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What happened before the Big Bang?

  • What Happened Before the Big Bang?

    13:51

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    We actually have a pretty good idea of what might have happened before the Big Bang. That is, as long as we define the Big Bang as the extremely hot, dense, rapidly expanding universe that is described by Einstein’s equations. That picture of the universe is very solid down to about a trillionth of a second after the supposed beginning of time. We can make good guesses down to about 10^-30th of a second. But before that?

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  • What happened before the Big Bang?

    14:35

    Understanding how the universe began has been a goal for scientists, philosophers, and theologians for millennia. In this video, Fermilab’s Dr. Don Lincoln describes the scientific view on this topic. He covers what we know, what we think, and what we may forever never know.

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  • What Came Before the Big Bang?

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    Modern science seems to agree that our universe began with a monumental explosion, but do we know what came before the Big Bang? Watch to find out!

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  • What Was Happening Before the Big Bang? w/Brian Greene | Joe Rogan

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  • EXCLUSIVE: Stephen Hawking on What Existed Before the Big Bang

    1:42

    In this exclusive clip, Tyson asks Hawking your standard softball interview question: what was around before the big bang? In other words, what happened before the moment the universe began? Check out Hawking’s answer:

    “The boundary condition of the universe...is that it has no boundary,” Hawking says.

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  • What existed before the Big Bang?

    1:58

    Scientists have a few theories.

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  • What Was Before The Universe? Before The Big Bang | Cinematic Short Space Documentary

    7:44

    Part of the Universe Project. A seven episode mini series about the universe.
    This video is purely for entertainment purposes.
    All video, photo and music licenses are available.

    Please enjoy the episode about the million dollar question what was before the creation of our known universe? What was before nothing? Find out in the final episode!

    So many things can be possible. all theories about the creation of our universe. Our cosmos has many secrets. From the creation to dark energy. From string theory to quantum mechanics

  • Before Time and Space | National Geographic

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    No explosion beats the Big Bang -- even if it was completely silent.
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  • What Triggered the Big Bang? | How the Universe Works

    7:45

    The Big Bang is one of science's most famous theories, but we now know it wasn't big and it wasn't a bang.

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  • The Beginning of Everything -- The Big Bang

    5:55

    How did everything get started?

    Has the universe a beginning or was it here since forever? Well, evidence suggests that there was indeed a starting point to this universe we are part of right now. But how can this be? How can something come from nothing? And what about time? We don't have all the answers yet so let's talk about what we know.

    Also, we try to make this one not depressing. Tell us if we succeeded.

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  • Did Time Start at the Big Bang?

    13:34

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    Our universe started with the big bang. But only for the right definition of “our universe”. And of “started” for that matter. In fact, probably the Big Bang is nothing like what you were taught.
    A hundred years ago we discovered the beginning of the universe. Observations of the retreating galaxies by Edwin Hubble and Vesto Slipher, combined with Einstein’s then-brand-new general theory of relativity, revealed that our universe is expanding. And if we reverse that expansion far enough – mathematically, purely according to Einstein’s equations, it seems inevitable that all space and mass and energy should once have been compacted into an infinitesimally small point – a singularity. It’s often said that the universe started with this singularity, and the Big Bang is thought of as the explosive expansion that followed. And before the Big Bang singularity? Well, they say there was no “before”, because time and space simply didn’t exist. If you think you’ve managed to get your head around that bizarre notion then I have bad news. That picture is wrong. At least, according to pretty much every serious physicist who studies the subject. The good news is that the truth is way cooler, at least as far as we understand it.


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  • What came before the Big Bang? How to get a Universe from no space, no time, no matter

    6:56

    Quantum Creation – what came before the big bang - the mechanism of a universe out of NO-thing - no matter, no space, and no time. Ancient Greek cosmologist Parmenides said “Nothing comes from nothing.” He was likely referring to the law of conservation of energy, that no new energy can be created. This is true and is a scientific fact even today. So how could the Universe come from nothing?

    Since the discovery of quantum physics and relativity, we have discovered a flaw in this argument that allows the creation of something from truly nothing. The Universe indeed had a beginning about 13.8 billion years ago, with the Big Bang. But what was there before the Big Bang? How did the universe come about from nothing. The flaw that we have uncovered in Parmenides original argument of “nothing comes from nothing” is that gravity has negative energy. And matter has positive energy.

    In a closed universe, a spontaneous splitting of 0 energy into an equal amount of positive energy and negative energy would not violate any conservation laws, because no new energy would have been created. And in quantum mechanics, anything that is not forbidden by conservation laws has a non-zero probability of occurring.

    But then we did not start with nothing. We started with the vacuum of physics, which has virtual particles that come in and out of existence, over very short periods of time. it has a weight and can be scientifically measured. So this is not nothing.

    So a more fundamental question is can a universe really be created with truly nothing – that means no-thing – no space, no matter, no time, no nothing? To answer this question, let’s work our way back from where we are now.

