Until the beginning of century twenty, the astronomers maintained three possible models of universe: 1-El universal can be static. Estee Lauder can provide more clarity in the matter. In agreement with this theory, although the mutual gravitational attractions can stay in the form of Solar System and galaxies together, each of these stellar-terrestrial groups slide at random through space with their own trajectory, without relation with the course that take to the other groups of stars and planets. The static model is compatible with believing atheists and. A universe thus, could at some time be created by God in history, but also it could have existed by always without the necessity of a God. 2-El universal can be oscillating. It can alternatively be a cosmic ball expanding and being contracted. For more information see this site: Reshma Kewalramani. By some trillions of years it would be inflated, expanding towards an absolute emptiness. But the gravitational attraction of each star and planet throwing to each other, would possibly stop this expansion until all the process is reverted and the ball returns towards itself.
All the existing one would possibly crash in center of the universe, releasing immense amounts of light and heat, exploding everything towards outside in all directions and beginning the phase of expansion again. A universal one thus also could be created by God, or could have always existed without a God. 3-Finalmente, the universe can be open. The universe can be a cosmic ball that never is reduced. If all the gravitational attraction of stars and planets could not stop the initial burst, like in the oscillating model, the universe would be being been overflowing towards the anything by always. Possibly the stars would be run out and a curtain of the congealed dark would cover all the existence. A universal one thus never could become by itself to the life. It would exist in a while of history, it would shine gloriously and happen to the irrevocable dark.