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(News.com.au)   Renowned physicist Stephen Hawking has been thinking about early times again, says time did not begin with the Big Bang...just that we've been driving on the wrong side of the road this whole time   ( news.com.au) divider line
    More: Interesting, General relativity, Big Bang, Universe, Physics, time, Quantum mechanics, Gravitational singularity, Physical cosmology  
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2828 clicks; posted to Geek » on 04 Mar 2018 at 2:13 PM (32 weeks ago)   |   Favorite    |   share:  Share on Twitter share via Email Share on Facebook   more»



39 Comments     (+0 »)
 
View Voting Results: Smartest and Funniest
 
2018-03-04 12:40:42 PM  
Just before the big bang, there was a voice from the heavens saying, "Umm, you guys might want to get out of the way"...
 
2018-03-04 01:28:46 PM  
Oddly enough, that makes me think of Early Times, too

/Neat
 
2018-03-04 01:37:41 PM  
We're just lucky the NHS didn't kill him.

USA! USA! USA!
 
2018-03-04 01:38:34 PM  

MaudlinMutantMollusk: Oddly enough, that makes me think of Early Times, too

/Neat


Cheers!

*clink*
 
2018-03-04 01:51:34 PM  
Did he just lay out the theory behind the Infinite Improbability Drive?
 
2018-03-04 02:30:19 PM  
I thought physicists had believed this for a while, that the Big Bang occurred at some moment in time, but the little kernel of compressed matter that started it had existed for an unknown amount of time before the Big Bang, and possibly was left over from a previous Big Bang, which resulted in contraction and collapse. This cycle could have repeated an infinite number of times.

In other words - this is news?
 
2018-03-04 02:37:29 PM  
The fight - Red Dwarf - BBC comedy
Youtube EahHThBjDB0


/Oblig
 
2018-03-04 02:41:56 PM  
You can tell Stephen Hawking is British, because his driving controls are on the right side.
 
2018-03-04 02:50:36 PM  

simplicimus: Did he just lay out the theory behind the Infinite Improbability Drive?


Probably.
 
2018-03-04 02:55:26 PM  

ImpendingCynic: I thought physicists had believed this for a while, that the Big Bang occurred at some moment in time, but the little kernel of compressed matter that started it had existed for an unknown amount of time before the Big Bang, and possibly was left over from a previous Big Bang, which resulted in contraction and collapse. This cycle could have repeated an infinite number of times.

In other words - this is news?


Repeat
 
2018-03-04 02:58:18 PM  

MaudlinMutantMollusk: ImpendingCynic: I thought physicists had believed this for a while, that the Big Bang occurred at some moment in time, but the little kernel of compressed matter that started it had existed for an unknown amount of time before the Big Bang, and possibly was left over from a previous Big Bang, which resulted in contraction and collapse. This cycle could have repeated an infinite number of times.

In other words - this is news?

Repeat


Ad infinitum
 
2018-03-04 03:03:13 PM  

bigfatbuddhist: Just before the big bang, there was a voice from the heavens saying, "Umm, you guys might want to get out of the way"...


I thought it was "Hold my beer and watch this!"
 
2018-03-04 03:04:13 PM  

bigfatbuddhist: Just before the big bang, there was a voice from the heavens saying, "Umm, you guys might want to get out of the way"...


I thought the voice said: "Hold my beer."
 
2018-03-04 03:04:39 PM  

batlock666: bigfatbuddhist: Just before the big bang, there was a voice from the heavens saying, "Umm, you guys might want to get out of the way"...

I thought it was "Hold my beer and watch this!"


Damnit!
 
2018-03-04 03:13:04 PM  

bigfatbuddhist: Just before the big bang, there was a voice from the heavens saying, "Umm, you guys might want to get out of the way"...


So the universe is god's shart?
 
2018-03-04 03:14:52 PM  
All I know is its been considered a bad move
 
2018-03-04 03:20:01 PM  
Before the Big Bang 5: The No Boundary Proposal
Youtube Ry_pILPr7B8


(This whole series of 'Before the Big Bang' is actually pretty nice, if you have the time.)
 
2018-03-04 03:26:44 PM  

ImpendingCynic: I thought physicists had believed this for a while, that the Big Bang occurred at some moment in time, but the little kernel of compressed matter that started it had existed for an unknown amount of time before the Big Bang, and possibly was left over from a previous Big Bang, which resulted in contraction and collapse. This cycle could have repeated an infinite number of times.

In other words - this is news?


"There is a theory which states that if ever anyone discovers exactly what the Universe is for and why it is here, it will instantly disappear and be replaced by something even more bizarre and inexplicable. 

There is another theory which states that this has already happened."
 
