Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune and the occasional appearances of Pluto- these are the planets which exist in our solar system. Or so we have been told. Recently, it has been reported that a ninth planet may be a part of our solar system. Furthermore, scientists may be quite close to determining the origin of this mysterious planet.

This relatively new addition (almost) is hanging around in the galactic space. Scientists believe that this Planet Nine, as it has been dubbed, may be "rogue" in nature. It did not enter the solar system in the very beginning, unlike all the other existent planets. It came long after the start.

What is the theory behind the origins of Planet Nine? It was born because of the ways and movements of different objects in a belt formulated beyond Neptune. It is referred to as the Kuiper belt and is a disc shaped collection of relatively smaller objects. In 2016 beginning, it was concluded that the objects in the Kuiper belt are behaving as them being attracted towards a massive planet. The size of this planet needs to be almost ten times that of Earth in order to produce such gravitational pull on these objects.

The theory about the newest planet, Planet Nine, comes from a paper submitted by James Vesper of New Mexico State University under the guidance of Paul Mason. Vesper states in his paper that the solar system may have a new member that was grabbed by the pull of the system itself while it floated around in space.

There are many other cases of "rogue" planets entering new solar systems for temporary or relatively longer periods of time. Further research is still taking place and astronomers will be able to confirm the theory of the existence of Planet Nine firmly this year.