there was no Big Bang... but more of a Big Conversion... the "universe" was at one time nothing but energy waves of all kinds, and at one point enuf energy collided to create matter ( E=MC^2 but in inverse,, M = E/C^2) once this process started and matter was present, gravity came about and the Cosmic Background Radiation is actually the wavefront of where this energy/matter conversion is taking place creating the simplest parts of matter which form rapidly into hydrogen... eventually the gravity of hydrogen causes strands of gravity to appear and over billions of years stars form, explode and create heavier elements and other wild things like neutron stars and black holes, which BTW create enuf gravity to create galaxies.... and heres the clincher... our "universe" isnt the only one.. these bubbles of creation of matter are all over the place, we cant see them due to the CBR "wall" being in the way... I could go on with this for hours