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If "you" agree with big bang then there must be a point of origin!
The galaxies are moving away from somewhere.
I've never read about or even heard of this being discussed on telly.
If its expanding, then where from?
If at all possible could you tell me the distance between "IT" and Earth in AU's.
Thank you and a Merry Christmas to all who answer.

2006-12-22 07:07:19 · 21 answers · asked by pjklondon 2 in Science & Mathematics Astronomy & Space

21 answers

There is no center to the expansion. It is the very fabric of space which is expanding. The situation is analogous to what happens when you blow up a balloon. Imagine that we drew various dots on a balloon to represent galaxies (with the surface of the balloon representing the spatial universe). When we blow up the balloon, the dots move apart from each other, but they don't all move away from any single point on the surface of the balloon.

2006-12-22 07:15:19 · answer #1 · answered by robert 3 · 3 0

First of all, no one knows. Having said that, I've heard that pretty much everything in the universe is moving away from everything else, at an accellerated rate. The universe is more complicated than a two dimensional circle where the center can easily be plotted by simply taking the mid point of the longest line the circle can contain . There are those much smarter than I that take the position there really is no "edge" to the universe... no defined boundries, as the whole thing is wrapped up in space/time. Sounding pretty vague so far? It gets worse! Since there are no edges or boundries to the universe, then there truly is no "center" of the universe. The center is simply the mid point between two defined edges. No edges, then no Center!

2006-12-22 15:33:59 · answer #2 · answered by Regular Guy 5 · 1 0

Just because the big bang theory would of had a piont of origin does not mean that that would be its center , if you believe the universe is always expanding then its highly unlikley that it is and has been since the begining expanded equally on all sides (if the universe has sides) which would the make a central point, possible else the center would always be changing from one point to another within reason.

2006-12-24 20:39:30 · answer #3 · answered by Goffy 1 · 0 0

Check out the analogy:

The Universe has 3 spatial dimensions, but it is easier to visualize an analogy to its expansion for the 2-dimensional surface of a balloon. There is no center. If you stand on any galaxy, all the others will appear to be moving away from you with a velocity proportional to the distance from you. An analogy in 2 dimensions is to put dots on the surface of a balloon and blow the balloon up. As it expands, there is no dot that is the "center", but if you stand on any dot you will see all other dots moving away from you (and the rate at which they move away will be proportional to the distance. Dots close to you will be moving away slower than those further away). The expansion of the Universe appears to be like this, but in 3 rather than 2 space dimensions, which makes it much harder to visualize, but it is possible to describe it mathematically.

2006-12-22 15:13:54 · answer #4 · answered by 006 6 · 1 0

The 'where' is impossible to know. It is intrinsically linked to the Time and Space of Einstein's Relativity... or Hawking's "Brief History of Time" diatribe. The 'When' is the crux.... there was no physical space which to measure prior to 'The Big Bang'. The astronomical unit is a convenient measurement but useless in attempting to measure this.

Bill Bryson's - "A Short History of Nearly Everything" is the most entertaining and commensical layman's description I've come across.

Incidentally, try not to use 'The Telly" as a reliable source for your inquisition into such a vast conceptual realm as Theoretical Astrophysics. If you have difficulty reading, the above books are all available as Audio Books. Take a listen and ignore the tingling sensation in the back of your skull as you stretch yourself to comprehend... Dendrites are your friend. ;

Regards,

NFLDAdDenDum

2006-12-22 19:45:04 · answer #5 · answered by nfldaddendum 1 · 1 0

This is a complicated subject to answer here. But it is summed up in the links below.

Basically, remember that Big Bang Theory is just that: A theory. It's not fool proof (or it would be a law) and it will constantly be debated (as it should be).

This type of theory has its origins in math and when you try to quatify distances you have to have a reference point. In space, its hards to have such a reference point. If you measure where everything is moving away from (or the center) then it would be where ever you begin.

Thus, if you measure from Earth, then Earth would be the center. Likewise if you measured from the some distant start then it would appear that that star would be the center.

It's hard for me to explain (I'm no scientist) but try the links below.

2006-12-22 15:10:12 · answer #6 · answered by Drew P 4 · 1 2

No, all of space and time is confined to the universe. And the universe began as a singularity, then expanded very rapidly and is still expanding. So it happened everywhere. The point of origin is everywhere.

The galaxies themselves are not moving, it is the space between the galaxies that is increasing, because the universe itself is expanding.

2006-12-22 15:10:21 · answer #7 · answered by david d 3 · 4 0

The defined 'place' where it happened is not yet found, and its hard to detect since almost every galaxy seems moving away from all others.
one can just calculate the origin from carefully observing all movements, and try to solve this question by calculating a model. But since our capabilities to observe the universe in the direction of our galaxies plane are more than limited we won't ever get a complete picture to conclude where it exactly was.

2006-12-22 19:38:49 · answer #8 · answered by blondnirvana 5 · 1 0

you obviously did not study the big bang theory very well

the point of the big bang was the ENTIRE universe. the entire universe is expanding, every part away from every other part. but every part was also part of the original point of the big bang. EVERYWHERE was part of the point of origin.

2006-12-22 15:10:14 · answer #9 · answered by Kutekymmee 6 · 9 0

The centre of the Universe is Relevant to the observer. If you was on Galaxy M51, that would be the centre of the Universe for one of its inhabitants.

2006-12-22 15:15:08 · answer #10 · answered by Old Man of Coniston!. 5 · 1 1

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