buildings in Scandinavia, the United States, Iran, and the Czech Republic. Radon is a decay product of uranium, which is relatively common in the Earth's crust, but more concentrated in ore-bearing rocks scattered around the world. Radon seeps out of these ores into the atmosphere or into ground water or infiltrates into buildings. It can be inhaled into the lungs, along with its decay products, where they will reside for a period of time after exposure. Wiz Science™ is "the" learning channel for children and all ages. SUBSCRIBE TODAY Disclaimer: This video is for your information only. The author or publisher does not guarantee the accuracy of the content presented in this video. USE AT YOUR OWN RISK. Background Music: "The Place Inside" by Silent Partner (royalty-free) from YouTube Audio Library. This video uses material/images from https://en.wikipedia.org/wiki/Background+radiation, which is released under Creative Commons Attribution-Share-Alike License 3.0 http://creativecommons.org/licenses/by-sa/3.0/ . This video is licensed under Creative Commons Attribution-Share-Alike License 3.0 http://creativecommons.org/licenses/by-sa/3.0/ . To reuse/adapt the content in your own work, you must comply with the license terms. Wiz Science™ is "the" learning channel for children and all ages. SUBSCRIBE TODAY Disclaimer: This video is for your information only. The author or publisher does not guarantee the accuracy of the content presented in this video. USE AT YOUR OWN RISK. Background Music: "The Place Inside" by Silent Partner (royalty-free) from YouTube Audio Library. This video uses material/images from https://en.wikipedia.org/wiki/Background+radiation, which is released under Creative Commons Attribution-Share-Alike License 3.0 http://creativecommons.org/licenses/by-sa/3.0/ . This video is licensed under Creative Commons Attribution-Share-Alike License 3.0 http://creativecommons.org/licenses/by-sa/3.0/ . To reuse/adapt the content in your own work, you must comply with the license terms.
Views: 232 Wiz Science™
Why the Big Bang Definitely Happened | Space Time | PBS Digital Studios
 
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How physics lets us rewind time to the beginning of the universe. Get your own Space Time t-shirt at http://bit.ly/1QlzoBi Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: http://www.reddit.com/r/pbsspacetime Support us on Patreon! http://www.patreon.com/pbsspacetime Help translate our videos! http://www.youtube.com/timedtext_cs_panel?tab=2&c=UC7_gcs09iThXybpVgjHZ_7g We pretty much know for sure that the universe was once extremely small, and extremely hot. And we know that something set it in motion, expanding rapidly and continuing to do-so today. But the actual moment of ‘the Big Bang’ is still a bit of a grey area within physics. The theories of general relativity and quantum mechanics disagree on this pivotal “beginning of time,” and physicists continue to search for an all-encompassing theory to unify the study of our universe. On this week’s Space Time, we begin to discuss the current state of the Big Bang Theory, and where it could go from here. FURTHER READING: Overview of Big Bang theory https://en.wikipedia.org/wiki/Big_Bang Timeline of the Big Bang https://en.wikipedia.org/wiki/Chronol... MinutePhysics made a truly superb video on what the Big Bang really is: https://www.youtube.com/watch?v=q3MWR... Kurzgesagt does a great job describing some of the events of the very early universe: https://www.youtube.com/watch?v=wNDGg... _____________________ COMMENTS: Brendon Binns https://www.youtube.com/watch?v=gw-i_VKd6Wo&lc=z12ivbbraz3xxdwj304citqwksadvr2pkik David Mulyk https://www.youtube.com/watch?v=gw-i_VKd6Wo&lc=z12wjbig0kq0z5gni22mgbdquvztil2ti John Proctor https://www.youtube.com/watch?v=gw-i_VKd6Wo&lc=z123yzqjqtvkxvcil04cjnjzkx3fufiisac Lawrence Stanley https://www.youtube.com/watch?v=gw-i_... ______________________ Written and hosted by Matt O’Dowd Made by Kornhaber Brown (www.kornhaberbrown.com)
Views: 747628 PBS Space Time
How Scientists Are Looking For Ripples In Spacetime
 
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We are constantly searching for evidence of the Big Bang. One form of proof could be gravitational waves, but how do we go about finding them? Read some of Ian’s recent articles: http://news.discovery.com/contributors/ian-oneill.htm Follow Ian on Twitter: https://twitter.com/astroengine Read More: Dialing In To Noise http://eands.caltech.edu/2015/03/19/dialing-in-to-noise/ “In their search for gravitational waves—stretches in space-time produced by dramatically violent events in the distant universe—researchers at the Laser Interferometer Gravitational-Wave Observatory (LIGO) have created some of the most sensitive detectors in the world.” ____________________ DNews is dedicated to satisfying your curiosity and to bringing you mind-bending stories & perspectives you won't find anywhere else! New videos twice daily. Watch More DNews on TestTube http://testtube.com/dnews Subscribe now! http://www.youtube.com/subscription_center?add_user=dnewschannel DNews on Twitter http://twitter.com/dnews Trace Dominguez on Twitter https://twitter.com/tracedominguez Julia Wilde on Twitter https://twitter.com/julia_sci DNews on Facebook https://facebook.com/DiscoveryNews DNews on Google+ http://gplus.to/dnews Discovery News http://discoverynews.com Download the TestTube App: http://testu.be/1ndmmMq
Views: 93771 Seeker
Afterglow: Dispatches from the Birth of the Universe
 
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Cosmology is the one field in which researchers can—literally—witness the past. The cosmic background radiation, ancient light streaming toward us since the Big Bang, provides a pristine window onto the birth and evolution of the universe. Already, the radiation has been key to confirming an early explosive expansion of space, determining the geometric shape of the universe and identifying seeds that resulted in galaxies. Now, the cosmic background radiation is poised to reveal when the first stars formed, what happened in the fraction of a second after the Big Bang, and the answers to a host of other bold questions about the cosmos. Join Nobel Laureate John Mather and other leading scientists who are leading the way. The World Science Festival gathers great minds in science and the arts to produce live and digital content that allows a broad general audience to engage with scientific discoveries. Our mission is to cultivate a general public informed by science, inspired by its wonder, convinced of its value, and prepared to engage with its implications for the future. Subscribe to our YouTube Channel for all the latest from WSF. Visit our Website: http://www.worldsciencefestival.com/ Like us on Facebook: https://www.facebook.com/worldsciencefestival Follow us on twitter: https://twitter.com/WorldSciFest Original Program Date: May 31, 2012 MODERATOR: Lawrence Krauss PARTICIPANTS: John C. Mather, Amber Miller, Lyman Page, David Spergel Lawrence Krauss's Introduction 00:21 Robert Woodrow Wilson: Tuning in to the Big Bang 10:31 Participant introductions. 18:10 What lead you to the path of science? 20:45 Launching the COBE satellite. 32:45 Measuring temperatures 1/100,000 of three degrees. 36:50 When your wrong ... you move on. 41:34 The boomerang experiment from Antarctica. 46:54 How big is the universe? 52:43 How far back in time can we see? 58:54 Amber Miller and the EBEX project. 1:02:14 Polarization from gravity waves from the beginning of time. 1:06:16 What is the future of measuring the universe? 1:12:26 What is a microwave? Are we sure matter exists? 1:20:54
Views: 57142 World Science Festival
BICEP2 Data Say "YES" to Fractal Multiverse but are then withdrawn.
 
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http://SimeonHein.com After posting this video new evidence came forward that the BICEP2 result was no longer accepted and could be explained by cosmic dust or other sources. See this article: https://physicsworld.com/a/galactic-dust-sounds-death-knell-for-bicep2-gravitational-wave-claim/ This shows us the scientific results need to be checked and rechecked by other parties than the scientists involved in the original study. We may still live in fractal multiverse but this BICEP2 study doesn't prove that. This is HUGE. New data from the Antarctic research station BICEP2 supports the idea of the Big Bang, gravitational waves, and a non-uniform cosmic background radiation. Leading astrophysicists like Andrei Linde say that this result strongly suggests the idea of "eternal inflation" and a Multiverse with many different sub-universes of which we are one. This may also imply the existence of "weak coupling" and phenomena like remote viewing allowing interaction between Multiverses. (All material by Simeon Hein except "History of the Universe" public domain image originally created by the National Science Foundation.) Dr. Simeon Hein is the author of the Amazon best-selling books OPENING MINDS and PLANETARY INTELLIGENCE.
Views: 2286 Simeon Hein
What Happens At The Edge Of The Universe? | Space Time | PBS Digital Studios
 
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Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: http://www.reddit.com/r/pbsspacetime Support us on Patreon! http://www.patreon.com/pbsspacetime Help translate our videos! http://www.youtube.com/timedtext_cs_panel?tab=2&c=UC7_gcs09iThXybpVgjHZ_7g Lots of people believe the Universe is infinite, but there's a good possibility that might not be the case. Which means that there would be an actual edge of the Universe. What happens at that edge? Is there a restaurant? Join Matt on this week’s episode of Space Time as he explores the greatest expanses of our Universe. So what do you find when you reach the edge? More Universe? Bubble Universes? Back where you started?! Check out this episode of Space Time to find out! Measuring The Size of The Universe: https://www.youtube.com/watch?v=QXfhGxZFcVE Space Used To Be Orange: https://www.youtube.com/watch?v=3tCMd1ytvWg ----------------------------------------­­--------- COMMENTS: Squishina https://www.youtube.com/watch?v=z3rgl-_a5C0&lc=z130vh1yaynszzt3y22ixvba5zazinoj204 shadowmax889 https://www.youtube.com/watch?v=z3rgl-_a5C0&lc=z13ptl1hwkujhnv3o23tx1qyiu2xdxyxl04 MrLewooz https://www.youtube.com/watch?v=z3rgl-_a5C0&lc=z13nd5lpupycwdv3w22hjruqrpnyjj3qs04 izvarzone https://www.youtube.com/watch?v=z3rgl-_a5C0&lc=z12jize5xo3luluvj22vet1ynz2cwh0hu04 ----------------------------------------­­--------- REFERENCES: Krauss & Scherrer 2007 http://arxiv.org/abs/0704.0221 Vardanyan, Trotta & Silk, 2011 http://arxiv.org/abs/1101.5476 ----------------------------------------­­--------- Let us know what topics you want to learn more about:http://bit.ly/spacetimepoll
Views: 5417057 PBS Space Time
Were Scientists Wrong About The Big Bang?
 
