Did a Planet Escape the Solar System?

The video explores the history and formation of the solar system, focusing on the movement of planets and the possibility of an extra planet that was ejected. It discusses the Nice Model, which suggests that outer planets formed closer to the Sun and later migrated outward. Simulations often struggle to replicate the current solar system without losing Mars or other planets, leading to theories of an additional planet. This hypothetical planet, possibly an ice giant, might have been ejected, explaining some anomalies. The video concludes with the idea that further simulations and observations of other star systems could provide more insights.

What is the significance of the extra planet hypothesis in understanding our solar system?

How might the existence of an ice giant explain the current configuration of the solar system?