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Author Topic: Do we know where the centre of the Universe is located?  (Read 2647 times)

Offline colarris

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Scientists know the location of the centre of our galaxy but do we know where the centre of the universe is?
« Last Edit: 28/09/2015 22:32:05 by chris »


 

Offline chiralSPO

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Re: Centre of the Universe?
« Reply #1 on: 20/09/2015 23:58:01 »
The center of the observable universe is here.

Because we don't know what lies beyond the observable universe, we cannot say for sure where the center is, and if the universe is infinite, there isn't any easily defined center, so either there is no center or everywhere is center.
 

Offline PmbPhy

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Re: Centre of the Universe?
« Reply #2 on: 21/09/2015 05:37:46 »
Scientists know the location of the centre of our galaxy but do we know where the centre of the universe is?
According to current theory the universe as we know it doesn't have a center, even if it's a closed finite universe. In such a case it'd be like asking where the center of the surface of a balloon is. Not the center of the balloon itself but within the surface. I.e. if you were an ant crawling on the surface of a sphere where would you go such that you could say that you were at the center of your world (which consists only of the surface where you can walk on)?
 

Offline colarris

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Re: Centre of the Universe?
« Reply #3 on: 21/09/2015 10:13:25 »
But isn't the Universe expanding and can you not calculate a point from which it is expanding from?
 

Offline dlorde

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Re: Centre of the Universe?
« Reply #4 on: 21/09/2015 15:45:45 »
But isn't the Universe expanding and can you not calculate a point from which it is expanding from?
As far as we know, all of spacetime is expanding, like the surface of a balloon expanding as it's inflated; and it's still the whole balloon even when it's small. At present, we don't know how big it was at the earliest time - it could be infinite to start with.
 

Offline acecharly

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Re: Centre of the Universe?
« Reply #5 on: 26/09/2015 21:55:48 »
Although there is no center in relation to the visual 3 dimensions we see, the fourth dimension or time has a center which would be at the start of time id say.
 

Offline Bill S

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Re: Centre of the Universe?
« Reply #6 on: 27/09/2015 00:11:31 »
Quote from: Acecharly
the fourth dimension or time has a center which would be at the start of time id say.

Wouldn't that apply only if time progressed in every direction from the start?
 

Offline mathew_orman

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Re: Centre of the Universe?
« Reply #7 on: 27/09/2015 09:29:58 »
Universe is continuous and has no absolute reference points...
 

Offline acecharly

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Re: Centre of the Universe?
« Reply #8 on: 27/09/2015 12:51:34 »
Quote from: Acecharly
the fourth dimension or time has a center which would be at the start of time id say.

Wouldn't that apply only if time progressed in every direction from the start?

Isnt it the case that space and time are combined as spacetime which id assume means if space moves out in all directions then time does also.
 

Offline Bill S

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Re: Centre of the Universe?
« Reply #9 on: 28/09/2015 21:42:08 »
Quote from: Acecharly
Isnt it the case that space and time are combined as spacetime which id assume means if space moves out in all directions then time does also.

Thus, if space has no centre, nor does time.
 

Offline PmbPhy

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Re: Centre of the Universe?
« Reply #10 on: 29/09/2015 04:46:00 »
Quote from: colarris
But isn't the Universe expanding and can you not calculate a point from which it is expanding from?
No. As someone said above the entire universe is expanding. If space is flat then its infinite and there's no center to an infinite plane. If the universe is closed then space is kind of like the surface of a sphere and there is no center to the surface of a sphere. I.e. if you walked all over the Earth then you'd never find a place which you can say is the center of the surface of the Earth. Please don't confuse this with the notion of the center of the sphere itself because they are very different concepts.
 

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Re: Centre of the Universe?
« Reply #10 on: 29/09/2015 04:46:00 »

 

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