    If you solve Einstein’s equations for a universe like ours, you discover that it describes a universe that is either contracting or expanding. At the beginning of the big bang, it has a finite size, below which you cannot go any smaller. How does an explosion like the big bang occur from this finite size universe? In late 1979, a Stanford physics postdoc named Alan Guth offered an explanation for this bang or explosion. He showed that using the theories in particle physics, at extremely high energies — much higher than we could ever create in a lab — a special state of matter turns gravity upside down, causing it to be repulsive rather than an attractive force.

    A patch of space that contains even a tiny bit of this unusual matter, much smaller than the size of an atom, could repel itself so violently that it would blow up. And expand to a huge size. This would have happened for a very short time, a tiny fraction of a second, because this repulsive force quickly decays into the attractive force of gravity we see today. But this short period of time is enough to cause the “bang” in the big bang.

    So now we are at the Big Bang. We have a finite size universe with extremely high energy density that exploded in a brief inflationary period, and caused the big bang. Now, let’s go back further…the question now is how did a zero-size universe (a nothing) become Guth’s finite size universe.

    Physicist Alexander Vilenkin of Tufts University published a paper in 1984 that showed how this was possible using currently known laws of quantum mechanics. And he originated the idea of something called Quantum Creation. He showed that there is some energy barrier that the zero-size universe had to overcome in order to become finite size. This is where a phenomenon called quantum tunneling comes into play. It turns out that there is a probability, not very large, but a non-zero probability.

    Quantum tunneling is a real phenomenon that can be measured and is known to exist. Quantum mechanics shows that particles are waves of probabilities – and these waves have a non-zero probability of showing up spontaneously outside a barrier. This is how for example, an electron or even atom behind a barrier has a small probability of showing up on the other side of the barrier. Our zero-size universe can, through the process of quantum tunneling, become a finite size universe.

    And once it does that, then Guth’s cosmic inflation occurs, triggering the Big Bang. Then Einstein’s laws take over, and the universe’s expanding journey begins. And 13.8 billion years later, we observe the universe as we do today. So quantum mechanics gets you from zero size to a finite size, and then to the Big Bang. And then general relativity can get you from there to where we are today.

    And what triggered all this? In quantum physics, events do not necessarily have a cause, just some probability.
    So there is some probability for the universe to pop out of “nothing. If it is true, our existence had the humblest beginning of all - from nothingness itself.

    But you are still not starting with nothing, because you have to start with the laws of quantum mechanics. Where did these laws come from?

    #somethingfromnothing
    #quantumcreation

  • What really happened at the Big Bang?

    11:09

    The Big Bang is the term that scientists use to describe the beginning of the universe. In this video, Fermilab’s Dr. Don Lincoln clears up many common misconceptions about this fascinating topic.

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  • Naked Science - Birth of the Universe

    50:12

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    Where does a cup of coffee come from? In this film, it’s not Starbucks, it’s stars busting. We go right back to the beginning of time to show where the ingredients in your cup of coffee were born.

    The main ingredient is hydrogen; it makes up most of the water in your cup. And that formed in the big bang. How it got from there, into your cappuccino is one of the most dramatic stories in science. It has taken thousands of scientists to track its trail. We follow it through stars and galaxies, exploding supernovae, and giant clouds of gas to show just how it reached your cup.

    But that isn’t the end of the story. For where it goes in the future, depends on the fate of the universe. Will it carry on expanding for ever, or tear itself apart?

  • What was there before the Big Bang?

    12:01

    The universe was born 13.7 billion years ago with the Big Bang. But what was there before? Scientists are starting to get an answer thanks to the time-travelling Planck mission....

  • What Existed Before The Big Bang?

    1:18

    Caltech theoretical physicist Sean Carroll explores what existed before the Big Bang in his new book, The Big Picture.

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  • What Was There Before The Big Bang? | Earth Unplugged

    5:18

    The common theory is that the universe began with the big bang, but what was there before?

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  • What If the Big Bang Didnt Start the Universe

    8:06

    Think about it. If everything started with a Big Bang, what was before that? How big is our universe if it keeps expanding? Will it ever stop? There’s so little we know about the endlessness of space… but scientists do have some incredible theories! A mere hundred years ago, though, people believed the cosmos consists entirely of one galaxy — our own Milky Way. Scientists didn’t know the age of the universe or that we live in just one tiny piece of it.

    The first person to notice that our galaxy has friends — countless other galaxies and interstellar clouds — was Edwin Hubble. He found that some objects are too far away to be in our Milky Way. He later discovered that the greater the distance from Earth, the faster a galaxy moves away from us! It means our universe is constantly expanding. But where did this expansion start?

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    Something Strange Is Glowing in the Milky Way Right Now
    9 Earth-Like Planets We Can Move On Right Now

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  • Origins of the Universe 101 | National Geographic

    5:50

    How old is the universe, and how did it begin? Throughout history, countless myths and scientific theories have tried to explain the universe's origins. The most widely accepted explanation is the big bang theory. Learn about the explosion that started it all and how the universe grew from the size of an atom to encompass everything in existence today.
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  • How time might have existed before the Big Bang

    59

    Marcus du Sautoy, mathematician and author of The Great Unknown, explained why we don't really know what happened before the Big Bang.

