Background radiation indicates a massive explosion approximately 15 billion years ago. The far stars are flowing outward at near the speed of light according to Hubble measurements.
However the universe is a very complex entity. It is more than three simple dimensions. In addition it does not expand like a simple sphere. Thus a multiplcity of big bangs occurred simultaneously or at staged intervals. How doe the universe work?
The is no anti-matter clearly present in the universe. Why? We livein an electrical universe so that only coulombs, meters, and seconds are the required units. Mass in grams has the same units as charge. Einstein thought that Massa = Charge and this appears to be the correct answer.
At the center of our galaxy lies a black hole. What is it? It is an electrical node in which energy flows from our stars through the electrical conductivity of space into the black hole. The hole reaches maximum energy which is much greater than the energy of the galaxy stars. The hole explodes and new antimatter stars and antimatter planets forms.
At near zero dimensions the time clock within the hole runs very fast. One years of our time is a million years with the black hole since events are extremely fast to us but the same to them. To people living upon very small planets, the time to them does not seem any faster than our clock since they are very small.
We are approximately 28,000 light years from the black hole. No doubt it exploded many years ago. Biblical prophets envisioned new Earths and a lake of fire. Thus in the near too distant future our Sun and Earth will be eaten up by anti-protons and anti-electrons of enourmous energy levels. The result with be the destruction of our galaxy and later the entire universe and the replacement by an antimatter universe.
Hindu philosophy shows a snake eating its tail. That is what happens. The universe does not really compress again to a pinpoint. It is like a waterfall which flows back into the pond and shoots up into the air.
The we have a perpetual oscillations in which the universe always refreshes and regenerates itself.