2018-03-04 03:32:08 PM  
"A voice said: One. One. One, two. One, two. Then the footsteps went back into the distance. After a while, another voice said: One, two, three, four- And the universe came into being. It was wrong to call it a big bang. That would just be noise, and all that noise could create is more noise and a cosmos full of random particles. Matter exploded into being, apparently as chaos, but in fact as a chord. The ultimate power chord. Everything, all together, streaming out in one huge rush that contained within itself, like reverse fossils, everything that it was going to be. And, zigzagging through the expanding cloud, alive, that first wild live music. This had shape. It had spin. It had rhythm. It had a beat, and you could dance to it. Everything did."
Terry Pratchett, Soul Music
 
2018-03-04 03:33:20 PM  
encrypted-tbn0.gstatic.comView Full Size
 
2018-03-04 03:34:58 PM  

tjsands1118: You can tell Stephen Hawking is British, because his driving controls are on the right side.


I'm American and all of my cars have the driving controls on my right side...

/except for the turn signal of course
/and not the ignition key, because I do not have a Porsche
 
2018-03-04 04:13:40 PM  

fat boy: [encrypted-tbn0.gstatic.com image 183x275]


If Stephen Hawking goes on three-day session, does he start speaking perfect English?
 
2018-03-04 04:47:30 PM  

batlock666: bigfatbuddhist: Just before the big bang, there was a voice from the heavens saying, "Umm, you guys might want to get out of the way"...

I thought it was "Hold my beer and watch this!"


I would have gone with either:

"Pull my finger."

or

"I can't see a damn thing in here."
 
2018-03-04 04:49:11 PM  

ImpendingCynic: I thought physicists had believed this for a while, that the Big Bang occurred at some moment in time, but the little kernel of compressed matter that started it had existed for an unknown amount of time before the Big Bang, and possibly was left over from a previous Big Bang, which resulted in contraction and collapse. This cycle could have repeated an infinite number of times.


This thought kept me awake as a child. What came before the Big Bang? Where did the material for the BB come from?  And my favourite: if the universe is expanding, what is it expanding into?  Douglas Adams gave a partial answer, but alas, my curiosity remains.
 
2018-03-04 04:50:10 PM  

Eravior: batlock666: bigfatbuddhist: Just before the big bang, there was a voice from the heavens saying, "Umm, you guys might want to get out of the way"...

I thought it was "Hold my beer and watch this!"

I would have gone with either:

"Pull my finger."

or

"I can't see a damn thing in here."


Or

What does this button do?
 
2018-03-04 05:31:59 PM  

bigfatbuddhist: Just before the big bang, there was a voice from the heavens saying, "Umm, you guys might want to get out of the way"...

HERE. HOLD MY MEAD.
 
2018-03-04 05:33:22 PM  
I'm still not comfortable with the idea of a second time dimension, which is what Hawking seems to be implying by his "virtual time" - time as a complex number? sounds like 2-d time to me.

Or something more than time at least. Time being the virtual ordering of things from one state to another, proceeding along another dimension in it means what? Any more or no change to the rate of entropy that measures it in our senses/? Does quantum interaction travel along it both ways, back in time for the purpose of making sure entangled quantum states far apart become fixed when one ins measured, instantly in "our" time?

A state of tie becoming ever smaller and smaller along another dimension in a pre-Big Bang universe sounds a lot like a contracting pulsating universe's last gasp, getting smaller and smaller, gravity curving time more and more while something with a finite mass/energy moved towards infinitely small and hitting a  limit, or maybe just until it couldn't contain all the quantum information of the universe encoded in it any more, that is supposed to be taboo.
 
2018-03-04 07:28:04 PM  

Nick Nostril: Eravior: batlock666: bigfatbuddhist: Just before the big bang, there was a voice from the heavens saying, "Umm, you guys might want to get out of the way"...

I thought it was "Hold my beer and watch this!"

I would have gone with either:

"Pull my finger."

or

"I can't see a damn thing in here."

Or

What does this button do?


*click*
"Huh!"
The others drew away. They had heard this before.
"Jehovah! You idiot!"
"Dammit, there's firmament all over the damned place."
"Wait, are those future mortals?"
"For chrissake man, it's farking infested."
"Hah, I'll bet they aren't stupid enough to push a button like that!"
"Really? How much?"
"Ten golden apples. Hey Odin, hold these apples. If they push the button then snake boy gets them."
"You're betting Lucifer on something? You are a sucker. OK, I'll hold 'em"
"Great. Be right back."
"Wait, he can't do that. Jehovah, tell Lucifer to stop playing around with your mortals."
"No can do, I owe him from last month. Sorry."
"Dammit!"
 
2018-03-04 07:52:40 PM  

SwiftFox: I'm still not comfortable with the idea of a second time dimension, which is what Hawking seems to be implying by his "virtual time" - time as a complex number? sounds like 2-d time to me.

Or something more than time at least. Time being the virtual ordering of things from one state to another, proceeding along another dimension in it means what? Any more or no change to the rate of entropy that measures it in our senses/? Does quantum interaction travel along it both ways, back in time for the purpose of making sure entangled quantum states far apart become fixed when one ins measured, instantly in "our" time?


