Did Time Start at the Big Bang?

  • Publicado el Hace un mes

    PBS Space TimePBS Space Time

    duración: 13:34

    Thanks to LastPass for sponsoring PBS DS. You can check out LastPass by going to lastpass.onelink.me/HzaM/2019Q3JulyPBSspace
    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.

    Check out the new Space Time Merch Store!
    pbsspacetime.com/
    Support Space Time on Patreon
    www.patreon.com/pbsspacetime
    Hosted by Matt O'Dowd
    Written by Matt O'Dowd
    Graphics by Leonardo Scholzer
    Directed by Andrew Kornhaber
    Produced By: Kornhaber Brown
    Big Bang Supporters:
    Anton Lifshits
    David Nicklas
    Fabrice Eap
    Juan Benet
    Justin Lloyd
    Morgan Hough
    Quasar Supporters:
    Mark Heising
    Mark Rosenthal
    Tambe Barsbay
    Vinnie Falco
    Hypernova Supporters:
    Chuck Zegar
    Danton Spivey
    Donal Botkin
    Edmund Fokschaner
    Hank S
    John Hofmann
    John R. Slavik
    Jordan Young
    Joseph Salomone
    kkm
    Mark Heising
    Matthew
    Matthew O'Connor
    Syed Ansar

    Gamma Ray Burst Supporters:

    Adrien Hatch
    Alexey Eromenko
    Andreas Nautsch
    Bradley Jenkins
    Brandon Labonte
    Carlo Mogavero
    Daniel Lyons
    David Behtala
    DFaulk
    Dustan Jones
    Geoffrey Short
    James Flowers
    James Quintero
    John Funai
    John Pollock
    Jonah
    Jonathan Nesfeder
    Joseph Dillman
    Joseph Emison
    Josh Thomas
    Kevin Warne
    Kyle Hofer
    Malte Ubl
    Mark Vasile
    Nathan Hitchings
    Nick Virtue
    Paul Rose
    Ryan Jones
    Scott Gossett
    Sigurd Ruud Frivik
    Tim Jones
    Tim Stephani
    Tommy Mogensen
    Yurii Konovaliuk
    سلطان الخليفي

    Space  Outer Space  Physics  Astrophysics  Quantum Mechanics  Space Physics  PBS  Space Time  Time  PBS Space Time  Matt O’Dowd  Astrobiology  Einstein  Einsteinian Physics  General Relativity  Special Relativity  Dark Energy  Dark Matter  Black Holes  The Universe  Math  Science Fiction  Calculus  Maths  Holographic Universe  Holographic Principle  Holography  Holographs  Reality  Consciousness  EHT Black Hole  Event Horizon Telescope  

Jonathan Capps
Jonathan Capps

I was focused on his left sleeve the entire episode.

Hace 3 horas
NASOOOBEE
NASOOOBEE

what is wrong with your shoulders mate? and your videos are really terrible. each next video contradicts the previous one. Good job with the female hair aswell.

Hace 8 horas
مدح غير الله شرك
مدح غير الله شرك

And the expansion of the universe mentioned in the holy qur'an : With power did We construct the heaven. Verily, We are Able to extend the vastness of space thereof Adh-Dhariyat : 47

Hace 10 horas
fahkrazyshaggy
fahkrazyshaggy

I have so many questions about the big bang. Like how does the great attracters play in to this

Hace 11 horas
teleman07
teleman07

Everything makes sense until you ask the question "why". Surely there should have been no big bang and nothing should exist at all. Why the universe exist with all this arbitrary mathematical constants and connections. Even if there are infinite number of universes where shiit like white holes exist and time goes backwards for chemical reactions and whatnot. Why TF is this the case?

Hace 20 horas
Jackaloopt
Jackaloopt

I believe that our singularity/Big Bang is just the output of a black hole.

Hace un día
Open Wide
Open Wide

That's what I'm thinking too...

