Long before Earth and the stars that you see in the night sky were created, there were thousands upon thousands of planets throughout the universe supporting life. The inhabitants of the planets live in peace. The gods were pleased. Yes, I said "the gods," not one, not just your god but all the gods. Even back then no one knew how many there were, how they came to be, or where they came from.
Some of the inhabited planets were only a few million miles apart. As the inhabitants of the planets began to venture out into space they encountered other races and cultures. Wars broke out. And soon the whole universe was filled with warring planets determined to conquer one another. The gods became angry. Mankind had become a disappointment. The gods decided to put an end to all the violence.
Your scientists got the big bang theory practically right. It wasn't the creation of the universe. It was the destruction of the universe. Earth and what you see in the night sky is the aftermath, the rubble, you might say, of a universe that had been home to thousands upon thousands of inhabited planets.
