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.
This new, cyclic model of the universe offers an appealing alternative to the prevailing theory, according to Paul J. Steinhardt, a theoretical physicist at Princeton University.n the most widely accepted cosmological model, called the inflationary model, the universe was born in an instantaneous creation of matter and energy known as the Big Bang. As the universe has inflated since that event, matter and energy have spread out in clumps.