The nebular theory was proposed by Pierre-Simon Laplace in the late 18th century. This theory suggests that the solar system was formed from a rotating cloud of gas and dust, known as a nebula.
Laplace’s idea was that this nebula gradually collapsed under its own gravity, leading to the formation of the sun at the center and the planets in orbit around it. Over time, as the material coalesced, it formed the various celestial bodies we see today. The theory provides a comprehensive explanation for the structure of the solar system, including the orbits of the planets and their formation.
The nebular theory has been supported by various observations and studies in astrophysics, making it a foundational concept in our understanding of cosmic evolution.