It is invalid to think that the universe was without the earth, the solar system or even the sun for around 9 billion years for the simple reason that the universe is self, the earth is self, the solar system is self and the sun is self. As to the origin of self? The origin of self is self not wanting to be by itself. It's all about companionship really; companionship, friendship, love.
Wald Wassermann, Physicist