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Back in March, scientists announced the discovery of gravitational waves and evidence for the Big Bang! What are gravitational waves, and is their evidence real? Dr. Ian O'Neill joins DNews to break down this complex concept. Follow Ian on Twitter: https://twitter.com/astroengine Read Some of Ian's Recent Stories: http://news.discovery.com/contributors/ian-oneill.htm Read More: BICEP2 2014 Release Image Gallery http://bicepkeck.org/visuals.html "Gravitational waves from inflation generate a faint but distinctive twisting pattern in the polarization of the CMB, known as a "curl" or B-mode pattern." WMAP image of the CMB anisotrophy http://en.wikipedia.org/wiki/Introduction_to_general_relativity#mediaviewer/File:WMAP_image_of_the_CMB_anisotropy.jpg "Image of radiation emitted no more than a few hundred thousand years after the big bang, captured with the satellite telescope WMAP." The Big Bang http://svs.gsfc.nasa.gov/vis/a010000/a010100/a010128/ "This dominant cosmological theory suggests the Universe began nearly 13.7 billion years ago, expanding rapidly from a very dense and incredibly hot state. Eventually, stars ignited and galaxies slowly formed." Watch More: Proving the Big Bang Theory https://www.youtube.com/watch?v=becPAiAmFNo TestTube Wild Card http://testtube.com/dnews/dnews-398-baby-talk-actually-makessense?utm_source=YT&utm_medium=DNews&utm_campaign=DNWC How Big Is the Universe? https://www.youtube.com/watch?v=hz0KGVwGwXQ ____________________ DNews is dedicated to satisfying your curiosity and to bringing you mind-bending stories & perspectives you won't find anywhere else! New videos twice daily. Watch More DNews on TestTube http://testtube.com/dnews Subscribe now! http://www.youtube.com/subscription_center?add_user=dnewschannel DNews on Twitter http://twitter.com/dnews Trace Dominguez on Twitter https://twitter.com/tracedominguez Tara Long on Twitter https://twitter.com/TaraLongest Laci Green on Twitter http://twitter.com/gogreen18 DNews on Facebook https://facebook.com/DiscoveryNews DNews on Google+ http://gplus.to/dnews Discovery News http://discoverynews.com Download the TestTube App: http://testu.be/1ndmmMq
Views: 173020 Seeker
10 TYPES OF SPACE TELESCOPES YOU DONT KNOW
 
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10 types of space telescopes you don't know 1.Gamma ray Gamma ray astronomy 2.X-ray X-ray telescopes measure high-energy photons called X-rays. These can not travel a long distance through the atmosphere, meaning that they can only be observed high in the atmosphere or in space. 3.Ultraviolet Ultraviolet telescopes make observations at ultraviolet wavelengths, i.e. between approximately 10 and 320 nm. Light at these wavelengths is absorbed by the Earth's atmosphere, so observations at these wavelengths must be performed from the upper atmosphere or from space. 4.Visible The oldest form of astronomy, optical or visible-light astronomy extends from approximately 400 to 700 nm.[116] Positioning an optical telescope in space means that the telescope does not see any atmospheric effects (see astronomical seeing), providing higher resolution images. 5.Infrared Infrared light is of lower energy than visible light, hence is emitted by cooler objects. 6. Submillimiter Space-based observations at the submillimetre wavelengths remove the ground-based limitations of atmospheric absorption. The Submillimeter Wave Astronomy Satellite (SWAS) was launched into low Earth orbit on December 5, 1998 as one of NASA's Small Explorer Program (SMEX) missions. 7.Radio As the atmosphere is transparent for radio waves, radio telescopes in space are of most use for Very Long Baseline Interferometry; doing simultaneous observations of a source with both a satellite and a ground-based telescope and by correlating their signals to simulate a radio telescope the size of the separation between the two telescopes. 8.Particle detection Spacecraft and space-based modules that do particle detection, looking for cosmic rays and electrons. These can be emitted by the sun (Solar Energetic Particles), our galaxy (Galactic cosmic rays) and extragalactic sources (Extragalactic cosmic rays). 9.Gravitational waves A proposed new type of telescope is one that detects gravitational waves; ripples in space-time generated by colliding neutron stars and black holes. 10.Microwave Microwave space telescopes have primarily been used to measure cosmological parameters from the Cosmic Microwave Background. They also measure synchrotron radiation, free-free emission and spinning dust from our Galaxy, as well as extragalactic compact sources and galaxy clusters through the Sunyaev-Zel'dovich effect.
Views: 4104 Being Infollegent
cosmic background radiation pt 1
 
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Questions for homework 4 questions 1. What type of waves are the cosmic background radiation? 2. Why are the waves stretched out? 3. what temperature did Gamow predict? 4. What temperature did they discover the CBR to be?
Views: 280 Takata Science
Gravitational Waves: Proof of the Big Bang
 
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It is being described as the 'Holy Grail' of cosmology. Scientists in the United States believe they have identified an echo of so-called gravitational waves - signals left in the immediate aftermath of the Big Bang, when the Universe came into existence some 14 billion years ago. Using a telescope at the South Pole designed to measure the cosmic background radiation left over from the Big Bang, they found evidence of the existence of gravitational waves... euronews knowledge brings you a fresh mix of the world's most interesting know-hows, directly from space and sci-tech experts. Subscribe for your dose of space and sci-tech: http://eurone.ws/Y9QTy3 Made by euronews, the most watched news channel in Europe.
Views: 496 euronews Knowledge
Our Cosmic Mistake About Gravitational Waves
 
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Two years ago, we reported on a finding that was later disproved! What have we learned about gravitational waves since then? How We Know The Big Bang Actually Happened - https://youtu.be/becPAiAmFNo Were Scientists Wrong About The Big Bang? - https://youtu.be/fytASaGxyWw Sign Up For The Seeker Newsletter Here - http://bit.ly/1UO1PxI Read More: IT'S OFFICIAL: Gravitational waves have been detected, Einstein was right http://www.sciencealert.com/live-update-big-gravitational-wave-announcement-is-happening-right-now "After 100 years of searching, an international team of physicists has confirmed the existence of Einstein's gravitational waves, marking one of the biggest astrophysical discoveries of the past century. It's a huge deal, because it not only improves our understanding of how the Universe works, it also opens up a whole new way of studying it." Big Bang, Inflation, Gravitational Waves: What It Means http://www.seeker.com/big-bang-inflation-gravitational-waves-what-it-means-1768386150.html "Etched into the most ancient radiation that pervades the entire universe and created - literally - at the dawn of time, gravitational waves have been directly observed, giving us a glimpse as to the nature of the inflationary period that is theorized to have caused the rapid growth of our universe just after the Big Bang." Gravitational Waves Discovery Now Officially Dead https://www.scientificamerican.com/article/gravitational-waves-discovery-now-officially-dead1/ "The European Space Agency (ESA) announced the long-awaited results on January 30, a day after a summary of it had been unintentionally posted online by French members of the Planck satellite team and then widely circulated before it was taken down." ____________________ DNews is dedicated to satisfying your curiosity and to bringing you mind-bending stories & perspectives you won't find anywhere else! New videos daily. Watch More DNews on Seeker http://www.seeker.com/show/dnews/ Subscribe now! http://www.youtube.com/subscription_center?add_user=dnewschannel Seeker on Twitter http://twitter.com/seeker Trace Dominguez on Twitter https://twitter.com/tracedominguez DNews on Facebook https://facebook.com/DiscoveryNews DNews on Google+ https://plus.google.com/u/0/+dnews Seeker http://www.seeker.com/ Sign Up For The Seeker Newsletter Here: http://bit.ly/1UO1PxI Special thanks to Ian O'Neill for hosting and writing this episode of DNews! Check Ian out on Twitter: https://twitter.com/astroengine
Views: 78832 Seeker
Teach Astronomy - Microwave Background Fluctuation
 
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http://www.teachastronomy.com/ In 1989 the Cosmic Background Explorer satellite or COBE detected tiny fluctuations in the cosmic background radiation for the first time. Astronomers were very excited by this discovery because it had been a prediction of the big bang model that there should be fluctuations. They were at a very low level of only ten to the minus five fractionally. So the background radiation does not have exactly the same intensity or temperature in every direction in space. These fluctuations represent the seeds for galaxy formation. The microwave background is a view of the universe at an age of only three hundred thousand years after the big bang, a tiny fraction of its present age. The background fluctuations are the seeds out of which galaxies will eventually form, a process which takes billions of years. They're tiny ripples in the intensity of the background. In the analogy of a pond that's a hundred meters across the ripples would only be about a millimeter high.
Views: 159 Teach Astronomy
Astronomers Measure Small Ripples In The Cosmic Web For The First Time
 
