Posted December 12, 2011
How is it possible to observer light sources 46 billion light years away in a 14 billion year old universe?
This question / problem has been solved by JMich
GoodOldJim
<3
Registered: Jun 2009
From Canada
SimonG
SimonG597
Registered: Sep 2010
From Germany
MonstaMunch
roar
Registered: Oct 2011
From Cambodia
Posted December 12, 2011
A lightyear is a measure of distance, time is only used as a means of working out the distance of a lightyear, therefor why wouldn't it be possible?
SeduceMePlz
Foolish Mortal
Registered: Mar 2011
From United States
Barefoot_Monkey
invertEd
Registered: Sep 2008
From South Africa
Posted December 12, 2011
They used to be closer, so the light hasn't travelled the entire 46 billion light years.
Of course, this raises further questions.
Of course, this raises further questions.
JMich
A Horrible Human Person. If you need me, chat.
Registered: Apr 2011
From Greece
Posted December 12, 2011
So, the 2 facts needed are these
1) The universe is expanding, so 2 points in space that used to be 1 parsec away from each other may now be 10 parsecs away.
2) The 1st point did interact with the 2nd, and the results of that interaction can still be measured, and we get proof of matter that exists beyond visual range.
Antimateria
Insert liquor
Registered: May 2011
From Finland
Posted December 12, 2011
I don't know much about english writing.. people can vouch for that.. Question if it was..
Well, you can light sources to those galaxy things with a torrent which has been bathed in potion of +30 candlelight.
And who says that there is just one universe to lit.. Oh right, the poster. I would use the ring of minor purposes and steal a wallet.
Well, you can light sources to those galaxy things with a torrent which has been bathed in potion of +30 candlelight.
And who says that there is just one universe to lit.. Oh right, the poster. I would use the ring of minor purposes and steal a wallet.
GoodOldJim
<3
Registered: Jun 2009
From Canada
Posted December 12, 2011
Post edited December 12, 2011 by Darling_Jimmy
SeduceMePlz
Foolish Mortal
Registered: Mar 2011
From United States
Posted December 12, 2011
Idk. Suggested it bcuz it was the first thing coming to mind that might have something to do with the discrepancy. Ask a scientist? ;-)
Antimateria
Insert liquor
Registered: May 2011
From Finland
Posted December 12, 2011
After these years I can't even count my fingers.
Edit: I use notepad and I use calculator to most simple things.
Infact if those hackers again strike at something.. Why not wikipedia? We all lose the talent to use fine words. Which are not Thu'um.
Edit: I use notepad and I use calculator to most simple things.
Infact if those hackers again strike at something.. Why not wikipedia? We all lose the talent to use fine words. Which are not Thu'um.
Post edited December 12, 2011 by Antimateria
Jarmo
- censored -
Registered: Jan 2009
From Finland
Posted December 12, 2011
Except if the light source that's now (estimated to be) 46billion light years away was actually no more than 14 billion light years away 14 billion years ago.
Funny thing space. Nothing we see there is *now".
Even the closest stars we see as they were many years ago.
42.
GoodOldJim
<3
Registered: Jun 2009
From Canada
Shloulet
New User
Registered: Oct 2010
From United States
SeduceMePlz
Foolish Mortal
Registered: Mar 2011
From United States
Posted December 12, 2011
Wouldn't that just mean that the object is actually further away than it "appears" to us now (because it has moved since the light was transmitted)? It would have still been 46 billion light years away when the light was transmitted... or am I missing something? Prob am... Me am not skilled in astrophysics. ;-)
Post edited December 12, 2011 by ddmuse
JMich
A Horrible Human Person. If you need me, chat.
Registered: Apr 2011
From Greece
Posted December 12, 2011
Let's go for another try at explaining.
Assume the universe is a sheet, and we are at the center of it. No matter how big the sheet is, we can only see a total distance away from us which is calculated as "Age of Universe * Speed of Light". So if the Age of Universe is 13.7 Billion Years, we can see anything that exists in a distance of 13.7 Billion Light Years.
However, the universe isn't a sheet. It's a rubber sheet, that someone is pulling it. The further away the point is from us, the faster it moves away (Hubble's Law). If the distance is great enough, the point will be moving faster than light in relation to us, even though the point itself won't be moving in a faster than light speed (see here).
So, a point that was 6 billion light years away from us when the universe was 6 billion years old may now be at 20 billion light years away, which even though is outside our observable range, it was not outside it before.
The layman's term would be that we take a photo now, but by the time we develop it, the object has moved further away.
Assume the universe is a sheet, and we are at the center of it. No matter how big the sheet is, we can only see a total distance away from us which is calculated as "Age of Universe * Speed of Light". So if the Age of Universe is 13.7 Billion Years, we can see anything that exists in a distance of 13.7 Billion Light Years.
However, the universe isn't a sheet. It's a rubber sheet, that someone is pulling it. The further away the point is from us, the faster it moves away (Hubble's Law). If the distance is great enough, the point will be moving faster than light in relation to us, even though the point itself won't be moving in a faster than light speed (see here).
So, a point that was 6 billion light years away from us when the universe was 6 billion years old may now be at 20 billion light years away, which even though is outside our observable range, it was not outside it before.
The layman's term would be that we take a photo now, but by the time we develop it, the object has moved further away.
Post edited December 12, 2011 by JMich