Planet Nine found on fringes of solar system

Astounding evidence of a hidden giant planet on the fringes of the solar system has been uncovered by scientists using computer simulations. 

The mysterious world, nicknamed Planet Nine, is about 10 times bigger than the Earth. It is thought to be gaseous and similar to Uranus or Neptune.

Scientists believe it traces a highly elongated orbit and takes 10,000 to 20,000 years to make one journey about the sun.