    He told Business Insider: We’re really not too sure and in fact, that may be a question that doesn’t even make sense because time, we think, started at the Big Bang. So it doesn’t make sense to talk about before if you haven’t got time there in the first place.

    He went on to say that one idea centres around eons of time.

    He explained this is when it looks like time is going to run out and stop and each of these beginnings and ends might be able to be glued together to make an infinite sequence of time.

    So actually there may be something always before the, before the, before the, before the, before the, before the, before.

    Marcus du Sautoy's book The Great Unknown is available for purchase now.



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  • What Caused the Big Bang?

    13:28

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    Every astronomy textbook tells us that soon after the Big Bang, there was a period of exponentially accelerating expansion called cosmic inflation. In a tiny fraction of a second, inflationary expansion multiplied the size of the universe by a larger factor than in the following 13 and a half billion years of regular expansion. This story seems like a bit of a … stretch. Is there really any mechanism that could cause something like this to happen? What what we’re covering today – the real physics of cosmic inflation.

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    Most cosmologists buy some variation of the inflation hypothesis. It seems to very neatly solve some of the biggest questions in cosmology. Those being: why is matter and energy so smoothly spread out across the entire observable universe? And why is the geometry of the universe so flat? Neither should be expected unless the universe expanded much more rapidly early on. We explored these problems in an earlier video – worth a look if you really want to get inflation. Another problem fixed by inflation is the absence of magnetic monopoles – strange particles predicted to have been produced in the early universe. We’ll come back to those another time.


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  • Explaining The Big Bang One TRILLIONTH Of A Second At A Time

    14:21

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    The universe is everything we can see and as far as we can see. For years we've been trying to figure out how it all began, but have we finally figured out how everything came to be?

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    “The Planck time: 10-43 seconds. After this time gravity can be considered to be a classical background in which particles and fields evolve following quantum mechanics.

    What Is the Big Bang Theory?:


    “The Big Bang Theory is the leading explanation about how the universe began. At its simplest, it talks about the universe as we know it starting with a small singularity, then inflating over the next 13.8 billion years to the cosmos that we know today.

    How Are Light And Heavy Elements Formed?:


    “The lightest elements (hydrogen, helium, deuterium, lithium) were produced in the Big Bang nucleosynthesis. According to the Big Bang theory, the temperatures in the early universe were so high that fusion reactions could take place.

    Planck Mission Brings Universe Into Sharp Focus:


    “The Planck space mission has released the most accurate and detailed map ever made of the oldest light in the universe, revealing new information about its age, contents and origins.

    How the Big Bang Theory Works:


    “Because of the limitations of the laws of science, we can't make any guesses about the instant the universe came into being. Instead, we can look at the period immediately following the creation of the universe.

    The Universe Is 13.82 Billion Years Old:


    “The Universe is a wee bit older than we thought. Not only that, but turns out the ingredients are a little bit different, too. And not only that, but the way they’re mixed isn’t quite what we expected, either.

    The Big Bang:


    “Astronomers combine mathematical models with observations to develop workable theories of how the Universe came to be.

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    “Why is a powerful infrared observatory key to seeing the first stars and galaxies that formed in the universe? Why do we even want to see the first stars and galaxies that formed?

    Our Expanding Universe: Age, History & Other Facts:


    “The universe was born with the Big Bang as an unimaginably hot, dense point. When the universe was just 10-34 of a second or so old — that is, a hundredth of a billionth of a trillionth of a trillionth of a second in age — it experienced an incredible burst of expansion known as inflation, in which space itself expanded faster than the speed of light.

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  • What Happened before the Big Bang?Full DocumentaryHD

    1:13:58

    Astronomers are pretty sure what happened after the Big Bang, but what came before? What are the leading theories for the causes of the Big Bang?

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  • Neil deGrasse Tyson: What Happened Before The Big Bang?

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  • Stephen Hawking Knows What Happened Before the Big Bang

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  • Answer: What happened before the Big Bang?

    2:00

    Answer from John Mather.

  • This Is What Caused The Big Bang

    10:54

    I have a NEW channel ► Meet, Arnold! -

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    Subscribe to Ridddle channel. We will make this universe smarter together!
    Okay, okay. I got to go..... See You Soooooooooooooooon dudes ;)

  • Before the Big Bang 5: The No Boundary Proposal

    50:48

    In this film Stephen Hawking, James Hartle and Thomas Hertog explain their model of the early universe: The No Boundary Proposal. In the 1960’s and 70’s Hawking and Penrose showed that according to classical general relativity, given some minimal assumptions the origin of an expanding universe is a singularity: a point of infinite density and spacetime curvature. But this and other singularity theorems do not take into account the strange world of quantum mechanics. So in the 1980’s Hawking and collaborators started to build a model of the big bang that included quantum effects.The result is the No Boundary Proposal, a model that may be able to explain some of the deepest mysteries of the cosmos such as, is there a multiverse? how is there an arrow of time and what really happened a the big bang?
    This is the fifth in a series of films exploring competing models of the early universe. To see the other films click here:

    Subscriptions and shares are very much appreciated.


