Did Time Start at the Big Bang?

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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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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
Varaktighet: 13:34

Kommentarer

SandBoy Null
SandBoy Null - Timme sedan
I’m gonna have a panic attack.
Paul Swensen
Paul Swensen - 7 timmar sedan
What is the music playing at the end of the episode and where can I get it?
Wilfred Torres
Wilfred Torres - Dag sedan
https://youtu.be/JiMqzN_YSXU    there was no big bang
Marlo H
Marlo H - 2 dagar sedan
THE UNIVERSE IS FLAT! NASA USES LAZER BEAMS TO MAKE IT LOOK ROUND!!
Life's truths
Life's truths - 2 dagar sedan
I was just given to know this. The Universe is not infinite because of the true nature of reality. Still it's potential is Infinite.
Steve Magruder
Steve Magruder - 2 dagar sedan
This is purely in the realm of hypothesis, but I imagine our universe is the result of the long death of another one. The inexplicable physics of that universe formed an unimaginably large black hole, and the beginning of ours started from the end of its gravity well (that infinitesimally small point). It had a gravity so intense it not only ate light, it ate a lot of its spacetime as well (since as we know, mass warps spacetime). Then, the Big Bang is kind of a cosmic "appendix bursting" of that black hole, again via inexplicable physics.
Chris Ziga
Chris Ziga - 2 dagar sedan
Nah time is always constant you can not control time or fast foward it
James Oconnor
James Oconnor - 3 dagar sedan
The year O = 0
"No matter" who ? https://youtu.be/0d5eP0wWLQY
Rell-J
Rell-J - 3 dagar sedan
Something came from nothing.
Which means that nothing is actually something. Now what is it? Humans don’t know, can’t know ,and won’t ever know.
With that being said the Big Bang just doesn’t haven’t without something already being present therefor time already existed obviously
necromancer
necromancer - 5 dagar sedan
I'm still not able to conclude whether time started with big bang or not.
lostbuffalo
lostbuffalo - 5 dagar sedan
Speed of light
We have a measured speed of light of approximately 186 thousand miles per second
We also have two other speeds of light you are not aware of.
They are beyond measure yet they have value
zero and the speed of now
All that exists at the moment of the big bang is light+space and the absolute void the singularity exists within.
The singularity at the big bang is light at speed zero, light does not move beyond the point of A
The point of B does not exist as a point
the ether is also a creation of the big bang.
An ether expanding within an absolute void
At the singularity were both light and space existing both within a single point and neither having any speed of movement
the energy of the light was contained by the impedance of space otherwise light would have moved at instantaneous speed across the void and nothing would exist...
All things being created from the interaction between space and light
The speed of light through space from point A to point B is 186k miles per second
The ultimate speed of light is now, it moves from point a to point b instantly
With three speeds for light 2 intuited and 1 observed, you can calculate the impedance of space on light.
knowing the impedance of space on light you can create new matter, consume matter for energy or extract energy from space itself.
You could even move between 2 points faster than the speed of light.
Unfortunately you cannot time travel because time does not actually exist
lostbuffalo
lostbuffalo - 5 dagar sedan
Infinity is a word that means not measurable, or beyond measure.
it is also used to say something is without value or beyond having a value
to measure something you need to correlate it with something you know, like how you hold a ruler to line to measure the line.
singularity is infinite in there not being a way to measure it
But it is not infinite in the sense of having value
Singularity is a value in itself just as zero has value on a number line.
lostbuffalo
lostbuffalo - 5 dagar sedan
Time is merely a mental construct the mind employs to differentiate between memory (past) experience (present) and intuition (future)
There is no evidence that time exists as a force of nature
Your mental construct is correlated with the world outside your mind creating the illusion of time.
Modelling change, or cause and effect moving through time is a useful way of organizing your observations but it is an illusory mental crutch.
cause and effect or change do not actually move through time
your perception of change moves through your concept of time within your mind
Time does not actually exist.
The scientific error here is a rational inability to discern between reality and concept.
vince pie
vince pie - 6 dagar sedan
No, there were surely causal sequences of events before hand that resulted in the big bang, we just have no idea for sure what any of it was or could be.
Jack251190
Jack251190 - 6 dagar sedan
Time started when matter or rather energy came into existence. Why? Think about how we measure time. It is the change of state or location of matter. Without matter, time means nothing.
