does big bang necessarly mean t=0?

Question

if the expansion of the universe stops. could its contraction lead to an "infinite" amount of energy being condensed in an infinitely confined space leading to another big bang.

if the the universe follows a cycle of expansion and contractions then should one argue that before the big bang there was not time or space ?

In other words is the continuum "elastic"

the fact that the space might end up being squized in an infinitly confined space does not mean that space does not exist therefore time should still exist however the continuum should also be considered as something which expands and contract

Answer 1

One of the biggest questions in cosmology at the moment is whether the expansion of the universe will slow down and stop leading to a cycle of:-
Big Bang...Expansion...Contraction...Big Bang
or whether it will continue expanding forever.

It seems that the present observable matter in the universe does not have enough mass to halt the expansion and everything hinges on how much "dark matter" the universe contains. Dark matter is said to permeate the almost infinite volume of space. It has an unknown but certainly very low density but the total mass contained in the vast volume of space may be several times greater than all the observable matter combined.

If there is enough dark matter, the expansion will eventually stop and be reversed, if there isn't it will go on for ever and the universe will become a dark, empty place as all the stars eventually burn out.

The current thinking is that there is insufficient dark matter to stop the expansion but either way the universe as we know it will cease to exist.

Not a very exciting prospect but since none of us will be around to see it, why worry.

At least that's one piece of destruction mankind can't be blamed for.

Answer 2

What was God doing before the big bang? Creating a special hell for the people that ask that question.

Seriously, the space-time that we experience were created in the big bang, therefore OUR space & time did not exist before the big bang. There is speculation about what did exist before the big bang, but it is difficult to imagine what it would be and even harder to describe it in simple terms. It would not be unreasonable to assume that there was some form of space and time that our universe suddenly popped up in. It is a very interesting question, but you'll find more answers in science fiction than in science.

At some point in the past there was a gigantic fluctuation in the vacuum energy of a single point where enough energy to create our entire universe suddenly appeared. You may believe this was the concious act of a Creator, or maybe the janitor in a higher-dimensional physics lab knocked over the wrong beaker. Maybe the big bang was immediately preceeded by the words "What happens when you press this button?".

Answer 3

Time cannot exist unless there is matter for it to act upon and be measured against and, equally, for matter to exist it must have a lifespan. All matter decays; plants rot, creatures age and die, uranium decays into lead, my bank balance shrivels so fast that I think it's slightly out of phase... (sorry, got carried away there!)

To take the lifespan of matter to its logical earliest limit, it can be seen that matter must be created. That creation can be the meeting of sperm and ovum or it can be the combining of two molecules or it can be anything in between. Creation occurs at a fixed point in time, therefore time will continue to affect the object and thus dictate its lifespan.

Consider a black hole. Matter and time are compressed beyond all recognition. Gravity therefore affects time as we know it. However mass can overcome gravitation. To prove this take a polystyrene chip and throw it into the air. It will rise maybe two or three feet before gravity reclaims it. For the decimalised folks a foot = 30cm.

Now try it with a child's toy - a glass marble. Roughly the same surface area as the poly chip but it will rise much further before it succumbs to the gravitational field again. You may state that this is mass combined with propulsion and I would not argue, but consider a microwave oven. It causes heat through friction by agitating the molecules in the food. Now, to return to the black hole, compression also produces heat which in turn causes motion. If you don't believe it, check out the science to do with the Earth's core. It is pressure that causes the core to remain molten and mobile at some 6200 degrees C. Translate that to the utterly fantastic compression that occurs within a BH and you can draw the conclusion that it is incredibly hot inside one of those things and that the compressed material will be racing around at a phenomenal rate albeit in a seriously limited radius. Eventually the contents would have to reach critical mass which would lead to nuclear fission or its inside-a-BH equivalent (generating still more heat and motion) so you would have two masses constantly banging into each other creating fusion. A nuclear bomb on a cosmic scale. There you have mass and propulsion just like the Earth's core, only a whole lot hotter.

Come out of the BH for a moment and take a deep breath in the open.