    Produced and written by SkydivePhil and Monica
    Producers NIck Franco & Ernie Pay
    Director Nick Franco
    Original Score Pete Blyth - PETEBLYTH.COM
    Ernie Pay : Director of Photography
    Presenter: Monica C
    Sound:William Corbet
    Animations Morn1415


    For this film we hope you will notice a significant improvement in quality and this is very much down to 1185 films who co produced the film to ensure it has a beautiful cinematic look, feel and sound. To see more of their work click here:



    Timeline of topics discussed:
    00-1:19 intro
    1:19 Singularity theorems
    3:44 Hawking’s work on black holes and what they mean for the origin of the universe
    4:11 Introducing the No Boundary Proposal in 1981
    5:13 The key concept is the wave function
    5:39 Feynman’s sum over histories
    6:15 Explaining the concept of a path integral
    6:40 What is Euclidean Spacetime?
    7:36 Imaginary numbers and imaginary time
    9:12 Explaining the Formula for the No Boundary Wavefunction
    10:19 The shuttlecock
    11:59 Inflation and the No Boundary Proposal
    14:22 Predictions of the the theory
    16:20 Falsification
    16:55 Bottom Up versus Top Down
    20:12 Eternal Inflation and the Multiverse
    22:46 The No Boundary Proposal implies Inflation is not fine tuned
    23:31 The No Boundary Proposal and the Cosmological Constant problem
    25:33 Measure Problem, there’s a simpler way of doing it
    26:532 Fine tuning and probability
    27:16 Weinberg’s prediction of the cosmological constant and The No Boundary Proposal
    28:30 Could the constants of nature be necessary?
    29:25 Is the multiverse science?
    31:03 The Boltzman Brian Problem
    32:53 Stephen, Jim and Thomas’s latest work : holography and the No Boundary Proposal
    35:18 Next Steps in Making the No Boundary Wave function more precise
    37:14The Ground State
    38:18 The Arrow of Time
    39:27 Roger Penrose
    39:50 A Big Bounce?
    40:14 Aron Wall claims the No Boundary Proposal is eternal into the past
    42:14 More on the Big Bounce
    43:50 Alex Vilenkin alternative to the No Boundary Wavefunction
    46:41 String theory
    46:37 Unifying the Dynamics and the initial conditions of the universe
    47:14 George Lemaitre in the multiverse in the 1930’s
    47:58 Summing up

  • What Came Before The Big Bang?

    4:27

    What Came Before The Big Bang? How was the universe created? Watch as we explore all the scientific ways of what came before the big bang.


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  • Before The Big Bang - Documentary 2018 HD

    1:27:35

    How did time and space begin? From the age of ten, Sean Carroll has wanted to know. He first read about the big bang model of the universe as a child. Later

  • What If The Big Bang Wasnt The Beginning? | Unveiled

    7:08

    The Big Bang Theory is widely held as the most plausible explanation for the beginning of everything - Earth, the solar system, other galaxies and the universe. But, what if it wasn't? What if there was something else... before the Big Bang? In this video, Unveiled explains the Big Bounce Theory and other ideas about how the universe might've been created!

    This is Unveiled, giving you incredible answers to extraordinary questions!

    Find more amazing videos for your curiosity here:
    What Sky Looks Like on Other Planets -
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    Are you constantly curious? Are you a fiend for facts? Then subscribe for more from Unveiled ►

    #Science #BigBang #Multiverse #Physics #Universe #Space

  • What Came Before the Big Bang?

    2:21

    New videos DAILY:

    Join Big Think Edge for exclusive video lessons from top thinkers and doers:

    ----------------------------------------------------------------------------------

    Where exactly did the Big Bang happen? Well, nowhere—and everywhere. As NASA's Michelle Thaller explains, thinking of the origins of our universe as an explosion with a central hub is misleading. The Big Bang wasn't an explosion of matter, it was an expansion of space itself, she says. We don't know how big the universe is, but the general consensus is that there is no edge to the universe, and no center either.To visualize the Big Bang accurately, imagine an inflated balloon and pay attention just to the surface of it — Pretend that there's no such thing as inside or outside of the balloon, just the two-dimensional surface of the rubber. We are living on the surface of that balloon, only able to shine a light in one direction or the other. All of it is expanding and every part of it is filled with galaxies—no matter where you are in the universe.

    ----------------------------------------------------------------------------------

    MICHELLE THALLER

    Dr. Michelle Thaller is an astronomer who studies binary stars and the life cycles of stars. She is Assistant Director of Science Communication at NASA. She went to college at Harvard University, completed a post-doctoral research fellowship at the California Institute of Technology (Caltech) in Pasadena, Calif. then started working for the Jet Propulsion Laboratory's (JPL) Spitzer Space Telescope. After a hugely successful mission, she moved on to NASA's Goddard Space Flight Center (GSFC), in the Washington D.C. area. In her off-hours often puts on about 30lbs of Elizabethan garb and performs intricate Renaissance dances. For more information, visit
    NASA.

