What theory describes the formation of our solar system?

The formation of our solar system is primarily explained by the nebular hypothesis. According to this theory, the solar system formed from a rotating cloud of gas and dust, known as a solar nebula, which collapsed under its own gravity about 4.6 billion years ago. As the nebula contracted, it flattened into a spinning disk, with the Sun forming at the center and planets forming from the remaining material through processes of accretion and collision. This theory is supported by observations of other star-forming regions in the galaxy.