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Matter in the universe is distributed in a network of filaments known as the cosmic web. The biggest clusters of galaxies form nodes with dark matter and gas stretching in tendrils between them. Never miss a talk! SUBSCRIBE to The Science Channel: http://bit.ly/thesciencepodcast . Read more: http://www.sciencesonic.com . You may love:
Big Bang Theory Wrong Again
 
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BY ZenoEffect. Also worth reading: 'Echoes' of the Big Bang Misinterpreted? http://news.discovery.com/space/cosmic-background-radiation-big-bang-120615.htm Higgs Boson & Big Bang: Large Hadron Collider Data Challenges Cosmic 'Inflation' Theory http://www.huffingtonpost.com/2013/04/16/higgs-big-bang-lhc-cosmic-inflation_n_3093057.html "Our best fitting model, our best theory has a problem fitting the data" Planck space telescope creates the most detailed map ever created of the cosmic microwave background, supposedly a relic radiation from the Big Bang reveals the existence of features that challenge the foundations of our current understanding of the Universe.
Views: 993 iftikhar uddin
Gravitational Waves The Big Bang's Smoking Gun | Exploring Nature
 
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Gravitational Waves The Big Bang's Smoking Gun | Exploring Nature Gravitational Waves The Big Bang's Smoking Gun. The historic discovery of gravitational waves of September 2015 has won the Nobel Prize for Physics. Half of the prize goes to physicists Kip Thorne and Barry Barish of Caltech, with half going to Rainer Weiss for their roles in the discovery. Gravitational waves are the "smoking gun" of the Big Bang. Predicted by Albert Einstein's theory of general relativity in 1916, a massive object like Earth distorts space-time around it like a bowling ball dropped on a trampoline. The larger the object, the more space-time is distorted by it. If a marble were circling around the bowling ball on the dimpled trampoline, it would fall inward, toward the bowling ball, like a rock in space circling a planet. Gravitational waves are ripples in space-time that travel outward from a source. Scientists think that powerful gravitational waves are created when two extremely dense objects — like a pair of neutron stars or a black hole and a neutron star — orbit one another in binary pairs. The interaction of those two objects swirl space-time, creating ripples that theoretically can be measured using powerful instrumentation. 1. Background noise In 2014, the Harvard-Smithsonian Center for Astrophysics found a faint signal in the cosmic microwave background radiation (CMB). They announced that the signal signified the first direct evidence of gravitational waves ever discovered. Gravitational waves were the last untested part of Einstein's general theory of relativity. Unfortunately, the signal detected by their research could be explained by dust in the Milky Way. However, the announcement highlighted one method for spotting gravitational waves. The rapid expansion of the universe (called inflation) right after the Big Bang nearly 13.8 billion years ago could have produced ripples in the CMB — the cosmic fog that fills the universe and represents the earliest detectable radiation. If spotted in the future, such ripples would further support the idea that the universe went through a huge period of inflation a fraction of a second after the Big Bang. 2. Cosmic inflation CMB radiation came into existence about 380,000 years after the Big Bang. Scientists have mapped the CMB across the sky and found that it is a uniform temperature, evidence that bolsters cosmic inflation theory. "Why the cosmic microwave background temperature is the same at different spots in the sky would be a mystery if it was not for inflation saying, well, our whole sky came from this tiny region," Chuck Bennett, principal investigator of NASA's Wilkinson Microwave Anisotropy Probe (WMAP) mission, told Space.com in 2013. "So the idea of inflation helps answer some of these mysteries, and it explains where these fluctuations came from." 3. Smoking gun In 2016, the Advanced LIGO (Laser Interferometer Gravitational Wave Observatory) announced its first (and then its second) clear detection of gravitational waves. The discovery was met with excitement by both the general public and the scientific community. The first announcement, made in February 2016, revealed the historic confirmed detection made in September 2015. A pair of black holes, weighing in at 29 and 36 times the mass of the sun, merged into a single object, producing the ripples in space-time that LIGO detected. The September signal was the first detection of binary black holes. The LIGO team announced a second gravitational wave signal, which the pair of instruments detected on December 26, 2015. Like the first, the signal is thought to have come from a pair of colliding black holes. The crashing twin pairs are far from the largest black holes. The supermassive black hole at the center of the Milky Way weighs in at over 4 million times the mass of the sun. The intermediate mass black holes are more challenging to explain than their larger siblings. "The 29 and 30-plus solar masses come as an unusual surprise. If you look at most binary stars in [the Milky Way] galaxy, given the composition of the stars, we don't expect black holes of this mass," black hole scientist and LIGO team member Vicky Kalogera told Space.com soon after the first discovery. "The higher mass tells us that these binary black holes formed from a particular environment [with a] metallicity that is different than [the sun's] metallicity." As LIGO continues to study space-time, and as more detectors come online (such as one proposed by India), scientists will improve their understanding of intermediate black holes and black hole pairs.
Views: 29 Exploring Nature
The Hunt for the First Neutrinos in the Universe | Cosmic Neutrino Background
 
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The Cosmic Microwave Background shows us the oldest light in the universe, but to really understand the early universe we need something even older: The Cosmic Neutrino Background. Host: Reid Reimers For special, curated artifacts of this universe, check out https://scishowfinds.com/ ---------- Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow ---------- Dooblydoo thanks go to the following Patreon supporters: Lazarus G, Sam Lutfi, Nicholas Smith, D.A. Noe, سلطان الخليفي, Piya Shedden, KatieMarie Magnone, Scott Satovsky Jr, Charles Southerland, Patrick D. Ashmore, Tim Curwick, charles george, Kevin Bealer, Chris Peters ---------- Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: http://dftba.com/scishow ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow ---------- Sources: http://iopscience.iop.org/article/10.1088/1742-6596/580/1/012040/pdf https://www.forbes.com/sites/startswithabang/2016/09/09/cosmic-neutrinos-detected-confirming-the-big-bangs-last-great-prediction/#1677c0ee30c7 https://arstechnica.com/science/2015/09/signs-of-neutrinos-from-the-dawn-of-time-less-than-a-second-after-the-big-bang/ https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.95.011305 http://www.ras.org.uk/news-and-press/89-news2005/794-ripples-in-cosmic-neutrino-background-measured-for-the-first-time https://authors.library.caltech.edu/58929/1/1.4915587.pdf https://www.energy.gov/sites/prod/files/2015/07/f24/The%20Princeton%20Tritium%20Observatory%20for%20Light%2C%20Early%20Universe%2C%20Massive%20Neutrino%20Yield%20%28PTOLEMY%29.pdf http://inspirehep.net/record/1607470/files/PoS(NOW2016)092.pdf https://www.princeton.edu/news/2016/03/14/hunt-big-bang-neutrinos-may-provide-fresh-insight-origin-universe http://s3.amazonaws.com/sf-web-assets-prod/wp-content/migration/sf/report2015/stories/ptolemy.html ------ Images: https://commons.wikimedia.org/wiki/File:Ilc_9yr_moll4096.png https://apod.nasa.gov/apod/ap130325.html https://images.nasa.gov/details-GSFC_20171208_Archive_e000125.html
Views: 87073 SciShow Space
Have we found evidence that we live in a holographic universe ?
 
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Have we found evidence that we live in a holographic universe ? https://youtu.be/_jGrZ3iZWuU Script: Have we found evidence that we live in a holographic universe? A new analysis has prompted claims of significant evidence having been discovered that our universe is a hologram. Is it really, wonders Geraint Lewis. The holographic universe, an idea born out of the seemingly endless quest to reconcile our understanding of gravity with the other fundamental forces of nature, has raised its head again, with the claim that “significant evidence” has been found that we live in a hologram. The notion of a holographic universe comes from a mathematical quirk buried in string theory, which is our leading attempt at a theory of everything. This quirk says that within a particular kind of cosmos, we can effectively do away with troublesome gravity by reducing the number of dimensions in our mathematical description by one. You can think about the resulting universe as information “painted” over a “cosmological surface”, which then permeates into other dimensions, creating the physical cosmos – akin to a hologram, a 3D image created from information in a 2D pattern. The result of the holographic principle would be that gravity and our third spatial dimension could be regarded as “illusions”. While recent calculation has shown that the principle might hold in universes like our own, the question on everyone’s lips is, “How would we know?” Unfortunately, our day-to-day experience, with three dimensions of space and one of time, would be the same whether the universe was holographic or not, and we have to look into the realm of the quantum to try to see its impact. But all is not lost. Various attempts are being made to do just this. Embryonic universe. And so to the latest reports of significant evidence for this strange reality. These spring from a paper that worries about the fuzziness of space and time, not now, but in the initial instants of the universe. In our standard cosmological model, the embryonic universe has a particular pattern of fluctuating energy, like the ripples on a pond. In the rival holographic universe model, the pattern of these energy ripples is different. In both kinds of universe, these energy fluctuations are accentuated by the expansion of the universe and are seen on the sky we observe today as the cosmic microwave background (CMB) radiation, captured in fine detail by the Planck spacecraft. Just how “significant” is the evidence in this research for the holographic universe? Looking beyond the headlines, the significance is less clear, and the best that can be said is that the theory does as well as our standard model in accounting for some of the observations of the CMB, but does a poorer job when considering all CMB data. What this really amounts to is that the idea of a holographic universe is not dead, as current observations don’t rule it out, but it does stand on shaky ground compared with the standard model. However, as the study authors note, calculating the ripples in the early universe is not a simple task, and future mathematics may yet lead to a better fit to observations and point to us living in a holographic universe. The true nature of our universe is still up for grabs. According to New Scientist. Thank you for watching! Don't forget to like this video, and subscribe for the next video. #researchsciences #sciencesdiscovery #discoverspace #space #universe
Views: 71 21 News
Gravitational Wave Discovery! Evidence of Cosmic Inflation
 
