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Topic Starter Topic: Ok, all you astrophysicists...

Digital Nausea
Digital Nausea

Joined: 10 Feb 2001
Posts: 20078
PostPosted: 03-20-2012 07:37 AM           Profile   Send private message  E-mail  Edit post Reply with quote


I can't quite grasp the concept of looking at galaxies and other objects which are at the beginning of their life after the big bang.  So these objects are closer than we are to the origin of the big bang?  How would we be father away and yet not as old as these objects?  It would make sense to me, the farther away from the location of the big bang, the older you would be.  Could you clear this up?




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What I feed my kids
What I feed my kids

Joined: 02 Mar 2007
Posts: 14414
PostPosted: 03-20-2012 07:39 AM           Profile Send private message  E-mail  Edit post Reply with quote


lol...




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What I feed my kids
What I feed my kids

Joined: 02 Mar 2007
Posts: 14414
PostPosted: 03-20-2012 07:41 AM           Profile Send private message  E-mail  Edit post Reply with quote


Image




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foolproof
foolproof

Joined: 11 Jan 2001
Posts: 7919
PostPosted: 03-20-2012 07:43 AM           Profile Send private message  E-mail  Edit post Reply with quote


Image




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Lead Pipe Mafia
Lead Pipe Mafia

Joined: 15 Oct 2007
Posts: 3072
PostPosted: 03-20-2012 07:43 AM           Profile   Send private message  E-mail  Edit post Reply with quote


xer0s wrote:
I can't quite grasp the concept of looking at galaxies and other objects which are at the beginning of their life after the big bang.  So these objects are closer than we are to the origin of the big bang?  How would we be father away and yet not as old as these objects?  It would make sense to me, the farther away from the location of the big bang, the older you would be.  Could you clear this up?



Light travels from point a to point b. What you see is light. If light takes x number of years to travel from point a to point b then people on point b are seeing what happened x years ago.




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Digital Nausea
Digital Nausea

Joined: 10 Feb 2001
Posts: 20078
PostPosted: 03-20-2012 07:44 AM           Profile   Send private message  E-mail  Edit post Reply with quote


lol, I actually tried to ask Neil this question during his last AMA on reddit. But it's impossible to get past the other hundreds of questions for him...




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I'm the dude!
I'm the dude!

Joined: 04 Feb 2002
Posts: 11301
PostPosted: 03-20-2012 07:46 AM           Profile Send private message  E-mail  Edit post Reply with quote


Galaxies, stars and planets weren't all formed at the same time after the Big Bang. It just marks the beginning of anything. Besides, you hardly have time to worry about these things seeing as how the LHC is going to create a black hole and kill us all anyway.

Neil would have facepalmed.



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Last edited by obsidian on 03-20-2012 07:46 AM, edited 1 time in total.

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Karot!
Karot!

Joined: 31 Jul 2001
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PostPosted: 03-20-2012 07:46 AM           Profile Send private message  E-mail  Edit post Reply with quote


Image



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What I feed my kids
What I feed my kids

Joined: 02 Mar 2007
Posts: 14414
PostPosted: 03-20-2012 07:46 AM           Profile Send private message  E-mail  Edit post Reply with quote


i see dumbos...EVERYWHERE!!!...




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foolproof
foolproof

Joined: 11 Jan 2001
Posts: 7919
PostPosted: 03-20-2012 07:47 AM           Profile Send private message  E-mail  Edit post Reply with quote


xer0s wrote:
lol, I actually tried to ask Neil this question during his last AMA on reddit.


LEAVE NEIL ALONE!!1 >:'-(




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Messatsu Ko Jy-ouu
Messatsu Ko Jy-ouu

Joined: 24 Nov 2000
Posts: 41097
PostPosted: 03-20-2012 07:49 AM           Profile   Send private message  E-mail  Edit post Reply with quote


obsidian wrote:
Galaxies, stars and planets weren't all formed at the same time after the Big Bang. It just marks the beginning of anything. Besides, you hardly have time to worry about these things seeing as how the LHC is going to create a black hole and kill us all anyway.

Neil would have facepalmed.

also, their mass influences the speed at which they travel through space. we could be younger but still have taken them over.




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Digital Nausea
Digital Nausea

Joined: 10 Feb 2001
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PostPosted: 03-20-2012 07:59 AM           Profile   Send private message  E-mail  Edit post Reply with quote


Κracus wrote:
xer0s wrote:
I can't quite grasp the concept of looking at galaxies and other objects which are at the beginning of their life after the big bang.  So these objects are closer than we are to the origin of the big bang?  How would we be father away and yet not as old as these objects?  It would make sense to me, the farther away from the location of the big bang, the older you would be.  Could you clear this up?