    ----------------------------------------------------------------------------------

    TRANSCRIPT:

    MICHELLE THALLER: Elissa, you have asked one of the best questions in all of astronomy: The Big Bang was the start of our universe so where was the locale? Where did the Big Bang actually happen? And what I really love about this question is it gives me a chance to talk about some of the misperceptions we have about the Big Bang. And when I hear the term 'Big Bang' that implies an explosion. And we all know how explosions work from our experience: things actually fly out from a common center. And one of the things is scientists really don't like describing the Big Bang as an explosion at all, that sort of sets you up in the wrong direction right away because you can imagine that there are galaxies all flying apart away from each other, away from a common center, and flying out into empty space. And the universe we observe is absolutely nothing like that. For example, the whole volume of the universe that we can see with the Hubble Space Telescope — we can see to a distance of nearly 13 billion light years — all of that volume is filled with galaxies. There is no empty center to the universe. And the other thing that we don't observe and we're pretty sure that nobody else ever could either is being on the edge of that, being on a galaxy right on the edge of expansion and seeing all of the galaxies in one direction because you're looking inside and nothing but empty space on the outside. Space never looks like that. All around us we see galaxies; the universe is filled with them.

    So what's really going on here? And this really gets at the crux of what the Big Bang was. The Big Bang wasn't an explosion of matter, it was an expansion of space itself. So that simply means that any amount of space in the universe is expanding and everything is getting farther away from everything else. I know that's very hard to visualize. Some people talk about blowing up a balloon and this always, to me, can put you in the wrong direction because they say 'Ah-ha! A balloon has an empty center, everything expands away from it.' What they haven't told you is you need to pay attention just to the surface of the balloon. Pretend that there's no such thing as inside or outside of the balloon, just the two-dimensional surface of the rubber. As you blow into it, that expands in every direction. If you were to draw little points on the surface of the balloon, every little point would start getting farther away from every other little point. But if you were a two-dimensional creature that could only travel on the surface of the balloon, you could only shine a light, you couldn't possibly even know about what's up or what's down, if you were completely two-dimensional, you would see every point expanding away from every other point but there would be no empty center.

    So the question is, in our three-dimensional universe do ...

    For the full transcript, check out

  • What Happened Before The Big Bang?

    11:51

    What happened before the big bang? That’s the most difficult question. Today, with the Hubble Telescope, we can see more than 100 billion galaxies, and in each of them perhaps hundreds of billions of stars. But how did this happen? Why is there something and why isn’t there “not nothing”? This question is a big problem for many religions. It seems that someone had to create a universe, as big as it is, as all of this can’t happen of nothing.

    Follow us on:

    Credit: NASA, ESA, ESO, SpaceX, Wikipedia, Shutterstock, ...

    TheSimplySpace - on the trail of the mysteries of the universe

    Planets with hot ice? Celestial bodies larger than their own sun? What is relic radiation and what is dark matter exactly? Astronomers do an exciting job. Like adventurers, they are on the trail of the secrets of the universe and discover the strangest phenomena. Many phenomena in the universe can be explained, but most of them cannot. Researchers agree that there was a Big Bang around 13.8 billion years ago. But what was before? Nobody knows.

    Are you curious about the universe and want to accompany the astrophysicists of this world on their exciting knowledge tours? TheSimplySpace's videos explain the latest research from NASA and others in an informative and entertaining way.

    Be there, subscribe to TheSimplySpace and join in the discussion!

  • What Happened Before the Big Bang?

    24:19

    UNSW Physics Outreach investigates some of the biggest questions in physics.
    In this episode we asked six scientists (from various institutions) at the University of New South Wales what they think happened before the Big Bang.

    Next Documentary Are We Alone in the Universe?:

    Speakers:
    Prof. Paul Davies (Arizona State University):
    Dr. Jonti Horner (University of Southern Queensland):
    Dr. Lucyna Kedziora-Chudczer (UNSW Australia):
    Dr. Jonty Marshall (UNSW Australia):
    Dr. Vincent Smith (University of Bristol):
    Mr. Shane Hengst (UNSW Australia):

    Credits:
    Director, Camera & Editor: Don Kountouris
    Special Thanks: Footage Island, NASA ArtSpace & Beachfront B-Roll

  • Can We Know What Happened Before the Big Bang?

    2:27

    Physicist Neil Turok on how far back to the origin of the universe science might be able to actually take us.

    An excerpt from The Origins of the Universe: Why Is There Something Rather than Nothing? featuring Steve Paulson, Neil Turok, Jim Holt, and David Albert.

    The New York Academy of Sciences
    Tuesday, October 14, 2014

  • Was the Universe Born in a Black Hole? - Horizon: What Happened Before The Big Bang? - BBC Two

    2:27

    Subscribe and ???? to OFFICIAL BBC YouTube ????
    Stream original BBC programmes FIRST on BBC iPlayer ????



