The preposition is followed by its object (and words that modify the object in the prepositional phrase). A preposition is a word that occurs before a noun/pronoun in a clause. Preposition means, pre-before and position-the object's location.
The most widely accepted scientific explanation for the formation of the Solar System is called the Solar Nebular Model. According to this model, the entire Solar System formed around 4.5 billion years ago from the gravitational collapse of a small fraction of a giant molecular cloud, also known as a nebula.
The naturalistic story of the solar system goes back 4.5 billion years. In this view the solar system began as a cloud of dust and gas that collapsed on itself. A star began to form as the cloud was compressed by some unknown force. As the star spun and collected more mass, a disk of dust began to form the planets.