"Exploring the Potential Number of Planets Hidden in the Kuiper Belt"

A study by Amir Siraj suggests that Mars-sized free-floating planets could exist in the Kuiper Belt, far beyond Pluto, at distances ranging from 600 to 3,500 AU from the sun. These rogue planets, potentially billions in number throughout the Milky Way, could have been captured by our solar system's gravity. Siraj's research, involving 100 million simulations, indicates the possibility of terrestrial planets in the outer solar system, which could provide insights into the formation and habitability of exoplanets. The study emphasizes the need for further research on the capture process of rogue planets and suggests microlensing as a method for their detection.