    Professor Lee Smolin from the Perimeter Institute gives his theory on the beginning of the universe.
    He believes that that our universe is in fact the offspring -- via a black hole -- of a galaxy far, far away in another universe.
    His idea is called cosmological natural selection. An elegant if controversial Darwinian approach to astro-physics.

    #bbc
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  • The Next Universe: What Came Before the Big Bang? | Reel Truth Science

    35:37

    What came before the big bang? What happens when our universe ends? Eminent theoretical physicist Roger Penrose presents his extraordinary new view of the comsos.

    For more awe inspiring documentaries, subscribe to our channel:

    Welcome to Reel Truth. Science the home of inspiring documentaries from the scientific and medical world. Here you can find full length documentaries to discover and explore.

    #reeltruthscience

  • What was there before the Big Bang in hindi? - Big Bang से पहले क्या था ?

    8:13

    What was there before the Big Bang? or better say, What came before the Big Bang?

    The Big Bang Theory is the leading explanation about how the universe began. At its simplest, it says the universe as we know it started with a small singularity, then inflated over the next 13.8 billion years to the cosmos that we know today.

    Because current instruments don't allow astronomers to peer back at the universe's birth, much of what we understand about the Big Bang Theory comes from mathematical formulas and models. Astronomers can, however, see the echo of the expansion through a phenomenon known as the cosmic microwave background.

    While the majority of the astronomical community accepts the theory, there are some theorists who have alternative explanations besides the Big Bang — such as eternal inflation or an oscillating universe.

    This Episode deals with the question of What was there before the big bang in Hindi. So watch it.

    ----------------------------------------------
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    (2) Written and Edited by - Ravi Kumar

    (3) Background Music Credit - Audioblocks

    (4) Footage Credit - NASA

    You can watch our other videos by clicking on below given links:
    Our Last Episode:
    (a) Voyager Interstellar Mission in Hindi -

    (b)Time Crystals : A New 4-D Matter - Explained in Hindi | Complete Information -

    (c)Dark Matter & Dark Energy in Hindi - Complete Information | क्या हैं डार्क मैटर और डार्क एनर्जी -

    (d) What are White Holes(in Hindi) -

    You can watch our Other Episodes by clicking on below given links:
    (a)Top 10 Upcoming NASA Space Missions in Hindi |भविष्य में नासा द्वारा छोड़े जाने वाले 10 प्रमुख यान -

    (1) What are Black Holes in Hindi -

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  • Universe | What Happened Before the Big Bang

    12:21

    It is difficult enough to imagine a time, roughly 13.7 billion years ago, when the entire universe existed as a singularity. According to the big bang theory, one of the main contenders vying to explain how the universe came to be, all the matter in the cosmos -- all of space itself -- existed in a form smaller than a subatomic particle.

    Once you think about that, an even more difficult question arises: What existed just before the big bang occurred?

  • 4 What Happened Before The Begining

    44:32

    Through The Wormwhole S01E04

  • Before the Big Bang 4 : Eternal Inflation & The Multiverse

    59:54

    Interviews with Alan Guth & other leading cosmologists going into far more depth than average tv show but still accessible to the interested layperson.
    What happened before the big bang? In this series of films we explore competing models of the early universe, with this episode focusing on the dominant paradigm for early universe cosmology: inflation. The father of inflationary theory Alan Guth takes us on a tour of inflationary theory and explains why cosmologists find it so compelling and why it leads to a multiverse. Fellow theorists Anthony Aguirre and Yasunori Nomura help us explore more of the details of the theory and try to answer many of its challenges. George Efstathiou, one of the world’s leading observational cosmologists (who gave the press conference for the European Space Agency’s Planck cosmology results ) helps us assess the empirical status of the theory.

    We cover such topics as what is the history and evidence for inflation? how does it lead to a multiverse? Is there empirical evidence for a multiverse? How did the arrow of time form? What is the future for cosmology? What about the supposed problems of inflation, such as unlikely initial conditions, speculative physics, Boltzman brains and the measure problem? Can eternal inflation be past as well as future eternal? Did the universe have an absolute beginning or has it always existed? Whats the connection between the multiverse and black holes? What is the connection between the quantum many worlds and the cosmological multiverse?

    PLEASE NOTE: All the scientists in this film viewed a draft and approved it before we released it to youtube.

