Scientists at the California Institute of Technology (Caltech) have said that they have good evidence that a ninth planet exists on the fringes of the solar system. They believe that Planet X is as big as Neptune and is filled with gas. It orbits billions of miles beyond Neptune`s path - one revolution around the Sun may take anywhere between 10,000 and 20,000 years.
Although the planet has not been sighted, the researchers have based their findings on mathematical and computer modelling. They hope to discover it via telescope within five years or even less.
Speaking in an interview to the Astronomical Journal, the scientists said, We could have stayed quiet and quietly spent the next five years searching the skies ourselves and hoping to find it. But I would rather somebody find it sooner, than me find it later... I want to see it. I want to see what it looks like. I want to understand where it is, and I think this will help... For the first time in more than 150 years, there`s good evidence that the planetary census of the solar system is incomplete... This is a prediction. What we have found is a gravitational signature of Planet 9 lurking in the outskirts of the solar system. We have not found the object itself. We have felt a great disturbance in the force.