New York, Oct 22: Planet Nine — the undiscovered one at the edge of our solar system — appears to be responsible for the unusual tilt of the Sun, say researchers. Planet Nine was predicted by Konstantin Batygin and Mike Brown from California Institute of Technology’s (Caltech) in January this year. The large and distant planet may be adding a wobble to the solar system, giving the appearance that the sun is tilted slightly. “Because Planet Nine is so massive and has an orbit tilted compared to the other planets, the solar system has no choice but to slowly twist out of alignment,” said Elizabeth Bailey, graduate student at Caltech and lead author of a study announcing the discovery. That plane, however, rotates at a six-degree tilt with respect to the sun—giving the appearance that the sun itself is cocked off at an angle. (IANS)