Hace un día
David DeLaney
David DeLaney

The other thing encountering a singularity in your theory's math can indicate is that near there, you're using the wrong type of coordinates. (Examples: the singularity in the ordinary metric at the surface of a black hole; the singularities in Feynman diagrams from self-interaction loops, which 'renormalization' can solve.) This is even visually easy to see ... by looking at that same North Pole with longitude lines converging on it. Locally, the North Pole doesn't look any different from anywhere else on the sphere (just colder) - it's trying to measure things near it with a 'grid' made of lines converging from every direction that messes things up. --Dave, will mathsplain for food

Hace un día
Sharath S Pawar
Sharath S Pawar

Towards the end i thought youtube encountered a glitch in the suggestion where it started playing next video with Dope trance track even before previous video end :-D

Hace un día
Joker3000
Joker3000

7:04 my mind was blown by the position of the north pole! Thank u for showing! ;)

Hace un día
Bobby You Tube
Bobby You Tube

I don't give a rats ass what you call it or how you explain it. You'll NEVER be able to explain WHY.

Hace un día
Petteri Tuovinem
Petteri Tuovinem

is it even meaningful to speak of an expansion in an infinite universe

Hace un día
Carl Wheeler
Carl Wheeler

Too many theories. I feel like these physicists are proposing these theories just to grab some attention. So.. I have come up with a theory; "The Universe is just the atomic structure of a huge cosmic dog turd."

Hace 2 días
Jeff Allen
Jeff Allen

I find it amazing how twisted these egg heads get when trying to explain this stuff. They totally ignore that God Himself was the one who created this all.

Hace 2 días
Jeff Allen
Jeff Allen

@Pat Hill LMAO! I love triggering you Atheist... it's so damn easy.

Hace un día
Pat Hill
Pat Hill

Jeff Allen keep telling yourself that champ

Hace 2 días
Justin Kuemmerle
Justin Kuemmerle

I want Twister Theory.

Hace 2 días
Jamie Lancaster
Jamie Lancaster

Sounds like a whole lot of people were dropping LSD to come up with some these theories

Hace 2 días
Chunchunmaru
Chunchunmaru

Isnt anything north of the north pole south?

Hace 2 días
Fernando Sanchez
Fernando Sanchez

9:34 that kinda reminds me to the Riemann Z function which is another I don't understand but that have seen long ass videos about

Hace 2 días
Stefan S
Stefan S

Funny how science can be "beautifull" so much so we watch it without understanding most of it.

Hace 2 días
rpbsjy
rpbsjy

That NASA animation at 0:55 has the Big Bang spitting out fully formed galaxies, yet Matt included it in the video. No wonder we are confused...

Hace 2 días
The Jim Reaper™
The Jim Reaper™

I still can't get my head around the fact that the Universe is only 3 times older than the Earth... And that 13.8 billion years is nothing in the eons that the universe will carry on for were basically still in universe infancy!!!

Hace 2 días
Aural Essex
Aural Essex

No

Hace 2 días
robert harvey
robert harvey

Those that say there cannot be time before the singularity do not conceive how a black hole is created. If a black hole is a singularity, then we know there was time before the singularity as in the collapse of a star to create the black hole and a singularity. To try to say there was no time before the Big Bang is a misnomer.

Hace 4 días
David Lucas
David Lucas

this one video answered many questions.

Hace 4 días
David Lucas
David Lucas

​@Ryan Rauber i get it. in real life your a flake. a few drinks and mr 1 inch man becomes a keyboard warrior.

Hace 2 días
Ryan Rauber
Ryan Rauber

Also, I'm drunk sooo........

Hace 2 días
Ryan Rauber
Ryan Rauber

You're mom answered many questions last night when she was s'n my D. Boom!!!!!!!!

Hace 2 días
Stefano Portoghesi
Stefano Portoghesi

How do we know that the Universe began 13.8 billions years ago ? Surely that measurement of earthly "Time" may be valid for our human sphere of reality only but what about universal "Time" , one individual's past event in "time" may be another individual' future event in "time" .