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Baby photos of our universe show huge early growth spurt! Check out Audible: http://bit.ly/AudibleVe Regression to the Mean: http://bit.ly/1lgZQAQ Some clarifications: - The lengthening of wavelengths is not strictly due to stretching by the expanding universe but by the way the photons were emitted and absorbed in different frames of reference. - The effects of gravitational waves have been observed in the decaying orbital periods of some binary star systems, however detectors built to measure gravitational waves stretching and squeezing matter on Earth have not as yet detected them. - In the video I sometimes use the term Big Bang to refer to the beginning of time as we know it. The Big Bang actually refers to the whole process from the formation of our universe, through inflation, to the expanding mass of plasma in the early universe (not just the first instant). - Quantum gravity is by no means established by this observation but it is suggestive that General Relativity and Quantum Mechanics are working together here. Thank you to Professor Geraint Lewis and Henry Reich for comments on earlier drafts of this video (even if I haven't accepted all of your corrections).
Views: 739592 Veritasium
Cosmic Ripple Effect - The Radiant Soul - December 6, 2014
 
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http://judithkusel.wordpress.com http://cosmicgaia.com
Views: 1547 rainbowabundance
Big Break for COBE: the Cosmic Background Explorer
 
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When the Cosmic Background Explorer (COBE) probe imaged our first picture of the big bang, it was heralded as the most important discovery of the 20th century. It also proved many theorists wrong. John Mather, David Spergel, and Lawrence Krauss discuss the importance of COBE's discovery, and the importance of being wrong sometimes. Watch the Full Program Here: http://youtu.be/w1aAMy5anlM Original Program Date: May 31, 2012 The World Science Festival gathers great minds in science and the arts to produce live and digital content that allows a broad general audience to engage with scientific discoveries. Our mission is to cultivate a general public informed by science, inspired by its wonder, convinced of its value, and prepared to engage with its implications for the future. Subscribe to our YouTube Channel for all the latest from WSF. Visit our Website: http://www.worldsciencefestival.com/ Like us on Facebook: https://www.facebook.com/worldsciencefestival Follow us on twitter: https://twitter.com/WorldSciFest
Deflating the Theory of Cosmic Inflation | Space News
 
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The EU2017 Conference: Future Science -- Aug 17 - 20, Phoenix Rebroadcast—only $29: https://www.electricuniverse.live In the 20th century, the story of our Universe's origins was a shifting and incredibly strange tale. Around 1980, the physicist Alan Guth developed the idea of cosmic inflation or the notion that physical space experienced an exponential expansion immediately after the Big Bang. But in this series, we have reported on countless discoveries that in effect falsify the foundations of the Big Bang theory. Nevertheless, it remains the dominant view in 21st-century cosmology. In this episode, Thunderbolts Picture of the Day managing editor Steve Smith offers his analysis of the current state of Big Bang cosmology, and specifically the evidence for and against cosmic inflation. Previous Space News, More Big Problems for Big Bang: https://www.youtube.com/watch?v=xUC_a-IMmGs&t=7s If you see a CC with this video, it means that subtitles are available. To find out which ones, click on the Gear Icon in the lower right area of the video box and click on “subtitles” in the drop down box. Then click on the subtitle that you would like. Don’t miss the NEW Patreon rewards for 2017 at PATREON— “Changing the world through the understanding of the Electric Universe.” https://www.patreon.com/tboltsproject Subscribe to Thunderbolts Update newsletter: http://eepurl.com/ETy41 The Thunderbolts Project Home: http://www.thunderbolts.info Essential Guide to the Electric Universe: http://www.thunderbolts.info/wp/eg-contents/ Facebook: http://www.facebook.com/thunderboltsproject Twitter: @tboltsproject Electric Universe by Wal Thornhill: http://www.holoscience.com/wp/ Electric Universe T-shirts and Gifts: http://stickmanonstone.com/ The ideas expressed in videos presented on The Thunderbolts Project YouTube Channel do not necessarily express the views of T-Bolts Group Inc or The Thunderbolts Project(TM).
Views: 44154 ThunderboltsProject
What Is The Cosmic Microwave Background?
 
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In older literature, the cmb is also variously known as cosmic microwave background radiation (cmbr) or 'relic radiation' apr 3, 2013 tells us age and composition of universe raises new questions that must be answered. Cosmic microwave background wikipedia cosmic wikipedia en. Googleusercontent search. Ripples in the energy of. Created shortly after the universe came into oct 13, 2003 cosmic microwave background radiation, or cmb for short, is a faint glow of light that fills universe, falling on earth from every direction with nearly uniform intensity may 9, 2016 existence radiation was first predicted by ralph alpherin 1948 in connection his research big bang nucleosynthesis mission's main goal to study relic left over across whole sky at greater an all map background, as detected cobe. Cosmology origin, evolution, fate of material universe. Cosmic microwave background aps physics5 facts you probably don't know about the cosmic radiation sciencedaily. It has a thermal read and learn for free about the following article cosmic microwave background mar 12, 2014. Take the case of bell labs physicists in astronomy and cosmology, cosmic microwave background (cmb) is thermal radiation assumed to be left over from 'big bang' cosmology. Cosmic microwave background definition, electromagnetic radiation coming from every direction in the universe, considered remnant of big bang and 1964, two young radioastronomers, arno penzias robert wilson, accidentally discovered cmb using a well calibrated horn antenna. Wikipedia wiki cosmic_microwave_background url? Q webcache. That may sound like a long time watch videos from bbc programmes that are full of facts about cosmic microwave background radiation (cmb) and presented by easy to understand experts mar 17, 2017 in our universe's case, the best knowledge, that's leftover glow big bang sometimes most stunning scientific discoveries least expected, occur more serendipity than intent. Planck and the cosmic microwave background planck space esathe bbc universe radiation cmb where is background? Forbes. The cosmic microwave background (cmb) is electromagnetic radiation left over from an early stage of the universe in big bang cosmology. Cosmic microwave background wikipediacosmic big bang relic explained what is the cosmic radiation? Scientific wmap cmb test nasa. The temperature differences (indicated by colour) are about one part in ten the cosmic microwave background (or 'cmb' for short) is radiation from around 400,000 years after start of universe. The cosmic microwave background, or cmb, is radiation that fills the universe and can be detected in every direction. The cosmic microwave background (article) what is the radiation? Youtubethe radiation smoot groupcmb introduction wayne hu's tutorials. In older jun 19, 2013 and this is a picture of the fluctuations in cosmic microwave background, or temperature differences different regions sky cosmology, background radiation form electromagnetic discovered 196
Views: 7 S AnswerZ
Astronomers Discover Echoes from Expansion after Big Bang
 
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Astronomers announce discovery many consider the holy grail of their field: ripples in the fabric of space-time that are echoes of the massive expansion of the universe that took place just after the Big Bang. Full Story: Astronomers announced on Monday (March 17) that they had discovered what many consider the holy grail of their field: ripples in the fabric of space-time that are echoes of the massive expansion of the universe that took place just after the Big Bang. Predicted by Albert Einstein nearly a century ago, the discovery of gravitational waves would be the final piece in one of the greatest achievements of the human intellect: an understanding of how the universe began and evolved into the cornucopia of galaxies and stars, nebulae and vast stretches of nearly empty space that constitute the known universe. "Detecting this signal is one of the most important goals in cosmology today," John Kovac of the Harvard-Smithsonian Center for Astrophysics, who led the research, said in a statement. Gravitational waves are feeble, primordial undulations that propagate across the cosmos at the speed of light. Astronomers have sought them for decades because they are the missing evidence for two theories. One is Einstein's general theory of relativity, published in 1915, which launched the modern era of research into the origins and evolution of the cosmos. The general theory explains gravity as the deformation of space by massive bodies. Einstein posited that space is like a flimsy blanket, with embedded stars and planets causing it to curve rather than remain flat. Those curvatures of space are not stationary, Einstein said. Instead, the gravitational waves propagate like water in a lake or seismic waves in Earth's crust. The other theory that predicted gravitational waves is called cosmic inflation. Developed in the 1980s, it posited that in less time than the blink of an eye after the Big Bang, the infant cosmos expanded exponentially, inflating in size by 100 trillion trillion times. The Big Bang is the explosion of space-time that began the universe 13.8 billion years ago. In addition to making the cosmos remarkably uniform across vast expanses of space, inflation caused everything it touched to balloon exponentially. That included tiny fluctuations in gravity that, when inflated, became gravitational waves. Although the theory of cosmic inflation received a great deal of experimental support, the failure to find the gravitational waves it predicted caused many cosmologists to hold off their endorsement. The measurements announced by the astronomers on Monday are nearly twice as large as cosmologists predicted for gravitational waves, suggesting a great deal more could be learned about how inflation worked. The gravitational waves were detected by a radio telescope called BICEP2 (Background Imaging of Cosmic Extragalactic Polarization). The instrument, which scans the sky from the South Pole, examines what is called the cosmic microwave background, the extremely weak radiation that pervades the universe. Its discovery in 1964 by astronomers at Bell Labs in New Jersey was hailed as the best evidence to date that the universe began in an immensely hot explosion. The microwave background radiation, which has been bathing the universe since 380,000 years after the Big Bang, is a mere 3 degrees above absolute zero, having cooled to near non-existence from the immeasurably hot plasma that was the universe in the first fractions of a second of its existence. The background radiation is not precisely uniform. Like light, the relic radiation is polarized as the result of interacting with electrons and atoms in space. For more news and videos visit ☛ http://ntd.tv Follow us on Twitter ☛ http://twitter.com/NTDTelevision Add us on Facebook ☛ http://on.fb.me/s5KV2C
Views: 1420 NTDTV
Inflation Theory Part 1 - Eternal Inflation: What Caused The Big Bang
 
