The Amazing World Of Gravity (Full Physics Documentary) | Spark
From the award-winning team that brought you The Secret Life of Chaos comes a unique television event on the physics of gravity, featuring unexpected historical insights, cutting-edge science and exciting new experiments.
With the brilliant Professor Jim Al-Khalili as our host, we visit the LIGO lab in the USA where gravity waves were discovered and uncover the latest theories about our cosmos that have come from studying the most intense sources of gravity imaginable – black holes.
Elsewhere, Jim even uses Albert Einstein’s theories of special and general relativity to work out how the rate at which you age is affected by gravity and the speed at which you move about.
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2018 Reines Lecture: Exploring the Universe with Gravitational Waves by Kip Thorne
The 2018 Reines Lecture was presented by Kip Thorne, winner of the 2017 Nobel Prize in Physics for the detection of gravitational waves. The discovery, part of the LIGO experiment, validated Albert Einstein’s longstanding prediction that during cataclysmic events the fabric of spacetime can be stretched, sending gravitational tremors across the universe. Thorne is a graduate of Caltech and Princeton University. His research has focused on Einstein’s general theory of relativity and on astrophysics, and he is co-founder of the LIGO Project. Among his many distinctions, Thorne has been awarded the Albert Einstein Medal, the UNESCO Niels Bohr Gold Medal, the Common Wealth Award for Science, and was named California Scientists of the Year. He was elected to the American Academy of Arts and Sciences, the National Academy of Sciences, and the Russian Academy of Sciences. In addition to his renowned scientific research in theoretical physics, he is involved in writing and movie production. Most notably, he worked on Christopher Nolan’s film Interstellar.
Exploring the Universe with Gravitational Waves: From the Big Bang to Black Holes
There are two types of waves that can propagate across the universe: electromagnetic waves and gravitational waves. Galileo initiated electromagnetic astronomy 400 years ago by pointing a telescope at the sky and discovering the moons of Jupiter. LIGO recently initiated gravitational astronomy by observing gravitational waves from colliding black holes. Thorne will describe this discovery, the 50 year effort that led to it, and the rich explorations that lie ahead.
The Reines Lecture Series honors Frederick Reines, UCI’s Founding Dean of Physical Sciences and co-recipient of the 1995 Nobel Prize for discovering the neutrino.
Gravitational Waves: A New Era of Astronomy Begins
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.
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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
The Future of Gravitational Wave Astronomy
Leading experts (including Nobel Prize Winner Rai Weiss) discuss the future and far future of gravitational wave astronomy from upgrading LIGO to larger ground based detectors such as The Einstein telescope and The Cosmic Explorer to spaced missions such as LISA, DECIGO and the Big Bang Observer. For a timeline of content see below:
RW =Rainer Weiss - MIT
BS =Bangalore Sathyaprakash - Penn State
SR = Shelia Rowan - Glasgow University
GG= Gabriela González Louisiana State
BFS = Bernard F Shutz - Cardiff University
JB = John F Beacom - Ohio State
MAM = Miguel Alejandro Mostafá - Penn State
00:00 SR on invisible messengers
00:30 narration on gravitational waves
1:21 RW on the first discovery
4:47 BS on first discovery
5:10 RW on the colliding black holes
5:30 BS on the mystery of the black hole masses and spins
6:41 GG on discoveries to date
7:46 narration on improving LIGO
8:10 SR on new technologies for imprivng ground based detectors
10:03 BS on upgrading LIGO
10:25 SR on new ground based detectors
11:38 narration on the Hubble tension
12:24 BFS on standard sirens and solving the Hubble tension
13:35 GG on larger ground based detectors beyond LIGO
15:19 RW on the above topic
15:44 BFS on the above topic
16:08 narration on LISA
16:23 SR on the need for a space based mission
17:39 RW on LISA
19:13 BFS on LISA
20:35 SR on LISA
20:48 RW on LISA
21:01 GG on LISA
22:26 RW on LISA
22:54 BS on surprises
23:17 RW on LISA
24:26 BS on pulsar timing arrays
25:39 narration on the mysteries that gravitational waves can unlock
25:55 BS on dark matter
27:26 narration on modified gravity
27:29 SR on modified gravity
29:14 BFS on dark matter
29:48 BS on dark energy
30:32 GG on dark energy
30:49 BFS on dark energy
32:27 BS on quantum gravity
33:49 BFS on quantum gravity
36:18 narration on multi messenger astronomy
36:42 JB on above topic
37:06 MAM on neutron star collisions
38:02 JB on neutrinos
38:27 MAM on AMON
40:39 narration on how do black hole and black binaries form
40:49 RW on above topic
41:12 JB on neutrinos and above topic
42:27 JB on the CNB cosmic neutrino background
44:26 MAM on cosmic rays
45:47 BFS on missions to look for primordial gravitational waves
48:07 RW on the Big Bang Observer
Gravitational Waves Explained Simply - LIGO Animation Introduction - Flawless Documentaries
Gravitational Waves Explained Simply To The Public , LIGO Animation Introduction Documentary - Flawless Documentaries
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Ultra-Compact Objects: Astronomy with Gravitational Waves
Jo Silk discusses the most compact objects that shine in the universe: neutron stars, and how new observations of gravity waves will revolutionise this field.
