A picture of Planet X. We do not know what it actually looks like, so we can only guess.
Hi this is Bevaan R. and I am gonna talk about Planet X, a hypothetical planet. Caltech researchers have found mathematical evidence suggesting there may be a "Planet X" deep in the solar system. This hypothetical Neptune-sized planet orbits our Sun in a highly elongated orbit far beyond Pluto. The object, which the researchers have nicknamed "Planet Nine," could have a mass about 10 times that of Earth and orbit about 20 times farther from the Sun on average than Neptune. It may take between 10,000 and 20,000 Earth years to make one full orbit around the Sun. Planet X has not yet been discovered, which means that Planet X is only hypothetical. This large object could explain the unique orbits of about 5 objects in the Kuiper belt. Astronomers studying the Kuiper Belt have noticed some of the dwarf planets and other small, icy objects tend to follow orbits that cluster together. By analyzing these orbits, the Caltech team predicted the possibility that a large, previously undiscovered planet may be hiding far beyond Pluto
The hypothetical orbit of Planet X. You can see why people aren't able to spot it, the orbit is in the opposite direction of the other objects.
Fun Facts
•"The Goblin" was found in a search for Planet X
•Astronomers think it is Neptune sized
•Some people think that Planet X is actually a small black hole
•Searches for Planet X are still in the present
•If the theorized orbit is true, it would probably take hundreds of years to find