Hace 5 días
Alex Bordon
Alex Bordon

I have a new gravity, time and consciousness theory that connects quantum mechanics, black holes, dark energy and gravity with existence and a universal balance, what should I do?

Hace 6 días
Alex Bordon
Alex Bordon

Any tips?

Hace 6 días
420drwilldo
420drwilldo

If your really think about it what is time but the observation of the Decay rate of the universe so of theyer is nothing to decay then there is nothing to observe decaying

Hace 6 días
Daniel Baenziger
Daniel Baenziger

I think Carl would have really enjoyed these videos. Many thanks to Matt and his team for taking part of his mantle. Cheers.

Hace 6 días
Spiritual Braces
Spiritual Braces

i always wondered if our universe was just some black hole in another universe...

Hace 6 días
Chris Howe
Chris Howe

Was there a video that tackled the idea of Tachyons during expansion? My best guess. No. The density of the universe at the Singularity would create a difference in 'c' similar to what we see around a black hole. However, relativity brings us to a screeching halt there since it's from our perspective that 'c' is changing at all. Would this all come together to indicate that a sationary observer during expansion would in-fact have witnessed tachyon-level information transmission? Wouldn't this also mean that 'c' is relative to the observer and thus tachyons would be possible only from a certain perspective? Example: 2 starships travel conventionally at 0.75c towards eachother. The observer on starship a would witness starship b approaching at >c. viola! Tachyons??? This would also mean a new c is in order where 2c is "true" constant???

Hace 6 días
Elias
Elias

watching this sort of stuff feels a bit like getting my brain spanked

Hace 7 días
Lelouch Yagami
Lelouch Yagami

We can say 1 day before big bang...

Hace 7 días
Steve Openshaw
Steve Openshaw

I am an atheist, but listening to how convoluted all these different creation theories are, it makes me think that it may well just be simpler to buy that some old dude with a beard did it.

Hace 7 días
Dave Anand
Dave Anand

We only speak of one directional time in the positive direction - What about NEGATIVE Time Axis ???

Hace 7 días
Back to Seattle
Back to Seattle

Entropy wouldn't be to happy about it

Hace 6 días
robert charlton
robert charlton

time and space are very complicated, take for example, that we can travel at the speed of light and there are twins, that are astronaughts, 1 of them stays on earth and the other goes on a trip to jupiter at the speed of light, when he comes back, the twin that stayed on earth would be older than the twin that went to jupiter.

Hace 8 días
Simon Coles
Simon Coles

I'm a bit fan of the Penrose CCC theory

Hace 8 días
Amzar Nacht
Amzar Nacht

*heh* Time pre-dated the 'big bang' - but there was no way to measure it as the required atomic vibrations were at a standstill. Nothing got within a thousand light years without being sucked in... Once the trigger initiated, time could then be measured by the vibration of energetic particles that formed soon after. Time as *WE* know it - you know, these bone-encased gray blobs of neurons that have existed for about one billionth of a second on the 'year clock' of the life of the universe (as in, one billionth of a second from midnight, december 31st on that calendar) - is something only *WE* conceived and chose to call 'time', so what time was prior to the creation of our small corner of the greater macroverse well... it had already been defined by others. Perhaps others advanced enough to even manipulate or travel along it *then*

Hace 8 días
chrisgotagun time
chrisgotagun time

God is the big bang theory

Hace 8 días
Faris
Faris

Is anyone else triggered about the way he wears his shirt?

Hace 8 días
Prestia2011
Prestia2011

Why cause it's lower on one shoulder? Maybe he's got uneven upper body

Hace 5 días
Viker
Viker

Im watching this video trying to expand my knowledge and get smarter and cause i like space but god why am i so stupid that i dont understand almost a single thing

Hace 8 días
james caley
james caley

Never trust anything with a singularity.