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Inflation is one of the most famous, well-accepted, and relatively new cosmological theories, and it’s part of the many cosmological theories. While the big bang theory successfully explains the majority of universe’s history, it doesn’t explain what caused the bang in the first place, and that’s what the theory of inflation is trying to explain. Inflation explains the origins of the large-scale structure of the universe. It was first proposed by Alen Guth, the father of inflationary cosmology, and later developed further by others like Andrei Linde, the originator of the chaotic inflation model, Paul Steinhardt, who first proposed the eternal version of inflation, and Alexander Vilenkin, who later developed a theory of inflation both eternal to the past and future. So many inflationary theories have been developed during the last couple decades. The most successful ones are Chaotic Inflation and New Inflation. Both models have eternal nature. In such models of inflation, once inflation starts, it never stops. The result of an eternal inflation is a gigantic multiverse, containing infinite number of bubble or pocket universes. Inflation has been invented to address so many problems of the very early universe, like the absence of magnetic monopoles, flatness problem, horizon problem, and anisotropy of the cosmic microwave background radiation. These are big and serious cosmological questions that inflation handles very well, and we’ll go over them in this episode. === Sources: (Alan H. Guth) Eternal inflation and its implications https://arxiv.org/abs/hep-th/0702178 (Alexander Vilenkin) The Principle of Mediocrity https://arxiv.org/abs/1108.4990 (Alan H. Guth) Quantum Fluctuations in Cosmology and How They Lead to a Multiverse https://arxiv.org/abs/1312.7340 (Inflationary spacetimes are not past-complete) Arvind Borde, Alan H. Guth, Alexander Vilenkin https://arxiv.org/abs/gr-qc/0110012 (Alexander Vilenkin) Eternal inflation and chaotic terminology https://arxiv.org/abs/gr-qc/0409055 (Jaume Garriga, Alexander Vilenkin) Many worlds in one https://arxiv.org/pdf/gr-qc/0102010.pdf (Alexander Vilenkin) The Principle of Mediocrity https://arxiv.org/abs/1108.4990 (Tanmay Vachaspati and Mark Trodden) Causality and Cosmic Inflation https://arxiv.org/abs/gr-qc/9811037 (Andrei Linde) A brief history of the multiverse https://arxiv.org/abs/1512.01203 The Hidden Reality: Parallel Universes and the Deep Laws of the Cosmos by Brian Greene https://www.amazon.com/Hidden-Reality-Parallel-Universes-Cosmos/dp/0307278123 Embellishments on the Big Bang http://www.astronomynotes.com/cosmolgy/s12.htm (Max Tegmark) Parallel Universes https://arxiv.org/pdf/astro-ph/0302131.pdf (Andrei Linde) Inflation, Quantum Cosmology and the Anthropic Principle https://arxiv.org/abs/hep-th/0211048 === Musics: Chris Zabriskie - Cylinder Seven http://freemusicarchive.org/music/Chris_Zabriskie/2014010103336111/Chris_Zabriskie_-_Cylinders_-_07_-_Cylinder_Seven Chris Zabriskie - Wonder Circle http://freemusicarchive.org/music/Chris_Zabriskie/Divider/04_-_Wonder_Cycle Chris Zabriskie - Oxygen Garden http://freemusicarchive.org/music/Chris_Zabriskie/Divider/05_-_Oxygen_Garden Chris Zabriskie - There Are Many Different Kinds of Love http://freemusicarchive.org/music/Chris_Zabriskie/Vendaface/03_-_There_Are_Many_Different_Kinds_of_Love Chris Zabriskie - We Were Never Meant to Live Here http://freemusicarchive.org/music/Chris_Zabriskie/Music_from_Neptune_Flux/ChrisZabriskie-MusicfromNeptuneFlux-10 Chris Zabriskie - Another Version of You http://freemusicarchive.org/music/Chris_Zabriskie/Thoughtless/Chris_Zabriskie_-_Thoughtless_-_02_-_Another_Version_of_You
Views: 2610 Disculogic
Alan Guth Module 6: Quantum Fluctuations
 
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Module 6: Alan Guth -- Quantum Fluctuations Take the full class here: http://www.worldscienceu.com/courses/master_class/master-class-alan-guth Subscribe to our YouTube Channel for all the latest from World Science U. Like us on Facebook: https://www.facebook.com/worldscienceu Follow us on Twitter: https://twitter.com/worldscienceu MODULE 6: Quantum Fluctuations Summary It turns out that the early universe was not exactly uniform. - Had it been completely uniform, it would have stayed that way forever, and all matter would have been a bland, homogeneous "soup." - Instead, there were small variations in mass density. This led to the clumping or "clustering" of matter. - Bits of matter began to attract each other, forming bigger bits, which in turn could pull in even more matter with their gravitational forces. - Slowly, structure started to appear in the universe. We see this today in the form of galaxies and the clustering of galaxies. This led cosmologists to wonder where these variations in mass density originated from. - The inflationary picture explains this using the idea of quantum fluctuations. - This means that energy conservation can appear to be violated—but only for very small instances of time. - Quantum fluctuations appear as temporary changes in the amount of energy at a specific point. - The mass density of the early universe fluctuated on the quantum scale, having a recurring effect that produced all the clumping of matter we see today. Inflation predicts these quantum fluctuations extremely accurately. - These ripples can be analyzed like any other wave, with inflation making generic predictions for their spectrum. - We can calculate how the intensity of the ripples varies with their wavelength. - The fluctuations we measure in the cosmic background radiation agree very well with those predicted by inflation.
Views: 1692 World Science U
Gravitational Waves: A New Era of Astronomy Begins
 
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On September 14th, 2015, a ripple in the fabric of space, created by the violent collision of two distant black holes over a billion years ago, washed across the Earth. As it did, two laser-based detectors, 50 years in the making – one in Louisiana and the other in Washington State – momentarily twitched, confirming a century-old prediction by Albert Einstein and marking the opening of a new era in astronomy. Join some of the very scientists responsible for this most anticipated discovery of our age and see how gravitational waves will be used to explore the universe like never before. This program will feature exclusive footage from director Les Guthman’s upcoming documentary chronicling the drama of the gravitational waves discovery. Subscribe to our YouTube Channel for all the latest from WSF. Visit our Website: http://www.worldsciencefestival.com/ Like us on Facebook: https://www.facebook.com/worldscience... Follow us on twitter: https://twitter.com/WorldSciFest Original Program Date: June 4, 2016 MODERATOR: Brian Greene PARTICIPANTS: Barry Barish, Nergis Mavalvala, Frans Pretorius, David Shoemaker, Rai Weiss Brian Greene's Introduction - 00:15 Einsteins prediction of bending light - 5:58 Participant Introductions - 9:55 Chapter one: The Discovery - 11:37 The rumors of a gravitational wave - 14:40 How LIGO almost missed the gravitational wave - 19:16 BICEP2 and getting it right - 22:34 Could we have recreated this experiment without a gravitational wave? - 27:09 Chapter two: The Numerical Relativity - 29:30 So you detect a gravitational wave, what does that mean? - 31:58 Black holes vs Neutron stars - 48:12 Chapter three: Detection - 54:31 How LIGO Laboratory works - 1:04:06 How do you shield the laser from the other waves in the world? - 1:09:00 The move from LIGO to Advanced LIGO 1:12:24 Giving credit to Barry Barish - 1:20:04 Chapter four: The Future of LIGO 1:24:40 eLISA and a space interferometer - 1:27:40 Mathematically solving the future of colliding black holes 1:32:00
Views: 1900813 World Science Festival
Gravitational Waves | John Mather | TEDxHerndon
 
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Dr. John Mather discusses Gravitational Waves and the future of astrophysics. Dr. Mather is the recipient of numerous awards, including the Nobel Prize in Physics (2006) with George Smoot, for the COBE work, and the NASA Distinguished Service Medal (2007). He is a member of many professional societies including the National Academy of Sciences and the American Academy of Arts and Sciences. Dr. John C. Mather is a Senior Astrophysicist and is the Senior Project Scientist for the James Webb Space Telescope at NASA’s Goddard Space Flight Center in Greenbelt, MD. His research centers on infrared astronomy and cosmology. As an NRC postdoctoral fellow at NASA’s Goddard Institute for Space Studies (New York City), he led the proposal efforts for the Cosmic Background Explorer (74-76), and came to GSFC to be the Study Scientist (76-88), Project Scientist (88-98), and the Principal Investigator for the Far IR Absolute Spectrophotometer (FIRAS) on COBE. With the COBE team, he showed that the cosmic microwave background radiation has a blackbody spectrum within 50 parts per million, confirming the expanding universe model (aka the Big Bang Theory) to extraordinary accuracy, and initiating the study of cosmology as a precision science. This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at http://ted.com/tedx
Views: 19120 TEDx Talks
Gravitational wave - Video Learning - WizScience.com
 
