The story of Planet 9 began in earnest in early 2016, when astronomers Mike Brown and Konstantin Batygin published a paper called “Evidence for a Distant Giant Planet in the Solar System.” Batygin and Brown showed that there are groups of KBOs whose orbits are shaped in such a way that only the presence of another planet can explain them: Planet 9.
Supposed orbit of the Planet 9
Fred Adams from the University of Michigan believes that Planet Nine will be spotted within the next 10 to 15 years. The analysis suggests that Planet Nine is smaller and closer to the sun than previously thought. The computer produced model predicts Planet Nine is about five to ten times as massive as Earth and orbits approximately 37 billion miles (60 billion kilometers) away. In a 92-page paper to be published in Physics Reports, a team of researchers at Caltech review the evidence for Planet X’s existence. For now, some answers are unclear, but the new studies support the idea that Planet Nine exists.