    For our earlier films in this series see here:

    For a timeline of who says what when , see below:
    AG=Alan Guth, AA =Anthony Aguirre, GE= George Efstathiou , YN =Yasunori Nomura
    00:00 introduction
    1:06 AG on the monopole problem and the founding of inflation
    2:37 AG on the problems inflation solves
    5:14 AA on how inflation solves the problems 
    6:02 narration on virtual particles/inflation and then introducing George Efstathiou 
    6:45 GE on Planck launch 
    7:23 GE on evidence for inflation
    9:17 AG on how inflation to leads to eternal inflation 
    11:47 AG explains a scalar field 
    12:30 narration on inflaton field
    12:41 GE on Planck data strongly favouring eternal inflation and the multiverse
    13:48 narration on direct detection of other universes
    13:55 AA explains looking for bubble collision
    18:27 AG on string theory and eternal inflation 
    19:37 AA on above subject 
    19:59 YN on above subject 
    20:36 narration on the critics of inflation 
    20:49 AG on Coleman de lucia tunneling 
    22:17 YN on higgs instability blocking inflation 
    24:03 AG on probability of inflation 
    24:35 Ag on the measure problem 
    26:16 YN on above 
    27:13 AG on Boltzman brains 
    30:52 AG on inflation before or after the big bang?
    31:37 GE on the above
    32:22 AG on past eternal universe, entropy etc 
    38:39 AA on above 
    40:23:19 narration on anthropics
    40:45 AG on above
    42:30 YN on above
    42:59 narration on many world = multiverse
    43:31 YN on above 
    43:29 Yn on static quantum multiverse
    49:05 GE on is the multiverse science?
    49:56 YN on falsifiability 
    50:47 narration on alternatives
    50:53 AA on alternatives and B modes
    53:47 narration on tilt of the gravity wave spectrum 
    54:04 AG on tilt and string gas cosmology 
    54:31 GE on above
    54:59 AG on before inflation 
    55:45 AG on next steps 
    57:45 GE on beyond Planck 
    59:10 end narration

  • What Happened Before the Big Bang?

    1:49

    Dr. Lucyna Kedziora-Chudczer discusses her opinion on the subject of what happened before the big bang.

    Speaker:
    Dr. Lucyna Kedziora-Chudczer (UNSW Australia)

    Director: Don Kountouris

    Camera & Editor:
    Don Kountouris

    Special Thanks:
    Footage Island, NASA ArtSpace & Beachfront B-Roll

  • How Universe Was Made | Before The Big Bang - Space Documentary

    52:26

    In the first second after the universe began, the surrounding temperature was about 10 billion degrees Fahrenheit (5.5 billion Celsius), according to NASA. The cosmos contained a vast array of fundamental particles such as neutrons, electrons and protons. These decayed or combined as the universe got cooler.

    This early soup would have been impossible to look at, because light could not carry inside of it. The free electrons would have caused light (photons) to scatter the way sunlight scatters from the water droplets in clouds, NASA stated. Over time, however, the free electrons met up with nuclei and created neutral atoms. This allowed light to shine through about 380,000 years after the Big Bang.

    This early light — sometimes called the afterglow of the Big Bang — is more properly known as the cosmic microwave background (CMB). It was first predicted by Ralph Alpher and other scientists in 1948, but was found only by accident almost 20 years later. [Images: Peering Back to the Big Bang & Early Universe]

    Arno Penzias and Robert Wilson, both of Bell Telephone Laboratories in Murray Hill, New Jersey, were building a radio receiver in 1965 and picking up higher-than-expected temperatures, according to NASA. At first, they thought the anomaly was due to pigeons and their dung, but even after cleaning up the mess and killing pigeons that tried to roost inside the antenna, the anomaly persisted.

    Simultaneously, a Princeton University team (led by Robert Dicke) was trying to find evidence of the CMB, and realized that Penzias and Wilson had stumbled upon it. The teams each published papers in the Astrophysical Journal in 1965.
    #Space #Documentary #BigBang

  • Search For Life - What Happened Before The Big Bang? Space Documentary

    2:38

    The SETI Institute is bringing SETI Talks to San Francisco for the first time, thanks to a partnership with U.C. Berkeley Extension. Three scientists will discuss their individual approaches to answering the question, “are we alone?” and how they are searching for life elsewhere in the universe. Will we find a so-called technosignature, evidence of advanced technological civilizations? Should we explore places in our solar system with liquid water, such as Europa or Enceladus, for microbial life? And what can the study of exoplanets tell us about the possibility of extraterrestrial life? What are the near-term chances of discovering some form of life elsewhere?

  • Before the Big Bang 7: An Eternal Cyclic Universe, CCC revisited & Twistor Theory

    55:26

    This is part update, part remake of our earlier film on Sir Roger Penrose’s Conformal Cyclic Cosmology(CCC). If you haven't seen the first one, don’t worry, you don’t need to. If you have seen our first film there is plenty of new material and updates that weren't covered . So hopefully both audiences should be catered for in this version. We also give a layman explanation for Twistor Theory.
    The film is a part of series fo films exploring competing models of the big bang, In previous episodes we have interviewed cosmologists such as Stephen Hawking, Alan Guth and many other leading figures in the field.
    You can see those episodes here:


