In the nebular hypothesis, proposed by Pierre-Simon Laplace in the late 18th century, he suggested that after the formation of the Sun from a rotating cloud of gas and dust (the nebula), the remaining material in the nebula began to coalesce and form the planets, moons, asteroids, and other bodies of the solar system.
Laplace envisioned that as the Sun formed and began to shine, the gravitational forces acting on the surrounding material caused it to clump together and form smaller bodies. These bodies continued to collide and merge over time, ultimately leading to the formation of the various planets and their satellites, as well as smaller objects like asteroids and comets.
Furthermore, Laplace hypothesized that the motion and distribution of these planets could be explained by their interactions with the Sun's gravity and the original angular momentum of the rotating nebula. This process described a dynamic and evolving solar system, where the gravitational forces and conservation of angular momentum played crucial roles in the arrangement and movement of celestial bodies.