The universe is expanding at a known rate and it is the inertia from the so-called Big Bang that is causing this to happen. Eventually the inertia will fade because the gravity inherent in neighbouring masses will act against it. When inertia fades beyond a certain point, the same gravity in each molecule will take over and begin drawing the whole lot back together again. That will put everything in the universe closer to the black holes that exist within it. There will be collisions along the way because the older material will lose its inertia earlier than the younger stuff towards the centre of the universe.

Could the universe have edges? Entirely possible if you are willing to consider that ours should not be the only one in existence. Ours is not the only galaxy in our universe; why should galaxies be the limit to the existence of multiples? Imagine a whole series of universes existing alongside each other, with the logical shape being a hexagon or probably the cubical version of it. It has a name but I don't know what it is. Basically, try and imagine a 3-D honeycomb and you'll see what I mean. As one universe died its shrinkage would make room for the expansion of a new one. It is possible that these universes form a globe that floats in....what? I'm not going to think that far because that way lies probable insanity. The human mind is not yet equipped to deal with the concept. Just suffice it to say that everything we know has a globular form, or a rough approximation thereof - atoms, molecules, even planets and stars, simply because the sphere is the most efficient form that anything with volume can take. If there are multiple universes you can see what they look like by generating soap bubbles in a confined space and watching the shape that they adopt. It'll be that hexagonal-cubey thingy.

Black holes are known to occur in varying "strengths", so it is logical to assume that the larger and stronger ones will "prey" upon the weaker ones as the space they are all trying to occupy becomes a premium commodity. So there will come into being "super black holes" and finally a mega black hole that will contain and have compressed everything in the universe, at which point time will cease to exist as it will have no matter left to act upon or be measured against. At that point the heat generated by the matter contained, as well as its compressed mass (remember the heat/movement overcoming gravity mentioned at the beginning), will cause the mega black hole to explode and time will once again have matter to act upon so the whole process will begin anew. I believe that both the end and the new beginning may be simultaneous and thus matter would transition from 0 time to a constant flow. 0 time, in this case, would have 0 duration.

Answer 4

Time and space both started with big bang. Time is a difficult concept for us to understand since we pass though it at what we perceive to be a uniform rate. The ideas of time starting, pausing or running backwards are outside of our experience and we can only appreciate them mathematically.

If we have a cyclic universe, each half-cycle is a different universe. Time starts with each big bang, pauses when the universe reaches its limit then runs backwards until big bang happens in reverse.

If you plot expansion against time, you get a linearity - so in human terms, the universe will expand for ever. If expansion slows down, so will time. That then gives rise to the problem of what is the yardstick against which you are measuring expansion, contraction and big bang. You'll find a list of counselling services at the end of the book.

Answer 5

Yes. Time and space are conditions of the universe. If the universe doesn't exist then neither do those conditions.

There is no such thing as "before" the universe because "before" is a consideration of time, and time is a condition of the universe. And as stated above, if there is no universe then there are no conditions.

Same with space. There is no such thing as "outside" the universe because "outside" describes a consideration of space, which doesn't exist without the universe.

Think about this. If there is no such thing as "outside" the universe, then the universe can not have a boundary or a border. And by definition if something doesn't have a boundary it also can not have a center.

Answer 6

The Big Bang Theory means the same with or without a God.

Answer 7

Creation of Matter Moment by Moment

In short, the universe and its building blocks, the atoms, have come to exist in the immediate aftermath of the Big Bang after having not existed, thanks to these balances created by Allah. Scientists conducted numerous researches to understand the chronology of the events that took place during this process and the order of the rules of physics in effect at each phase. The facts all scientists who have worked on this subject today admit are as follows:

Moment "0": This "moment" when matter and time were non-existent,
http://www.harunyahya.com/atom02a.php

Answer 8

As far as I know..(and I studied astronomy GCSE) the point of the big bang is that t=0 yes. (for those who don't know t referring to time). And yes, that is the current theory followed by most scientists..they refer to that as the big crunch.

Answer 9

All your arguements agree with some of the theories of some of the leading minds

Answer 10

Hi

Ok, thing is if the big bang really occured then we came out of thin air, impossible!

good luck