For the solar capture theory, see this article’s section on Solar System formation. Origin and evolution of system science pdf the lunar capture theory, see this article’s section on lunar formation.
Solar System”, simply because almost no one knew or believed that the Solar System, in the sense we now understand it, existed. The first step towards a theory of Solar System formation was the general acceptance of heliocentrism, the model which placed the Sun at the centre of the system and the Earth in orbit around it. This conception had been gestating for thousands of years, but was only widely accepted by the end of the 17th century.
The first recorded use of the term “Solar System” dates from 1704. Axis scale: billions of years ago. The most widely accepted theory of planetary formation, known as the nebular hypothesis, maintains that 4.
6 billion years ago, the Solar System formed from the gravitational collapse of a giant molecular cloud which was light years across. Several stars, including the Sun, formed within the collapsing cloud. The gas that formed the Solar System was slightly more massive than the Sun itself. Just as the Sun and planets were born, so they will eventually die.