Hace 8 días
M Johnson
M Johnson

It seems like the Universe once expanded to a point of thermal equilibrium is the same as the universe before the big band at thermal equilibrium. What about a Bose–Einstein condensate could it be state of matter at the point before the big bang at the end of that expansion?

Hace 9 días
56pjr
56pjr

"In the beginning, God created the Heavens and the Earth" (Genesis 1:1).

Hace 9 días
Tymen Timmer
Tymen Timmer

One thing that bothers me is the whole t=0 or t=something for that matter. How do you know what time we live in? And what happens from t=-1?

Hace 9 días
Games Creator
Games Creator

Thanks for exploding my brain...

Hace 9 días
Deipatrous
Deipatrous

Your maths is shaky. Which is a pity because this channel is better than most.

Hace 10 días
djchristian82
djchristian82

Yea show your mathematical skills.

Hace 9 días
Traian
Traian

So, with a Planck time as the smallest unit of time and a Planck length as the smallest unit of distance, why is it mathematically such a problem? instead of infinitely divisible 0.something why not make 1 the smallest number possible (1 as in the singularity) and abolish fractions. (one is the smallest number, the next smallest is 2 ...) shouldn't the math solve itself after that? you get as far as you can get as long as you have space time, and before that it doesn't matter because without space time you can't define it. In fact if you want to go back the universe's beginning 2 is the farthest you can go because that's the actual first second and the first measurable size between 2 points (you need 2 at least points to measure a distance or an interval of time. P.S. -for you physicists out there: how is gravity warping space-time ? is the Planck unit of distance changing or what?

Hace 10 días
Stan TheObserver
Stan TheObserver

If the Universe was all at one point...then how could it be infinite? Also,dark energy was not all it was at the big bang as it grows as it still perculates out of nothing. Something's missing.

Hace 10 días
Stan TheObserver
Stan TheObserver

@djchristian82 They are certain that by any other name a force is expanding the universe. It's everything after that they can't say for certain. Dark Matter on the other hand might just be regular matter,just in microscopic bits and invisible clouds of it. Or not.

Hace 7 días
djchristian82
djchristian82

Dark energy is nothing proven just a hypothesis.

Hace 9 días
Lord Pyrex
Lord Pyrex

Black holes consume all matter over time and eventually each other and eventually only one exists and eventually even that is taken back to a single point which then erupts back out into a new big bang.

Hace 10 días
Luigi Cantoviani
Luigi Cantoviani

Inflation is not a matter fact event.

Hace 10 días
Roboprogs
Roboprogs

Yeah inflation theory makes me cringe, too. Any observations of an inflation, or a falsifiable test? My theory is that the universe started are as something about the size of a lumpy beach ball 🤡 (But I don’t know how to test it, so it’s probably crap even more so) As Opus the Penguin said “Well, why not?!?”

Hace 9 días
Theo0x89
Theo0x89

6:34 _"we trace a path called a geodesic, which in general relativity is the shortest path between two space-time coordinates"_ More like the "straightest" path between two points in space-time. Typically it is the longest path, measured in proper time, which is the measure of length in space time. Also, "between two space-time coordinates" is an awkward formulation. There is no need to refer to coordinates, and the two endpoints of the path would correspond to two sets of four coordinates with respect to some coordinate system.

Hace 10 días
neil u
neil u

ok, but what size would a black hole be thats the mass of the universe? how could the big bang have started smaller than that? does information theory put a minimum size for the whole universes information to be stored on the surface a universe mass black hole? thanks

Hace 10 días
Enki Son Of Anu
Enki Son Of Anu

Not weird enough

Hace 11 días
Hecka Nice
Hecka Nice

No. Time starts with a point of consciousness

Hace 11 días
Ive_y 79
Ive_y 79

I watche this then I died

Hace 12 días
Apollo Stone
Apollo Stone

No one really knows how the universe started but mainly theories are the only thing to talk about. Again, we know nothing, yet we always explore somwthing.

Hace 12 días
Jari Haukilahti
Jari Haukilahti

Maybe time started big bang.