Light travels from point a to point b. What you see is light. If light takes x number of years to travel from point a to point b then people on point b are seeing what happened x years ago.


I've always understood that. I don't think you understand what I'm asking. I think obsidian gets it better...




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Tap, Nap, or Snap
Tap, Nap, or Snap

Joined: 01 Dec 2000
Posts: 27658
PostPosted: 03-20-2012 08:15 AM           Profile   Send private message  E-mail  Edit post Reply with quote


Plan B wrote:
Image


:olo: NAILED IT.




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I'm the dude!
I'm the dude!

Joined: 04 Feb 2002
Posts: 11301
PostPosted: 03-20-2012 08:19 AM           Profile Send private message  E-mail  Edit post Reply with quote


Why does Australia have all the weird-as-fuck creatures? It's like aliens visited the continent and left behind their petting zoo.



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Messatsu Ko Jy-ouu
Messatsu Ko Jy-ouu

Joined: 24 Nov 2000
Posts: 41097
PostPosted: 03-20-2012 08:20 AM           Profile   Send private message  E-mail  Edit post Reply with quote


not cool to talk about the abbos that way, bro.




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I'm the dude!
I'm the dude!

Joined: 04 Feb 2002
Posts: 11301
PostPosted: 03-20-2012 08:22 AM           Profile Send private message  E-mail  Edit post Reply with quote


:(



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What I feed my kids
What I feed my kids

Joined: 02 Mar 2007
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PostPosted: 03-20-2012 08:38 AM           Profile Send private message  E-mail  Edit post Reply with quote


abbos are fucking ugly ppl...




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Digital Nausea
Digital Nausea

Joined: 10 Feb 2001
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PostPosted: 03-20-2012 08:48 AM           Profile   Send private message  E-mail  Edit post Reply with quote


Ok, so the Milky Way is around 13 billion years old, and we are looking at a galaxy that is only 500,000 old. The astrophysicists say "We are looking at an object that was created only 500,000 years after the big bang.". Yet we are farther away from the big bang. Shouldn't it have expanded away from the big bang for the other 12,999,500,000 years? It's hard to explain. I'm sure I'm just confusing myself. Not sure though...




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What I feed my kids
What I feed my kids

Joined: 02 Mar 2007
Posts: 14414
PostPosted: 03-20-2012 08:51 AM           Profile Send private message  E-mail  Edit post Reply with quote


holy shit moron...stfu...




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god xor reason
god xor reason

Joined: 08 Dec 1999
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PostPosted: 03-20-2012 09:31 AM           Profile   Send private message  E-mail  Edit post Reply with quote


xer0s wrote:
Ok, so the Milky Way is around 13 billion years old, and we are looking at a galaxy that is only 500,000 old. The astrophysicists say "We are looking at an object that was created only 500,000 years after the big bang.". Yet we are farther away from the big bang. Shouldn't it have expanded away from the big bang for the other 12,999,500,000 years? It's hard to explain. I'm sure I'm just confusing myself. Not sure though...

Inflation. Space can actually travel faster than the speed of light. Because its space, fuck you.

So at the big bang, you have quantum fluctuations that trigger the release of positive, kinetic inflationary energy. That point of space nearly instantly expands by unfathomable amounts (many times the speed of light). Like heat is the byproduct of most releases of energy we know, matter was the byproduct of this energy release. So you get a uniform spread of matter across a huge area (an infinite area with finite time from our perspective, a finite area with infinite time from outside the bubble). After inflation happened, the only force pushing galaxies out is dark energy fighting against gravity.

To answer your question directly, yes the galaxy has been "expanded away from the big bang for the other 12,999,500,000 years". But we can't see that light yet. We can only see the picture that was taken when the light that is just now reaching us, left that galaxy. Imagine watching a football game by having someone mail you a stream of poloroid shots. You'll eventually see the entire game as it happened, but you've got to account for the delay of the postal system. You aren't watching it in real time.




Last edited by bitWISE on 03-20-2012 09:39 AM, edited 1 time in total.

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Canadian Shaft
Canadian Shaft

Joined: 01 Mar 2001
Posts: 17703
PostPosted: 03-20-2012 09:35 AM           Profile Send private message  E-mail  Edit post Reply with quote


Xeros, here is the thing... everything is expanding from everything else at same rate. So technically you are the center of the universe and everything in it is expanding away from you. I hope this helps.




