Planet X, also known as “Planet Nine,” is a hypothetical planet in the outer regions of the solar system. It is believed to have a mass about ten times that of Earth and follows an elongated orbit that takes it far beyond the orbit of Pluto. The existence of Planet X has been suggested to explain the unusual clustering of orbits for a group of trans-Neptunian objects, but as of now, it has not been directly observed. The search for Planet X continues, and astronomers are using various methods, including telescopic surveys and mathematical modeling, to find evidence of its existence.
The term “trans-Neptunian” refers to objects in our solar system that orbit the Sun at a greater average distance than the planet Neptune. These objects include minor planets, such as Pluto and Eris, as well as other celestial bodies in the Kuiper belt. Their orbits often extend well beyond the orbit of Neptune, the most distant planet in our solar system. Scientists study trans-Neptunian objects to gain insights into the formation and evolution of our celestial neighborhood.
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