Konstantin Batygin — How and when we are going to find Planet 9 [Vert Dider]

Kostantin Batygin is a Russian-American astronomer and Professor of Planetary Sciences at Caltech. In January, 2016, with his colleague Michael E. Brown, he described a possibility of a planet five times the mass of the Earth making full orbit around the Sun once every 10 thousand years. Although calculations show Brown and Batygin have a point, the planet is yet to be found.