A New World’s Extraordinary Orbit Points to Planet Nine. Quanta
Tilted World Points to Planet Nine A newly discovered object hints at a massive planet beyond Neptune. 1. Nearly all objects in the solar system lie on the same plane. 2. The new object 2015 BP519 has an orbit tilted 54° above the plane of the solar system. 3. Astronomers cannot explain the puzzling orbit of 2015 BP519 without making reference to Planet Nine, a hypothetical planet with a mass 10 times that of Earth.