Hace 12 días
memo redspectrum
memo redspectrum

planc length has some idea

Hace 12 días
Akshay Kalghatgi
Akshay Kalghatgi

Has anyone ever considered the possibility that the Big Bang might have been a White Hole.

Hace 13 días
Vincent Smith
Vincent Smith

He kind of said that that was a possibility in different words

Hace 11 días
Dominic A
Dominic A

It’s magic !,no other explanation.

Hace 13 días
ZERO3690
ZERO3690

I see.. Big Bang is not a theory any more, it is a fact and so we are now focused on other things to solve

Hace 13 días
quidam
quidam

Hey, great thanks from France !!! I was wondering if you'd talk about the BGV theorem some day as it seems to have a connection with beginnings ? I've heard about it but can't grasp the implications and on what assumptions it rests... Anyways, big big fan of yours !!!

Hace 14 días
Andrew Pope
Andrew Pope

I greatly appreciate this honest attempt at explaining this stuff however I am absolutely none-the-wiser

Hace 14 días
Underscore Pete
Underscore Pete

Is it possible that 3 of our universal forces already existed at the proposed time of the big bang and gravity then occurred for the first time in our universe? Can a universe exist without gravity?

Hace 14 días
Ajit Jha
Ajit Jha

I am inclined towards Holographic Universe. The space itself is a projection, where as the so called reality is somewhere else.

Hace 14 días
PistolPunch
PistolPunch

What if black holes singularity after vapourizing somehow creates an explosion which causes space to expand and creates new materials. Like dividing by 0. It would create and endlesss cycle of new universes everywhere.

Hace 14 días
Martin L
Martin L

Odd place to put this. I'm an evolutionary biologist, so am prone to be a Smolin fan boy. But this is something different, that all PBS channels have in common. I'm British and am totally sick to the teeth by the very American obsession with religion vs science. You don't really get it in the UK. To be honest, I am just SO cheesed off that everytime I look at something interesting, videos, below the video I'm watching, nearly always carry at least some videos by people who are either crazy, or have no idea what a theory means, and why science must always be agnostic, about everything. Sorry to have a rant. I'm just fed up with this unending war between OCD anti religion, and plain stupid anti science. Drives me nuts. So hooray for PBS, Crash Course etc. I am seriously in love with PBS. If you carry on, you might even get as good as the BBC. HA!

Hace 15 días
Systematic Error
Systematic Error

ALLAH is the GREATEST. https://www.youtube.com/watch?v=PyCezBD-5EQ

Hace 15 días
Deborah Mahon
Deborah Mahon

Our God is an awesome God.

Hace 15 días
The Werewolf
The Werewolf

Sure. but what about Galactus?

Hace 15 días
Kyle Buchanan
Kyle Buchanan

you have explained exactly nothing, cmon start making some meaningful videos please guys

Hace 15 días
penguins forall
penguins forall

Big bANG rewind 0000

Hace 15 días
WolfgangLMclain
WolfgangLMclain

Something just occured to me, the weight of the universe at its earliest point must have been ENORMOUS, what did that mean for the spacetime curve of the universe?

Hace 15 días
LouSaydus
LouSaydus

You should ask your mother, her rear is of similar density/mass.

Hace 14 días
WolfgangLMclain
WolfgangLMclain

*notices* *reaches into video to tug your shirt into place*

Hace 15 días
Kirk-Da Rooster Gordon
Kirk-Da Rooster Gordon

Science tells us you can't create something from nothing okay so what created the singularity that started the big bang?