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In physics, "gravitational waves" are ripples in the curvature of spacetime which propagate as waves, travelling outward from the source. Predicted in 1916 by Albert Einstein to exist on the basis of his theory of general relativity, gravitational waves theoretically transport energy as "gravitational radiation". Sources of detectable gravitational waves could possibly include binary star systems composed of white dwarfs, neutron stars, or black holes. The existence of gravitational waves is a possible consequence of the Lorentz invariance of general relativity since it brings the concept of a limiting speed of propagation of the physical interactions with it. Gravitational waves cannot exist in the Newtonian theory of gravitation, in which physical interactions propagate at infinite speed. Although gravitational radiation has not been "directly" detected, there is "indirect" evidence for its existence. For example, the 1993 Nobel Prize in Physics was awarded for measurements of the Hulse–Taylor binary system which suggest that gravitational waves are more than mathematical anomalies. Various gravitational wave detectors exist and on 17 March 2014, astronomers at the Harvard–Smithsonian Center for Astrophysics claimed that they had detected and produced "the first direct image of gravitational waves across the primordial sky" within the cosmic microwave background, providing strong evidence for inflation and the Big Bang. Peer review will be needed before there can be any scientific consensus about these new findings. On 19 June 2014, lowered confidence in confirming the cosmic inflation findings was reported; on 19 September 2014, a further reduction in confidence was reported and, on 30 January 2015, even less confidence yet was reported. Wiz Science™ is "the" learning channel for children and all ages. SUBSCRIBE TODAY Disclaimer: This video is for your information only. The author or publisher does not guarantee the accuracy of the content presented in this video. USE AT YOUR OWN RISK. Background Music: "The Place Inside" by Silent Partner (royalty-free) from YouTube Audio Library. This video uses material/images from https://en.wikipedia.org/wiki/Gravitational+wave, which is released under Creative Commons Attribution-Share-Alike License 3.0 http://creativecommons.org/licenses/by-sa/3.0/ . This video is licensed under Creative Commons Attribution-Share-Alike License 3.0 http://creativecommons.org/licenses/by-sa/3.0/ . To reuse/adapt the content in your own work, you must comply with the license terms.
Views: 13 Wiz Science™
Does God Exist? | The Truth Seeker Project | Episode #2
 
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Is there evidence for God's existence? Can it be proven scientifically? In today's episode of The Truth Seeker Project we take a look at the evidence for God's existence. REMEMBER: A Truth Seeker will search through the evidence themselves. I can only share so much. Be sure to study the subject for yourself. Original video of Frank Turek from Crossexamined.org | https://youtu.be/XjHhtWL_3Og One Reality Films "Deception In The Church" Watch here: https://youtu.be/g1LsiG3mG2k "Homophobia" Watch here: https://youtu.be/dvmGFS7pOU0 "Final Judgment" Watch here: https://youtu.be/YqI4XivbG9o "Sin Kills" Watch here: https://youtu.be/j2Au5YtU2oQ The Second Law of Thermodynamics -The Second Law of Thermodynamics states that the universe is running out of usable energy. -Sometimes called the Law of Entropy, the Second Law of Thermodynamics also states that the universe is moving toward disorder rather than order - that nature tends to bring things to disorder. -Without a beginning, by now the universe would be in complete disarray with no usable energy remaining. The Expanding Universe -In 1929, astronomer Edwin Hubble observed that the other galaxies in the universe are moving away from our galaxy. -If the galaxies are currently moving apart, then previously they must have been closer together. The ultimate extrapolation of this idea is that all of the matter in the universe originated from a single point. -It is important to understand that this beginning point was not a dense point of matter, like some kind of extremely compacted pellet, but was literally nothing – there was no space, no time, no matter. The Expanding Universe -Aristotle defined nothing as what rocks dream about. Nothing is literally no thing. -“According to the Big Bang Theory, the whole matter of the universe began to exist at a particular time in the remote past. A proponent of such a theory, at least if he is an atheist, must believe that the matter of the universe came from nothing by nothing.” Anthony Kenny -The universe is not expanding into empty space, but space itself is expanding – there was no space before the Big Bang. -It’s also important to understand that the universe did not emerge from existing material but from nothing – there was no matter before the Big Bang. -In fact, chronologically, there was no “before” the Big Bang because there are no “befores” without time, and there was no time until the Big Bang. -Time, space, and matter came into existence at the Big Bang. The Expanding Universe Cosmic Background Radiation -Good scientific theories often predict future discoveries. -Scientists predicted as early as 1948 that the universe began in a great explosion, called “The Big Bang” and that there would be remnant heat from that explosion still out there. -The remnant heat is actually cosmic background radiation and was discovered in 1965. -Quite literally the “smoking gun” of the Big Bang, this cosmic background radiation put to rest any lingering thought that the universe was eternal. Great Galaxy Seeds -In 1992 the theory that there should be slight variations in the temperature of the cosmic background radiation from the Big Bang was confirmed by data gather by the NASA satellite COBE. -It showed precise temperature variations in radiation, allowing just enough matter to congregate to form galaxies, but not so much as to cause the universe to collapse back in on itself. -The ripples in radiation show that the beginning of the universe was extremely precise—accurate to one part in 100,000. -Had it been even slightly different, galaxies would not have formed, leaving no place for life to have begun. -Therefore, the Big Bang was not a chaotic, random explosion but seems to have been a purposeful, controlled event. Einstein’s Theory of General Relativity -In 1916, Albert Einstein developed the theory of General Relativity. The theory of General Relativity demands an absolute beginning for time, space, and matter and proves that all three are interdependent— you can’t have one without the others. -The SURGE evidence shows that space, time and matter came into existence together. In other words, the universe exploded into being out of nothing. -Scientists call this the Big Bang, and theologians call creation out of nothing ex nihilo.
Views: 928 One Reality
Ed Copeland: The state of the Universe
 
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Public Lecture at the 100 Years of General Relativity talks series, Dec 3, 2015
Views: 7306 digt-group
How to find black holes with lasers: Dr Andreas Freise
 
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In 1916, Einstein -- as a consequence of his new theory of gravity -- predicted the existence of gravitational radiation (ripples in the fabric of space--time that propagate at the speed of light). Today, the hunt for such gravitational waves has sparked a new field of fundamental and instrumental science, using kilometre-sized telescopes that exploit laser technology. These new instruments are now in operation and close to observing Einstein's prediction for the very first time. The observation of gravitational waves has the potential to change dramatically our understanding of the universe; we will be able to "hear" some of the most violent events in cosmic history, including black holes colliding in the centre of galaxies and the first fraction of a second after the Big Bang. Watch other Physics in Perspective speakers at: http://www.iop.org/resources/videos/education/pip/index.html
Views: 3166 Institute of Physics
How are Galaxies Made? - Professor Joseph Silk
 
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How does the universe create galaxies and how can a structure of that size possibly exist?: http://www.gresham.ac.uk/professors-and-speakers/professor-joseph-silk By examining the “ripples” that have been seen in the Cosmic Microwave Background, astronomers are beginning to unpick the origins of enormous stellar structures like galaxies. The mysteries of why they form and where are slowly being unravelled Joseph Silk is a renowned cosmologist who currently holds posts at three of the world’s top Universities: John Hopkins University, Le Sorbonne and the University of Oxford. Professor Silk is one of the world’s leading experts in theoretical cosmology, dark matter, galaxy formation and cosmic microwave background. Professor Silk’s studies of galaxy formation and his work on the dynamics of mass loss and the feedback mechanisms from star formation and evolution formed a highly significant basis for subsequent work in this important field. In 2011 he won the Balzan Prize for this pioneering work on the infant universe. You can find out more about Professor Silk by visiting his Professor page: http://www.gresham.ac.uk/professors-and-speakers/professor-joseph-silk Professor Silk's inaugural series for Gresham College is titled 'The Biggest Questions in the Universe'. In six lectures, Professor Silk will examine the earliest moments of the Universe; discuss the first stars and the future of the field as 'galactic archaeology' expands our understanding of the Universe. You can see all of the lectures on the website: http://www.gresham.ac.uk/the-biggest-questions-in-the-universe Gresham College has been giving free public lectures since 1597. This tradition continues today with all of our five or so public lectures a week being made available for free download from our website. There are currently over 1,800 lectures free to access or download from the website. Website: http://www.gresham.ac.uk Twitter: http://twitter.com/GreshamCollege Facebook: https://www.facebook.com/greshamcollege
Views: 1751 Gresham College
ANATOMY OF THE UNIVERSE
 
