The Search for Planet 9

Explore the fascinating theory of Planet 9 in this 15-minute TEDxPortland talk by Dr. Renu Malhotra. Delve into the intriguing evidence suggesting the existence of a ninth planet in our Solar System, based on gravitational effects observed in the Kuiper Belt. Learn about the history of planetary discoveries, including Uranus and Pluto, and understand concepts such as giant planet migration and orbital resonances. Gain insights from Dr. Malhotra, an esteemed astrophysicist and member of the National Academy of Sciences, as she shares her expertise on extrasolar planets and the meteoric bombardment history of our solar system. Discover how cutting-edge research is reshaping our understanding of planetary formation and the potential for new celestial bodies beyond Neptune.

Introduction
Discovery of Uranus
Percival Lowell
Giant Planet Migration
Orbital Resonances