the universe has always been, hard for man to comprehend, but true.
but until the big bang, when all matter that existed pulled together, and created the Universal Accelerator.
This caused all the matter to scatter and accelerate at 9.8 m/sec away from the source. The heaviest objects remained towards the the bottom, the Earth in its great disc, which protects itself from the full force of the UA. Which made life possible.
The lighter objects, like the sun, the moon, planets, and stars (which are very small compared to the Earth) are all above, and are not protected against the UA causing them to be spherical, and devoid of life.