Buttmaster Flex 69
Buttmaster Flex 69 - 7 dagar sedan
gourd mad duh univarse n duh urf iz flatt, stoopid afiests
Mark R
Mark R - 9 dagar sedan
how do you measure and track a point in space in time? like, how can you compare the distance of two points in this moment and then the next moment? what even is a point? a quark? or the 'fabric' that the quark exists on? if comparison requires delineation, what is being compared?
Timothy Truitt
Timothy Truitt - 9 dagar sedan
"In the beginning.... God".
Kevin Castillo
Kevin Castillo - 9 dagar sedan
COPENHAGEN INTERPRETATION PROPER. I HAVE BECOME.
Kevin Castillo
Kevin Castillo - 9 dagar sedan
THE MORE INFORMATION I INTAKE, THE MORE IDEAS I FIND FROM THE PAST TO BE CORRECT WITHOUT A DOUBT.
Kevin Castillo
Kevin Castillo - 9 dagar sedan
ITS DO TO THE UNCOMFORTABLE TRUTH THAT NEEDS TO BE ACCEPTED. ALL OF YOUR PRESENTED QUESTIONS AND IDEAS ARE BOTH CORRECT AND THEN INCORRECT. EINSTEIN HAS NEVER BEEN INCORRECT, JUST NOT ENTIRELY UNDERSTOOD. STRING THEORY IS ALSO ONTO SOMETHING. *HUGH EVERETT*!!! CORRECT. REALISM PHYSICS CORRECT. LOCALITY COMPLETE. ASPECT, DALIBARD & ROGER ARE CORRECT. I AM PROOF. DISCOVER WHAT I HAVE BECOME.
ccall48
ccall48 - 9 dagar sedan
Does time really exist if you're not mortal?
NoShaleGastly
NoShaleGastly - 11 dagar sedan
The background noise in this was annoying as fuuck
LaTerry Dorsey
LaTerry Dorsey - 12 dagar sedan
Would the Big Bang be equivalent to the first time a sentient mind forms a thought? Could the " Speed" of said thought be somewhat equivalent to the speed of light? Quantum mechanics says Thought creates matter, correct?
ONNIE TALONE
ONNIE TALONE - 12 dagar sedan
wow a PBS video one can comment on, about time? time is so hard to understand, as did not begin, so has no end but has no middle, so what time is it, simple question, cannot be answered when asked about something that does not exist, Bend time, ripple time, but how can time have no real value in the Universe!
A Tothetop
A Tothetop - 12 dagar sedan
Gawd didit
waterborne
waterborne - 13 dagar sedan
Spacetime is just an emergent construct from quantum fields. As such time as we know it is not fundamental and is just an emergent property from the energy and information that forms the quantum fields.
neil u
neil u - 13 dagar sedan
Very cool episode. M-Theory, 2 branes clapping together seems sensible. No?
PushandillPushback
PushandillPushback - 14 dagar sedan
Hard for time to start at an event that never happened.
Zeyad Hany
Zeyad Hany - 14 dagar sedan
I do believe that time only exists when there is mass identify it's existence.
karolina ktoś
karolina ktoś - 14 dagar sedan
If the universe is expanding are there galaxies that we used to see but we can't anymore?
Stephen Hill
Stephen Hill - 14 dagar sedan
Ah. Another video from PBS that I hoped I would understand but didn't.
If the universe wasn't created out of a singularity then how was it created? He said he would explain but I didn't notice\understand the explanation. I'll have a beer and forget about it until the next time.
Mangekyo3000
Mangekyo3000 - 14 dagar sedan
The song at the end activated my fight or flight
Patryk Budzyński
Patryk Budzyński - 13 dagar sedan
what is the title of this song?
cosmos and physical laws
cosmos and physical laws - 15 dagar sedan
engineering-and-science.com/general-theory-of-relativity.html
Strumptavian Roboclick
Strumptavian Roboclick - 15 dagar sedan
man I've been watching pBs spacetime for a while, I've come to a conclusion.. they just use different words to say the same thing over and over...
also I'd like to point out that's it's not a humans innate ability to see causality, it's the universe's own need for causation that we've picked up..
Steve Magruder
Steve Magruder - 2 dagar sedan
Well, we are children of the universe, so we're caught up in how it works. We are a part of which we describe.
Strumptavian Roboclick
Strumptavian Roboclick - 8 dagar sedan
@Read Marx do you actually believe that? or are you joking around.. there are good arguments for both sides of the debate.. myself I do think it is a lie..
Read Marx
Read Marx - 8 dagar sedan
Free will is a lie
Rotor Blade
Rotor Blade - 15 dagar sedan
When we compress the space into a single point we imagine that point as a point in space, but remember that point is what is left of space itself
Paavo Bergmann
Paavo Bergmann - 8 dagar sedan
thx. Now my brain just melted.
stewart quark
stewart quark - 15 dagar sedan
I still don't understand why so many feel that time exists as an entity unto itself, or, as a "thing" as opposed to what it actually is
Dean Meadows
Dean Meadows - 15 dagar sedan
The universe is definitely not infinite.
Nathan Sharp
Nathan Sharp - 15 dagar sedan
The geodesic point could just be a node that converges with an inverse geodesic. Time might look more like an hourglass than a single sided plume. Maybe its repeating like a double helix. Maybe the universe is a big guitar, and when one chord rings out, God just strums out another one.
Karl Will
Karl Will - 16 dagar sedan
What.....
Nästa