Evidence from recent years suggests that something big, and possibly very dark, is lurking in the outskirts of the solar system. This massive dark thing has been called Planet Nine, and its existence can be judged by some of the surprising cluster orbits found in small objects in the Solar System’s outer Kuiper Belt. Some scientists believe that something caused the gravitational disruption that created these orbits.

His calculations show that the mass of the object is 5-10 times that of the Earth.

However, the outer part of the solar system is very far away and it is very difficult to detect objects inside. The ninth planet, if any, should orbit the Sun at a distance 400-800 times greater than the Earth’s distance from the Sun. So, although scientists are looking for the ninth planet, no one has yet managed to find it.

One possible reason could be that the ninth planet is a dark object; like a black hole. Such a black hole would not emit light at all, but would also be extremely small and almost impossible to see, even if it could reflect light. But astronomer Man Ho Chan of Hong Kong Normal University in China thinks we can still find him.