So what caused the formation of the Solar System? One possibility is the shock from a low mass Supernova explosion.
Researchers Propose Low-Mass Supernova Triggered Formation of Solar System
A research team led by University of Minnesota School of Physics and Astronomy Professor Yong-Zhong Qian uses new models and evidence from meteorites to show that a low-mass supernova triggered the formation of our solar system. The findings are published in the most recent issue of Nature Communications, a leading scientific journal.