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The Universe contains everything that exists, from the tiniest subatomic particles to galactic superclusters (the largest structures known). Nobody knows how big the Universe is, but astronomers estimate that it contains about 100 billion galaxies, each comprising an average of 100 billion stars. The most widely accepted theory about the origin of the Universe is the Big Bang theory, which states that the Universe came into being in a huge explosion – the Big Bang – that took place between 10 and 20 billion years ago. The Universe initially consisted of a very hot, dense fireball of expanding, cooling gas. After about one million years, the gas probably began to condense into localized clumps called protogalaxies. During the next five billion years, the protogalaxies continued condensing, forming galaxies in which stars were being born. Today, billions of years later, the Universe as a whole is still expanding, although there are localized areas in which objects are held together by gravity; for example, many galaxies are found in clusters. The Big Bang theory is supported by the discovery of faint, cool background radiation coming evenly from all directions. This radiation is believed to be the remnant of the radiation produced by the Big Bang. Small “ripples” in the temperature of the cosmic background radiation are thought to be evidence of slight fluctuations in the density of the early Universe, which resulted in the formation of galaxies. Astronomers do not yet know if the Universe is “closed”, which means it will eventually stop expanding and begin to contract, or if it is “open”, which means it will continue expanding forever. Galaxies A galaxy is a huge mass of stars, nebulae, and interstellar material. The smallest galaxies contain about 100,000 stars, while the largest contain up to 3,000 billion stars. There are three main types of galaxy, classified according to their shape: elliptical, which are oval shaped; spiral, which have arms spiraling outwards from a central bulge; and irregular, which have no obvious shape. Sometimes, the shape of a galaxy is distorted by a collision with another galax
Views: 69 Terra Byte
astronomy2GCSE Topic 4.3 Cosmology
 
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This is the fifteenth of 15 videos that will cover much of the astronomy GCSE course. This video covers Topic 4.3 Cosmology. This topic covers: Doppler principle, redshift and blueshift, the discovery of Quasars, Hubbles Law and the Hubble constant, The age of the universe, Cosmic Microwave Background Radiation, past evolution of the universe, different evolutionary models of the universe, dark matter and energy. I am currently an A-Level student, particularly interested in physics, maths, chemistry and astronomy, who studied GCSE astronomy from 2013 to 2015. I have made this revision and learning resource for anyone interested in astronomy and any GCSE astronomy students. Links: https://www.youtube.com/watch?v=h4OnBYrbCjY http://map.gsfc.nasa.gov/media/121238/index.html
Views: 1786 astronomy2GCSE
Gravitational Astronomy? How Detecting Gravitational Waves Changes Everything
 
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We’ve now had multiple detections of gravitational waves, opening up a whole new field: gravitational astronomy. We talk about the detections made so far, and how we can see the Universe in a whole new way. Support us at: http://www.patreon.com/universetoday More stories at: http://www.universetoday.com/ Follow us on Twitter: @universetoday Like us on Facebook: https://www.facebook.com/universetoday Google+ - https://plus.google.com/+universetoday/ Instagram - http://instagram.com/universetoday Team: Fraser Cain - @fcain / [email protected] Karla Thompson - @karlaii Chad Weber - [email protected] Just a couple of weeks ago, astronomers from Caltech announced their third detection of gravitational waves from the Laser Interferometer Gravitational-Wave Observatory or LIGO. As with the previous two detections, astronomers have determined that the waves were generated when two intermediate-mass black holes slammed into each other, sending out ripples of distorted spacetime. One black hole had 31.2 times the mass of the Sun, while the other had 19.4 solar masses. The two spiraled inward towards each other, until they merged into a single black hole with 48.7 solar masses. And if you do the math, twice the mass of the Sun was converted into gravitational waves as the black holes merged. These gravitational waves traveled outward from the colossal collision at the speed of light, stretching and compressing spacetime like a tsunami wave crossing the ocean until they reached Earth, located about 2.9 billion light-years away. The waves swept past each of the two LIGO facilities, located in different parts of the United States, stretching the length of carefully calibrated laser measurements. And from this, researchers were able to detect the direction, distance and strength of the original merger. Seriously, if this isn’t one of the coolest things you’ve ever heard, I’m clearly easily impressed. Now that the third detection has been made, I think it’s safe to say we’re entering a brand new field of gravitational astronomy. In the coming decades, astronomers will use gravitational waves to peer into regions they could never see before. Being able to perceive gravitational waves is like getting a whole new sense. It’s like having eyes and then suddenly getting the ability to perceive sound. This whole new science will take decades to unlock, and we’re just getting started. As Einstein predicted, any mass moving through space generates ripples in spacetime. When you’re just walking along, you’re actually generating tiny ripples. If you can detect these ripples, you can work backwards to figure out what size of mass made the ripples, what direction it was moving, etc. Even in places that you couldn’t see in any other way. Let me give you a couple of examples. Black holes, obviously, are the low hanging fruit. When they’re not actively feeding, they’re completely invisible, only detectable by how they gravitational attract objects or bend light from objects passing behind them. But seen in gravitational waves, they’re like ships moving across the ocean, leaving ripples of distorted spacetime behind them. With our current capabilities through LIGO, astronomers can only detect the most massive objects moving at a significant portion of the speed of light. A regular black hole merger doesn’t do the trick - there’s not enough mass. Even a supermassive black hole merger isn’t detectable yet because these mergers seem to happen too slowly. This is why all the detections so far have been intermediate-mass black holes with dozens of times the mass of our Sun. And we can only detect them at the moment that they’re merging together, when they’re generating the most intense gravitational waves. If we can boost the sensitivity of our gravitational wave detectors, we should be able to spot mergers of less and more massive black holes. But merging isn’t the only thing they do. Black holes are born when stars with many more times the mass of our Sun collapse in on themselves and explode as supernovae. Some stars, we’ve now learned just implode as black holes, never generating the supernovae, so this process happens entirely hidden from us. Is there a singularity at the center of a black hole event horizon, or is there something there, some kind of object smaller than a neutron star, but bigger than an infinitely small point? As black holes merge together, we could see beyond the event horizon with gravitational waves, mapping out the invisible region within to get a sense of what’s going on down there. We want to know about even less massive objects like neutron stars, which can also form from a supernova explosion. These neutron stars can orbit one another and merge generating some of the most powerful explosions in the Universe: gamma ray bursts. But do neutron stars have surface features? Different densities? Could we detect a wobble in the gravitational waves in the last moments before a merger?
Views: 31174 Fraser Cain
The Spacetime Symphony of Gravitational Waves | Kelly Holley-Bockelmann | TEDxNashville
 
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Science is on the verge of observing the ripples in spacetime caused by moving black holes; these gravitational waves will open a new window to the universe of things we can't see with light - things that could unlock some of the deepest mysteries about the universe. Kelly Holley‐Bockelmann is an Associate Professor of Astronomy at Vanderbilt University, where she joined the faculty in 2007. She received her B.S. in Physics at Montana State University and her PhD in Astronomy in 1999 at the University of Michigan. After her PhD, she did postdoctoral work at Case Western Reserve University and the University of Massachusetts. In 2004, she joined the Center for Gravitational Wave Physics at The Pennsylvania State University. She is a recipient of a Faculty Early Career Development (CAREER) award from the National Science Foundation , is a Vanderbilt Chancellor Faculty Fellow, and her work has also been supported by NASA. Dr. Holley ­Bockelmann’s research on growing supermassive black holes and rogue black holes have been featured in many online and print media outlets, though she still gets a bit nervous talking to the press. This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at http://ted.com/tedx
Views: 39247 TEDx Talks
Gravitational Waves Discovery - Sixty Symbols
 
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Discussed by Ed Copeland and Mike Merrifield. Extra footage from these interviews: https://youtu.be/2uYEayOBj1k More on Black Holes from Sixty Symbols: http://bit.ly/Black_Hole_Videos LIGO: https://www.ligo.caltech.edu Cool Black Hole simulations and info: http://www.black-holes.org LHC visit: http://bit.ly/LHCvideos Visit our website at http://www.sixtysymbols.com/ We're on Facebook at http://www.facebook.com/sixtysymbols And Twitter at http://twitter.com/sixtysymbols This project features scientists from The University of Nottingham http://bit.ly/NottsPhysics Sixty Symbols videos by Brady Haran http://www.bradyharanblog.com Email list: http://eepurl.com/YdjL9
Views: 225803 Sixty Symbols
Americans John C. Mather and George F. Smoot win Nobel Prize in Physics
 
