A mysterious, unseen, planetary object with a mass somewhere between that of Mars and Earth may be lurking in the outer reaches of our solar system, according to new research.  Scientists at the University of Arizona’s Lunar and Planetary Laboratory (LPL) put forward evidence that this unknown “planetary mass object” may explain why the plane of the solar system is warped in the outer reaches of the Kuiper Belt. The Kuiper Belt lies beyond the orbit of Neptune and hosts a vast

number of minor planets, mostly small, icy bodies and a few dwarf planets. All planets in our solar system orbit around the sun on the same plane but, according to the measurements made by the research team, the most distant Kuiper Belt objects (KBOs) appear to be tilted away from this by about eight degrees. This indicates that something unknown is warping the average orbital plane of the outer solar system.  READ MORE