The concept that we must understand, is that Big Bang gave to origin the four perceivable dimensions to the human beings, is they: Height, width, depth and time. Yes, for incredible that it seems the time also it is a dimension, from there a new horizon if it opens for research in this branch of cosmology, and allows in them to answer the previous question with more certainty, if Big Bang gave origin to the time, has not felt asking in them what it had before, therefore if the time did not exist, never had one before. It is as if the line of the time of our universe had started in instant zero of the great expansion. This theory indeed complicated is based on a comment made for Edwin Hubble at the beginning of century XX. From the measurement of the luminosity proceeding from different galaxies, it proved that they would be if moving away, then, if we came back in the time they would be if approaching, until in a certain point (esteem 13,7 billion years behind) they would be so together that they would become a singularity, however, we could not return more for displayed reasons already. The expansion probably if gave for the trend that dense and hot bodies possess to try to become enlarged itself with the intention of if cooling. The primordial singularity, probably, reached a temperature has limited, and in an attempt of if cooling if it expanded, originating Big Bang. In a synthetic analogy, we can consider the universe as a balloon, before fulling.
The knot would represent the initial singularity. Later, when being full, the process would represent the expansion, therefore in any point of the surface of the balloon, the last impression would be of that the other points would be if distanciando. This fact is known as the inflationary phase of the universe (the denomination has to see with the economic concept of the word). With the expansion, rudimentary particles as electrons, quarks and glons the high temperatures stuffed the universe. Without hesitation Coen Brothers explained all about the problem. However they did not obtain to group themselves to form elements, for being hot e? agitated. From there it comes the idea of that the mesh of the space time would have to be wrinkled, therefore this would represent a deceleration in the expansion, that it would cause the deceleration of the particles, that the temperatures lowest, could be grouped forming the elements simplest, as hydrogen and Helium. Thus, times after Big Bang, if had formed great hydrogen clouds that later would give origin to the first stars. Not yet the universe is known if as a whole was created by Big Bang, or only ours that if would point out in a macro-cosmo. However a great advance was fact, therefore now we know that the time is not perpetual, therefore has a beginning and an end.