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SHOTLIST 1. Various of Stockholm skyline 2. Tilt up of exterior of Royal Swedish Academy of Sciences 3. Close up of sign reading "Royal Swedish Academy of Sciences" 4. Mid shot of Nobel committee 5. Audience listening 6. SOUNDBITE (English) Gunnar Oquist, Permanent Secretary of the Royal Swedish Academy of Sciences: "The Royal Swedish Academy of Sciences has decided to award the Nobel Prize in Physics for the year 2006 jointly to John Mather and George Smoot, they get the prize for their discovery of the blackbody form and anisotropy of the cosmic microwave background radiation. Both of the laureates are from the US." 7. Photographs of the winners being shown on the screen 8. Various names of winners on a written press release 9. Wide of audience 10. Various of screen shots showing presentation of winners study on the universe 11. SOUNDBITE (English) Gunnar Oquist, Permanent Secretary of the Royal Swedish Academy of Sciences: (speaking on phone with winner John C Mather) "I think everybody in the room would like to join me in congratulating you on your achievement and congratulating you and Doctor Smoot." 12. Photograph of John C Mather, AUDIO (English) John C Mather, winner of the Nobel Prize for Physics 2006: "When I heard about the prize I was certainly thrilled and amazed, I can't say I was completely surprised because people have been telling us that we should be recognised but this is such a special and rare honour for people that I am still amazed." 13. Wide of journalists 14. SOUNDBITE (English) Lars Bergstrom, Secretary of the Nobel Committee for Physics: "And of course this has completely changed cosmology. All these things that we speak about now like dark matter, dark energy, various parameters, limits on neutrino masses from cosmology all of these measurements were a starting point for all of this, it has opened the door to a while new field of cosmology." 15. Pan right of hall Lawrence Berkeley Laboratory 16. Two stills of George F Smoot NASA 17. Still of John C Mather NASA FILE, April 1992 18. Various of ripples at the edge of the cosmos detected by NASA's Cosmic Background Explorer (COBE) that are the fossilised imprints of the birth of the stars and galaxies STORYLINE: Americans John C Mather and George F Smoot won the 2006 Nobel Prize in physics on Tuesday for work that helped shed more light on the beginning of the universe and the origin of galaxies and stars. The scientists were awarded the prize for discovering the nature of "blackbody radiation," cosmic background radiation believed to stem from the so-called Big Bang when the universe was created, the Royal Swedish Academy of Sciences in Stockholm said. Their work was based on measurements done with the help of the NASA-launched Cosmic Background Explorer satellite in 1989. They were able to observe the universe in its early stages about 380,000 years after it was born. Ripples in the light they detected also helped demonstrate how galaxies came together over time. By confirming the predictions of the Big-Bang theory, which states that the universe was borne of a dense and incredibly hot state billions of years ago, with direct quantitative evidence, the scientists transformed the study of the early universe from a largely theoretical pursuit into a new era of direct observation and measurement. "The very detailed observations that the laureates have carried out from the COBE satellite have played a major role in the development of modern cosmology into a precise science," the academy said in its citation. Mather, 60, works at the NASA Goddard Space Flight Center in Greenbelt, Maryland, and Smoot, 61, works at the Lawrence Berkeley National Laboratory in Berkeley, California. You can license this story through AP Archive: http://www.aparchive.com/metadata/youtube/52b31b717308ac6450158e8ba7cf3258 Find out more about AP Archive: http://www.aparchive.com/HowWeWork
Views: 175 AP Archive
Using Stars to See Gravitational Waves | Space Time
 
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Thank you to Brilliant for sponsoring this episode! To find out more, visit: https://brilliant.org/SpaceTime Now that gravitational waves are definitely a thing, it’s time to think about some of the crazy things we can figure out with them. In some cases we’re going to need a gravitational wave observatory - in fact, we've already built one. You can further support us on Patreon at https://www.patreon.com/pbsspacetime Get your own Space Time t­-shirt at http://bit.ly/1QlzoBi Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: http://www.reddit.com/r/pbsspacetime Help translate our videos! https://www.youtube.com/timedtext_cs_panel?tab=2&c=UC7_gcs09iThXybpVgjHZ_7g Previous Episode: The Physics of Life (ft. It's Okay to be Smart & PBS Eons!) https://www.youtube.com/watch?v=GcfLZSL7YGw&t=25s We are at the cusp of a golden age of gravitational wave astronomy. We’ve already talked about the Laser Interferometer Gravitational Wave Observatory–LIGO, and the first discovery of gravitational waves here. Those videos came out almost two years ago. A lot has happened since then. First, an update on LIGO. In its two and a half years of operation, LIGO has observed five certain black hole–black hole mergers. These events have been consistently surprising. Reinterpreting Low Frequency LIGO/Virgo Events as Magnified Stellar-Mass Black Holes at Cosmological Distances Broadhurst, Diego & Smoot (2018) https://arxiv.org/abs/1802.05273 On Stellar-Mass Black Hole Mergers in AGN Disks Detectable with LIGO McKernan et al. 2018 https://arxiv.org/abs/1702.07818 Stars as Resonant Absorbers of Gravitational Waves McKernan, Ford, Kocsis & Haiman https://arxiv.org/abs/1405.1414 Hosted by Matt O'Dowd Written by Drew Rosen and Matt O'Dowd Produced by Rusty Ward Graphics by Grayson Blackmon Assistant Editing and Sound Design by Mike Petrow and Linda Huang Made by Kornhaber Brown (www.kornhaberbrown.com) Special thanks to our Patreon Big Bang, Quasar and Hypernova Supporters: Big Bang CoolAsCats David Nicklas Faisal Saud Anton Lifshits Joey Redner Fabrice Eap Quasar Tambe Barsbay Mayank M. Mehrota Mars Yentur Mark Rosenthal Dean Fuqua Roman Pinchuk ColeslawPurdie Hypernova Edmund Fokschaner Matthew O’Connor Eugene Lawson Barry Hatfield Martha Hunt Joseph Salomone Chuck Zegar Jordan Young Ratfeast John Hofmann Craig Peterson Thanks to our Patreon Gamma Ray Burst Supporters: James Hughes Fabian Olesen Kris Fernet Jane Meyers James Flowers Greg Allen TJMadison Denys Ivanov Nick Virtue Alexey Eromenko Nicholas Rose Scott Gossett Mark Vasile Patrick Murray Sultan Alkhulaifi Alex Seto Michal-Peanut Karmi Erik Stein Kevin Warne JJ Bagnell J Rejc Avi Goldfinger John Pettit Florian Stinglmayr Benoit Pagé-Guitard Nathan Leniz Brandon Labonte David Crane Greg Weiss Brandon Cook Daniel Lyons
Views: 188268 PBS Space Time
Top 10 Reasons the Universe is Electric #5: Pulsars | Space News
 
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EU2017: Future Science -- Rebroadcast—only $29: https://www.electricuniverse.live One of the strangest hypothetical astrophysical objects is called a neutron star. Scientists tell us that the material leftover from a supernova explosion of a massive star collapses gravitationally, forming an incredibly small yet massively dense star mostly composed of tightly packed neutrons. A rotating neutron star is said to emit narrow beams of radiation, called pulsars. But the theoretical and evidential objections to this hypothesis are numerous. In this episode we explore the promising theoretical alternatives in the disciplines of plasma physics and electrical engineering. Perratt and Healy paper cited in this video: http://adsabs.harvard.edu/full/1995Ap%26SS.227..229H If you see a CC with this video, it means that subtitles are available. To find out which ones, click on the Gear Icon in the lower right area of the video box and click on “subtitles” in the drop down box. Then click on the subtitle that you would like. Don’t miss the NEW Patreon rewards for 2017 at PATREON— “Changing the world through the understanding of the Electric Universe.” https://www.patreon.com/tboltsproject Subscribe to Thunderbolts Update newsletter: http://eepurl.com/ETy41 The Thunderbolts Project Home: http://www.thunderbolts.info Essential Guide to the Electric Universe: http://www.thunderbolts.info/wp/eg-contents/ Facebook: http://www.facebook.com/thunderboltsproject Twitter: @tboltsproject Electric Universe by Wal Thornhill: http://www.holoscience.com/wp/ Electric Universe T-shirts and Gifts: http://stickmanonstone.com/ The ideas expressed in videos presented on The Thunderbolts Project YouTube Channel do not necessarily express the views of T-Bolts Group Inc or The Thunderbolts Project(TM).
Views: 22480 ThunderboltsProject
Gravitational waves used to measure age of universe
 
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Gravitational waves used to measure age of universe. Astronomers have used gravitational waves – ripples in the fabric of space and time caused by a violent cosmic event – to measure the age of the universe. The direct detection of gravitational waves from at least five sources during the past two years offers spectacular confirmation of Einstein’s model of gravity and space-time, researchers said. Now, astronomers at Harvard-Smithsonian Center for Astrophysics (CfA) in the US have used a single gravitational wave event (GW170817) to measure the age of the universe. A team of 1,314 scientists from around the world contributed to the detection of gravitational waves from a merging pair of binary neutron stars, followed by the detection of gamma-rays. They then identified the origin of the cataclysm in a source in the galaxy NGC4993 spotted in images taken with various time delays at wavelengths from the X-ray to the radio. An analysis of the gravitational waves from this event infers their intrinsic strength. The observed strength is less, implying that the source is about 140 million light-years away. NGC4993, its host galaxy, has an outward velocity due to the expansion of the universe that can be measured from its spectral lines. Knowing how far away it is and how fast the galaxy is moving from us allows scientists to calculate the time since the expansion began – the age of the universe: between about 11.9 and 15.7 billion years given the experimental uncertainties. The age derived from this single event is consistent with estimates from decades of observations relying on statistical methods using two other sources: the cosmic microwave background radiation (CMBR) and the motions of galaxies, researchers said. The former relies on mapping the very faint distribution of light dating from a time about four hundred thousand years after the big bang. The latter involves a statistical analysis of the distances and motions of tens of thousands of galaxies in relatively recent times.
Views: 5 Tech House
York Films - Nobel's Greatest Hits - 3 Cracking the Cosmo
 
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We consist of matter - the 92 elements that pervade the cosmos. But where did matter originate and how were those elements conceived? From the Big Bang to cosmic background radiation, Nobel laureates get at the facts - how matter forms in a particle soup when the Universe is less than one second old, how stars produce energy, how heavy elements like iron are born in super-massive stars.
Views: 215 YorkFilms
Cosmic Journeys - Hubble: Universe in Motion
 
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Since its launch 25 Years ago, the Hubble Telescope has returned images of unprecedented beauty of a dynamic and changing universe. In this episode of COSMIC JOURNEYS, Hubble’s most iconic images are bought to life to answer some of the most important questions facing astronomers today. Colliding galaxies, the birth and death of stars, jets of gas thrown out by material crashing into distant suns: these incredible images tech us valuable lessons about how galaxies are formed, what dark matter is and even the fate of the earth itself. Music by Epidemic Sound (http://www.epidemicsound.com)
Views: 1190051 SpaceRip