A lecture by Professor Jo Silk, Gresham Professor of Astronomy 3 October 2018
The most compact objects that shine in the universe are neutron stars. Black holes are even more compact objects that we view indirectly as matter accretes and heats up around them.
Professor Silk will describe the state of our knowledge of neutron stars and black holes, and how new observations of gravity waves are poised to revolutionise this field.
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 2,000 lectures free to access or download from the website.
Gravity, a Pressing Matter – Physics Documentary
Theoretical physicist Jim Al-Khalili seeks the true story of gravity and brings fresh perspective to the way that Galileo, Newton, and Einstein revolutionized science.
Featuring unexpected historical insights, cutting- edge science and exciting new experiments, we visit the LIGO lab in the USA where gravity waves were discovered, and uncover the latest theories about our cosmos that have come from studying the most intense sources of gravity imaginable – black holes.
From the award-winning team that brought you The Secret Life of Chaos.
Jim Al-Khalili investigates the amazing science of gravity, recreating groundbreaking experiments, including the moment when Galileo first worked out how to measure it. He investigates gravity waves, finds out from astronauts what it's like to live without gravity, sets out to find where in Britain gravity is weakest and so where we weigh the least, and helps design a smartphone app that volunteers use to demonstrate how gravity affects time and makes us age at slightly different rates
A fundamental force of nature, gravity shapes our entire universe. It sculpts galaxies and warps space and time. But gravity’s strange powers also affect our daily lives in the most unexpected ways. This is a story with surprises in store for Jim himself. In telling the story of gravity, his own understanding of the nature of reality comes to be challenged.
The science of gravity includes the greatest advances in physics, and in this BBC Four film Jim recreates groundbreaking experiments, including the moment when the Italian genius Galileo first worked out how to measure gravity. He investigates the latest breakthrough - 'gravity waves' - ripples in the vast emptiness of space, and finds out from astronauts what it’s like to live without gravity.
But gravity also directly affects all of us very personally, making a difference to our weight, height, posture and even the rate at which we age. With the help of volunteers and scientists, Jim sets out to find where in Britain gravity is weakest and so where we weigh the least. He also helps design a smartphone app that volunteers use to demonstrate how gravity affects time and makes us age at slightly different rates.
Finally, Jim discovers that, despite incredible progress, gravity still has many secrets to unveil.
Best Documentary Michio Kaku - Digital Medicine - Gravity Waves & Listener Questions
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The Gravitational Wave Astronomical Revolution - Prof. David Reitze
Recorded March 28th, 2018
In this talk, Dr. David Reitze discusses how the LIGO Observatories detect gravitational waves and how gravitational-wave observatories promise to revolutionize astronomy in the coming years and decades
In late 2015, the LIGO Observatories detected the collision and fusion of the two black holes, directly measuring for the first time the gravitational waves produced during the event. This discovery has profound implications for our understanding of the Universe. Gravitational waves provide unique information about the most energetic astrophysical events, revealing insights into the nature of gravity, matter, space, and time unobtainable by any other means..
Why String Theory is Right
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Are Virtual Particles A New Layer of Reality?
Hosted by Matt O'Dowd
Written by Matt O'Dowd
Graphics by Luke Maroldi
Assistant Editing and Sound Design by Mike Petrow
Made by Kornhaber Brown (
Why has string theory been the obsession of a generation of theoretical physicists? What exactly is so compelling about tiny, vibrating strings? In our last string theory episode I talked about what these things really are, and covered some history. In short: the strings of string theory are literal strands and loops that vibrate with standing waves. Simply by changing the vibrational mode you get different particles – analogous to how different vibrational modes on guitar strings gives different notes. And, by the way, strings exist in 6 compact spatial dimensions on top of the familiar 3.
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EPISODE 1 - LIGO: A DISCOVERY THAT SHOOK THE WORLD
Mirrors That Hang on Glass Threads is the first video by the Advanced LIGO Documentary Project, under its two-year grant from the National Science Foundation to film the new era of gravitational-wave astronomy. Sponsorship also is provided by MATHWORKS, Caltech and MIT. The era was launched by the historic detection of gravitational waves in September 2015, opening up the 95% of the universe that has been dark to our existing observatories and satellites. The video describes one of the brilliant, exquisite innovations in the 40-year search for gravitational waves - one that led to the detection of ripples in space time caused by the collision of two black holes 1.3 billion years ago. Director Les Guthman filmed the inside story of the discovery during the first year of the Advanced LIGO Documentary Project. His feature documentary, LIGO, will be released in fall 2018.
Gravitational Waves and Black Hole Collision Updates - LIGO Detector
Hello and welcome to What Da Math!
In this video, we will talk about colliding black holes and other gravitational waves detected by LIGO as of December 2018
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