Hace 16 días
Romel Abou-Akl
Romel Abou-Akl

Our laws of science break down at a certain time interval after the big bang, commonly associated with the plank length. I do not have an answer for you, and nobody can answer it because nobody has a good answer to that. Some people have formulated mathematical explanations of how it could have came from "nothing", but there definition of "nothing" can be considered to actual contain something. Also if time does not exist before the Big Bang occurred it actually does not make much sense to ask what happened before it, or what created it since that is a human wording of events that are in a sense timeless. It is hard for us to think of something as timeless. Of course if it stems from another multiverse/bubble universe, etc you can still trace it back to the initial moment in that time frame. Some propose a creator, as there are some logical arguments such as the Leibniz's cosmological argument and many others that attempt to show why there must be one. This is a field of fascinating advancements, logic, physics, mathematics and in some senses even spirituality as we seek where the atoms that make up our consciousness and everything around us stem from. Good luck on your journey for knowledge.

Hace 15 días
Ulfat Dawood
Ulfat Dawood

Doesn't the Big Bang Theory violate the "Law of Conservation of Mass" ??

Hace 16 días
Theo0x89
Theo0x89

Conservation of mass hasn't been at thing since Einstein discovered that mass is a form of energy. What you mean is conservation of energy, for which you would need a general definition of energy, which doesn't seem to exist in general relativity. But that's beside the point of your question, I guess, because you seem to think that the energy content of the universe somehow changed at the Big Bang. The Big Bang Theory doesn't say anything like that. It only says that the energy density used to be very high at some point in the past from which the universe went on to expand.

Hace 10 días
Brian Cananzey
Brian Cananzey

what if the universe does have a cyclical big bounce and each time it bounces it grows bigger than the last bounce. eventually if exceeds its ability to crunch any longer and after its last bounce it expands forever. We are in that expansion? Hmmm? Like a ball bouncing every time going higher and higher till it leaves the surface of the earth? ....excuse my while I hit this joint again!

Hace 16 días
Harry H
Harry H

Alien in another universe made our universe, their universe was in turn made the same way, ad inf, different universe different laws

Hace 16 días
A Tothetop
A Tothetop

Every Christian who appeals to the Big Bang theory from a causality perspective needs to see this!

Hace 16 días
Subodh Khandekar
Subodh Khandekar

At 5:22 ... It's not 3 dimensional... It's 4 dimensional space !!!

Hace 17 días
Lucid D
Lucid D

The big bang is like the mitochondrial eve in genetic, just a logical response from a bad question or attitude. Same with the chicken or the egg? question. They are just bias rooted in our social understanding and psychology. There is no mitochondrial eve that ever existed and both the egg and the chicken are phases in evolution, both cell forms and bodies evolved together to produce one or the other.

Hace 17 días
tenaciousvalor
tenaciousvalor

BLACK HOLES CREATE BIG BANGS.

Hace 17 días

A continuación

The Quantum Internet

15:20

The Quantum Internet

PBS Space Time

Vistas 394 360

Space - Just Blue (1978)

3:37

Space - Just Blue (1978)

yalita76

Vistas 4 109 214

Space - Magic Fly Music Video

3:14

Space - Magic Fly Music Video

tirktv

Vistas 4 095 146

Chris Broussard reacts to reports Lakers have interest in Dwight Howard | NBA | FIRST THINGS FIRST

6:36

Taylor Swift - Blank Space

4:33

Taylor Swift - Blank Space

TaylorSwiftVEVO

Vistas 2 483 357 115

Space - Running In The City 1977 HQ

4:18

Space - Running In The City 1977 HQ

NoMadU55555

Vistas 725 911

Jean-Michel Jarre - Magnetic Fields 2 1981

3:53

Jean Michel Jarre - Oxygen II

7:53

Jean Michel Jarre - Oxygen II

Zeljko Mojsilovic

Vistas 5 979 327

Earth Views: Earth From Space Seen From The ISS

0:00

Space Of Variations - TIBET (Official Music Video)

4:04

Logic - No Pressure Freestyle

3:22

Logic - No Pressure Freestyle

BobbysWorld

Vistas 982 955

UFC 241: Nate Diaz vs Anthony Pettis Recap

5:16

We Bought 10 Products On Wish for ONLY $1!

24:00

We Bought 10 Products On Wish for ONLY $1!

DOPE or NOPE

Vistas 1 811 363