I'm pretty sure I watched that anime.
 
2018-03-04 10:02:10 PM  

MaudlinMutantMollusk: Oddly enough, that makes me think of Early Times, too

/Neat


img.fark.netView Full Size
 
2018-03-04 10:15:38 PM  
Are you sure it isn't just . . .  Adventure Time?
 
2018-03-05 01:12:42 AM  
"Alone of all the creatures in the world, trolls believe that all living things go through Time backward. If the past is visible and the future is hidden, they say, then it means you must be facing the wrong way. Everything alive is going through life back to front."
- Terry Pratchett, Reaper Man
 
2018-03-05 02:04:08 AM  

karl2025: "Alone of all the creatures in the world, trolls believe that all living things go through Time backward. If the past is visible and the future is hidden, they say, then it means you must be facing the wrong way. Everything alive is going through life back to front."
- Terry Pratchett, Reaper Man


Damn, I miss that guy.
 
2018-03-05 02:11:39 AM  

SwiftFox: I'm still not comfortable with the idea of a second time dimension, which is what Hawking seems to be implying by his "virtual time" - time as a complex number? sounds like 2-d time to me.

Or something more than time at least. Time being the virtual ordering of things from one state to another, proceeding along another dimension in it means what? Any more or no change to the rate of entropy that measures it in our senses/? Does quantum interaction travel along it both ways, back in time for the purpose of making sure entangled quantum states far apart become fixed when one ins measured, instantly in "our" time?

A state of tie becoming ever smaller and smaller along another dimension in a pre-Big Bang universe sounds a lot like a contracting pulsating universe's last gasp, getting smaller and smaller, gravity curving time more and more while something with a finite mass/energy moved towards infinitely small and hitting a  limit, or maybe just until it couldn't contain all the quantum information of the universe encoded in it any more, that is supposed to be taboo.


It is my layperson's recollection that modern physics is now shying away from the concept of Imaginary Time.  However, Hawking is a big proponent of it still.
 
2018-03-05 03:51:42 AM  
If the universes rate of expansion is increasing, does that mean time is accelerating as well?
 
2018-03-05 04:01:02 AM  
In the beginning was the Creation of the Universe. This has made a lot of people angry, and has been widely regarded as a bad move.
 
2018-03-05 09:46:00 AM  

ImpendingCynic: I thought physicists had believed this for a while, that the Big Bang occurred at some moment in time, but the little kernel of compressed matter that started it had existed for an unknown amount of time before the Big Bang, and possibly was left over from a previous Big Bang, which resulted in contraction and collapse. This cycle could have repeated an infinite number of times.

In other words - this is news?


It's a bit more subtle than that.  This article did a fairly poor job of summarizing the conversation, and you can find half a dozen articles that directly contradict each other on what he was saying.  It's explained better in a few other articles:

https://www.mirror.co.uk/science/prof​e​ssor-stephen-hawking-says-knows-121286​13
https://www.sciencealert.com/stephen-​h​awking-explains-what-was-around-before​-the-big-bang

Overall, it's better to just listen to the interview in its entirety.

The issue we tend to have when talking about phrases like "before the big bang" is that our language fails us.  Living in our typically macroscopic world using language developed several thousand years ago, we have a tendency to think of time as a universal tick-tick-tick in the background of the actions we perform.  It's a universal that is always there in how we view the universe, so it makes sense to ask a question like "what was before the big bang".

The shortest way to explain it with our current understanding of space and time is to say the question literally doesn't make sense.  The very concept of time does exist at a point "before" the big bang.  It's a discontinuity along the smooth line going backward to that point (remember your first few weeks of calculus limits).   It is completely undefined at that point, and at any point to the left of that point on the axis.  By definition, there is no definition of time in that area of the graph.

As an analogy, it's like talking about velocity in a universe consisting of only a single point.  Time, like velocity, is a relative measure.  Distance also works in this analogy.  How do you measure distance in a universe consisting only of a single point?  You can't.  How do you measure velocity in a universe with only a single point?  You can't.  It conceptually null, because you require multiple points for that idea to make sense.  Time is the same way.  Without continuous events spanning the dimension you're measuring on, there is no time.  A universe consisting of a singularity of a single point precludes time from being a meaningful concept.

It becomes easy for us to talk about multiple big bangs being cyclical events, because it fits into our "continuous time" assumption that our brains love to hold to.  The issue physicist have been struggling with is that continuous time isn't real, any more than a continuous spatial dimension is real.  Relativity throws that right out the window.  So we're stuck using insufficient language to articulate it, like asking what a female stallion looks like.
 
2018-03-05 11:35:08 AM  

bigfatbuddhist: Just before the big bang, there was a voice from the heavens saying, "Umm, you guys might want to get out of the way"...


It was documented...
vignette.wikia.nocookie.netView Full Size
 
2018-03-05 02:06:49 PM  

Grognard: Are you sure it isn't just . . .  Adventure Time?


It's time for Telletubbies
 
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