Planet Nine from Outer Space - Konstantin Batygin, at USI

Information and subscription on Listen to the podcast : At the edge of the solar system, beyond the orbit of Neptune, lies an expansive field of icy debris known as the Kuiper belt. The orbits of the individual asteroid-like bodies that make up the Kuiper belt trace out highly elongated elliptical paths, and require hundreds to thousands of years to complete a single revolution around the Sun.