    We want to remake the first two films in this series as the quality of these we feel was low. Also in the case of CCC, there have been many fascinating new developments since the first film came out.
    There were will be future films on other models too.
    Conformal Cyclic cosmology is a scheme whereby the universe is seen to be cyclic even though it never recollapses and bounces back out. Instead it undergoes whats called a conformal rescaling. What’s that ? Watch the film, all will be explained. CCC promises to solve many deep mysteries in cosmology such as why was the entropy of the big bang so low? What happened before the big bang? where does the dark matter in our universe come from? We address both the theory of CCC and the possibility of experimental verification. We also address criticisms of the theory.
    All of the scientists in the film saw a draft and approved it before release.
    A detailed description of the topics discussed is below:
    0 Introduction
    1:03 What is CCC?
    1:51 Explaining conformal geometry
    3:31 Connecting conformal geometry to cosmology
    5:24 How to remove the singularity with a conformal rescaling
    8:05 Solving the low entropy mystery
    10:30 CCC and the information paradox
    13:28 firewalls
    14:28 Is the entropy fine tuned for life?
    15:33 The creators aim
    17:31 Fine tuning: is it real ? necessity? multiverse or cycles?
    20:21 How CCC explains dark matter
    24:49 Has LIGO seen hints of CCC?
    26:24 Responding to Sabine Hossenfelder
    28:55 Circles in the CMB Sky, evidence for CCC?
    36:17 BICEP 2, B modes and primordial magnetic fields
    38:40 Responding to William Lane Craig
    44:15 Cosmic Jerks and Snaps
    46:38 Twistor Theory
    51:39 do we need quantum gravity? challenging the conventional view
    53:23 CCC and back holes
    54:50 summing up

  • Before the Big Bang 1O : Black Hole Genesis

    48:20

    We interview the creators of 3 models of the early universe that imply the big bang came from a black hole in a mother universe. The models are Cosmological Natural Selection (CNS), The Holographic Big Bang and Cosmology with Spin and Torsion. The creators interviewed are Lee Smolin, Nikodem Poplawski and Niayesh Ashfordi. Recently it has also been shown that a theory of quantum gravity called Causal Set Theory may realise CNS. And so we also talk to Stav Zalel who has worked on this idea and cosmologist Aureliein Barau

    The order of subjects is
    LS: Lee Smolin NA: Niayesh Ashfordi SZ: Stav Zalel NP: Nikodem Poplowski AB: Aurelien Barau
    00:00 Introduction
    51:55 LS and SZ on CNS
    3:53 the prehistory of CNS
    6:08 NA doubt on fine tuning
    7:33 NA on The Holographic Big Bang
    10:32 NA explains The Holographic Principle
    13:41 NP on Cosmology with Spin and Torsion
    16:16 NP on anti matter
    17:44 SZ on quantum gravity
    18:21 LS and NP on the big bounce
    20:23 SZ and AB on Causal Set Theory
    21:32 SZ on comparison with Loop Quantum Gravity
    21:47 AB and SZ on predicting the cosmological constant
    23:24 SZ on linking CNS and Causal Set Theory
    24:53 NA on string theory connection
    25:46 LS on neutron star predictions
    30:15 LS on inflation and CNS
    31:08 NP on inflation and torsion
    33:08 NA on replacing inflation
    35:25 LS on CNS versus eternal inflation
    36:55 NA on the difference between CNS and The Holographic Big Bang
    37:14 LS, NP and NA on entropy
    38:40 LS and NA on Roger Penrose’s criticism
    40:47 LS, NP, SZ and NA on an eternal past
    43:49 LS on answering Leonard Susskind
    44:39 LS on scare resources
    45:08 NA on CMB predictions
    46:06 LS summing up

  • What Happened At The Beginning Of Time? - with Dan Hooper

    51:33

    We’re learning more and more about the recent history of our universe, but how much do we really know about its very first few seconds?
    Dan’s book At The Edge Of Time is available now -

    Watch the Q&A:

    Ever since Edwin Hubble observed that the universe was expanding in 1929, cosmologists have had their work cut out for them trying to solve the seemingly impossible questions arising from the time immediately after the Big Bang.

    In this talk Dan Hooper explores the perplexing problems surrounding the secrets of the early universe, and the far-reaching implications some of the answers might have for the understanding of the universe we think we have today.

    Dan Hooper is Senior Scientist and the Head of the Theoretical Astrophysics Group at the Fermi National Accelerator Laboratory. He is also an Associate Professor in the Department of Astronomy and Astrophysics at the University of Chicago. Previously, he was the David Schramm Fellow at Fermilab, and a postdoc at the University of Oxford. In 2003, he completed his PhD in physics at the University of Wisconsin.

    This talk was filmed in the Ri on 10 February 2020.

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  • What came before the Big Bang? | Elevator Pitch

    5:28

    What happened before the big bang? How can something come from nothing?

    We’ve challenged a physicist to explain the origins of our universe in one elevator ride. Good luck Dr Julian Berengut, from University of New South Wales.


    Subscribe:
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    This is an official Australian Broadcasting Corporation YouTube channel.
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    Contributions may be removed if they violate ABC's Online Conditions of Use (Section 3).

  • What happened before the Big Bang?

    34

    John Mather will answer a selection of questions which will be posted shortly.

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