Tilted asteroid orbits hint Solar System has a 10th planet
Tilted orbits of asteroids in the Kuiper Belt beyond Neptune give evidence of an unknown "planetary mass object" far beyond Pluto, according to a US-based research. This object would be different from and much closer than the yet-to-be-found hypothetical Planet Nine, researchers said. They hope the Large Synoptic Survey Telescope, which will start by 2020 will help solve the mystery.