Mar 12, 2025 · The existence of Planet X remains theoretical at this point. This hypothetical Neptune-sized planet would circle our Sun far beyond Pluto.

Planet X is believed to be located somewhere within the Kuiper Belt, but other than many small body objects that have been located there so far, there has been no discovery of a planet-size …

Jan 8, 2025 · Planet X, also called Planet Nine, is a hypothetical planetary body seven times the mass of Earth lurking behind Pluto.

Jan 12, 2025 · Finding a planet so far from the Sun presents unique challenges. Unlike stars that emit their own light, Planet X would only reflect sunlight, making it exceptionally dim.

Planet X, a hidden giant seven times Earth’s mass, challenges astronomers with its faint light and distant orbit, potentially redefining our understanding of the solar system.

Apr 2, 2024 · Although they may sound like science fiction worlds, Planet X and Planet Nine are both hypothetical planets that have been thought to exist in our Solar System.

May 15, 2025 · Recently, a longstanding astronomical controversy has seen renewed debate, as researchers have presented what they believe to be new evidence for the existence of a …

Jul 13, 2023 · Also known as Planet Nine or Planet X, Nibiru is supposedly mentioned on ancient Sumerian clay tablets and is said to have crashed through the early Solar System creating the …

Sep 16, 2025 · Despite Pluto’s inadequacy, the term “Planet X” remained in use, referring to a more massive, undiscovered planet lurking in the outer solar system. The idea continued to …

'Planet X' is the name given for a possible, as yet undiscovered ninth planet within our solar system that was recently theorized to exist.