What came before the Big Bang?

Answer 1

It seems fairly likely that there was a Big Bang. The obvious question that could be asked to challenge or define the boundaries between physics and metaphysics is: what came before the Big Bang?
Physicists define the boundaries of physics by trying to describe them theoretically and then testing that description against observation. Our observed expanding Universe is very well described by flat space, with critical density supplied mainly by dark matter and a cosmological constant, that should expand forever.
If we follow this model backwards in time to when the Universe was very hot and dense, and dominated by radiation, then we have to understand the particle physics that happens at such high densities of energy. The experimental understanding of particle physics starts to poop out after the energy scale of electroweak unification, and theoretical physicists have to reach for models of particle physics beyond the Standard Model, to Grand Unified Theories, supersymmetry, string theory and quantum cosmology.
This exploration is guided by three outstanding problems with the Big Bang cosmological model:
1. The flatness problem
2. The horizon problem
3. The magnetic monopole problem


Flatness problem
The Universe as observed today seems to enough energy density in the form of matter and cosmological constant to provide critical density and hence zero spatial curvature. The Einstein equation predicts that any deviation from flatness in an expanding Universe filled with matter or radiation only gets bigger as the Universe expands. So any tiny deviation from flatness at a much earlier time would have grown very large by now. If the deviation from flatness is very small now, it must have been immeasurably small at the start of the part of Big Bang we understand.
So why did the Big Bang start off with the deviations from flat spatial geometry being immeasurably small? This is called the flatness problem of Big Bang cosmology.
Whatever physics preceded the Big Bang left the Universe in this state. So the physics description of whatever happened before the Big Bang has to address the flatness problem.

Horizon problem
The cosmic microwave background is the cooled remains of the radiation density from the radiation-dominated phase of the Big Bang. Observations of the cosmic microwave background show that it is amazingly smooth in all directions, in other words, it is highly isotropic thermal radiation. The temperature of this thermal radiation is 2.73° Kelvin. The variations observed in this temperature across the night sky are very tiny.
Radiation can only be so uniform if the photons have been mixed around a lot, or thermalized, through particle collisions. However, this presents a problem for the Big Bang model. Particle collisions cannot move information faster than the speed of light. But in the expanding Universe that we appear to live in, photons moving at the speed of light cannot get from one side of the Universe to the other in time to account for this observed isotropy in the thermal radiation. The horizon size represents the distance a photon can travel as the Universe expands.
The horizon size of our Universe today is too small for the isotropy in the cosmic microwave background to have evolved naturally by thermalization. So that's the horizon problem.

Magnetic monopole problem
Normally, as we observe on Earth, magnets only come with two poles, North and South. If one cuts a magnet in half, the result will not be one magnet with only a North pole and one magnet with only a South pole. The result will be two magnets, each of which has its own North and South poles.
A magnetic monopole would be a magnet with only one pole. But magnetic monopoles have never been seen? Why not?
This is different from electric charge, where we can separate an arrangement of positive and negative electric charges so that only positive charge is in one collection and only negative charge is in another.
Particle theories like Grand Unified Theories and superstring theory predict magnetic monopoles should exist, and relativity tells us that the Big Bang should have produced a lot of them, enough to make one hundred billion times the observed energy density of our Universe.
But so far, physicists have been unable to find even one.
So that's a third motivation to go beyond the Big Bang model to look for an explanation of what could have happened when the Universe was very hot and very small.

Answer 2

Astrophysics has reached today is that the entire universe, together with the dimensions of matter and time, came into existence as a result of a great explosion that occurred a long time ago. This event, known as "The Big Bang," is the catalyst for the creation of the universe from nothingness. This explosion, all parties in the scientific community agree, emanated from a single point some 15 billion years ago. (See Harun Yahya, The Creation of the Universe, Al-Attique Publishers Inc. Canada, 2000)

Before the Big Bang, there was no such thing as matter. From a condition of non-existence in which neither matter, nor energy, nor even time existed-and which can only be described metaphysically-matter, energy, and time were all created in an instant.
http://www.harunyahya.com/miracles_of_the_quran_p1_02.php#1a

Answer 3

This will answer all the fundamental questions of the universe.

Fact 1
Everything in the universe follows a cycle
Fact 2
The composition of the universe is made of repetition of the same design by invariance of scale refered to "as the fractal caracter of the universe"

There is a relation between time and size dimensions and scale determines how fast time goes,
what seems to be taking an infinite time to happen would be infinitly short for something infinitly largeur than the universe

In the universe everything is made of iteration of same strcuture by invariance of scale, so beyond our little universe there is something infinitly larger which might follow the same structure iteration but there, time and level of energy are infinitly larger than in our little confined space.

An easy way to comprehend the above is to think about scale. The smaller the size (therefore quantum of energy) the faster the speed. Electrons for instance go so fast that we can only do probabilities on their position, the level of energy of photons is so small that their speed reaches the speed limit of what we have measured so far.

Now the answer is, before the big bang could have been anything, another expension then contraction preceded by another big bang, the truth is that nobody will ever be able to tell because we are part of something infinitly larger and our universe could have been triggered by something in it.

it would be like standing on a quark and asking if there is life out there, when life is above staring at you but you can not see it because you are infinitly smaller than it. Something in the infinitly larger universe could release a litle bit of its energy and could blow up your entire universe in what would take no time for it. Still, you would never know how it happened.

In conclusion the scale of our understanding will always remain within the limits of our dimensions.
The paradox about "Big" is when it is too big, you can not see it.

Answer 4

We are told that after the Big Bang the universe started to expand and will eventually collapse back onto itself (the Big Crunch). When that happens an unstable state may exist and a new Big Bang may occur. Perhaps the current BB is just one in a series of BBs that have and will continue to occur.

Answer 5

before the big bang there was nothing just infinent space now think of infinent that means anything can an will happen infinent times so bang matter appered everything in the universe is not going to last forever eventually all the rock planets suns ect will turn back to dust and eventually nothing and then bang you cant have infinity without infinent possibilitys so matter will appear again like magic because if it diddent then maths and science ect would all be wrong.so before the big bang there was probably a spec of something left from the last universe and that died and bang along came another because you cant have infinent nothing

Answer 6

As time began at the instant of the big bang the question cannot apply

Answer 7

Science has no clue what existed before the big bang.

Answer 8

God was there before the Big bang. It was God who made the Big Bang

Answer 9

Little bang

Answer 10

the end of the last universe.blackholes devour everything .they merge getting bigger in gravity not size untill all matter all light time completely then nothing . big bang.