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Elite
Elite

Joined: 08 Apr 2001
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PostPosted: 03-20-2012 09:47 AM           Profile Send private message  E-mail  Edit post Reply with quote


http://csep10.phys.utk.edu/astr162/lect ... nsion.html

Check that out and "The two dimensional analogy". The balloon analogy helped me understand space expansion, even though it isn't a perfect analogy.




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Etile
Etile

Joined: 19 Nov 2003
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PostPosted: 03-20-2012 09:52 AM           Profile Send private message  E-mail  Edit post Reply with quote


"farther away from the big bang"

oh lawdy




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Kempston Joy
Kempston Joy

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PostPosted: 03-20-2012 09:56 AM           Profile   Send private message  E-mail  Edit post Reply with quote


xer0s wrote:
I can't quite grasp the concept of looking at galaxies and other objects which are at the beginning of their life after the big bang.  So these objects are closer than we are to the origin of the big bang?  How would we be father away and yet not as old as these objects?  It would make sense to me, the farther away from the location of the big bang, the older you would be.  Could you clear this up?


Image




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opa!
opa!

Joined: 02 Mar 2000
Posts: 14252
PostPosted: 03-20-2012 11:01 AM           Profile Send private message  E-mail  Edit post Reply with quote


Image




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Bück Dich
Bück Dich

Joined: 21 Oct 2003
Posts: 5248
PostPosted: 03-20-2012 11:41 AM           Profile Send private message  E-mail  Edit post Reply with quote


Plan B wrote:
Image


quote for truth



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Intoxicated
Intoxicated

Joined: 26 Sep 2001
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PostPosted: 03-20-2012 03:15 PM           Profile Send private message  E-mail  Edit post Reply with quote


Doombrain wrote:
Image


:up: :up: :up:




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Glayven?
Glayven?

Joined: 23 Jan 2005
Posts: 13025
PostPosted: 03-20-2012 06:04 PM           Profile Send private message  E-mail  Edit post Reply with quote


xer0s wrote:
I can't quite grasp the concept...


So what else is new?




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Digital Nausea
Digital Nausea

Joined: 10 Feb 2001
Posts: 20078
PostPosted: 03-20-2012 07:42 PM           Profile   Send private message  E-mail  Edit post Reply with quote


There you are! :)




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no homo
no homo

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PostPosted: 03-20-2012 08:14 PM           Profile   Send private message  E-mail  Edit post Reply with quote


scared? wrote:
i see dumbos...EVERYWHERE!!!...


Then shut the laundry door.



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Glayven?
Glayven?

Joined: 23 Jan 2005
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PostPosted: 03-21-2012 09:05 AM           Profile Send private message  E-mail  Edit post Reply with quote


xer0s wrote:
There you are! :)


So am I to understand that you made this thread - with the whole forum laughing at your stupidity - just to get me to post in it?

Wow...you really...like..owned me....or sumthin...




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Elite
Elite

Joined: 08 Apr 2001
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PostPosted: 03-21-2012 09:54 AM           Profile Send private message  E-mail  Edit post Reply with quote


He means you're predictable.

Predictable and slow apparently. Lol...thinking it's about you.




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Digital Nausea
Digital Nausea

Joined: 10 Feb 2001
Posts: 20078
PostPosted: 03-21-2012 10:26 AM           Profile   Send private message  E-mail  Edit post Reply with quote


GONNAFISTYA wrote:
xer0s wrote:
There you are! :)


So am I to understand that you made this thread - with the whole forum laughing at your stupidity - just to get me to post in it?

Wow...you really...like..owned me....or sumthin...


lol, it's all about you...




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Glayven?
Glayven?

Joined: 23 Jan 2005
Posts: 13025
PostPosted: 03-21-2012 11:10 AM           Profile Send private message  E-mail  Edit post Reply with quote


xer0s wrote:
lol, it's all about you...


In all fairness you've made threads for me in the past...I was just playing the odds. :p




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Glayven?
Glayven?

Joined: 23 Jan 2005
Posts: 13025
PostPosted: 03-21-2012 11:12 AM           Profile Send private message  E-mail  Edit post Reply with quote


EtUL wrote:
He means you're predictable.


Well I guess that means everyone is predictable when it comes to trying to answer the questions of morons: we all laugh at them.

EtUL wrote:
Lol...thinking it's about you.


If I were a betting man, I'd bet 100 posts that xer0s did in fact think of me when he pressed the Submit button when creating this tripe...so I doubt I'm actually wrong about this.




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