First, the big bang exploded scattering of vacant space substances important to know whether the big bang, was the rapid expansion of space itself. What this means, is that there is in the center of each point in the universe.

For a moment, the universe , think of it as a balloon on the empty spots . These dots represent clusters of galaxies do . Balloon swells every point than the other will go away . The space between galaxy clusters , just like the rest of the universe , is expanding at an increasing rate ( gravitational force, set themselves is to keep the same size ) .
Edwin Hubble , this phenomenon was first observed in 1929 and the spectrum of light from distant galaxies is shifted to the red zone did notice , just as the effects observed were, while the expanded light through space would be like. By measuring the wavelength of light , Hubble galaxy is proportional to its distance from each other, I found that a rapidly expanding .
In the beginning, the universe was a single point . Where was this point ? This point was at that time anywhere , this time , it is everywhere . Even scientists have evidence on this issue : the light from the big bang , cosmic radiation is fill in the form every aspect of our sky .